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Tap water quality report

Winterset, IA

EPA monitoring detected 20 contaminants across the 1 water supplier serving Winterset. 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
5,428
people served
20
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Winterset'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
6600 µg/L 66%
of the EPA limit 10000 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Fluoride
846 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2013
1/1 SYR4
Chlorite
518.5 µg/L 52%
of the EPA limit 1000 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Copper
239 µg/L 18%
of the EPA limit 1300 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2017
1/1 SYR4
Barium
120 µg/L 6%
of the EPA limit 2000 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2012
1/1 SYR4
TTHM
70.85 µg/L 89%
of the EPA limit 80 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Chloroform
59.85 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
44.85 µg/L 75%
of the EPA limit 60 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Dichloroacetic Acid
28.8 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Bromodichloromethane
16 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Trichloroacetic Acid
13 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Xylenes, Total
12.525 µg/L 0.1%
of the EPA limit 10000 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2018
1/1 SYR4
Dibromochloromethane
7.3 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Monochloroacetic Acid
4 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Ethylbenzene
2.3 µg/L 0.3%
of the EPA limit 700 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2018
1/1 SYR4
Dibromoacetic Acid
2 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2017
1/1 SYR4
Bromoform
0.8650 µg/L
No EPA limit set
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2019
1/1 SYR4
Atrazine
0.1000 µg/L 3.3%
of the EPA limit 3 µg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2018
1/1 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: WINTERSET MUNICIPAL WATERWORKS · 5,428 people · 2023
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 Winterset

SupplierPopulation served
WINTERSET MUNICIPAL WATERWORKS 5,428

Frequently asked questions about Winterset tap water

Is Winterset tap water safe to drink?

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

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

What contaminants are in Winterset's water?

The contaminants EPA monitoring detected in Winterset include Nitrate, Fluoride, Chlorite, Copper, 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.