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Tap water quality report

Polk City, IA

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Polk City. 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
6,558
people served
18
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Polk City'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
3300 µg/L 33%
of the EPA limit 10000 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Copper
1012.5 µg/L 78%
of the EPA limit 1300 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Barium
156 µg/L 7.8%
of the EPA limit 2000 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2013
1/2 SYR4
TTHM
60.035 µg/L 75%
of the EPA limit 80 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Chloroform
43.2 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
19.22 µg/L 32%
of the EPA limit 60 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Bromodichloromethane
12.05 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Dichloroacetic Acid
11.465 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Lithium
10.1 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2023
1/2 UCMR-5
Monochloroacetic Acid
6.552 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Dibromochloromethane
6.4645 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Trichloroacetic Acid
6.1 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Lead
5.2 µg/L 35%
of the EPA limit 15 µg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Dibromoacetic Acid
1.469 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Bromoform
1.101 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Monobromoacetic Acid
1.0685 µg/L
No EPA limit set
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2019
1/2 SYR4
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
Main supplier: POLK CITY WATER SUPPLY · 6,533 people · 2025
1/2 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 Polk City

SupplierPopulation served
POLK CITY WATER SUPPLY 6,533
CIWW ( POLK CITY) 25

Frequently asked questions about Polk City tap water

Is Polk City tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Polk City. 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 Polk City?

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

What contaminants are in Polk City's water?

The contaminants EPA monitoring detected in Polk City include Nitrate, Copper, Fluoride, Barium, TTHM. 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.