Is Marseilles Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: LaSalle

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.

113

health-based violations

132

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2024-10-17
TT	Health-based	Unaddressed	2024-10-17
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-07-01 → 2009-09-30

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
Copper	710.5 µg/L 55% of the EPA limit 1300 µg/L worst single sample: 810 µg/L	40/40	SYR4	2014–2017
Lead	0.0191 mg/L 127% above the EPA limit of 0.0150 mg/L	18/18	LCR	2025
Lead	7.175 µg/L 48% of the EPA limit 15 µg/L worst single sample: 9.5 µg/L	16/40	SYR4	2014–2017
Nitrate	50 µg/L 0.5% of the EPA limit 10000 µg/L	14/32	SYR4	2012–2019
Combined Radium (-226 And -228)	3.37 pCi/L 67% of the EPA limit 5 pCi/L worst single sample: 3.43 pCi/L	11/15	SYR4	2012–2019
Bromodichloromethane	4.8235 µg/L No EPA limit set worst single sample: 4.89 µg/L	8/8	SYR4	2013–2019
Bromoform	17.975 µg/L No EPA limit set worst single sample: 18.5 µg/L	8/8	SYR4	2013–2019
Dibromoacetic Acid	6 µg/L No EPA limit set worst single sample: 6.7 µg/L	8/8	SYR4	2013–2019
Dibromochloromethane	14.515 µg/L No EPA limit set worst single sample: 14.9 µg/L	8/8	SYR4	2013–2019
TTHM	38.13 µg/L 48% of the EPA limit 80 µg/L worst single sample: 38.2 µg/L	8/8	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	6 µg/L 10% of the EPA limit 60 µg/L worst single sample: 6.7 µg/L	8/8	SYR4	2013–2019
Chloroform	1.486 µg/L No EPA limit set worst single sample: 1.6 µg/L	7/8	SYR4	2013–2019
Arsenic	1.97 µg/L 20% of the EPA limit 10 µg/L worst single sample: 2 µg/L	4/4	SYR4	2014–2017
Barium	70 µg/L 3.5% of the EPA limit 2000 µg/L	4/4	SYR4	2014–2017
Fluoride	1184 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1190 µg/L	4/4	SYR4	2014–2017
Lithium	42 µg/L No EPA limit set	4/4	UCMR-5	2023
Selenium	4.885 µg/L 9.8% of the EPA limit 50 µg/L worst single sample: 5 µg/L	2/4	SYR4	2014–2017

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDichloroacetic AcidEthylbenzeneHfpo-DaMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitrate-NitriteNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Marseilles

Is Marseilles tap water safe to drink?

EPA monitoring detected 17 contaminants in Marseilles'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 Marseilles's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate, Combined Radium (-226 And -228), and others. The full list with the level and data source for each is above.

How many people does Marseilles serve?

Marseilles reports serving 5,061 people, per its EPA record.

Has Marseilles had any water quality violations?

The EPA has 132 violations on file for Marseilles, of which 113 are health-based (a contaminant limit or required treatment was breached) and 5 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.