Public water system · MN1870002
ActiveClarkfield
At a glance
Clarkfield (PWSID MN1870002) is an active community water system in Yellow Medicine County, Minnesota. It reports serving 841 people through 416 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
841
Service connections
416
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Clarkfield compare with other water systems in Yellow Medicine County?
By EPA's size categories, Clarkfield is a small system (501 to 3,300 people). Yellow Medicine County has 13 active public water systems, and Clarkfield is the 3rd-largest of them by population served. Its population served is about 57% above the county average of 536 people per system, and accounts for 12% 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 Clarkfield 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates Clarkfield?
EPA lists Clarkfield 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 Clarkfield have drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between August 1991 and July 2025. By type: 8 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 5 as archived and 4 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2021-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1993-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 9 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.
Clarkfield: frequently asked questions
Who runs Clarkfield?
Clarkfield (PWSID MN1870002) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Clarkfield serve?
Clarkfield reports serving 841 people through 416 service connections in Yellow Medicine County, Minnesota.
Where does Clarkfield 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 Clarkfield have any drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2025. 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 Clarkfield'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 9 violations for this system; none is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Clarkfield's water quality report?
As a community water system, Clarkfield 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 |
| Wood Lake | Yellow Medicine | 423 | Community | Groundwater |
| Hanley Falls | Yellow Medicine | 275 | Community | Groundwater |
| Echo | Yellow Medicine | 269 | Community | Purchased groundwater |
| Porter | Yellow Medicine | 180 | 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, “Clarkfield, PWSID MN1870002, Minnesota”, https://aquacensus.com/water-systems/minnesota/clarkfield-mn1870002 (data as of October 1, 2026).