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Tap water quality report

Caseyville, IL

EPA monitoring detected 15 contaminants across the 1 water supplier serving Caseyville. 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.

1
water supplier
13,798
people served
15
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Caseyville'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
791.5 µg/L 61%
of the EPA limit 1300 µg/L
Main supplier: CASEYVILLE · 13,798 people · 2017
1/1 SYR4
TTHM
48.7 µg/L 61%
of the EPA limit 80 µg/L
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Chloroform
39.495 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
29.26999999999999 µg/L 49%
of the EPA limit 60 µg/L
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Lithium
25.5 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2025
1/1 UCMR-5
Dichloroacetic Acid
18.575 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Lead
13.830499999999997 µg/L 92%
of the EPA limit 15 µg/L
Main supplier: CASEYVILLE · 13,798 people · 2017
1/1 SYR4
Trichloroacetic Acid
9.819999999999999 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Bromodichloromethane
8.684999999999992 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Monobromoacetic Acid
6.83 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.135 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Dibromochloromethane
3.5 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.27 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2019
1/1 SYR4
Pfba
0.0122 µg/L
No EPA limit set
Main supplier: CASEYVILLE · 13,798 people · 2025
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CASEYVILLE · 13,798 people · 2025
1/1 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 Caseyville

SupplierPopulation served
CASEYVILLE 13,798

Frequently asked questions about Caseyville tap water

Is Caseyville tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Caseyville. 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 Caseyville?

1 public water supplier report drinking-water monitoring for Caseyville, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Caseyville's water?

The contaminants EPA monitoring detected in Caseyville include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Lithium. 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.