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Tap water quality report

Forest Park, IL

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Forest Park. 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
23,189
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Forest Park'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
1112 µg/L 28%
of the EPA limit 4000 µg/L
Highest in the city: GLENCOE · 8,849 people · 2019
1/2 SYR4
Nitrate
740 µg/L 7.4%
of the EPA limit 10000 µg/L
Highest in the city: GLENCOE · 8,849 people · 2019
1/2 SYR4
Nitrate-Nitrite
714 µg/L 7.1%
of the EPA limit 10000 µg/L
Highest in the city: GLENCOE · 8,849 people · 2018
1/2 SYR4
Copper
343.7 µg/L 26%
of the EPA limit 1300 µg/L
Highest in the city: GLENCOE · 8,849 people · 2018
1/2 SYR4
Lead
139.84 µg/L 932%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: FOREST PARK · 14,340 people · 2018
2/2 SYR4
TTHM
55.22 µg/L 69%
of the EPA limit 80 µg/L
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Chloroform
32.94 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Barium
21.65 µg/L 1.1%
of the EPA limit 2000 µg/L
Highest in the city: GLENCOE · 8,849 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
20.82 µg/L 35%
of the EPA limit 60 µg/L
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Bromodichloromethane
15.28 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Dichloroacetic Acid
9.664 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
Highest in the city: 13.2 µg/L — GLENCOE · 8,849 people · 2019
2/2 SYR4
Trichloroacetic Acid
10.54 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Monochloroacetic Acid
9.251 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
1/2 SYR4
Dibromochloromethane
7.022 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.3775 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
Highest in the city: 2.42 µg/L — GLENCOE · 8,849 people · 2019
2/2 SYR4
Arsenic
1.81 µg/L 18%
of the EPA limit 10 µg/L
Highest in the city: GLENCOE · 8,849 people · 2019
1/2 SYR4
Monobromoacetic Acid
1.737 µg/L
No EPA limit set
Main supplier: FOREST PARK · 14,340 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
1.39 pCi/L 28%
of the EPA limit 5 pCi/L
Highest in the city: GLENCOE · 8,849 people · 2015
1/2 SYR4
Bromoform
1.26125 µg/L
No EPA limit set
Highest in the city: GLENCOE · 8,849 people · 2019
1/2 SYR4
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
Main supplier: FOREST PARK · 14,340 people · 2025
Highest in the city: 0.0069 mg/L — GLENCOE · 8,849 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 Forest Park

SupplierPopulation served
FOREST PARK 14,340
GLENCOE 8,849

Frequently asked questions about Forest Park tap water

Is Forest Park tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Forest Park. 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 Forest Park?

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

What contaminants are in Forest Park's water?

The contaminants EPA monitoring detected in Forest Park include Fluoride, Nitrate, Nitrate-Nitrite, Copper, Lead. 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.