Is Elmhurst, IL Tap Water Safe? Quality & Contaminants

What was found in Elmhurst'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Copper	350.3 µg/L 27% of the EPA limit 1300 µg/L Main supplier: ELMHURST · 45,000 people · 2017	1/2	SYR4
TTHM	52.03 µg/L 65% of the EPA limit 80 µg/L Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Chloroform	31.42 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Total Haloacetic Acids (HAA5)	25.16 µg/L 42% of the EPA limit 60 µg/L Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Bromodichloromethane	13.86 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Dichloroacetic Acid	11.86 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Trichloroacetic Acid	11.46 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Monochloroacetic Acid	7.564 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	1/2	SYR4
Lead	6.9775 µg/L 47% of the EPA limit 15 µg/L Main supplier: ELMHURST · 45,000 people · 2017	1/2	SYR4
Dibromochloromethane	6.784 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	2/2	SYR4
Dibromoacetic Acid	1.7765 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019 Highest in the city: 1.8 µg/L — DU PAGE WATER COMMISSION · 1 people · 2019	2/2	SYR4
Monobromoacetic Acid	1.7075 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2019	1/2	SYR4
Lead	0.0072 mg/L 48% of the EPA limit 0.0150 mg/L Main supplier: ELMHURST · 45,000 people · 2025	1/2	LCR
Pfba	0.0063 µg/L No EPA limit set Main supplier: ELMHURST · 45,000 people · 2024	1/2	UCMR-5

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 Elmhurst

Supplier	Population served
ELMHURST	45,000
DU PAGE WATER COMMISSION	1

Frequently asked questions about Elmhurst tap water

Is Elmhurst tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Elmhurst. 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 Elmhurst?

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

What contaminants are in Elmhurst's water?

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