County · North Dakota
Cass County, North Dakota: drinking water records
This overview covers 25 ZIP codes and 26 community water systems in Cass County. It also stands in for 3 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Fargo City of ND0900336 | 120,762 | 120 | 0 | 2 | 2.3 ppb |
| West Fargo City of ND0900999 | 34,858 | 120 | 0 | 0 | 0 ppb |
| Cass Rural Water District Fargo ND0901483 | 4,242 | 120 | 1 | 0 | 0 ppb |
| Cass Rural Water District-Phase I ND0901060 | 3,658 | 60 | 0 | 0 | 0 ppb |
| Cass Rural Water District-Phase II ND0901124 | 1,700 | 60 | 0 | 0 | 0 ppb |
| Davenport City of ND0900217 | 252 | 0 | 0 | 1 | 0.7 ppb |
| Country Acres Water Co ND0901449 | 50 | 0 | 0 | 1 | 8.8 ppb |
| Casselton City of ND0900166 | 2,513 | 0 | 0 | 0 | 12.1 ppb |
| Cass Rural Water District-Phase III ND0901131 | 1,682 | 0 | 0 | 0 | 0 ppb |
| Horace City of ND0900488 | 1,641 | 0 | 0 | 0 | 0 ppb |
| Mapleton City of ND0900613 | 1,320 | 0 | 0 | 0 | 0 ppb |
| Harwood City of ND0900460 | 718 | 0 | 0 | 0 | 6.7 ppb |
| Kindred City of ND0900524 | 692 | 0 | 0 | 0 | 0 ppb |
| Argusville City of ND0900030 | 475 | 0 | 0 | 0 | 0 ppb |
| Arthur City of ND0900035 | 337 | 0 | 0 | 0 | 0 ppb |
| Oxbow City of ND0901363 | 305 | 0 | 0 | 0 | 0 ppb |
| Hunter City of ND0900492 | 261 | 0 | 0 | 0 | 3.2 ppb |
| Tower City City of ND0900945 | 253 | 0 | 0 | 0 | 0 ppb |
| Page City of ND0900769 | 232 | 0 | 0 | 0 | 0 ppb |
| Buffalo City of ND0900134 | 188 | 0 | 0 | 0 | 1.5 ppb |
| Grandin City of ND0900412 | 173 | 0 | 0 | 0 | 0.8 ppb |
| Horseshoe Bend ND0900489 | 110 | 0 | 0 | 0 | 1.0 ppb |
| Amenia City of ND0900017 | 94 | 0 | 0 | 0 | 0.6 ppb |
| Riverdale Subdivision ND0901365 | 88 | 0 | 0 | 0 | 7 ppb |
| Gardner City of ND0900387 | 74 | 0 | 0 | 0 | 2.2 ppb |
ZIP reports in Cass County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 58002, 58007, 58029.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.