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Tap water quality report

Mount Prospect, IL

EPA monitoring detected 13 contaminants across the 1 water supplier serving Mount Prospect. 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
41,000
people served
13
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Mount Prospect'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
148.04999999999998 µg/L 11%
of the EPA limit 1300 µg/L
Main supplier: MOUNT PROSPECT · 41,000 people · 2017
1/1 SYR4
TTHM
56.429999999999964 µg/L 71%
of the EPA limit 80 µg/L
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Chloroform
34.34999999999997 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
24.239999999999988 µg/L 40%
of the EPA limit 60 µg/L
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Lead
16.515999999999995 µg/L 110%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: MOUNT PROSPECT · 41,000 people · 2017
1/1 SYR4
Bromodichloromethane
15.719999999999994 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Dichloroacetic Acid
12.509999999999996 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Trichloroacetic Acid
11.075 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Dibromochloromethane
7.232999999999999 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.428999999999999 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.9759999999999995 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.6859999999999997 µg/L
No EPA limit set
Main supplier: MOUNT PROSPECT · 41,000 people · 2019
1/1 SYR4
Lead
0.0043 mg/L 28%
of the EPA limit 0.0150 mg/L
Main supplier: MOUNT PROSPECT · 41,000 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 Mount Prospect

SupplierPopulation served
MOUNT PROSPECT 41,000

Frequently asked questions about Mount Prospect tap water

Is Mount Prospect tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Mount Prospect. 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 Mount Prospect?

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

What contaminants are in Mount Prospect's water?

The contaminants EPA monitoring detected in Mount Prospect include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), 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.