Cass, ND
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Cass in North Dakota · Population: 189,286
TRI sites such as Cargill Inc; Tharaldson Ethanol Plant I LLC; Marvin Composites LLC; SDWIS systems such as FARGO CITY OF; WEST FARGO CITY OF; CASS RURAL WATER DISTRICT FARGO anchor Cass, ND's EPA extract. Derived burden score 44/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Cass include FARGO CITY OF; HARWOOD CITY OF; ARGUSVILLE CITY OF, while Cargill Inc leads reported TRI pounds among local Form R filers. AQS median AQI 38 / peak 158 in 2024.
Burden score 44/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Cass -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Cass, ND: EPA TRI 2023 reporting year
Same facilities, both years
+6.8%
15 facilities that filed in 2022 and 2023
Whole inventory
+16.0%
170.5 thousand lb → 197.8 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Cass, ND's total reported releases rose from 170.5 thousand lb in 2022 to 182.0 thousand lb in 2023, based on EPA TRI filings.
- Cass, ND's land releases rose from 399 lb in 2022 to 838 lb in 2023, based on EPA TRI filings.
- Cass, ND's water releases fell from 24 lb in 2022 to 13 lb in 2023, based on EPA TRI filings.
- Cass, ND's off-site transfers fell from 5.1 thousand lb in 2022 to 4.8 thousand lb in 2023, based on EPA TRI filings.
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 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 | System pop (SDWIS) | 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 (16)
Frequently Asked Questions
What is the environmental risk level in Cass, North Dakota? ▼
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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.