State Hub
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
51–75 of 128Garrison Rural Water District
ND2801430 · 1,805 served
Mclean-sheridan Water District-system 1
ND2801400 · 1,800 served
City of Harvey
ND5200458 · 1,783 served
Cass Rural Water District-phase Ii
ND0901124 · 1,700 served
Cass Rural Water District-phase Iii
ND0901131 · 1,682 served
Southeast Wud (central-lisbon)
ND3701448 · 1,675 served
City of Horace
ND0900488 · 1,641 served
City of Hillsboro
ND4900482 · 1,603 served
City of Bowman
ND0600119 · 1,470 served
City of Garrison
ND2800389 · 1,453 served
City of Crosby
ND1200211 · 1,406 served
City of Park River
ND5000773 · 1,403 served
City of Ellendale
ND1100306 · 1,394 served
City of New Rockford
ND1400732 · 1,391 served
City of Surrey
ND5100923 · 1,365 served
City of Larimore
ND1800550 · 1,346 served
City of Alexander
ND2700006 · 1,335 served
City of Mapleton
ND0900613 · 1,320 served
City of Cavalier
ND3400170 · 1,302 served
Upper Souris Water District-system I
ND5101074 · 1,296 served
City of Rolla
ND4000834 · 1,280 served
Southeast Wud (west)
ND1101442 · 1,275 served
City of Washburn
ND2800989 · 1,246 served
City of Hettinger
ND0100476 · 1,226 served
City of Stanley
ND3100898 · 1,138 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
Quick Links
Data source: Utility data from EPA SDWIS. 128 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-24