Public water system · MN1870007
ActiveSaint Leo
At a glance
Saint Leo (PWSID MN1870007) is an active community water system in Yellow Medicine County, Minnesota. It reports serving 97 people through 54 service connections. Its primary water source is purchased 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 January 1998.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
97
Service connections
54
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Saint Leo compare with other water systems in Yellow Medicine County?
By EPA's size categories, Saint Leo is a very small system (500 people or fewer). Yellow Medicine County has 13 active public water systems. Its population served is well below the county average of 536 people per system, and accounts for 1.4% of the 6,968 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active community water system reports serving 6,703 people, so Saint Leo 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. Minnesota has 987 active community water systems, 15% of the state's 6,465 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 89 Minnesota systems (1.4%) list purchased groundwater as their primary source.
Who owns and regulates Saint Leo?
EPA lists Saint Leo as owned by a local government. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 9 of the 13 active systems in Yellow Medicine County (69%) are also owned by a local government.
Does Saint Leo have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1998. The violations listed here began between January 1992 and January 1998. By type: 7 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as archived and 2 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 1998-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Saint Leo: frequently asked questions
Who runs Saint Leo?
Saint Leo (PWSID MN1870007) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Saint Leo serve?
Saint Leo reports serving 97 people through 54 service connections in Yellow Medicine County, Minnesota.
Where does Saint Leo get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Saint Leo have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 1998. 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 Leo'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 January 1998. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Saint Leo's water quality report?
As a community water system, Saint Leo 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 Yellow Medicine County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Granite Falls | Yellow Medicine | 2,843 | Community | Groundwater |
| Canby | Yellow Medicine | 1,769 | Community | Groundwater |
| Clarkfield | Yellow Medicine | 841 | Community | Groundwater |
| Wood Lake | Yellow Medicine | 423 | Community | Groundwater |
| Hanley Falls | Yellow Medicine | 275 | Community | Groundwater |
| Echo | Yellow Medicine | 269 | 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, “Saint Leo, PWSID MN1870007, Minnesota”, https://aquacensus.com/water-systems/minnesota/saint-leo-mn1870007 (data as of October 1, 2026).