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Tap water quality report

Lake in the Hills, IL

EPA monitoring detected 19 contaminants across the 1 water supplier serving Lake in the Hills. 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
28,661
people served
19
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Lake in the Hills'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
Copper
1505 µg/L 116%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2017
1/1 SYR4
Barium
1380 µg/L 69%
of the EPA limit 2000 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Fluoride
1086 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2018
1/1 SYR4
TTHM
38.3115 µg/L 48%
of the EPA limit 80 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
26.5 µg/L 44%
of the EPA limit 60 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Chloroform
25.762 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Dichloroacetic Acid
13.07 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Trichloroacetic Acid
13.01 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Lithium
10.8 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2025
1/1 UCMR-5
Bromodichloromethane
10.4035 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Dibromochloromethane
7.9464 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Chromium
5.2 µg/L 5.2%
of the EPA limit 100 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2018
1/1 SYR4
Lead
4.19 µg/L 28%
of the EPA limit 15 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2017
1/1 SYR4
Dibromoacetic Acid
3.17 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
3.0415 pCi/L 61%
of the EPA limit 5 pCi/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Bromoform
1.935 µg/L
No EPA limit set
Main supplier: LAKE IN THE HILLS · 28,661 people · 2019
1/1 SYR4
Arsenic
1.56 µg/L 16%
of the EPA limit 10 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2018
1/1 SYR4
Cadmium
1 µg/L 20%
of the EPA limit 5 µg/L
Main supplier: LAKE IN THE HILLS · 28,661 people · 2018
1/1 SYR4
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
Main supplier: LAKE IN THE HILLS · 28,661 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 Lake in the Hills

SupplierPopulation served
LAKE IN THE HILLS 28,661

Frequently asked questions about Lake in the Hills tap water

Is Lake in the Hills tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Lake in the Hills. 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 Lake in the Hills?

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

What contaminants are in Lake in the Hills's water?

The contaminants EPA monitoring detected in Lake in the Hills include Copper, Barium, Fluoride, TTHM, Total Haloacetic Acids (HAA5). 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.