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Tap water quality report

De Witt, IA

EPA monitoring detected 15 contaminants across the 4 water suppliers serving De Witt. 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.

4
water suppliers
5,730
people served
15
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in De Witt'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
200 µg/L 2%
of the EPA limit 10000 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
Highest in the city: 9200 µg/L — BROOKHILL ESTATES · 41 people · 2019
4/4 SYR4
Fluoride
1281 µg/L 32%
of the EPA limit 4000 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2013
2/4 SYR4
Nitrite
520 µg/L 52%
of the EPA limit 1000 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
1/4 SYR4
Copper
347.3 µg/L 27%
of the EPA limit 1300 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
4/4 SYR4
Lithium
110 µg/L
No EPA limit set
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2023
1/4 UCMR-5
Barium
41.6 µg/L 2.1%
of the EPA limit 2000 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2013
Highest in the city: 86 µg/L — BROOKHILL ESTATES · 41 people · 2014
2/4 SYR4
Lead
10.71 µg/L 71%
of the EPA limit 15 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
Highest in the city: 14.315 µg/L — WINDING BROOK MOBILE HOME PARK · 150 people · 2019
4/4 SYR4
Di(2-ethylhexyl) Phthalate
10.755 µg/L 179%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
Highest in the city: CARDINAL VALLEY ESTATES 3RD ADDITION · 25 people · 2019
1/4 SYR4
Selenium
6.3 µg/L 13%
of the EPA limit 50 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2013
1/4 SYR4
Total Haloacetic Acids (HAA5)
6 µg/L 10%
of the EPA limit 60 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
1/4 SYR4
Combined Radium (-226 And -228)
3.81 pCi/L 76%
of the EPA limit 5 pCi/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2018
2/4 SYR4
Arsenic
2.055 µg/L 21%
of the EPA limit 10 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2013
1/4 SYR4
TTHM
2 µg/L 2.5%
of the EPA limit 80 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2019
1/4 SYR4
Dalapon
1.5 µg/L 0.8%
of the EPA limit 200 µg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2016
1/4 SYR4
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
Main supplier: DE WITT WATER SUPPLY · 5,514 people · 2025
4/4 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 De Witt

SupplierPopulation served
DE WITT WATER SUPPLY 5,514
WINDING BROOK MOBILE HOME PARK 150
BROOKHILL ESTATES 41
CARDINAL VALLEY ESTATES 3RD ADDITION 25

Frequently asked questions about De Witt tap water

Is De Witt tap water safe to drink?

EPA testing detected 15 contaminants in the water serving De Witt. 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 De Witt?

4 public water suppliers report drinking-water monitoring for De Witt, Iowa to the EPA. Each is listed above with its population served.

What contaminants are in De Witt's water?

The contaminants EPA monitoring detected in De Witt include Nitrate, Fluoride, Nitrite, Copper, Lithium. 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.