Public water system · IA0375053
ActivePostville Water Department
At a glance
Postville Water Department (PWSID IA0375053) is an active community water system in Allamakee County, Iowa. It reports serving 2,513 people through 862 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,513
Service connections
862
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Postville Water Department compare with other water systems in Allamakee County?
By EPA's size categories, Postville Water Department is a small system (501 to 3,300 people). Allamakee County has 34 active public water systems, and Postville Water Department is the 2nd-largest of them by population served. Its population served is about 8.2 times the county average of 306 people per system, and accounts for 24% of the 10,414 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Postville Water Department is about 63% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Postville Water Department?
EPA lists Postville Water Department as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 34 active systems in Allamakee County (15%) are also owned by a local government.
Does Postville Water Department have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2023. The violations listed here began between April 1988 and July 2023. By type: 6 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Gross alpha (excluding radon and uranium) (2 of them). EPA lists 7 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1993-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1991-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1991-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1989-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
All 7 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Postville Water Department: frequently asked questions
Who runs Postville Water Department?
Postville Water Department (PWSID IA0375053) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Postville Water Department serve?
Postville Water Department reports serving 2,513 people through 862 service connections in Allamakee County, Iowa.
Where does Postville Water Department get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Postville Water Department have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Postville Water Department's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Postville Water Department's water quality report?
As a community water system, Postville Water Department must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Allamakee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Waukon Water Department | Allamakee | 3,827 | Community | Groundwater |
| Lansing Water Supply | Allamakee | 983 | Community | Groundwater |
| Agri Star Meat and Poultry LLC | Allamakee | 550 | Non-transient non-community | Groundwater |
| New Albin Water Supply | Allamakee | 432 | Community | Groundwater |
| Harpers Ferry City Complex | Allamakee | 262 | Transient non-community | Groundwater |
| Scenic View Campground | Allamakee | 240 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Postville Water Department, PWSID IA0375053, Iowa”, https://aquacensus.com/water-systems/iowa/postville-water-department-ia0375053 (data as of October 1, 2026).