Is Centralia Tap Water Safe? Quality Report

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
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 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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Bromodichloromethane	11.065 µg/L No EPA limit set worst single sample: 13 µg/L	128/128	SYR4	2012–2019
Chloroform	53.5275 µg/L No EPA limit set worst single sample: 66 µg/L	128/128	SYR4	2012–2019
TTHM	68.929 µg/L 86% of the EPA limit 80 µg/L worst single sample: 79 µg/L	128/128	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	28.52 µg/L 48% of the EPA limit 60 µg/L worst single sample: 42.9 µg/L	128/128	SYR4	2012–2019
Dibromochloromethane	4.6695 µg/L No EPA limit set worst single sample: 5.783 µg/L	126/128	SYR4	2012–2019
Dichloroacetic Acid	15.15 µg/L No EPA limit set worst single sample: 17.6 µg/L	120/128	SYR4	2012–2019
Trichloroacetic Acid	11 µg/L No EPA limit set worst single sample: 19.2 µg/L	115/128	SYR4	2012–2019
Copper	461 µg/L 35% of the EPA limit 1300 µg/L worst single sample: 700 µg/L	90/90	SYR4	2012–2018
Dibromoacetic Acid	2.775 µg/L No EPA limit set worst single sample: 3.5 µg/L	34/128	SYR4	2012–2019
Monobromoacetic Acid	20.4 µg/L No EPA limit set worst single sample: 22.9 µg/L	33/128	SYR4	2012–2019
Lead	3.92 µg/L 26% of the EPA limit 15 µg/L worst single sample: 6.3 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	1.103 µg/L 37% of the EPA limit 3 µg/L worst single sample: 1.4 µg/L	12/33	SYR4	2012–2019
Simazine	1.42 µg/L 36% of the EPA limit 4 µg/L worst single sample: 1.6 µg/L	10/33	SYR4	2012–2019
Barium	55.95 µg/L 2.8% of the EPA limit 2000 µg/L worst single sample: 57 µg/L	8/8	SYR4	2012–2019
Fluoride	1119 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1140 µg/L	8/8	SYR4	2012–2019
Bromoform	1.8173 µg/L No EPA limit set worst single sample: 1.823 µg/L	4/128	SYR4	2012–2019
Monochloroacetic Acid	3.8245 µg/L No EPA limit set worst single sample: 3.85 µg/L	4/128	SYR4	2012–2019
Nitrate-Nitrite	1810 µg/L 18% of the EPA limit 10000 µg/L worst single sample: 1900 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: [email protected]

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.