Guadalupe Tap Water Quality Report
Guadalupe's water record shows 6 contaminants with an EPA health goal detected in some samples (no level on file) and 1 nitrate reading above 10 mg/L whose basis is unconfirmed (above EPA's limit if measured as nitrogen, within it if measured as nitrate). Consider using a certified water filter for additional protection.
Water system
GUADALUPE WATER DEPARTMENT
People Served
8,293
Health-based violations since 2020
0
GUADALUPE WATER DEPARTMENT. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Jan 2022 · GUADALUPE WATER DEPARTMENT
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Guadalupe Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Guadalupe's water record shows 6 contaminants with an EPA health goal detected in some samples (no level on file) and 1 nitrate reading above 10 mg/L whose basis is unconfirmed (above EPA's limit if measured as nitrogen, within it if measured as nitrate).
GUADALUPE WATER DEPARTMENT, Guadalupe's water system, serves 8,293 people. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for GUADALUPE WATER DEPARTMENT is from Jan 2022.
In EPA's 2023–2026 UCMR 5 testing, GUADALUPE WATER DEPARTMENT measured lithium at up to 18.9 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California
Guadalupe Water Service Areas
What these numbers actually mean for Guadalupe, CA
We read Guadalupe, CA’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 6 contaminants with an EPA health goal detected in some samples (no level on file) and 1 nitrate reading above 10 mg/L whose basis is unconfirmed (above EPA's limit if measured as nitrogen, within it if measured as nitrate)
- 35 results on file
- 23 PFAS compounds on record
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General-Purpose Water Filters for Guadalupe
Guadalupe's results show no result above EPA's health goals or legal limits, so these are general-purpose NSF/ANSI 53 certified filters, not chosen for any contaminant.
Pentair Residential Filtration, LLC
Everpure Residential H-300-NXT
NSF Certified:
Capacity
3001 gal
Filter Life
10 mo
Flow Rate
0.5 gpm
Removes 5 contaminants:
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Whirlpool Corporation
W11569861
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.52 gpm
Removes 22 contaminants:
+17 more
Atrazine, Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Styrene, Tetrachloroethylene, Toxaphene, Trichloroethylene, Turbidity
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Guadalupe's water readings can explain
We publish a city-level hardness figure for Guadalupe, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Guadalupe? Public-water results do not apply to private wells. See Santa Barbara County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Guadalupe
Guadalupe's tap water has an estimated 30.4 grains per gallon (519.0 mg/L, county sampling in Santa Barbara County) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 30.4 gpg water in Guadalupe — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For California as a whole, read water softener cost in California — priced against the plumber wage published for the state.
Frequently Asked Questions About Guadalupe Tap Water
Guadalupe's water record shows 6 contaminants with an EPA health goal detected in some samples (no level on file) and 1 nitrate reading above 10 mg/L whose basis is unconfirmed (above EPA's limit if measured as nitrogen, within it if measured as nitrate). We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach GUADALUPE WATER DEPARTMENT. For a problem with your water now (discolored water, no water, low pressure, a leak), contact GUADALUPE WATER DEPARTMENT directly.
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