Is Postville Water Department Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Allamakee

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MON	Monitoring	Resolved	2023-07-01 → 2023-07-31
MON	Monitoring	Resolved	2023-07-01 → 2023-07-31
MON	Monitoring	Resolved	2023-07-01 → 2023-07-31
MON	Monitoring	Resolved	2023-07-01 → 2023-07-31
MR	Monitoring	Resolved	2018-10-01 → 2024-09-30
MR	Monitoring	Resolved	2018-10-01 → 2024-09-30
MR	Monitoring	Resolved	2018-10-01 → 2024-09-30
MR	Monitoring	Resolved	2018-10-01 → 2024-09-30
MR	Monitoring	Resolved	1993-10-01 → 1994-09-30
MR	Monitoring	Resolved	1993-10-01 → 1994-09-30

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Fluoride	620 µg/L 16% of the EPA limit 4000 µg/L worst single sample: 650 µg/L	67/96	SYR4	2012–2019
Copper	107.95 µg/L 8.3% of the EPA limit 1300 µg/L worst single sample: 126 µg/L	20/20	SYR4	2014–2017
Lead	0.0099 mg/L 66% of the EPA limit 0.0150 mg/L	13/13	LCR	2023
Lead	9.3 µg/L 62% of the EPA limit 15 µg/L worst single sample: 10.2 µg/L	13/20	SYR4	2014–2017
Bromodichloromethane	1.754 µg/L No EPA limit set worst single sample: 1.82 µg/L	7/7	SYR4	2013–2019
Chloroform	2.653 µg/L No EPA limit set worst single sample: 2.74 µg/L	7/7	SYR4	2013–2019
Dibromochloromethane	1.003 µg/L No EPA limit set worst single sample: 1.06 µg/L	7/7	SYR4	2013–2019
TTHM	4.94 µg/L 6.2% of the EPA limit 80 µg/L worst single sample: 5.06 µg/L	7/7	SYR4	2013–2019
Trichloroacetic Acid	0.9700 µg/L No EPA limit set worst single sample: 1 µg/L	5/7	SYR4	2013–2019
Combined Radium (-226 And -228)	3.516 pCi/L 70% of the EPA limit 5 pCi/L worst single sample: 3.6 pCi/L	4/4	SYR4	2012–2018
Barium	56.22 µg/L 2.8% of the EPA limit 2000 µg/L worst single sample: 56.3 µg/L	2/2	SYR4	2014
Bromoform	0.7600 µg/L No EPA limit set	1/7	SYR4	2013–2019

48 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylbenzeneGlyphosateLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNitratePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: POSTVILLE WATER DEPARTMENT
Phone: 563-379-9341
Email: [email protected]

Frequently asked questions about Postville Water Department

Is Postville Water Department tap water safe to drink?

EPA monitoring detected 12 contaminants in Postville Water Department's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Postville Water Department's water?

EPA monitoring detected Fluoride, Copper, Lead, Lead, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Postville Water Department serve?

Postville Water Department reports serving 2,513 people in Iowa, per its EPA record.

Has Postville Water Department had any water quality violations?

The EPA has 31 violations on file for Postville Water Department, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.