Tap WaterIndex

← Illinois

Tap water quality report

Elgin, IL

EPA monitoring detected 25 contaminants across the 2 water suppliers serving Elgin. 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.

2
water suppliers
115,717
people served
25
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Elgin'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
Nitrate
2250 µg/L 23%
of the EPA limit 10000 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Nitrate-Nitrite
1264.5 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: ELGIN · 114,797 people · 2016
1/2 SYR4
Fluoride
1108.5 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Barium
488.75 µg/L 24%
of the EPA limit 2000 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Copper
220.75 µg/L 17%
of the EPA limit 1300 µg/L
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
TTHM
83.685 µg/L 105%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Chloroform
56.48 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
44.365 µg/L 74%
of the EPA limit 60 µg/L
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Trichloroacetic Acid
22.79 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Dichloroacetic Acid
22.38 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Lead
21.845 µg/L 146%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Bromodichloromethane
21 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Lithium
19.3 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2025
1/2 UCMR-5
Monochloroacetic Acid
8.579 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Dibromochloromethane
7.6985 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Bromoform
2.696 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.429 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
2/2 SYR4
Monobromoacetic Acid
2.008 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Arsenic
1.269 µg/L 13%
of the EPA limit 10 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
0.7700 pCi/L 15%
of the EPA limit 5 pCi/L
Main supplier: ELGIN · 114,797 people · 2014
1/2 SYR4
Dalapon
0.6850 µg/L 0.3%
of the EPA limit 200 µg/L
Main supplier: ELGIN · 114,797 people · 2019
1/2 SYR4
Lead
0.0530 mg/L 353%
above the EPA limit of 0.0150 mg/L
Main supplier: ELGIN · 114,797 people · 2025
2/2 LCR
Pfba
0.0076 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2025
2/2 UCMR-5
Pfpea
0.0041 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2025
Highest in the city: 0.0053 µg/L — WILLOW LAKE ESTATES MHP · 920 people · 2025
2/2 UCMR-5
Pfhxa
0.0038 µg/L
No EPA limit set
Main supplier: ELGIN · 114,797 people · 2025
2/2 UCMR-5
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 Elgin

SupplierPopulation served
ELGIN 114,797
WILLOW LAKE ESTATES MHP 920

Frequently asked questions about Elgin tap water

Is Elgin tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Elgin. 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 Elgin?

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

What contaminants are in Elgin's water?

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