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Tap water quality report

Postville, IA

EPA monitoring detected 12 contaminants across the 1 water supplier serving Postville. 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
2,513
people served
12
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Postville'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
Fluoride
620 µg/L 16%
of the EPA limit 4000 µg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Copper
107.95 µg/L 8.3%
of the EPA limit 1300 µg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2017
1/1 SYR4
Barium
56.22 µg/L 2.8%
of the EPA limit 2000 µg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2014
1/1 SYR4
Lead
9.3 µg/L 62%
of the EPA limit 15 µg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2017
1/1 SYR4
TTHM
4.94 µg/L 6.2%
of the EPA limit 80 µg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
3.516 pCi/L 70%
of the EPA limit 5 pCi/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2018
1/1 SYR4
Chloroform
2.653 µg/L
No EPA limit set
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Bromodichloromethane
1.754 µg/L
No EPA limit set
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Dibromochloromethane
1.003 µg/L
No EPA limit set
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Trichloroacetic Acid
0.9700 µg/L
No EPA limit set
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Bromoform
0.7600 µg/L
No EPA limit set
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 people · 2019
1/1 SYR4
Lead
0.0099 mg/L 66%
of the EPA limit 0.0150 mg/L
Main supplier: POSTVILLE WATER DEPARTMENT · 2,513 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 Postville

SupplierPopulation served
POSTVILLE WATER DEPARTMENT 2,513

Frequently asked questions about Postville tap water

Is Postville tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Postville. 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 Postville?

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

What contaminants are in Postville's water?

The contaminants EPA monitoring detected in Postville include Fluoride, Copper, Barium, Lead, 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.