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Tap water quality report

Deerfield, IL

EPA monitoring detected 12 contaminants across the 1 water supplier serving Deerfield. 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
19,196
people served
12
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Deerfield'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
255.59999999999968 µg/L 20%
of the EPA limit 1300 µg/L
Main supplier: DEERFIELD · 19,196 people · 2018
1/1 SYR4
TTHM
48.825 µg/L 61%
of the EPA limit 80 µg/L
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Chloroform
29.925 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
23.98 µg/L 40%
of the EPA limit 60 µg/L
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Lead
15.666 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: DEERFIELD · 19,196 people · 2018
1/1 SYR4
Dichloroacetic Acid
13.639999999999999 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Bromodichloromethane
13.2 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Trichloroacetic Acid
9.12 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Dibromochloromethane
6.3500000000000005 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Monochloroacetic Acid
2 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.6 µg/L
No EPA limit set
Main supplier: DEERFIELD · 19,196 people · 2019
1/1 SYR4
Lead
0.0052 mg/L 35%
of the EPA limit 0.0150 mg/L
Main supplier: DEERFIELD · 19,196 people · 2026
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 Deerfield

SupplierPopulation served
DEERFIELD 19,196

Frequently asked questions about Deerfield tap water

Is Deerfield tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Deerfield. 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 Deerfield?

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

What contaminants are in Deerfield's water?

The contaminants EPA monitoring detected in Deerfield 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.