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Tap water quality report

Dwight, IL

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Dwight. 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
4,574
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Dwight'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
Nitrate
3500 µg/L 35%
of the EPA limit 10000 µg/L
Main supplier: DWIGHT · 4,400 people · 2019
1/2 SYR4
Nitrate-Nitrite
1880 µg/L 19%
of the EPA limit 10000 µg/L
Main supplier: DWIGHT · 4,400 people · 2018
1/2 SYR4
Copper
1200 µg/L 92%
of the EPA limit 1300 µg/L
Main supplier: DWIGHT · 4,400 people · 2017
2/2 SYR4
Fluoride
811.7 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: DWIGHT · 4,400 people · 2018
1/2 SYR4
Barium
150.1 µg/L 7.5%
of the EPA limit 2000 µg/L
Main supplier: DWIGHT · 4,400 people · 2018
1/2 SYR4
Total Haloacetic Acids (HAA5)
24 µg/L 40%
of the EPA limit 60 µg/L
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
TTHM
21.389 µg/L 27%
of the EPA limit 80 µg/L
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Dichloroacetic Acid
12.46 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Lead
2.36 µg/L 16%
of the EPA limit 15 µg/L
Main supplier: DWIGHT · 4,400 people · 2017
Highest in the city: 12.45 µg/L — WM W FOX DEVELOPMENT CENTER · 174 people · 2019
2/2 SYR4
Dibromoacetic Acid
10.906 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Bromodichloromethane
7.802 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Chloroform
6.7465 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Arsenic
5.79 µg/L 58%
of the EPA limit 10 µg/L
Main supplier: DWIGHT · 4,400 people · 2018
1/2 SYR4
Dibromochloromethane
5.1725 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
2/2 SYR4
Monochloroacetic Acid
2.41 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
Highest in the city: 3.46 µg/L — WM W FOX DEVELOPMENT CENTER · 174 people · 2017
2/2 SYR4
Monobromoacetic Acid
2.879 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
1/2 SYR4
Bromoform
2.837 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
2.303 pCi/L 46%
of the EPA limit 5 pCi/L
Main supplier: DWIGHT · 4,400 people · 2019
1/2 SYR4
Trichloroacetic Acid
1.875 µg/L
No EPA limit set
Main supplier: DWIGHT · 4,400 people · 2019
1/2 SYR4
Lead
0.0140 mg/L 93%
of the EPA limit 0.0150 mg/L
Main supplier: DWIGHT · 4,400 people · 2025
Highest in the city: 0.0440 mg/L — WM W FOX DEVELOPMENT CENTER · 174 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 Dwight

SupplierPopulation served
DWIGHT 4,400
WM W FOX DEVELOPMENT CENTER 174

Frequently asked questions about Dwight tap water

Is Dwight tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Dwight. 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 Dwight?

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

What contaminants are in Dwight's water?

The contaminants EPA monitoring detected in Dwight include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium. 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.