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Tap water quality report

Centralia

EPA monitoring tested this supplier for 108 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
21
detected
12,182
people served
0
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Surface water
Ownership
Local government
Counties served
Marion

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.

0
health-based violations
9
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2024-07-11
Other Monitoring Resolved 2024-07-11
MR Monitoring Resolved 2023-04-01 → 2023-06-30
MR Monitoring Resolved 2023-04-01 → 2023-06-30
MR Monitoring Resolved 2023-04-01 → 2023-06-30
MR Monitoring Resolved 2023-04-01 → 2023-06-30
MR Monitoring Resolved 2016-07-01 → 2016-09-30
MR Monitoring Resolved 2016-07-01 → 2016-09-30
MR Monitoring Archived 1977-06-30 → 1981-06-29

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
13 µg/L
No EPA limit set
 128/128 SYR4 2012–2019
Chloroform
66 µg/L
No EPA limit set
 128/128 SYR4 2012–2019
TTHM
79 µg/L 99%
of the EPA limit 80 µg/L
 128/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
42.9 µg/L 72%
of the EPA limit 60 µg/L
 128/128 SYR4 2012–2019
Dibromochloromethane
5.783 µg/L
No EPA limit set
 126/128 SYR4 2012–2019
Dichloroacetic Acid
17.6 µg/L
No EPA limit set
 120/128 SYR4 2012–2019
Trichloroacetic Acid
19.2 µg/L
No EPA limit set
 115/128 SYR4 2012–2019
Copper
700 µg/L 54%
of the EPA limit 1300 µg/L
 90/90 SYR4 2012–2018
Dibromoacetic Acid
3.5 µg/L
No EPA limit set
 34/128 SYR4 2012–2019
Monobromoacetic Acid
22.9 µg/L
No EPA limit set
 33/128 SYR4 2012–2019
Lead
6.3 µg/L 42%
of the EPA limit 15 µg/L
 30/90 SYR4 2012–2018
Lead
0.0033 mg/L 22%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Nitrate
1900 µg/L 19%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Atrazine
1.4 µg/L 47%
of the EPA limit 3 µg/L
 12/33 SYR4 2012–2019
Simazine
1.6 µg/L 40%
of the EPA limit 4 µg/L
 10/33 SYR4 2012–2019
Barium
57 µg/L 2.9%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Fluoride
1140 µg/L 28%
of the EPA limit 4000 µg/L
 8/8 SYR4 2012–2019
Bromoform
1.823 µg/L
No EPA limit set
 4/128 SYR4 2012–2019
Monochloroacetic Acid
3.85 µg/L
No EPA limit set
 4/128 SYR4 2012–2019
Nitrate-Nitrite
1900 µg/L 19%
of the EPA limit 10000 µg/L
 3/3 SYR4 2012–2018
Arsenic
1.8 µg/L 18%
of the EPA limit 10 µg/L
 1/8 SYR4 2012–2019
87 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MAHLE, GALEN
Phone
618-533-7623
Email
gmahle@cityofcentralia.org

Frequently asked questions about Centralia

Is Centralia tap water safe to drink?

EPA monitoring detected 21 contaminants in Centralia'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 Centralia's water?

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

How many people does Centralia serve?

Centralia reports serving 12,182 people in Illinois, per its EPA record.

Has Centralia had any water quality violations?

The EPA has 9 violations on file for Centralia, of which 0 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.