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Tap water quality report

Mattoon

EPA monitoring tested this supplier for 108 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
22
detected
19,500
people served
31
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Surface water
Ownership
Local government
Counties served
Coles

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

31
health-based violations
55
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Archived 1998-12-01 → 1998-12-31
TT Health-based Archived 1998-12-01 → 1998-12-31
TT Health-based Archived 1998-12-01 → 1998-12-31
MCL Health-based Archived 1998-02-01 → 1998-02-28
MCL Health-based Archived 1998-02-01 → 1998-02-28
TT Health-based Archived 1996-12-01 → 1996-12-31
TT Health-based Archived 1996-12-01 → 1996-12-31
TT Health-based Archived 1996-12-01 → 1996-12-31
TT Health-based Archived 1996-11-01 → 1996-11-30
TT Health-based Archived 1996-11-01 → 1996-11-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0067 µg/L 1/4 2025

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
8.7896 µg/L
No EPA limit set
worst single sample: 11.54 µg/L
107/107 SYR4 2012–2019
Chloroform
72.21 µg/L
No EPA limit set
worst single sample: 84.52 µg/L
107/107 SYR4 2012–2019
TTHM
80.7 µg/L 101%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 99.39 µg/L
107/107 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
37.725 µg/L 63%
of the EPA limit 60 µg/L
worst single sample: 42 µg/L
106/107 SYR4 2012–2019
Trichloroacetic Acid
8.175 µg/L
No EPA limit set
worst single sample: 10.2 µg/L
106/107 SYR4 2012–2019
Dichloroacetic Acid
28.44 µg/L
No EPA limit set
worst single sample: 34 µg/L
105/107 SYR4 2012–2019
Dibromochloromethane
3.4681 µg/L
No EPA limit set
worst single sample: 5.298 µg/L
95/107 SYR4 2012–2019
Copper
91.55 µg/L 7%
of the EPA limit 1300 µg/L
worst single sample: 250 µg/L
58/60 SYR4 2014–2017
Nitrate
6700 µg/L 67%
of the EPA limit 10000 µg/L
worst single sample: 7900 µg/L
58/64 SYR4 2012–2019
Lead
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
 21/21 LCR 2025
Monochloroacetic Acid
5.543 µg/L
No EPA limit set
worst single sample: 6.06 µg/L
12/107 SYR4 2012–2019
Monobromoacetic Acid
11.25 µg/L
No EPA limit set
worst single sample: 11.9 µg/L
11/107 SYR4 2012–2019
Atrazine
1.44 µg/L 48%
of the EPA limit 3 µg/L
worst single sample: 1.6 µg/L
9/26 SYR4 2012–2019
Barium
26.55 µg/L 1.3%
of the EPA limit 2000 µg/L
worst single sample: 29 µg/L
8/8 SYR4 2012–2019
Fluoride
1034.8 µg/L 26%
of the EPA limit 4000 µg/L
worst single sample: 1060 µg/L
8/8 SYR4 2012–2019
Simazine
1.27 µg/L 32%
of the EPA limit 4 µg/L
worst single sample: 1.3 µg/L
7/29 SYR4 2012–2019
Nitrate-Nitrite
5290 µg/L 53%
of the EPA limit 10000 µg/L
worst single sample: 5300 µg/L
3/3 SYR4 2012–2018
Arsenic
1.59 µg/L 16%
of the EPA limit 10 µg/L
worst single sample: 1.6 µg/L
2/8 SYR4 2012–2019
Lead
32.36 µg/L 216%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 34 µg/L
2/60 SYR4 2014–2017
Combined Radium (-226 And -228)
0.7380 pCi/L 15%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Dibromoacetic Acid
1 µg/L
No EPA limit set
 1/107 SYR4 2012–2019
86 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CLARK, DAVID
Phone
217-235-5460
Email
[email protected]

Frequently asked questions about Mattoon

Is Mattoon tap water safe to drink?

EPA monitoring detected 22 contaminants in Mattoon's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Mattoon's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Mattoon serve?

Mattoon reports serving 19,500 people in Illinois, per its EPA record.

Has Mattoon had any water quality violations?

The EPA has 55 violations on file for Mattoon, of which 31 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.