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Tap water quality report

Westmont, IL

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Westmont. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
25,111
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Westmont's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
649.5 µg/L 50%
of the EPA limit 1300 µg/L
Main supplier: WESTMONT · 24,161 people · 2017
Highest in the city: 728.0000000000013 µg/L — LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2017
2/2 SYR4
Fluoride
661.4 µg/L 17%
of the EPA limit 4000 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2018
1/2 SYR4
Lead
13.544999999999998 µg/L 90%
of the EPA limit 15 µg/L
Main supplier: WESTMONT · 24,161 people · 2017
Highest in the city: 105.69999999999999 µg/L — LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2017
2/2 SYR4
Barium
57.8 µg/L 2.9%
of the EPA limit 2000 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2018
1/2 SYR4
TTHM
49.02999999999999 µg/L 61%
of the EPA limit 80 µg/L
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Nitrate
40 µg/L 0.4%
of the EPA limit 10000 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2019
1/2 SYR4
Nitrate-Nitrite
39.5 µg/L 0.4%
of the EPA limit 10000 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2018
1/2 SYR4
Chloroform
29.469999999999995 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
25.799999999999994 µg/L 43%
of the EPA limit 60 µg/L
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Bromodichloromethane
13.339999999999991 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Dichloroacetic Acid
11.799999999999994 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Trichloroacetic Acid
11.549999999999997 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
1/2 SYR4
Dibromochloromethane
6.672999999999999 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Chromium
6.3 µg/L 6.3%
of the EPA limit 100 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2018
1/2 SYR4
Monochloroacetic Acid
3.8745 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
1/2 SYR4
Arsenic
1.89 µg/L 19%
of the EPA limit 10 µg/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2018
1/2 SYR4
Monobromoacetic Acid
1.79 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
1/2 SYR4
Dibromoacetic Acid
1.4705 µg/L
No EPA limit set
Main supplier: WESTMONT · 24,161 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
1.133 pCi/L 23%
of the EPA limit 5 pCi/L
Highest in the city: LIBERTY PARK HOMEOWNERS ASSOCIATION · 950 people · 2014
1/2 SYR4
Lead
0.0083 mg/L 55%
of the EPA limit 0.0150 mg/L
Main supplier: WESTMONT · 24,161 people · 2025
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Westmont

SupplierPopulation served
WESTMONT 24,161
LIBERTY PARK HOMEOWNERS ASSOCIATION 950

Frequently asked questions about Westmont tap water

Is Westmont tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Westmont. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Westmont?

2 public water suppliers report drinking-water monitoring for Westmont, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Westmont's water?

The contaminants EPA monitoring detected in Westmont include Copper, Fluoride, Lead, Barium, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.