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Tap water quality report

Colfax, IL

EPA monitoring detected 15 contaminants across the 1 water supplier serving Colfax. 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
989
people served
15
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Colfax'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
968.9 µg/L 24%
of the EPA limit 4000 µg/L
Main supplier: COLFAX · 989 people · 2018
1/1 SYR4
Copper
475.3 µg/L 37%
of the EPA limit 1300 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Barium
184 µg/L 9.2%
of the EPA limit 2000 µg/L
Main supplier: COLFAX · 989 people · 2018
1/1 SYR4
Lead
44.81 µg/L 299%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
18.655 µg/L 31%
of the EPA limit 60 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
TTHM
14.975 µg/L 19%
of the EPA limit 80 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Dichloroacetic Acid
14.805 µg/L
No EPA limit set
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Chloroform
14.195 µg/L
No EPA limit set
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Trichloroacetic Acid
5.02 µg/L
No EPA limit set
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.885 µg/L
No EPA limit set
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
2.1 pCi/L 42%
of the EPA limit 5 pCi/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Xylenes, Total
1.363 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Bromodichloromethane
1.2 µg/L
No EPA limit set
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Carbon Tetrachloride
0.5300 µg/L 11%
of the EPA limit 5 µg/L
Main supplier: COLFAX · 989 people · 2019
1/1 SYR4
Lead
0.0107 mg/L 71%
of the EPA limit 0.0150 mg/L
Main supplier: COLFAX · 989 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 Colfax

SupplierPopulation served
COLFAX 989

Frequently asked questions about Colfax tap water

Is Colfax tap water safe to drink?

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

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

What contaminants are in Colfax's water?

The contaminants EPA monitoring detected in Colfax include Fluoride, Copper, Barium, Lead, Total Haloacetic Acids (HAA5). 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.