Tap WaterIndex

← Illinois

Tap water quality report

Mathersville, IL

EPA monitoring detected 20 contaminants across the 1 water supplier serving Mathersville. 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
651
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Mathersville'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
1666.5 µg/L 42%
of the EPA limit 4000 µg/L
Main supplier: MATHERVILLE · 651 people · 2017
1/1 SYR4
Copper
175.5 µg/L 14%
of the EPA limit 1300 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Nitrate
160 µg/L 1.6%
of the EPA limit 10000 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Nitrate-Nitrite
26 µg/L 0.3%
of the EPA limit 10000 µg/L
Main supplier: MATHERVILLE · 651 people · 2015
1/1 SYR4
Nitrite
26 µg/L 2.6%
of the EPA limit 1000 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Barium
14.95 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: MATHERVILLE · 651 people · 2017
1/1 SYR4
Chromium
9.9 µg/L 9.9%
of the EPA limit 100 µg/L
Main supplier: MATHERVILLE · 651 people · 2017
1/1 SYR4
Selenium
8.1 µg/L 16%
of the EPA limit 50 µg/L
Main supplier: MATHERVILLE · 651 people · 2017
1/1 SYR4
Arsenic
6.285 µg/L 63%
of the EPA limit 10 µg/L
Main supplier: MATHERVILLE · 651 people · 2017
1/1 SYR4
TTHM
4.3566 µg/L 5.4%
of the EPA limit 80 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Trichloroacetic Acid
3.8 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
3.734 µg/L 6.2%
of the EPA limit 60 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.14 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Lead
2.26 µg/L 15%
of the EPA limit 15 µg/L
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Bromodichloromethane
2.2 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.84 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.759 pCi/L 35%
of the EPA limit 5 pCi/L
Main supplier: MATHERVILLE · 651 people · 2015
1/1 SYR4
Chloroform
1.6299 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Dibromochloromethane
0.7470 µg/L
No EPA limit set
Main supplier: MATHERVILLE · 651 people · 2019
1/1 SYR4
Lead
0.0116 mg/L 77%
of the EPA limit 0.0150 mg/L
Main supplier: MATHERVILLE · 651 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 Mathersville

SupplierPopulation served
MATHERVILLE 651

Frequently asked questions about Mathersville tap water

Is Mathersville tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Mathersville. 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 Mathersville?

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

What contaminants are in Mathersville's water?

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