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Tap water quality report

Coleharbor, ND

EPA monitoring detected 11 contaminants across the 1 water supplier serving Coleharbor. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
79
people served
11
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Coleharbor's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
661.4 µg/L 51%
of the EPA limit 1300 µg/L
Main supplier: COLEHARBOR CITY OF · 79 people · 2019
1/1 SYR4
TTHM
15.9725 µg/L 20%
of the EPA limit 80 µg/L
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
7.8285 µg/L 13%
of the EPA limit 60 µg/L
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Chloroform
6.752 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Lead
6.636 µg/L 44%
of the EPA limit 15 µg/L
Main supplier: COLEHARBOR CITY OF · 79 people · 2019
1/1 SYR4
Bromodichloromethane
5.6795 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Dichloroacetic Acid
3.8405 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Dibromochloromethane
3.541 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Trichloroacetic Acid
2.5155 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Dibromoacetic Acid
1.55 µg/L
No EPA limit set
Main supplier: COLEHARBOR CITY OF · 79 people · 2017
1/1 SYR4
Lead
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
Main supplier: COLEHARBOR CITY OF · 79 people · 2025
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Coleharbor

SupplierPopulation served
COLEHARBOR CITY OF 79

Frequently asked questions about Coleharbor tap water

Is Coleharbor tap water safe to drink?

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

How many water suppliers serve Coleharbor?

1 public water supplier report drinking-water monitoring for Coleharbor, North Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Coleharbor's water?

The contaminants EPA monitoring detected in Coleharbor include Copper, TTHM, Total Haloacetic Acids (HAA5), Chloroform, Lead. The full list, with the level at the main supplier and the data source, is in the table above.

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.