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Tap water quality report

Coulterville, IL

EPA monitoring detected 21 contaminants across the 1 water supplier serving Coulterville. 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
1,052
people served
21
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Coulterville'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
Fluoride
1075.5 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Nitrate
510 µg/L 5.1%
of the EPA limit 10000 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Copper
325 µg/L 25%
of the EPA limit 1300 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Nitrate-Nitrite
314 µg/L 3.1%
of the EPA limit 10000 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2018
1/1 SYR4
TTHM
83.642 µg/L 105%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Chloroform
71.555 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
55.525 µg/L 93%
of the EPA limit 60 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Dichloroacetic Acid
30.595 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Trichloroacetic Acid
23.14 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Barium
22.65 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Bromodichloromethane
10.848 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Monobromoacetic Acid
8.363 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.768 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
2,4-D
3.745 µg/L 5.4%
of the EPA limit 70 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Dibromochloromethane
3.2461 µg/L
No EPA limit set
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Lead
3.245 µg/L 22%
of the EPA limit 15 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Simazine
2.8935 µg/L 72%
of the EPA limit 4 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
2.4 µg/L 40%
of the EPA limit 6 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.7140 pCi/L 14%
of the EPA limit 5 pCi/L
Main supplier: COULTERVILLE · 1,052 people · 2014
1/1 SYR4
Arsenic
0.6200 µg/L 6.2%
of the EPA limit 10 µg/L
Main supplier: COULTERVILLE · 1,052 people · 2019
1/1 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: COULTERVILLE · 1,052 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 Coulterville

SupplierPopulation served
COULTERVILLE 1,052

Frequently asked questions about Coulterville tap water

Is Coulterville tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Coulterville. 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 Coulterville?

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

What contaminants are in Coulterville's water?

The contaminants EPA monitoring detected in Coulterville include Fluoride, Nitrate, Copper, Nitrate-Nitrite, 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.