Public water system · IA6673016
ActiveSt Ansgar Water Supply
At a glance
St Ansgar Water Supply (PWSID IA6673016) is an active community water system in Mitchell County, Iowa. It reports serving 1,161 people through 648 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in January 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,161
Service connections
648
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Ansgar Water Supply compare with other water systems in Mitchell County?
By EPA's size categories, St Ansgar Water Supply is a small system (501 to 3,300 people). Mitchell County has 16 active public water systems, and St Ansgar Water Supply is the 2nd-largest of them by population served. Its population served is about 3 times the county average of 382 people per system, and accounts for 19% of the 6,105 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 St Ansgar Water Supply 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 St Ansgar Water Supply?
EPA lists St Ansgar Water Supply 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 16 active systems in Mitchell County (50%) are also owned by a local government.
Does St Ansgar Water Supply have drinking water violations?
EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in January 2021. The violations listed here began between October 1992 and January 2021. By type: 7 monitoring and reporting, 2 monitoring and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrate (5 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2021-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2009-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2002-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 11 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.
St Ansgar Water Supply: frequently asked questions
Who runs St Ansgar Water Supply?
St Ansgar Water Supply (PWSID IA6673016) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does St Ansgar Water Supply serve?
St Ansgar Water Supply reports serving 1,161 people through 648 service connections in Mitchell County, Iowa.
Where does St Ansgar Water Supply 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 St Ansgar Water Supply have any drinking water violations?
EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in January 2021. 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 St Ansgar Water Supply'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 11 violations for this system; 2 are health-based, and the most recent began in January 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find St Ansgar Water Supply's water quality report?
As a community water system, St Ansgar Water Supply 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 Mitchell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Osage Municipal Water Supply | Mitchell | 3,637 | Community | Groundwater |
| Stacyville Water Supply | Mitchell | 465 | Community | Groundwater |
| St Peter Lutheran Church | Mitchell | 188 | Transient non-community | Groundwater |
| Old County Seat Bar & Grill | Mitchell | 101 | Transient non-community | Groundwater |
| Absolute Energy LLC | Mitchell | 70 | Non-transient non-community | Groundwater |
| Orchard Water Works | Mitchell | 68 | 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, “St Ansgar Water Supply, PWSID IA6673016, Iowa”, https://aquacensus.com/water-systems/iowa/st-ansgar-water-supply-ia6673016 (data as of October 1, 2026).