Tapcensus

North Dakota

Cass County drinking water quality

27 active public water systems serve 176,764 people in Cass County. 15 are compliant, 12 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.

Active systems 27 26 community systems
People served 177K by public water systems
Systems with violations 12 44% of active systems, past 3 years
Serious violators 0 1 systems carry a health flag

Needs attention

Riverdale Subdivision ND0901365 · Community water system · Serves 88 4 rules violated in the past three years. Unresolved: Lead and Copper Rule and Public Notice Rule and Revised PN Rule.

Community water systems

26 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Fargo City of
Fargo 		120,762 0 0
West Fargo City of
West Fargo 		34,858 0 0
Cass Rural Water District Fargo
 4,242 0 0
Cass Rural Water District-Phase I
 3,658 0 0
Casselton City of
Casselton 		2,513 0 0
Cass Rural Water District-Phase II
 1,700 0 0
Cass Rural Water District-Phase III
 1,682 0 0
Horace City of
Horace 		1,641 4 2
Mapleton City of
Mapleton 		1,320 0 0
Harwood City of
Harwood 		718 0 0
Kindred City of
Kindred 		692 0 0
Argusville City of
Argusville 		475 0 0
Arthur City of
Arthur 		337 0 0
Oxbow City of
Oxbow 		305 1 0
Hunter City of
Hunter 		261 4 4
Tower City City of
Tower City 		253 1 1
Davenport City of
Davenport 		252 2 0
Page City of
Page 		232 0 0
Buffalo City of
Buffalo 		188 2 0
Grandin City of
Grandin 		173 1 0
Horseshoe Bend
 110 0 0
Amenia City of
Amenia 		94 0 0
Riverdale Subdivision
 88 4 2
Gardner City of
Gardner 		74 1 0
Fradets Orchard Water System
 56 1 1
Country Acres Water CO
 50 2 0
Non-community systems (1: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Knickerbocker Liquor Locker
 30 1 1
Inactive systems (63, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The North Dakota records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.