Is Coleharbor City of Tap Water Safe? Quality Report

Water source: GWP
Ownership: Local government
Counties served: McLean

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2025-11-19
RPT	Monitoring	Resolved	2025-07-02
RPT	Monitoring	Resolved	2025-07-02
RPT	Monitoring	Resolved	2025-07-02
RPT	Monitoring	Resolved	2025-07-02
MR	Monitoring	Resolved	2022-10-19
MR	Monitoring	Resolved	2022-07-01 → 2022-09-30
MR	Monitoring	Resolved	2022-07-01 → 2022-09-30
MR	Monitoring	Resolved	2022-07-01 → 2022-09-30
MON	Monitoring	Resolved	2021-04-01 → 2021-04-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0036 mg/L 24% of the EPA limit 0.0150 mg/L	16/16	LCR	2025
Copper	661.4 µg/L 51% of the EPA limit 1300 µg/L worst single sample: 744 µg/L	15/15	SYR4	2013–2019
Lead	6.636 µg/L 44% of the EPA limit 15 µg/L worst single sample: 6.68 µg/L	5/15	SYR4	2013–2019
Bromodichloromethane	5.6795 µg/L No EPA limit set worst single sample: 5.72 µg/L	2/2	SYR4	2014–2017
Chloroform	6.752 µg/L No EPA limit set worst single sample: 6.85 µg/L	2/2	SYR4	2014–2017
Dibromochloromethane	3.541 µg/L No EPA limit set worst single sample: 3.55 µg/L	2/2	SYR4	2014–2017
Dichloroacetic Acid	3.8405 µg/L No EPA limit set worst single sample: 3.93 µg/L	2/2	SYR4	2014–2017
TTHM	15.9725 µg/L 20% of the EPA limit 80 µg/L worst single sample: 16.12 µg/L	2/2	SYR4	2014–2017
Total Haloacetic Acids (HAA5)	7.8285 µg/L 13% of the EPA limit 60 µg/L worst single sample: 8.02 µg/L	2/2	SYR4	2014–2017
Trichloroacetic Acid	2.5155 µg/L No EPA limit set worst single sample: 2.54 µg/L	2/2	SYR4	2014–2017
Dibromoacetic Acid	1.55 µg/L No EPA limit set	1/2	SYR4	2014–2017

3 contaminants tested, none detected

BromoformMonobromoacetic AcidMonochloroacetic Acid

Utility contact

Contact: LEMER, BREANNA
Phone: 701-226-1154
Email: [email protected]

Frequently asked questions about Coleharbor City of

Is Coleharbor City of tap water safe to drink?

EPA monitoring detected 11 contaminants in Coleharbor City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Coleharbor City of's water?

EPA monitoring detected Lead, Copper, Lead, Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Coleharbor City of serve?

Coleharbor City of reports serving 79 people in North Dakota, per its EPA record.

Has Coleharbor City of had any water quality violations?

The EPA has 42 violations on file for Coleharbor City of, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.