Public water system · IA8670701
ActivePoweshiek Water Association
At a glance
Poweshiek Water Association (PWSID IA8670701) is an active community water system in Tama County, Iowa. It reports serving 13,920 people through 5,568 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; all are health-based, and the most recent began in July 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
13,920
Service connections
5,568
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Poweshiek Water Association compare with other water systems in Tama County?
By EPA's size categories, Poweshiek Water Association is a large system (10,001 to 100,000 people). Tama County has 13 active public water systems, and Poweshiek Water Association is the largest of them by population served. Its population served is about 7.2 times the county average of 1,947 people per system, and accounts for 55% of the 25,305 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 Poweshiek Water Association is about twice 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 Poweshiek Water Association?
EPA lists Poweshiek Water Association as privately owned. 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. 3 of the 13 active systems in Tama County (23%) are also privately owned.
Does Poweshiek Water Association have drinking water violations?
EPA's records list 7 violations for this system; all are health-based, and the most recent began in July 2002. The violations listed here began between September 1990 and July 2002. By type: 7 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 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 |
|---|---|---|---|---|
| 2002-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1997-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1990-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1990-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1990-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Poweshiek Water Association: frequently asked questions
Who runs Poweshiek Water Association?
Poweshiek Water Association (PWSID IA8670701) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Poweshiek Water Association serve?
Poweshiek Water Association reports serving 13,920 people through 5,568 service connections in Tama County, Iowa.
Where does Poweshiek Water Association 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 Poweshiek Water Association have any drinking water violations?
EPA's records list 7 violations for this system; all are health-based, and the most recent began in July 2002. 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 Poweshiek Water Association'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; all are health-based, and the most recent began in July 2002. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Poweshiek Water Association's water quality report?
As a community water system, Poweshiek Water Association 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 Tama County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tama Water Supply | Tama | 3,130 | Community | Groundwater |
| Toledo Water Supply | Tama | 2,399 | Community | Groundwater |
| Traer Municipal Water Plant | Tama | 1,583 | Community | Groundwater |
| Dysart Water Supply | Tama | 1,281 | Community | Purchased groundwater |
| Iowa Premium LLC | Tama | 841 | Non-transient non-community | Groundwater |
| Gladbrook Water Supply | Tama | 799 | Community | Purchased 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, “Poweshiek Water Association, PWSID IA8670701, Iowa”, https://aquacensus.com/water-systems/iowa/poweshiek-water-association-ia8670701 (data as of October 1, 2026).