Public water system · MN1020044
ActiveOak Grove
At a glance
Oak Grove (PWSID MN1020044) is an active community water system in Anoka County, Minnesota. It reports serving 623 people through 237 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
623
Service connections
237
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Oak Grove compare with other water systems in Anoka County?
By EPA's size categories, Oak Grove is a small system (501 to 3,300 people). Anoka County has 241 active public water systems. Its population served is about half of the county average of 1,360 people per system, and accounts for 0.2% of the 327,753 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 Oak Grove 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 Oak Grove?
EPA lists Oak Grove 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. 45 of the 241 active systems in Anoka County (19%) are also owned by a local government.
Does Oak Grove have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2025. The violations listed here began between July 2010 and October 2025. By type: 2 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminants or rules involved are Revised Total Coliform Rule, Chlorine, Lead and Copper Rule and Arsenic. EPA lists 3 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Archived |
| 2024-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2010-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
All 4 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.
Oak Grove: frequently asked questions
Who runs Oak Grove?
Oak Grove (PWSID MN1020044) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Oak Grove serve?
Oak Grove reports serving 623 people through 237 service connections in Anoka County, Minnesota.
Where does Oak Grove 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 Oak Grove have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 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 Oak Grove'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 4 violations for this system; 1 is health-based, and the most recent began in October 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 Oak Grove's water quality report?
As a community water system, Oak Grove 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 Anoka County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Blaine | Anoka | 70,220 | Community | Groundwater |
| Coon Rapids | Anoka | 64,000 | Community | Groundwater |
| Fridley | Anoka | 27,476 | Community | Groundwater |
| Columbia Heights | Anoka | 22,278 | Community | Purchased surface water |
| Andover | Anoka | 21,455 | Community | Groundwater |
| Lino Lakes | Anoka | 17,859 | 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, “Oak Grove, PWSID MN1020044, Minnesota”, https://aquacensus.com/water-systems/minnesota/oak-grove-mn1020044 (data as of October 1, 2026).