Cass County, North Dakota — public water systems

27 active public water systems serve Cass County, reporting 176.8K people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

Population served

176.8K

Community systems

Groundwater share

85.2%

Water systems in Cass County

Active public water systems in Cass County, North Dakota
#	Water system	County	Population served	Type	Source
1	Fargo City of	Cass	120,762	Community	Surface water
2	West Fargo City of	Cass	34,858	Community	Purchased surface water
3	Cass Rural Water District Fargo	Cass	4,242	Community	Purchased surface water
4	Cass Rural Water District-Phase I	Cass	3,658	Community	Groundwater
5	Casselton City of	Cass	2,513	Community	Purchased groundwater
6	Cass Rural Water District-Phase Ii	Cass	1,700	Community	Groundwater
7	Cass Rural Water District-Phase Iii	Cass	1,682	Community	Groundwater
8	Horace City of	Cass	1,641	Community	Purchased surface water
9	Mapleton City of	Cass	1,320	Community	Purchased groundwater
10	Harwood City of	Cass	718	Community	Groundwater
11	Kindred City of	Cass	692	Community	Purchased groundwater
12	Argusville City of	Cass	475	Community	Purchased groundwater
13	Arthur City of	Cass	337	Community	Purchased groundwater
14	Oxbow City of	Cass	305	Community	Groundwater
15	Hunter City of	Cass	261	Community	Purchased groundwater
16	Tower City City of	Cass	253	Community	Purchased groundwater
17	Davenport City of	Cass	252	Community	Purchased groundwater
18	Page City of	Cass	232	Community	Purchased groundwater
19	Buffalo City of	Cass	188	Community	Purchased groundwater
20	Grandin City of	Cass	173	Community	Purchased groundwater
21	Horseshoe Bend	Cass	110	Community	Purchased groundwater
22	Amenia City of	Cass	94	Community	Purchased groundwater
23	Riverdale Subdivision	Cass	88	Community	Groundwater
24	Gardner City of	Cass	74	Community	Purchased groundwater
25	Fradets Orchard Water System	Cass	56	Community	Groundwater
26	Country Acres Water Co	Cass	50	Community	Groundwater
27	Knickerbocker Liquor Locker	Cass	30	Transient non-community	Groundwater