Lemont Tap Water Quality Report
Lemont's water record shows 1 contaminant above EPA MCLGs, 7 contaminants with an EPA health goal detected in some samples (no level on file) and an EPA lead 90th percentile above the 15 ppb action level. We recommend using a certified water filter.
Other systems listed for Lemont with results above guidelines: IL AMERICAN-LIBERTY RIDGE WEST (2 above guidelines), IL AMERICAN-CHICAGO SUBURBAN (2 above guidelines), IL AMERICAN-VALLEY VIEW (3 above guidelines), IL AMERICAN-DUPAGE UTILITY (2 above guidelines), IL AMERICAN-VALLEY MARINA (4 above guidelines), IL AMERICAN-WAYCINDEN (2 above guidelines), IL AMERICAN-ARROWHEAD (2 above guidelines)
People Served
17,000
Health-based violations since 2020
0
LEMONT. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
May 2025 · LEMONT
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Lemont Tap Water Safe to Drink?
We strongly recommend using a certified water filter to reduce exposure: Lemont's water record shows 1 contaminant above EPA MCLGs, 7 contaminants with an EPA health goal detected in some samples (no level on file) and an EPA lead 90th percentile above the 15 ppb action level. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lemont's water.
LEMONT, Lemont's water system, serves 17,000 people. 7 other systems are listed for Lemont. Each system's results are listed under its own name, never added to LEMONT's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for LEMONT is from May 2025.
In EPA's 2023–2026 UCMR 5 testing, LEMONT measured lithium at up to 53.8 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
Lemont Water Service Areas
What these numbers actually mean for Lemont, IL
We read Lemont, 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.
- 1 contaminant above EPA MCLGs, 7 contaminants with an EPA health goal detected in some samples (no level on file) and an EPA lead 90th percentile above the 15 ppb action level
- 125 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Lemont
Based on Lemont's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs and to reduce lead (its water system's EPA lead 90th percentile is above the 15 ppb action level).
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
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
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
Verify Your Water Quality with Independent Testing
With 1 contaminant above EPA MCLGs, 7 contaminants with an EPA health goal detected in some samples (no level on file) and an EPA lead 90th percentile above the 15 ppb action level, independent laboratory testing provides a second opinion and can track changes over time.
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 Lemont's water readings can explain
Utility-reported data for Lemont includes iron, manganese, sulfate and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Lemont, 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 Lemont? Public-water results do not apply to private wells. See Cook County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Lemont
Lemont's tap water measures 13.1 grains per gallon (224.0 mg/L) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 13.1 gpg water in Lemont — 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 Lemont Tap Water
Lemont's water record shows 1 contaminant above EPA MCLGs, 7 contaminants with an EPA health goal detected in some samples (no level on file) and an EPA lead 90th percentile above the 15 ppb action level. We strongly recommend using a certified water filter to reduce exposure to these contaminants. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lemont's water.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach LEMONT. For a problem with your water now (discolored water, no water, low pressure, a leak), contact LEMONT directly.
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