What do Crystal Quest filters actually remove?

With documented independent evidence: chlorine, on three components. IAPMO R&T Lab tested the SMART Countertop cartridge CQE-CT-00103 and cartridge CQE-RC-04047 for chlorine reduction to NSF/ANSI 42, both COMPLIED. QFT Laboratory tested shower cartridge CQE-RC-04045 to NSF/ANSI 177, Passed. All three are from 2020 and all three cover chlorine only. Beyond that, reduction claims rest on what the technology does in general — reverse osmosis for dissolved solids, copper-zinc redox media for chlorine and some metals, activated carbon for organics — and on the manufacturer's own ratings, not on per-contaminant testing of the system you would buy. So if your reason for buying is a specific contaminant, this is not the brand with the evidence. For documented lead reduction, or for PFAS reduction, compare against systems certified to NSF/ANSI 53 and 58. Check your water by ZIP code first, so the evidence you demand matches what is actually in your supply.

Where is Crystal Quest made, and where is the company based?

Kennesaw, Georgia — one site, which is both the headquarters and where the systems are assembled. The company was founded in Marietta, Georgia in 1994 and moved to Kennesaw around 2009. The current address, 175 Chastain Meadows Court, Suite 100, appears on the contact page and on the company's ISO 9001:2015 certificate. It has never operated outside Georgia. Assembly is domestic, using components from both domestic and overseas vendors. We have no independent evidence of which parts are made in-house, so we do not characterise that.

How long do Crystal Quest filters last?

It depends on the system, and the manufacturer's guidance is the only source for most of it. For the under-sink RO line the company recommends replacing filtration consumables together every 18-36 months, averaging around 24, with UV lamps on a separate schedule. The SMART Under Sink page estimates 10,000 gallons, roughly one to three years. The shower cartridge is 6-12 months at $29.50. Whole-house cartridge and tank capacities are manufacturer ratings that assume stated water conditions. Real service life depends on your hardness, sediment and daily volume. We have not independently tested any of these intervals, and we do not publish an annual cost estimate for this brand because the inputs are ranges rather than figures.

Is Crystal Quest better than Aquasana or APEC?

On certification evidence, no. On catalogue breadth, yes. For under-sink reverse osmosis, APEC's ROES-50 is certified to NSF/ANSI 58 with a published WQA listing and typically costs less than the Thunder 1000C at $298.40. For point-of-use filtration, Aquasana's Claryum 2-Stage AQ-5200 carries a WQA listing to NSF/ANSI 42, 53 and 401. Crystal Quest has no equivalent for either. Where Crystal Quest is genuinely different is range: one manufacturer covering a $39.95 pitcher through commercial and industrial reverse osmosis, with configurations — ultrafiltration pretreatment, UV, pressure pumps — that consumer-focused rivals do not offer. At the whole-house tier the comparison narrows, because almost nobody in the category holds NSF/ANSI 53.

Is the Thunder a whole-house system?

No. Thunder is Crystal Quest's under-sink reverse-osmosis line. Every product in the company's under-sink RO collection is a Thunder: models 1000 through 4000, with C, M and P suffixes for carbon or SMART post-filtration and a pressure pump. The 1000C (CQE-RO-00101) is $298.40. The whole-house products are different lines. The Mini Whole House SMART range (CQE-WH-01101 / 01102 / 01103) is a cartridge system at $263.85 to $412.80 whose Single, Double and Triple tiers are cartridge counts. The SMART Whole House range is the tank-based product, from $1,791.

Does Crystal Quest make a water filter pitcher?

Yes — a gravity-fed pitcher from $39.95. The Water Pitcher Filter System is CQE-PI-00600 at $39.95 for the standard SMART cartridge, with fluoride-removal, arsenic-removal, demineralising and alkalising variants at $42.95. The catalogue also includes faucet-mount, shower, countertop, inline and refrigerator-line filters, whole-house cartridge and tank systems, softeners and conditioners, and commercial and industrial equipment.

Does Crystal Quest guarantee its filters will remove what it says?

For some systems, yes — with conditions worth reading before you rely on it. The Guaranteed Performance programme covers only the systems Crystal Quest identifies as "Guaranteed Performance" units, not the whole catalogue. It applies when the company recommended the system for your water, the system has run for one to three months, and you then commission an independent laboratory test. If that test shows it is not performing, Crystal Quest reviews the report, the installation and the configuration, and recommends fixes. Two terms matter. The lab test is at your expense, and so are the remedial steps. Only if those attempts fail does the order become eligible for return and refund, with shipping and handling deducted. If the test passes, the company offers a gift card up to the cost of testing in exchange for publishing the result. That is a real commitment and an unusual one in this category. It is also not a substitute for a certification listing, because it puts the testing burden on you after purchase rather than on a certifier before it.

Crystal Quest Water Filters

A 30-year-old family-owned Georgia manufacturer with an unusually broad catalogue and genuine independent lab reports on a few cartridges — but no finished-product certification at NSF, IAPMO or WQA under its own name, which it says openly.

Best for

Buyers who want one manufacturer across many formats — pitcher through whole-house and commercial all come from the same company
Buyers who value a long-tenured family-owned US manufacturer that assembles domestically and holds a current ISO 9001:2015 registration
Buyers comfortable reading independent lab reports for specific cartridges instead of a finished-product certification listing

Not recommended for

Buyers who require a finished-product certification listing — none of the three certifier directories lists Crystal Quest
Buyers who need documented reduction for a named contaminant — the published independent testing covers chlorine only

Mid tier — typically $200–$500

Certs:No active certifications
3 SKUs
$39.95–$2107
Parent:Quest Technologies, Inc.

Certification Reality: What's Actually Tested

This table shows the NSF/IAPMO/WQA-listed certifications for each Crystal Quest SKU we tracked, alongside the contaminants the brand markets but which do not appear on the third-party listing. Green chips are third-party verified; amber chips are marketing claims without a corresponding listing. Every row links to the live certifier database so you can verify the listed claim set yourself.

SKU / Model	Standards held	What’s certified	Brand claims but NOT certified	Listing
Thunder under-sink RO (CQE-RO-00101 and family) Thunder Ultrafiltration/Reverse Osmosis Under Sink Water Filter, 1000C through 4000MP — multi-stage under-sink RO with ultrafiltration pretreatment, and UV or a pressure pump on higher models	No active certifications	No third-party listing for this SKU in our certification data	The reduction claims on the Thunder RO p… Why these aren’t certified ↓Hide details ↑ The reduction claims on the Thunder RO product pages rest on the technology, not on a certification listing for these systems No listing exists for this system at NSF, IAPMO or WQA. Reverse osmosis is a well-understood process and the absence of a listing is not evidence the membrane does not work — but it does mean no certifier has tested THIS system, audited the factory that builds it, or published the percentages it achieves. Read more	Listing TBD
Mini Whole House SMART (CQE-WH-01101 / 01102 / 01103) Mini Whole House Water Filter, SMART Series — Single, Double and Triple 20-inch cartridge configurations rated 3-6 GPM for one to two people	No active certifications	No third-party listing for this SKU in our certification data	Whole-house capacity and reduction figur… Why these aren’t certified ↓Hide details ↑ Whole-house capacity and reduction figures are manufacturer ratings, dependent on the stated water conditions, rather than certified performance Worth knowing that whole-house certification is genuinely hard to obtain across the industry — the standards' contact-time testing does not transfer well to point-of-entry flow rates, which is why most whole-house carbon systems from any brand lack NSF/ANSI 53. Crystal Quest is not an outlier here. Read more	Listing TBD
SMART Countertop (CQE-CT-00103) and shower filter (CQE-RC-04045) The two components with published independent chlorine test reports — the SMART Countertop Single and the shower filter cartridge	No active certifications	No third-party listing for this SKU in our certification data	Chlorine reduction here is independently… Why these aren’t certified ↓Hide details ↑ Chlorine reduction here is independently TESTED and documented, but tested is not certified — there is no listing, no factory audit and no ongoing surveillance behind these results This is the strongest evidence Crystal Quest publishes, and it is worth reading precisely. IAPMO R&T Lab report 2295-20618 (2020) evaluated CQE-CT-00103 for chlorine reduction to NSF/ANSI 42 and reported COMPLIED; QFT Laboratory report 20-730 tested shower cartridge CQE-RC-04045 to NSF/ANSI 177 and reported Passed; IAPMO report 2295-20552 did the same for cartridge CQE-RC-04047. These are genuine third-party tests at accredited laboratories, not in-house measurements. What they are not is certification: each report states that its results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products." They cover one contaminant, on three components, from 2020. Read more	Listing TBD

Thunder under-sink RO (CQE-RO-00101 and family)

Thunder Ultrafiltration/Reverse Osmosis Under Sink Water Filter, 1000C through 4000MP — multi-stage under-sink RO with ultrafiltration pretreatment, and UV or a pressure pump on higher models

Standards held

No active certifications

What’s certified

No third-party listing for this SKU in our certification data

Brand claims but NOT certified

The reduction claims on the Thunder RO p…

Why these aren’t certified ↓

The reduction claims on the Thunder RO product pages rest on the technology, not on a certification listing for these systems

No listing exists for this system at NSF, IAPMO or WQA. Reverse osmosis is a well-understood process and the absence of a listing is not evidence the membrane does not work — but it does mean no certifier has tested THIS system, audited the factory that builds it, or published the percentages it achieves.

Listing

Listing TBD

Mini Whole House SMART (CQE-WH-01101 / 01102 / 01103)

Mini Whole House Water Filter, SMART Series — Single, Double and Triple 20-inch cartridge configurations rated 3-6 GPM for one to two people

Standards held

No active certifications

What’s certified

No third-party listing for this SKU in our certification data

Brand claims but NOT certified

Whole-house capacity and reduction figur…

Why these aren’t certified ↓

Whole-house capacity and reduction figures are manufacturer ratings, dependent on the stated water conditions, rather than certified performance

Worth knowing that whole-house certification is genuinely hard to obtain across the industry — the standards' contact-time testing does not transfer well to point-of-entry flow rates, which is why most whole-house carbon systems from any brand lack NSF/ANSI 53. Crystal Quest is not an outlier here.

Listing

Listing TBD

SMART Countertop (CQE-CT-00103) and shower filter (CQE-RC-04045)

The two components with published independent chlorine test reports — the SMART Countertop Single and the shower filter cartridge

Standards held

No active certifications

What’s certified

No third-party listing for this SKU in our certification data

Brand claims but NOT certified

Chlorine reduction here is independently…

Why these aren’t certified ↓

Chlorine reduction here is independently TESTED and documented, but tested is not certified — there is no listing, no factory audit and no ongoing surveillance behind these results

This is the strongest evidence Crystal Quest publishes, and it is worth reading precisely. IAPMO R&T Lab report 2295-20618 (2020) evaluated CQE-CT-00103 for chlorine reduction to NSF/ANSI 42 and reported COMPLIED; QFT Laboratory report 20-730 tested shower cartridge CQE-RC-04045 to NSF/ANSI 177 and reported Passed; IAPMO report 2295-20552 did the same for cartridge CQE-RC-04047. These are genuine third-party tests at accredited laboratories, not in-house measurements. What they are not is certification: each report states that its results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products." They cover one contaminant, on three components, from 2020.

Listing

Listing TBD

Check Certification for a Crystal Quest Filter

This widget shows the third-party-listed certifications for Crystal Quest SKUs only. Type a model number to filter the list below — every result links to the full breakdown. To search across every brand we track, use the global certification tool. For the standards Crystal Quest holds and the certifier behind each listing in one place, see Is Crystal Quest NSF certified?

Certification data for Crystal Quest is being researched. Try the global certification tool for cross-brand search.

Listings as of Oct 5, 2026.

About Crystal Quest

Crystal Quest is a family-owned water-filtration manufacturer in Kennesaw, Georgia, trading since 1994 and operating as Quest Technologies, Inc.

The catalogue is unusually broad for a consumer brand: pitchers, faucet-mount and shower filters, countertop and under-sink systems, inline and refrigerator filters, whole-house cartridge and tank systems, water softeners and conditioners, and commercial and industrial equipment including reverse osmosis and desalination. Most systems are built around the company's own Eagle Redox Alloy (ERA) copper-zinc media, usually combined with carbon and sediment stages and marketed as the SMART series.

The company holds a current ISO 9001:2015 quality-management registration and publishes independent laboratory reports for a small number of components. It does not hold finished-product certification under its own name at NSF, IAPMO or WQA, and says so.

Founded:1994, in Marietta, Georgia. Quest Technologies, Inc. was incorporated on 1995-05-05 and Crystal Quest is its brand; Mike Sigari founded the company and is CEO. The 1994 date is corroborated three ways: the Better Business Bureau records the business as started in 1995, the company's own About page says "over 30 years", and a 1998 capture of crystalquest.com already shows an operating Marietta, Georgia business trading as a trade mark of Quest Technologies, Inc.

Headquarters:175 Chastain Meadows Court, Suite 100, Kennesaw, Georgia 30144 — one location, which is both the headquarters and the operating site. The company operated in Marietta, Georgia from 1994 until around 2009 and has been in Kennesaw since. Archived captures track the move: Marietta in 1998, a Kennesaw sales office alongside Marietta shipping in 2005, and Kennesaw alone thereafter. The current address appears on the contact page and on the 2026 ISO certificate.

Parent company:Quest Technologies, Inc.

Ownership history

1994
Mike Sigari founds Crystal Quest in Marietta, Georgia. Quest Technologies, Inc. is incorporated the following year, on 1995-05-05.
1998
The earliest archived crystalquest.com sells a four-stage countertop system for $89 from 1640 Powers Ferry Road, Marietta, on the redox-media principle the company still builds on.
circa 2009
Operations consolidate in Kennesaw, Georgia. The ISO 9001 registration is first approved on 2009-08-20 and has been maintained since.
2020
IAPMO R&T Lab and QFT Laboratory test three components for chlorine reduction to NSF/ANSI 42 and NSF/ANSI 177. These are the published independent test reports.
2026
Still privately held and family-owned, operating from a single Kennesaw site, with Mike Sigari as CEO and Alahn Sigari as President.

Thunder — under-sink reverse osmosis

The RO line, and an under-sink product rather than a whole-house one. Models run 1000 through 4000 with ultrafiltration, UV and pressure-pump options; the 1000C (CQE-RO-00101) is $298.40 and the 1000M (CQE-RO-00109) is $334.35.

Mini Whole House SMART — cartridge whole-house

CQE-WH-01101 / 01102 / 01103, sold as Single, Double and Triple cartridge configurations at $263.85 / $335.33 / $412.80, rated 3-6 GPM for one to two people. Single is SMART media; Double adds carbon block; Triple adds sediment.

SMART Whole House — tank systems

The tank-based whole-house range, 9-13 GPM. Standalone fiberglass models start at $1,791 for 1.5 cubic feet (CQE-WH-01114) and $2,107 for 2 cubic feet (CQE-WH-01115); stainless tanks and softener or conditioner packages cost more.

SMART Under Sink — non-RO

Single, Double and Triple cartridge systems (CQE-US-00303 / 00306 / 00309) at $149.90 / $178.35 / $208.80, supplied with a faucet and installation hardware.

Countertop, pitcher and inline

SMART Countertop Single, Double and Triple at $86.90 / $125.35 / $154.80, a separate 80,000-gallon countertop family at $199 / $249 / $299, and a gravity pitcher from $39.95.

Refrigerator and appliance line filters

External inline filters that fit the appliance's water supply line rather than its internal cartridge bay — so they are not a replacement for an OEM fridge cartridge. Voyager Mini (CQE-RF-00703) $59, Voyager Ultra (CQE-IN-00300) $89, replaceable-cartridge Voyager Single Inline from $119, and SMART/In-Line refrigerator models from $109.

Designed, manufactured and assembled in the United States, at the company's single Kennesaw, Georgia site.

The About page describes combining American engineering and in-house design with components from domestic and global vendors, and assembling each product in the USA. The ISO 9001:2015 registration is the stronger evidence: its audited scope is "design, manufacture and marketing of high capacity, effective water filters" at the Kennesaw address, which covers more than final assembly. The 2020 laboratory reports name Quest Technologies Inc dba Crystal Quest Water Filters as the manufacturer that submitted the samples.

We have no independent evidence about which components are made in-house versus bought in, and do not characterise that split.

Crystal Quest products we have verified

Each page checks the model's certification listings live in the NSF, IAPMO R&T and WQA directories, separates what the brand claims from what a certifier has listed, and prices ten years of ownership.

Crystal Quest Bath Ball Filter review: specs, true cost and cert check
Complete system · checked 2026-09-10
Crystal Quest Countertop Filter review: specs, true cost and cert check
Complete system · checked 2026-09-10
Crystal Quest Shower Filter review: specs, true cost and cert check
Complete system · checked 2026-08-31
Crystal Quest Whole House Softener review: specs, true cost and cert check
Complete system · checked 2026-09-10

Which Crystal Quest Filter Is Right for You?

We mapped each Crystal Quest SKU’s NSF-listed certifications against the 10 contaminants people search for most. Where Crystal Quest doesn’t have a certified SKU, we say so.

Lead

Not the right choice if Lead is your priority — no certified Crystal Quest SKU for Lead. Consider an NSF/ANSI 53-listed filter.

PFAS

Not the right choice if PFAS is your priority — no certified Crystal Quest SKU for PFAS. Consider an NSF/ANSI 53-listed filter.

Fluoride

Not the right choice if Fluoride is your priority — no certified Crystal Quest SKU for Fluoride. Consider an NSF/ANSI 53-listed filter.

Arsenic

Not the right choice if Arsenic is your priority — no certified Crystal Quest SKU for Arsenic. Consider an NSF/ANSI 53-listed filter.

Nitrate

Not the right choice if Nitrate is your priority — no certified Crystal Quest SKU for Nitrate. Consider an NSF/ANSI 53-listed filter.

Chromium-6

Not the right choice if Chromium-6 is your priority — no certified Crystal Quest SKU for Chromium-6. Consider an NSF/ANSI 53-listed filter.

Mercury

Not the right choice if Mercury is your priority — no certified Crystal Quest SKU for Mercury. Consider an NSF/ANSI 53-listed filter.

Atrazine

Not the right choice if Atrazine is your priority — no certified Crystal Quest SKU for Atrazine. Consider an NSF/ANSI 53-listed filter.

Chloroform

Not the right choice if Chloroform is your priority — no certified Crystal Quest SKU for Chloroform. Consider an NSF/ANSI 53-listed filter.

Cysts

Not the right choice if Cysts is your priority — no certified Crystal Quest SKU for Cysts. Consider an NSF/ANSI 53-listed filter.

How Crystal Quest Compares

Crystal Quest vs Aquasana

Feature	Crystal Quest	Aquasana
Finished-product certification	None under the brand name at NSF, IAPMO or WQA. The company states its complete systems are not currently NSF certified.	Several point-of-use systems carry WQA Gold Seal listings — the Claryum 2-Stage AQ-5200 is listed to NSF/ANSI 42, 53 and 401. The Rhino whole-house range is not certified.
Independent testing published	Three reports from IAPMO R&T Lab and QFT Laboratory, all chlorine, all 2020, on three components.	Publishes performance data sheets; the certified SKUs' evidence is the WQA listing itself.
Catalogue breadth	Very broad — pitcher through industrial RO and desalination from one manufacturer.	Focused consumer range: shower, countertop, under-sink, whole-house.
Ownership	Privately held and family-owned as Quest Technologies, Inc. since 1994.	Owned by A. O. Smith Corporation (NYSE: AOS) since 2016.

Finished-product certification

Crystal Quest

None under the brand name at NSF, IAPMO or WQA. The company states its complete systems are not currently NSF certified.

Aquasana

Several point-of-use systems carry WQA Gold Seal listings — the Claryum 2-Stage AQ-5200 is listed to NSF/ANSI 42, 53 and 401. The Rhino whole-house range is not certified.

Independent testing published

Crystal Quest

Three reports from IAPMO R&T Lab and QFT Laboratory, all chlorine, all 2020, on three components.

Aquasana

Publishes performance data sheets; the certified SKUs' evidence is the WQA listing itself.

Catalogue breadth

Crystal Quest

Very broad — pitcher through industrial RO and desalination from one manufacturer.

Aquasana

Focused consumer range: shower, countertop, under-sink, whole-house.

Ownership

Crystal Quest

Privately held and family-owned as Quest Technologies, Inc. since 1994.

Aquasana

Owned by A. O. Smith Corporation (NYSE: AOS) since 2016.

If a certification listing is what you want, Aquasana's certified point-of-use SKUs have it and Crystal Quest has nothing equivalent. If you want one manufacturer to cover a pitcher, a shower, an under-sink system and a whole-house tank, Crystal Quest's catalogue does that and Aquasana's does not. Note that at the whole-house tier neither brand is certified.

Sources for facts in this comparison

[1]
NSF listingaccessed: 2026-09-10
https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Crystal+Quest
- NSF International's drinking-water treatment-unit directory returns no listing for "Crystal Quest" or "Quest Technologies". Cross-checked against our full 2026-08-23 certifier corpus: 0 matching rows in 36,166 (26,362 NSF + 1,844 IAPMO + 7,960 WQA), with control brands returning matches in the same corpus, so the absence is a real absence rather than a failed query.
[2]
Manufacturer datasheetaccessed: 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/Smart_Cartdige_Chlorine_Test_CQE-CT-00103_2020_2295-20618_Chlorine_Pass.pdf?v=1679586319
- IAPMO R&T Lab report 2295-20618, issued 2020-11-12, evaluated model CQE-CT-00103 for chlorine reduction to NSF/ANSI 42-2019 at IAPMO R&T Lab, Ontario CA, and reports "COMPLIED". The report states its own limit: the results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products."
[3]
Brand officialaccessed: 2026-09-10
https://crystalquest.com/pages/about-us
- Crystal Quest's About page describes the company as a manufacturer serving residential, commercial and industrial markets that assembles "each product right here in the USA", and states "We have been in the water filtration business for over 30 years" — consistent with a 1994 founding.

Crystal Quest vs APEC Water Systems

Feature	Crystal Quest	APEC Water Systems
Under-sink RO certification	The Thunder RO line carries no certification listing in any of the three directories we index.	The ROES-50 is WQA Gold Seal certified to NSF/ANSI 58 — the system itself, with a published listing.
Entry price, under-sink RO	Thunder 1000C at $298.40 (2026-09-10).	ROES-50 typically $200-$250.
What you are paying for	More stages, ultrafiltration pretreatment, and UV or pump options within one family.	A certified, conventional five-stage RO system.

Under-sink RO certification

Crystal Quest

The Thunder RO line carries no certification listing in any of the three directories we index.

APEC Water Systems

The ROES-50 is WQA Gold Seal certified to NSF/ANSI 58 — the system itself, with a published listing.

Entry price, under-sink RO

Crystal Quest

Thunder 1000C at $298.40 (2026-09-10).

APEC Water Systems

ROES-50 typically $200-$250.

What you are paying for

Crystal Quest

More stages, ultrafiltration pretreatment, and UV or pump options within one family.

APEC Water Systems

A certified, conventional five-stage RO system.

For under-sink RO specifically, APEC's ROES-50 is both cheaper and independently certified to NSF/ANSI 58, which is a straightforward advantage. Crystal Quest's Thunder line offers configurations APEC does not — ultrafiltration, UV, pressure pump — so the trade is options against a certification listing.

Sources for facts in this comparison

[1]
NSF listingaccessed: 2026-09-10
https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Crystal+Quest
- NSF International's drinking-water treatment-unit directory returns no listing for "Crystal Quest" or "Quest Technologies". Cross-checked against our full 2026-08-23 certifier corpus: 0 matching rows in 36,166 (26,362 NSF + 1,844 IAPMO + 7,960 WQA), with control brands returning matches in the same corpus, so the absence is a real absence rather than a failed query.
[2]
Brand officialaccessed: 2026-09-10
https://crystalquest.com/collections/under-sink-reverse-osmosis-filtration-systems
- Every product in Crystal Quest's under-sink reverse-osmosis collection is named "Thunder Ultrafiltration/Reverse Osmosis Under Sink Water Filter" — the Thunder line is under-sink RO, not a whole-house system. The 1000C (CQE-RO-00101) is $298.40 and the 1000M (CQE-RO-00109) is $334.35.

Looking for a broader comparison? See our full whole-house filter roundup.

Explore other brands: APEC Water Systems, AquaBliss, Aquaboon, Aquagear, AquaTru, Boroux, EveryDrop, Frigidaire, GE Appliances, iSpring, Kenmore, Kind Water Systems, LG, Multipure, LifeStraw, Rorra, Samsung, Whirlpool, Solventum, SpringWell Water Filtration Systems, Pentair, Omnipure, Pelican Water, Hydroviv, Brondell, Bluevua, Berkey, ZeroWater, Aquasana, Express Water, Frizzlife, Epic Water Filters, Culligan, Clearly Filtered, Waterdrop, PUR, Doulton, Brita, and Propur.

What Reddit Says About Crystal Quest

Community signals for Crystal Quest are being researched — check back soon.

Crystal Quest Customer Reviews Summary

111Total Reviews

4.3

Average

What Customers Love

Common Concerns

The figure above is Trustpilot's, counted on 2026-09-10: 111 reviews at a 4.3 TrustScore. It is the only Crystal Quest review population we could independently verify.

The company reports 4,190 reviews averaging 4.92 on its own product-reviews page. That widget is client-rendered and we could not read it server-side, so we report it as the company's own figure rather than as a verified one. The two populations are separate and neither is an Amazon total.

We do not publish a per-SKU review breakdown for this brand, because neither review population above can be broken down by SKU in a form we could verify.

Sources for Crystal Quest review data

[1]
Retailer listingaccessed: 2026-09-10
https://www.trustpilot.com/review/crystalquest.com
- Crystal Quest's Trustpilot profile showed 111 reviews at a 4.3 TrustScore on 2026-09-10, and lists the company at 175 Chastain Meadows Court #100, Kennesaw.

Review counts and ratings are as published by the sources above, on the dates shown. Individual results may vary.

About Crystal Quest Marketing Language

Some claims on Crystal Quest packaging and product pages are frequently confused with what the underlying third-party certifications actually cover. The note below documents one such mismatch with primary-source citations so you can verify the specifics yourself.

Tested to a standard is not certified to it

Crystal Quest publishes real independent lab reports, and they are not certifications. The distinction is the single most useful thing to understand about this brand.

What exists: IAPMO R&T Lab report 2295-20618 evaluated the SMART Countertop cartridge CQE-CT-00103 for chlorine reduction to NSF/ANSI 42 and reported COMPLIED. IAPMO 2295-20552 did the same for cartridge CQE-RC-04047. QFT Laboratory report 20-730 tested shower cartridge CQE-RC-04045 to NSF/ANSI 177 and reported Passed. These are accredited third-party laboratories, and the reports are published in full.

What that means: a laboratory took the samples the manufacturer sent and measured them once, in 2020, for one contaminant. Each report says so itself — the results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products."

What a certification listing adds: the certifier audits the factory, tests samples it selects, keeps testing on a surveillance schedule, and publishes a directory record naming the model and the reduction percentages it is listed for. Searching the three certifier directories we index returns no Crystal Quest entry, and the company confirms its complete systems are not currently NSF certified.

So read a Crystal Quest claim by asking which SKU and which contaminant. Chlorine on three components has documented evidence. Everything else rests on the technology and the manufacturer's own ratings.

One open question we have not resolved: the company's ERA-6500 page states the medium is NSF-certified to NSF/ANSI 42. Our certifier corpus carries no such record. It may be held under a supplier we do not scrape. We have not confirmed it, so we do not repeat it.

Sources

[1]
Manufacturer datasheetaccessed: 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/Smart_Cartdige_Chlorine_Test_CQE-CT-00103_2020_2295-20618_Chlorine_Pass.pdf?v=1679586319
- IAPMO R&T Lab report 2295-20618, issued 2020-11-12, evaluated model CQE-CT-00103 for chlorine reduction to NSF/ANSI 42-2019 at IAPMO R&T Lab, Ontario CA, and reports "COMPLIED". The report states its own limit: the results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products."
[2]
Manufacturer datasheetaccessed: 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/CQE-RC-04047_2020_2295-20552_Chlorine_Pass.pdf?v=1679586311
- IAPMO R&T Lab report 2295-20552, issued 2020-09-11, evaluated cartridge CQE-RC-04047 for chlorine reduction to NSF/ANSI 42-2019 and reports COMPLIED. Tested for Quest Technologies Inc dba Crystal Quest Water Filters, reported to ASSE International.
[3]
Manufacturer datasheetaccessed: 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/Smart_Shower_Head_CQE-RC-04045_2020_20-730_Chlorine_Pass.pdf?v=1679587419
- QFT Laboratory report 20-730-Chlorine, dated 2020-09-04, tested shower filter CQE-RC-04045 to NSF/ANSI 177 chlorine reduction at 100% of a 500-gallon capacity, 1.5 gpm, and reports Passed.
[4]
NSF listingaccessed: 2026-09-10
https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Crystal+Quest
- NSF International's drinking-water treatment-unit directory returns no listing for "Crystal Quest" or "Quest Technologies". Cross-checked against our full 2026-08-23 certifier corpus: 0 matching rows in 36,166 (26,362 NSF + 1,844 IAPMO + 7,960 WQA), with control brands returning matches in the same corpus, so the absence is a real absence rather than a failed query.
[5]
Brand officialaccessed: 2026-09-10
https://crystalquest.com/products/eagle-redox-alloy-6500
- The product is titled "Eagle Redox Alloy(R) 6500 (per pound)", SKU CQE-ER-06500, and the description calls it "CRYSTAL QUEST(R) ERA 6500 Medium" — ERA is Crystal Quest's own trademark for a copper-zinc redox medium, not an abbreviation of a supplier name. The same page asserts NSF/ANSI 42 certification for the medium, which our certifier corpus does not carry.

Verified 2026-09-10.

Frequently Asked Questions About Crystal Quest Water Filters

No — not as a finished product, and the company says so plainly: its complete systems are not currently NSF certified.

Searching the three certifier directories we index — NSF at info.nsf.org, IAPMO R&T at pld.iapmo.org, and WQA Gold Seal at find.wqa.org — returns nothing under "Crystal Quest" or "Quest Technologies". We also checked our own copy of those directories, 36,166 listing rows captured on 2026-08-23, and found zero matches while control brands returned theirs.

What does exist is independent laboratory testing on individual components, described in the next answer. The company has said it plans to pursue certification for selected complete systems.

How we check certifications is documented in our methodology.

Sources: ^[1]

How We Researched Crystal Quest

Our brand assessments follow a four-tier source ladder. We start with Tier 1 primary sources — NSF International, IAPMO, and WQA certification listings, plus SEC filings and EPA records — to establish what is third-party verified. We then layer in brand-official statements (corporate sites, datasheets, support pages) for context, tier-1 journalism for independent reporting, and community signals (Reddit threads, Amazon reviews) for real-world ownership experience. Every claim on this page traces back to one of the citations below.

Reviewed by TapWaterData Editorial.

Last full review: 2026-09-10 · Next scheduled review: 2027-03-10

All sources (18)

Brand officialAccessed 2026-09-10
https://crystalquest.com/pages/contact-us
Crystal Quest's contact page publishes one address — "175 Chastain Meadows Court, Kennesaw, GA 30144" — plus the phone numbers 770-951-5600 and (800) 934-0051. It lists no other address and no second location.
Brand officialAccessed 2026-09-10
https://web.archive.org/web/19981212024112/http://www.crystalquest.com:80/
The 1998-12-12 capture of crystalquest.com footers the page "Crystal Quest(R) 1640 Powers Ferry Road ~ Bldg 22, Marietta, GA 30067" and states "Crystal Quest is a trade-mark of Quest Technologies, Inc." — contemporaneous primary evidence that the company operated from Marietta, Georgia in the 1990s under the corporate entity Quest Technologies, Inc.
Brand officialAccessed 2026-09-10
https://web.archive.org/web/20050201000000/http://www.crystalquest.com/
The 2005 capture lists "Sales and Marketing Dept. 125 Town Park Drive Suite 300 Kennesaw, GA 30144" alongside "Shipping: 2150 Northwest Pkwy, Suite N, Marietta, GA 30067" — both Georgia, documenting the Marietta-to-Kennesaw transition and showing no operations in any other state.
Manufacturer datasheetAccessed 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/iso9001-cert-202608.pdf?v=1788380549
QAS International certificate US3079 is issued to "Crystal Quest(R)/Quest Technologies, Inc., 175 Chastain Meadows Court, Suite 100, Kennesaw, GA 30144, USA" for ISO 9001:2015, scope "Design, manufacture and marketing of high capacity, effective water filters to all levels of customers", original approval 2009-08-20, current certificate 2026-08-13, expiry 2027-08-13.
Government agencyAccessed 2026-09-10
https://www.bbb.org/us/ga/kennesaw/profile/water-purification-equipment/crystal-quest-0443-27117914
The Better Business Bureau profile records the business as started 5/5/1995 at 175 Chastain Meadows Ct NW, Kennesaw GA 30144, with principals "Mr. Mike Sigari, CEO" and "Mr. Alahn Sigari, VP", alternate names "Crystal Quest Water Filters", "Quest Technologies, Inc." and "Crystal Quest Manufacturing", BBB-accredited since 2/22/2008 with an A+ rating.
NSF listingAccessed 2026-09-10
https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Crystal+Quest
NSF International's drinking-water treatment-unit directory returns no listing for "Crystal Quest" or "Quest Technologies". Cross-checked against our full 2026-08-23 certifier corpus: 0 matching rows in 36,166 (26,362 NSF + 1,844 IAPMO + 7,960 WQA), with control brands returning matches in the same corpus, so the absence is a real absence rather than a failed query.
Manufacturer datasheetAccessed 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/Smart_Cartdige_Chlorine_Test_CQE-CT-00103_2020_2295-20618_Chlorine_Pass.pdf?v=1679586319
IAPMO R&T Lab report 2295-20618, issued 2020-11-12, evaluated model CQE-CT-00103 for chlorine reduction to NSF/ANSI 42-2019 at IAPMO R&T Lab, Ontario CA, and reports "COMPLIED". The report states its own limit: the results "apply only to the specific samples tested and are not indicative of the quality or performance of similar or identical products."
Manufacturer datasheetAccessed 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/CQE-RC-04047_2020_2295-20552_Chlorine_Pass.pdf?v=1679586311
IAPMO R&T Lab report 2295-20552, issued 2020-09-11, evaluated cartridge CQE-RC-04047 for chlorine reduction to NSF/ANSI 42-2019 and reports COMPLIED. Tested for Quest Technologies Inc dba Crystal Quest Water Filters, reported to ASSE International.
Manufacturer datasheetAccessed 2026-09-10
https://cdn.shopify.com/s/files/1/1286/9985/files/Smart_Shower_Head_CQE-RC-04045_2020_20-730_Chlorine_Pass.pdf?v=1679587419
QFT Laboratory report 20-730-Chlorine, dated 2020-09-04, tested shower filter CQE-RC-04045 to NSF/ANSI 177 chlorine reduction at 100% of a 500-gallon capacity, 1.5 gpm, and reports Passed.
Retailer listingAccessed 2026-09-10
https://www.trustpilot.com/review/crystalquest.com
Crystal Quest's Trustpilot profile showed 111 reviews at a 4.3 TrustScore on 2026-09-10, and lists the company at 175 Chastain Meadows Court #100, Kennesaw.
Brand officialAccessed 2026-09-10
https://crystalquest.com/collections/under-sink-reverse-osmosis-filtration-systems
Every product in Crystal Quest's under-sink reverse-osmosis collection is named "Thunder Ultrafiltration/Reverse Osmosis Under Sink Water Filter" — the Thunder line is under-sink RO, not a whole-house system. The 1000C (CQE-RO-00101) is $298.40 and the 1000M (CQE-RO-00109) is $334.35.
Brand officialAccessed 2026-09-10
https://crystalquest.com/products/slimline-whole-house-water-filter-smart-series
The storefront product "Mini Whole House Water Filter, SMART Series (3-6 GPM | 1-2 people)" carries SKUs CQE-WH-01101 / 01102 / 01103 as Single / Double / Triple CARTRIDGE configurations at $263.85 / $335.33 / $412.80 without a stand, and $362.85 / $444.33 / $531.80 with one. The tiers are cartridge counts, not bathroom counts.
Brand officialAccessed 2026-09-10
https://crystalquest.com/products/smart-whole-house-water-filter
The tank-based "SMART Whole House Water Filter (9-13 GPM)" lists standalone fiberglass models CQE-WH-01114 (1.5 cu ft) at $1,791.00 and CQE-WH-01115 (2 cu ft) at $2,107.00, with stainless and softener/conditioner packages priced separately up to $5,242.00.
Brand officialAccessed 2026-09-10
https://crystalquest.com/products/smart-under-sink-water-filter-system
The non-RO SMART Under Sink family lists CQE-US-00303 Single at $149.90, CQE-US-00306 Double at $178.35 and CQE-US-00309 Triple at $208.80.
Brand officialAccessed 2026-09-10
https://crystalquest.com/products/water-filter-pitcher
Crystal Quest sells a gravity-fed Water Pitcher Filter System: CQE-PI-00600 Standard (SMART) at $39.95, with fluoride-removal, arsenic-removal, demineralising and alkalising variants at $42.95 — a complete pitcher under $50.
Brand officialAccessed 2026-09-10
https://crystalquest.com/products/eagle-redox-alloy-6500
The product is titled "Eagle Redox Alloy(R) 6500 (per pound)", SKU CQE-ER-06500, and the description calls it "CRYSTAL QUEST(R) ERA 6500 Medium" — ERA is Crystal Quest's own trademark for a copper-zinc redox medium, not an abbreviation of a supplier name. The same page asserts NSF/ANSI 42 certification for the medium, which our certifier corpus does not carry.
Brand officialAccessed 2026-09-10
https://crystalquest.com/pages/about-us
Crystal Quest's About page describes the company as a manufacturer serving residential, commercial and industrial markets that assembles "each product right here in the USA", and states "We have been in the water filtration business for over 30 years" — consistent with a 1994 founding.
Brand officialAccessed 2026-09-11
https://crystalquest.com/pages/our-guaranteed-performance
Crystal Quest's Guaranteed Performance page covers only "the filtration systems identified as “Guaranteed Performance” units" and sets four conditions: the system is recommended by Crystal Quest from a lab test or the customer's description of their water; it runs 1-3 months before testing; "a test report is requested and provided by an independent third-party laboratory at the customer’s expense"; and remedial recommendations are "discussed and implemented at the customer’s expense". Only if those attempts are unsuccessful is "the order eligible for return and refund", with shipping and handling deducted. A passing result earns the customer a gift card up to the cost of testing if they let Crystal Quest publish the result.

Crystal Quest Water Filters

Best for

Not recommended for

Certification Reality: What's Actually Tested

Check Certification for a Crystal Quest Filter

About Crystal Quest

Ownership history

Thunder — under-sink reverse osmosis

Mini Whole House SMART — cartridge whole-house

SMART Whole House — tank systems

SMART Under Sink — non-RO

Countertop, pitcher and inline

Refrigerator and appliance line filters

Crystal Quest products we have verified

Which Crystal Quest Filter Is Right for You?

How Crystal Quest Compares

Crystal Quest vs Aquasana

Crystal Quest vs APEC Water Systems

What Reddit Says About Crystal Quest

Crystal Quest Customer Reviews Summary

What Customers Love

Common Concerns

About Crystal Quest Marketing Language

Tested to a standard is not certified to it

Frequently Asked Questions About Crystal Quest Water Filters

Is Crystal Quest NSF certified?

What do Crystal Quest filters actually remove?

Where is Crystal Quest made, and where is the company based?

How long do Crystal Quest filters last?

Is Crystal Quest better than Aquasana or APEC?

Is the Thunder a whole-house system?

Does Crystal Quest make a water filter pitcher?

Does Crystal Quest guarantee its filters will remove what it says?

How We Researched Crystal Quest

All sources (18)

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