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Tap water quality report

Romeoville, IL

EPA monitoring detected 26 contaminants across the 1 water supplier serving Romeoville. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
50,458
people served
26
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Romeoville'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.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
1232 µg/L 31%
of the EPA limit 4000 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2017
1/1 SYR4
Nitrate
853.05 µg/L 8.5%
of the EPA limit 10000 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Nitrate-Nitrite
774.2 µg/L 7.7%
of the EPA limit 10000 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2016
1/1 SYR4
Copper
311.15 µg/L 24%
of the EPA limit 1300 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2018
1/1 SYR4
Barium
132.4 µg/L 6.6%
of the EPA limit 2000 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2017
1/1 SYR4
Lithium
54.6 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2025
1/1 UCMR-5
TTHM
34 µg/L 43%
of the EPA limit 80 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Lead
24.21 µg/L 161%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2018
1/1 SYR4
Dibromochloromethane
13.3 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Bromodichloromethane
9.315 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
8.185 µg/L 14%
of the EPA limit 60 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Bromoform
7.185 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Dibromoacetic Acid
4.2165 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Chloroform
4.2015 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
4.05 pCi/L 81%
of the EPA limit 5 pCi/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Xylenes, Total
3.401 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Monobromoacetic Acid
3.393 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Dichloroacetic Acid
2.971 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.68 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.658 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Arsenic
1.1842 µg/L 12%
of the EPA limit 10 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2017
1/1 SYR4
Ethylbenzene
0.5600 µg/L 0.1%
of the EPA limit 700 µg/L
Main supplier: ROMEOVILLE · 50,458 people · 2019
1/1 SYR4
Pfpea
0.0212 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2025
1/1 UCMR-5
Pfhxa
0.0118 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2025
1/1 UCMR-5
Pfba
0.0089 µg/L
No EPA limit set
Main supplier: ROMEOVILLE · 50,458 people · 2025
1/1 UCMR-5
Lead
0.0082 mg/L 55%
of the EPA limit 0.0150 mg/L
Main supplier: ROMEOVILLE · 50,458 people · 2025
1/1 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 Romeoville

SupplierPopulation served
ROMEOVILLE 50,458

Frequently asked questions about Romeoville tap water

Is Romeoville tap water safe to drink?

EPA testing detected 26 contaminants in the water serving Romeoville. 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 Romeoville?

1 public water supplier report drinking-water monitoring for Romeoville, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Romeoville's water?

The contaminants EPA monitoring detected in Romeoville include Fluoride, Nitrate, Nitrate-Nitrite, Copper, 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.