Oak Grove
EPA ID: MN1020044 · 623 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Oak Grove (MN1020044): 3 violations on record since 2021. While 3 violations did appear in Oak Grove's monitoring record, none is listed as unresolved; the utility serves approximately 623 residents. A closed violation record does not by itself establish compliance with every current EPA standard.
Data: EPA SDWIS
Service Area Map
Coverage area for Oak Grove Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Oak Grove have a median household income of $126,957 and about 11,025 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 46% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Oak Grove's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 80th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Minnesota
System Overview
Oak Grove (EPA ID: MN1020044) is a community water system in Minnesota that serves approximately 623 people from groundwater sources.
This system serves ZIP code 55011 in Cedar.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 1 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| October 1, 2025 | Chlorine | Non-health-based | Archived |
| October 1, 2024 | Lead and Copper Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| Chlorine | Monitoring & Reporting | 1 | No |
| Chlorine | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MN or modeled from parcel and building-footprint data.
- 55011 - Cedar
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Oak Grove (MN1020044) on EPA.gov.
Frequently Asked Questions
Is Oak Grove water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Oak Grove; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Oak Grove serve?
Oak Grove serves approximately 623 people across 1 ZIP code in Minnesota.
Where does Oak Grove get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Oak Grove (MN): 3 EPA Violations. https://zipcheckup.com/water-system/mn1020044/
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author = {{ZipCheckup}},
title = {{Oak Grove (MN): 3 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/mn1020044/}
}
What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Oak Grove (EPA ID: MN1020044) - request the latest Consumer Confidence Report or ask about specific contaminants.