States ›North Dakota ›McLean County ›Coleharbor

Coleharbor, ND Tap Water Quality 2026

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

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

Main Utility: Coleharbor City Of PWSID: ND2800194 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.60 ppb, 24% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Coleharbor earns a B for water quality

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

Lead: 3.60 ppb — 24% of the federal action level
PFAS never sampled at this system
9 violations since 2015, 0 health-based
No violations currently open
Coleharbor's lead level vs. all North Dakota community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.60 ppb — 24% of the federal action level
✓ Lower lead than 23% of North Dakota utilities
Population Served
29
~47 connections
Water Source
Groundwater
Purchased groundwater from another system — SDWIS source code GWP
Active Violations
0
9 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
24% of EPA action level
3.60 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.60 ppb, 24% 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.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 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

9 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Coleharbor City Of
PWSID ND2800194
Water source Groundwater — Purchased groundwater from another system — SDWIS source code GWP
Population served 29
Service connections 47
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Coleharbor tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.60 ppb, 24% of the action level.
Does Coleharbor 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 Coleharbor? ▼
Coleharbor City Of (PWSID ND2800194), one of 2 systems serving this area. Groundwater. Purchased groundwater from another system — SDWIS source code GWP
When was this system last inspected? ▼
It was last inspected on 2024-06-04. No significant deficiencies were recorded.

What Should Coleharbor 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.

Nearby Cities in North Dakota

Washburn, Nd Tap Water Quality 2026 McLean Garrison, Nd Tap Water Quality 2026 McLean Underwood, Nd Tap Water Quality 2026 McLean White Shield, Nd Tap Water Quality 2026 McLean Turtle Lake, Nd Tap Water Quality 2026 McLean Max, Nd Tap Water Quality 2026 McLean