Public water system · IA7866031
ActiveTreynor Water Department
At a glance
Treynor Water Department (PWSID IA7866031) is an active community water system in Pottawattamie County, Iowa. It reports serving 1,049 people through 495 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 October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,049
Service connections
495
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Treynor Water Department compare with other water systems in Pottawattamie County?
By EPA's size categories, Treynor Water Department is a small system (501 to 3,300 people). Pottawattamie County has 33 active public water systems. Its population served is about 59% below the county average of 2,579 people per system, and accounts for 1.2% of the 85,108 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 Treynor Water Department is well 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 Treynor Water Department?
EPA lists Treynor 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. 15 of the 33 active systems in Pottawattamie County (45%) are also owned by a local government.
Does Treynor 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 October 2024. The violations listed here began between November 1995 and October 2024. By type: 6 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (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 |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2021-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Treynor Water Department: frequently asked questions
Who runs Treynor Water Department?
Treynor Water Department (PWSID IA7866031) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Treynor Water Department serve?
Treynor Water Department reports serving 1,049 people through 495 service connections in Pottawattamie County, Iowa.
Where does Treynor 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 Treynor 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 October 2024. 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 Treynor 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 October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Treynor Water Department's water quality report?
As a community water system, Treynor 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 Pottawattamie County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Council Bluffs Water Works | Pottawattamie | 64,447 | Community | Surface water |
| Regional Water | Pottawattamie + 1 more | 4,132 | Community | Purchased surface water |
| Carter Lake Water District | Pottawattamie | 3,791 | Community | Purchased surface water |
| Avoca Water Works | Pottawattamie | 1,697 | Community | Purchased groundwater |
| Urban Bluffs - North | Pottawattamie | 1,558 | Community | Purchased surface water |
| Oakland Munic Water Utility | Pottawattamie | 1,524 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Treynor Water Department, PWSID IA7866031, Iowa”, https://aquacensus.com/water-systems/iowa/treynor-water-department-ia7866031 (data as of October 1, 2026).