Cass, ND
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Cass in North Dakota · Population: 189,286
Cass, ND is tracked across three EPA datasets covering 18 Toxics Release Inventory (TRI) facilities, 24 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 44/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 781.2K lbs of reported toxic releases under EPCRA Section 313, while 5 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 38 and a peak AQI of 158 in 2024, with 79% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 288 (79%) | 76 | 1 | 158 |
| 2023 | 180 (50%) | 166 | 10 | 175 |
| 2022 | 285 (78%) | 79 | 1 | 111 |
| 2021 | 227 (63%) | 119 | 8 | 211 |
| 2020 | 303 (83%) | 60 | 0 | 80 |
Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in North Dakota, see the EPA's AirNow.gov.
Water Systems (24)
| System | Population | Violations |
|---|---|---|
| FARGO CITY OF | 120,762 | 2 |
| WEST FARGO CITY OF | 34,858 | 0 |
| CASS RURAL WATER DISTRICT FARGO | 4,242 | 0 |
| CASS RURAL WATER DISTRICT-PHASE I | 3,658 | 0 |
| CASSELTON CITY OF | 2,513 | 0 |
| CASS RURAL WATER DISTRICT-PHASE II | 1,700 | 0 |
| CASS RURAL WATER DISTRICT-PHASE III | 1,682 | 0 |
| HORACE CITY OF | 1,641 | 0 |
| MAPLETON CITY OF | 1,320 | 0 |
| HARWOOD CITY OF | 718 | 3 |
| KINDRED CITY OF | 692 | 0 |
| ARGUSVILLE CITY OF | 475 | 1 |
| ARTHUR CITY OF | 337 | 0 |
| OXBOW CITY OF | 305 | 0 |
| HUNTER CITY OF | 261 | 0 |
| DAVENPORT CITY OF | 252 | 2 |
| PAGE CITY OF | 232 | 0 |
| BUFFALO CITY OF | 188 | 0 |
| HORSESHOE BEND | 110 | 0 |
| AMENIA CITY OF | 94 | 0 |
| RIVERDALE SUBDIVISION | 88 | 0 |
| GARDNER CITY OF | 74 | 0 |
| FRADETS ORCHARD WATER SYSTEM | 56 | 0 |
| COUNTRY ACRES WATER CO | 50 | 1 |
TRI Facilities (18)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Cargill Inc | 464.4K lbs |
| 2 | Tharaldson Ethanol Plant I LLC | 244.4K lbs |
| 3 | Marvin Composites LLC | 28.3K lbs |
| 4 | Truenorth Steel | 15.8K lbs |
| 5 | Cass Clay Creamery Inc | 14.0K lbs |
| 6 | Truenorth Steel - Fargo | 6.8K lbs |
| 7 | Holcim - Mwr Inc. Fargo Ready Mix | 3.2K lbs |
| 8 | Cnh Industrial America LLC | 2.2K lbs |
| 9 | Caterpillar Remanufacturing Drivetrain LLC | 1.3K lbs |
| 10 | US Cbp Pembina Port of Entry ND0014 | 591 lbs |
| 11 | Northern Plains Steel Co | 178 lbs |
| 12 | Trail King Industries Inc. | 100 lbs |
| 13 | Flint Hills Resources Pine Bend LLC West Fargo | 29 lbs |
| 14 | Strata Concrete West Fargo | 12 lbs |
| 15 | John Deere Isg Fargo | 5 lbs |
| 16 | Parksite Treating Plant | 0 lbs |
| 17 | Cardinal Glass Ig | 0 lbs |
| 18 | Spaceage Synthetics Ltd | 0 lbs |
Cities in Cass (4)
Frequently Asked Questions
What is the environmental risk level in Cass, North Dakota? ▼
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How many toxic release facilities are in Cass? ▼
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What environmental agencies cover Cass? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.