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Tap water quality report

La Grange, IL

EPA monitoring detected 13 contaminants across the 2 water suppliers serving La Grange. 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
16,640
people served
13
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in La Grange'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
300.1 µg/L 23%
of the EPA limit 1300 µg/L
Main supplier: LA GRANGE · 16,200 people · 2017
2/2 SYR4
TTHM
57.91 µg/L 72%
of the EPA limit 80 µg/L
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Chloroform
36.97 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
30.09 µg/L 50%
of the EPA limit 60 µg/L
Main supplier: LA GRANGE · 16,200 people · 2019
Highest in the city: 30.975 µg/L — LA GRANGE ESTATES MHP · 440 people · 2019
2/2 SYR4
Dichloroacetic Acid
15.04 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
Highest in the city: 15.075 µg/L — LA GRANGE ESTATES MHP · 440 people · 2019
2/2 SYR4
Bromodichloromethane
14.53 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Trichloroacetic Acid
12.11 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Lead
10.89 µg/L 73%
of the EPA limit 15 µg/L
Main supplier: LA GRANGE · 16,200 people · 2017
1/2 SYR4
Dibromochloromethane
7.203 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Monochloroacetic Acid
4.341 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.42 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
Highest in the city: 3.1055 µg/L — LA GRANGE ESTATES MHP · 440 people · 2019
2/2 SYR4
Monobromoacetic Acid
2.105 µg/L
No EPA limit set
Main supplier: LA GRANGE · 16,200 people · 2019
2/2 SYR4
Lead
0.0065 mg/L 43%
of the EPA limit 0.0150 mg/L
Main supplier: LA GRANGE · 16,200 people · 2025
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 La Grange

SupplierPopulation served
LA GRANGE 16,200
LA GRANGE ESTATES MHP 440

Frequently asked questions about La Grange tap water

Is La Grange tap water safe to drink?

EPA testing detected 13 contaminants in the water serving La Grange. 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 La Grange?

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

What contaminants are in La Grange's water?

The contaminants EPA monitoring detected in La Grange include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Dichloroacetic Acid. 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.