Is Marseilles, IL Tap Water Safe? Quality & Contaminants

What was found in Marseilles's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Fluoride	1184 µg/L 30% of the EPA limit 4000 µg/L Main supplier: MARSEILLES · 5,061 people · 2017	3/3	SYR4
Nitrate	50 µg/L 0.5% of the EPA limit 10000 µg/L Main supplier: MARSEILLES · 5,061 people · 2019 Highest in the city: 729 µg/L — FOUR STAR CAMPGROUND · 250 people · 2019	3/3	SYR4
Copper	710.5 µg/L 55% of the EPA limit 1300 µg/L Main supplier: MARSEILLES · 5,061 people · 2017	2/3	SYR4
Nitrate-Nitrite	514 µg/L 5.1% of the EPA limit 10000 µg/L Highest in the city: IL PRAIRIE ESTATE SBDV WATER ASSOCIATION · 78 people · 2019	1/3	SYR4
Barium	70 µg/L 3.5% of the EPA limit 2000 µg/L Main supplier: MARSEILLES · 5,061 people · 2017	3/3	SYR4
Gross Alpha, Excl. Radon And U	62.8 pCi/L 419% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: FOUR STAR CAMPGROUND · 250 people · 2013	1/3	SYR4
Lithium	42 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2023	1/3	UCMR-5
TTHM	38.13 µg/L 48% of the EPA limit 80 µg/L Main supplier: MARSEILLES · 5,061 people · 2019	2/3	SYR4
Bromoform	17.975 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2019	1/3	SYR4
Dibromochloromethane	14.515 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2019	1/3	SYR4
Combined Radium (-226 And -228)	3.37 pCi/L 67% of the EPA limit 5 pCi/L Main supplier: MARSEILLES · 5,061 people · 2019 Highest in the city: 9.684 pCi/L — FOUR STAR CAMPGROUND · 250 people · 2019	3/3	SYR4
Lead	7.175 µg/L 48% of the EPA limit 15 µg/L Main supplier: MARSEILLES · 5,061 people · 2017 Highest in the city: 8.71 µg/L — FOUR STAR CAMPGROUND · 250 people · 2018	3/3	SYR4
Chloroform	1.486 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2019 Highest in the city: 8.65 µg/L — IL PRAIRIE ESTATE SBDV WATER ASSOCIATION · 78 people · 2017	2/3	SYR4
Dibromoacetic Acid	6 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2019	1/3	SYR4
Total Haloacetic Acids (HAA5)	6 µg/L 10% of the EPA limit 60 µg/L Main supplier: MARSEILLES · 5,061 people · 2019	2/3	SYR4
Selenium	4.885 µg/L 9.8% of the EPA limit 50 µg/L Main supplier: MARSEILLES · 5,061 people · 2017	1/3	SYR4
Bromodichloromethane	4.8235 µg/L No EPA limit set Main supplier: MARSEILLES · 5,061 people · 2019	1/3	SYR4
Arsenic	1.97 µg/L 20% of the EPA limit 10 µg/L Main supplier: MARSEILLES · 5,061 people · 2017	1/3	SYR4
Dichloroacetic Acid	0.6250 µg/L No EPA limit set Highest in the city: FOUR STAR CAMPGROUND · 250 people · 2019	1/3	SYR4
Combined Uranium	0.1490 µg/L 0.5% of the EPA limit 30 µg/L Highest in the city: FOUR STAR CAMPGROUND · 250 people · 2013	1/3	SYR4
Lead	0.0191 mg/L 127% above the EPA limit of 0.0150 mg/L Main supplier: MARSEILLES · 5,061 people · 2025	3/3	LCR

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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Marseilles

Supplier	Population served
MARSEILLES	5,061
FOUR STAR CAMPGROUND	250
IL PRAIRIE ESTATE SBDV WATER ASSOCIATION	78

Frequently asked questions about Marseilles tap water

Is Marseilles tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Marseilles. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Marseilles?

3 public water suppliers report drinking-water monitoring for Marseilles, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Marseilles's water?

The contaminants EPA monitoring detected in Marseilles include Fluoride, Nitrate, Copper, Nitrate-Nitrite, Barium. The full list, with the level at the main supplier and the data source, is in the table above.

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.