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Shell Rock, MN Tap Water Quality 2026

Water quality report for Shell Rock, MN — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Shell Rock's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Glenville PWSID: MN1240010 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.00 ppb, 7% of the action level and no violations are open. PFAS has never been sampled at this system.

C

Shell Rock earns a C for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 1.00 ppb — 7% of the federal action level
PFAS never sampled at this system
14 violations since 2015, 9 health-based
No violations currently open
Shell Rock's lead level vs. all Minnesota community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.00 ppb — 7% of the federal action level
✓ Lower lead than 100% of Minnesota utilities
Population Served
~280 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
14 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.00 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
200.8% of EPA action level
2,610 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 1.00 ppb, 7% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 23 PCI/L 15 pCi/L 2025–2026 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 9.3 PCI/L 15 pCi/L 2024–2025 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 24 PCI/L 15 pCi/L 2024 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 23 PCI/L 15 pCi/L 2023 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 10.9 PCI/L 15 pCi/L 2023 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 11.4 PCI/L 15 pCi/L 2022 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 11.6 PCI/L 15 pCi/L 2022 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 13.9 PCI/L 15 pCi/L 2021 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 20.3 PCI/L 15 pCi/L 2020 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

14 violations are on record since 2015, of which 9 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Glenville
PWSID MN1240010
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served
Service connections 280
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Shell Rock tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.00 ppb, 7% of the action level.
Does Shell Rock water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Shell Rock? ▼
Glenville (PWSID MN1240010), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-04-17. No significant deficiencies were recorded.

What Should Shell Rock Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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