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Tap water quality report

Centralia, IL

EPA monitoring detected 21 contaminants across the 3 water suppliers serving Centralia. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

3
water suppliers
15,529
people served
21
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Centralia'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
Nitrate
1900 µg/L 19%
of the EPA limit 10000 µg/L
 1/3 SYR4
Nitrate-Nitrite
1900 µg/L 19%
of the EPA limit 10000 µg/L
 1/3 SYR4
Fluoride
1140 µg/L 28%
of the EPA limit 4000 µg/L
 1/3 SYR4
Copper
700 µg/L 54%
of the EPA limit 1300 µg/L
 2/3 SYR4
TTHM
88.78 µg/L 111%
of the EPA limit, in the worst sample — 80 µg/L
 2/3 SYR4
Total Haloacetic Acids (HAA5)
78.4 µg/L 131%
of the EPA limit, in the worst sample — 60 µg/L
 2/3 SYR4
Chloroform
70.89 µg/L
No EPA limit set
 2/3 SYR4
Barium
57 µg/L 2.9%
of the EPA limit 2000 µg/L
 1/3 SYR4
Trichloroacetic Acid
49.6 µg/L
No EPA limit set
 2/3 SYR4
Dichloroacetic Acid
31.8 µg/L
No EPA limit set
 2/3 SYR4
Monobromoacetic Acid
22.9 µg/L
No EPA limit set
 2/3 SYR4
Bromodichloromethane
16.2 µg/L
No EPA limit set
 2/3 SYR4
Lead
16 µg/L 107%
of the EPA limit, in the worst sample — 15 µg/L
 2/3 SYR4
Dibromochloromethane
5.783 µg/L
No EPA limit set
 2/3 SYR4
Monochloroacetic Acid
3.85 µg/L
No EPA limit set
 1/3 SYR4
Dibromoacetic Acid
3.5 µg/L
No EPA limit set
 2/3 SYR4
Bromoform
1.823 µg/L
No EPA limit set
 1/3 SYR4
Arsenic
1.8 µg/L 18%
of the EPA limit 10 µg/L
 1/3 SYR4
Simazine
1.6 µg/L 40%
of the EPA limit 4 µg/L
 1/3 SYR4
Atrazine
1.4 µg/L 47%
of the EPA limit 3 µg/L
 1/3 SYR4
Lead
0.0033 mg/L 22%
of the EPA limit 0.0150 mg/L
 2/3 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 Centralia

SupplierPopulation served
CENTRALIA 12,182
CLINTON COUNTY EAST PWD 1,950
CENTRALIA CORRECTIONAL SITE 1,397

Frequently asked questions about Centralia tap water

Is Centralia tap water safe to drink?

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

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

What contaminants are in Centralia's water?

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