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North Dakota Water Quality
128
Utilities in database
0.7M
Residents served
48%
On private wells
2
Key contaminants tracked
Drinking Water in North Dakota
North Dakota has 128 community water systems serving approximately 0.7 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead. 48% of North Dakota residents rely on private wells. NDDoH holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in North Dakota
26–50 of 128Southeast Wud (east)
ND3901068 · 4,225 served
Omnd Water Treatment Plant
ND2901491 · 4,168 served
Mckenzie County Wrd
ND2701477 · 3,895 served
South Central Regional Water District
ND0801154 · 3,700 served
Cass Rural Water District-phase I
ND0901060 · 3,658 served
South Central Rwd-emmons
ND1501653 · 3,650 served
Central Plains Water District
ND5201309 · 3,504 served
Agassiz Water Users District
ND1801056 · 3,438 served
Northeast Rwd- North Valley Branch
ND3401128 · 3,422 served
City of Beulah
ND2900074 · 3,058 served
Walsh Rural Water District
ND5001075 · 3,000 served
City of Rugby
ND3500842 · 2,876 served
East Central Regional Wd-traill
ND4901071 · 2,800 served
North Prairie Rwd-system Iii
ND5101065 · 2,742 served
City of Casselton
ND0900166 · 2,513 served
Tri-county Water District
ND3201072 · 2,501 served
Northeast Rwd-langdon Branch
ND1001380 · 2,450 served
City of Hazen
ND2900470 · 2,411 served
City of Bottineau
ND0500099 · 2,211 served
City of Tioga
ND5300936 · 2,202 served
City of Lisbon
ND3700574 · 2,154 served
City of Carrington
ND1600159 · 2,065 served
City of Langdon
ND1000543 · 1,878 served
City of Mayville
ND4900622 · 1,858 served
City of Oakes
ND1100758 · 1,856 served
Key Contaminant Concerns in North Dakota
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
North Dakota Water FAQs
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Data source: Utility data from EPA SDWIS. 128 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-24