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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 highest level found 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 highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
 1/1 SYR4
Copper
700 µg/L 54%
of the EPA limit 1300 µg/L
 1/1 SYR4
Nitrate
510 µg/L 5.1%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate-Nitrite
320 µg/L 3.2%
of the EPA limit 10000 µg/L
 1/1 SYR4
TTHM
101 µg/L 126%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Chloroform
81.7 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
64 µg/L 107%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
Dichloroacetic Acid
34.1 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
25 µg/L
No EPA limit set
 1/1 SYR4
Barium
23 µg/L 1.2%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromodichloromethane
16 µg/L
No EPA limit set
 1/1 SYR4
Monobromoacetic Acid
8.6 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
4.93 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
4.516 µg/L
No EPA limit set
 1/1 SYR4
Lead
4.1 µg/L 27%
of the EPA limit 15 µg/L
 1/1 SYR4
2,4-D
3.8 µg/L 5.4%
of the EPA limit 70 µg/L
 1/1 SYR4
Simazine
3 µg/L 75%
of the EPA limit 4 µg/L
 1/1 SYR4
Di(2-ethylhexyl) Phthalate
2.4 µg/L 40%
of the EPA limit 6 µg/L
 1/1 SYR4
Combined Radium (-226 And -228)
0.7140 pCi/L 14%
of the EPA limit 5 pCi/L
 1/1 SYR4
Arsenic
0.6200 µg/L 6.2%
of the EPA limit 10 µg/L
 1/1 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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, Copper, Nitrate, Nitrate-Nitrite, TTHM. The full list, with the highest level found 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.