Tap WaterIndex

← Illinois

Tap water quality report

Arlington Heights, IL

EPA monitoring detected 14 contaminants across the 1 water supplier serving Arlington Heights. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
73,320
people served
14
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Arlington Heights's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
229 µg/L 18%
of the EPA limit 1300 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
72.9 µg/L 122%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
Monobromoacetic Acid
62.7 µg/L
No EPA limit set
 1/1 SYR4
TTHM
59.1 µg/L 74%
of the EPA limit 80 µg/L
 1/1 SYR4
Chloroform
38.3 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
33 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
20.7 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
14.6 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
13.4 µg/L
No EPA limit set
 1/1 SYR4
Lead
12.4 µg/L 83%
of the EPA limit 15 µg/L
 1/1 SYR4
Dibromochloromethane
8.35 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
2.9 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
1.587 µg/L
No EPA limit set
 1/1 SYR4
Lead
0.0088 mg/L 59%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Arlington Heights

SupplierPopulation served
ARLINGTON HEIGHTS 73,320

Frequently asked questions about Arlington Heights tap water

Is Arlington Heights tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Arlington Heights. 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 Arlington Heights?

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

What contaminants are in Arlington Heights's water?

The contaminants EPA monitoring detected in Arlington Heights include Copper, Total Haloacetic Acids (HAA5), Monobromoacetic Acid, TTHM, Chloroform. The full list, with the highest level found 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.