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Water Quality Report

Mattoon, IL

Coles County · 20,220 residents · 2 water systems

10

Contaminants detected

1

PFAS compounds

100

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Mattoon drinking water comes from a mix of groundwater and surface water sources. Based on the most recent monitoring data, 10 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Total Trihalomethanes, and 6 others. PFAS compounds have been detected at trace levels in Mattoon water. Water hardness is 100 mg/L (moderately hard), which is within a typical range for the region.

Contaminants detected in Mattoon water

Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.

Lead0 / 0.015 mg/L
0% of EPA limit
Nitrate0.47 / 10 mg/L
5% of EPA limit
Copper28 / 1300 ug/L
2% of EPA limit
Total Trihalomethanes26.6 / 80 ug/L
33% of EPA limit
40% of EPA limit
Atrazine0.43 / 3 ug/L
14% of EPA limit
Barium0.015 / 2 mg/L
1% of EPA limit
Fluoride0.584 / 4 mg/L
15% of EPA limit
Toc8.6 mg/L
Unregulated
PFBA (Perfluorobutanoic Acid)0.0067 ug/L
UnregulatedPFAS
PFAS (1 compounds detected)
Microplastics (not routinely tested)

Other cities in Coles County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Mattoon, IL tap water safe to drink?
Mattoon tap water meets EPA legal standards (Maximum Contaminant Levels). However, 1 contaminant is present above independent health guidelines, which are often stricter than legal limits. 10 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). View the detailed report for each water system to see specific levels and how they compare to both legal limits and health guidelines.
What contaminants are in Mattoon water?
Monitoring has detected 10 contaminants in Mattoon's water supply: Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Barium, Fluoride, Toc, PFBA (Perfluorobutanoic Acid). Additionally, 1 PFAS compounds have been detected at trace levels. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Mattoon water have PFAS?
Yes. 1 PFAS compounds have been detected in Mattoon's water supply at trace levels. PFAS are sometimes called "forever chemicals" because they do not break down in the environment. The EPA has set Maximum Contaminant Levels for several PFAS compounds. View the detailed report for specific concentrations.
Where does Mattoon get its drinking water?
Mattoon's drinking water comes from a combination of groundwater and surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Mattoon is served by 2 water systems, the largest being MATTOON (serving 19,500 people).

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