Joliet Tap Water Quality Report
Joliet's water has 2 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
1 other system serving parts of Joliet reports results above guidelines — check which system bills you. GARDEN STREET IMPROVEMENT ASSOCIATION (3 above guidelines)
Other systems listed for Joliet with results above guidelines: COUNTRYSIDE ESTATES MHP (1 above guidelines), FOUR STAR CAMPGROUND (3 above guidelines)
Water system
JOLIET
1 other system also serves parts of Joliet. 3 other systems are listed for Joliet. See their figures
People Served
148,693
Health-based violations since 2020
0
JOLIET. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Jul 2025 · JOLIET
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Joliet 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. Joliet's water has 2 contaminants above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
JOLIET, Joliet's water system, serves 148,693 people. 1 other system also serves parts of Joliet. 3 other systems are listed for Joliet. Each system's results are listed under its own name, never added to JOLIET's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for JOLIET is from Jul 2025.
In EPA's 2023–2026 UCMR 5 testing, JOLIET measured lithium at up to 54.7 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 Illinois
Joliet Water Service Areas
What these numbers actually mean for Joliet, IL
We read Joliet, IL’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.
- 2 contaminants above EPA MCLGs and 12 contaminants with an EPA health goal detected in some samples (no level on file)
- 140 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Joliet
Based on Joliet's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
Solventum Purification Inc.
3MRO401
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
Solventum Purification Inc.
3MRO301
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
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 Joliet's water readings can explain
Utility-reported data for Joliet includes sulfate and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Joliet, 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 Joliet? Public-water results do not apply to private wells. See Will County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Joliet
Joliet's tap water measures 14.3 grains per gallon (244.0 mg/L) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 14.3 gpg water in Joliet — 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 Illinois as a whole, read water softener cost in Illinois — priced against the plumber wage published for the state.
Frequently Asked Questions About Joliet Tap Water
Joliet's water has 2 contaminants above EPA MCLGs. While the water meets federal legal limits, 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 JOLIET. For a problem with your water now (discolored water, no water, low pressure, a leak), contact JOLIET directly.
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