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Tap water quality report

Wonder Lake, IL

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Wonder Lake. 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
5,820
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Wonder Lake'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
1568.9999999999964 µg/L 121%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Fluoride
539 µg/L 13%
of the EPA limit 4000 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
Highest in the city: 1268 µg/L — WONDER LAKE (NIU) · 1,950 people · 2018
2/2 SYR4
Nitrate
390 µg/L 3.9%
of the EPA limit 10000 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Nitrate-Nitrite
380 µg/L 3.8%
of the EPA limit 10000 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Barium
76.75 µg/L 3.8%
of the EPA limit 2000 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
TTHM
29.770499999999977 µg/L 37%
of the EPA limit 80 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
14.665000000000001 µg/L 24%
of the EPA limit 60 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Chloroform
12.700499999999984 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Lead
12.569999999999995 µg/L 84%
of the EPA limit 15 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Bromodichloromethane
11.6955 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Arsenic
7.2799999999999985 µg/L 73%
of the EPA limit 10 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
Highest in the city: 11 µg/L — WONDER LAKE (NIU) · 1,950 people · 2019
2/2 SYR4
Dichloroacetic Acid
8.841999999999999 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Dibromochloromethane
6.5965 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Dibromoacetic Acid
4.377 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Monobromoacetic Acid
4.31 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Trichloroacetic Acid
3.129 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
2/2 SYR4
Selenium
2.3 µg/L 4.6%
of the EPA limit 50 µg/L
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Bromoform
1.7415 µg/L
No EPA limit set
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.39 pCi/L 28%
of the EPA limit 5 pCi/L
Main supplier: WONDER LAKE · 3,870 people · 2019
1/2 SYR4
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
Main supplier: WONDER LAKE · 3,870 people · 2026
2/2 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 Wonder Lake

SupplierPopulation served
WONDER LAKE 3,870
WONDER LAKE (NIU) 1,950

Frequently asked questions about Wonder Lake tap water

Is Wonder Lake tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Wonder Lake. 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 Wonder Lake?

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

What contaminants are in Wonder Lake's water?

The contaminants EPA monitoring detected in Wonder Lake include Copper, Fluoride, Nitrate, 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.