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Tap water quality report

Sioux Center, IA

EPA monitoring detected 15 contaminants across the 1 water supplier serving Sioux Center. 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
8,231
people served
15
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Sioux Center'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
7710 µg/L 77%
of the EPA limit 10000 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Fluoride
700 µg/L 18%
of the EPA limit 4000 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2013
1/1 SYR4
Copper
433.5099999999976 µg/L 33%
of the EPA limit 1300 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Lithium
77 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2025
1/1 UCMR-5
TTHM
47.3 µg/L 59%
of the EPA limit 80 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
44.144999999999996 µg/L 74%
of the EPA limit 60 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Chloroform
30.239999999999995 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Monochloroacetic Acid
23.679999999999996 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Dichloroacetic Acid
12.545 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Trichloroacetic Acid
12.469999999999999 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Bromodichloromethane
12.3 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Lead
10.98999999999998 µg/L 73%
of the EPA limit 15 µg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Dibromochloromethane
4.8625 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.525 µg/L
No EPA limit set
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2019
1/1 SYR4
Lead
0.0044 mg/L 29%
of the EPA limit 0.0150 mg/L
Main supplier: SIOUX CENTER MUNICIPAL WATER DEPARTMENT · 8,231 people · 2025
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 Sioux Center

SupplierPopulation served
SIOUX CENTER MUNICIPAL WATER DEPARTMENT 8,231

Frequently asked questions about Sioux Center tap water

Is Sioux Center tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Sioux Center. 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 Sioux Center?

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

What contaminants are in Sioux Center's water?

The contaminants EPA monitoring detected in Sioux Center include Nitrate, Fluoride, Copper, Lithium, 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.