Public water system · IA9176019
ActiveSaint Marys Water Corporation
At a glance
Saint Marys Water Corporation (PWSID IA9176019) is an active community water system in Warren County, Iowa. It reports serving 121 people through 69 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
121
Service connections
69
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Saint Marys Water Corporation compare with other water systems in Warren County?
By EPA's size categories, Saint Marys Water Corporation is a very small system (500 people or fewer). Warren County has 14 active public water systems. Its population served is well below the county average of 4,106 people per system, and accounts for 0.2% of the 57,488 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 Saint Marys Water Corporation 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 119 Iowa systems (6.5%) list purchased surface water as their primary source.
Who owns and regulates Saint Marys Water Corporation?
EPA lists Saint Marys Water Corporation 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. 8 of the 14 active systems in Warren County (57%) are also owned by a local government.
Does Saint Marys Water Corporation have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2018. The violations listed here began between October 1995 and December 2018. By type: 6 contaminant level above the legal limit, 4 monitoring and reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (5 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2018-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2008-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2006-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1997-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
The 12 most recent 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.
Saint Marys Water Corporation: frequently asked questions
Who runs Saint Marys Water Corporation?
Saint Marys Water Corporation (PWSID IA9176019) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Saint Marys Water Corporation serve?
Saint Marys Water Corporation reports serving 121 people through 69 service connections in Warren County, Iowa.
Where does Saint Marys Water Corporation get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Saint Marys Water Corporation have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2018. 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 Saint Marys Water Corporation'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. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Saint Marys Water Corporation's water quality report?
As a community water system, Saint Marys Water Corporation 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 Warren County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Warren Water District | Warren + 1 more | 20,095 | Community | Purchased surface water |
| Indianola Water Supply | Warren | 15,833 | Community | Groundwater |
| Norwalk Water Supply | Warren | 14,334 | Community | Purchased surface water |
| Carlisle Water Supply | Warren | 4,170 | Community | Groundwater |
| Milo Public Water Supply | Warren | 788 | Community | Purchased surface water |
| New Virginia Water Supply | Warren | 498 | Community | Purchased surface water |
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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, “Saint Marys Water Corporation, PWSID IA9176019, Iowa”, https://aquacensus.com/water-systems/iowa/saint-marys-water-corporation-ia9176019 (data as of October 1, 2026).