Mckenzie, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Mckenzie in North Dakota · Population: 14,280
TRI sites such as Oneok Rockies Midstream LLC - Grasslands Gas Plant; Garden Creek Gas Plant; Demicks Lake Gas Plant; SDWIS systems such as WATFORD CITY CITY OF; MCKENZIE COUNTY WRD; ALEXANDER CITY OF anchor Mckenzie, ND's EPA extract. Derived burden score 43/100 (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 Mckenzie include ALEXANDER CITY OF; WATFORD RESIDENCE SUITES, while Oneok Rockies Midstream LLC - Grasslands Gas Plant leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 172 in 2024.
Burden score 43/100 (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 Mckenzie -- 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 Mckenzie, ND: EPA TRI 2023 reporting year
Same facilities, both years
-6.7%
10 facilities that filed in 2022 and 2023
Whole inventory
-6.7%
14.0 million lb → 13.1 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Mckenzie, ND's total reported releases fell from 14.0 million lb in 2022 to 13.1 million lb in 2023, based on EPA TRI filings.
- Mckenzie, ND's off-site transfers rose from 61.4 thousand lb in 2022 to 117.2 thousand lb in 2023, based on EPA TRI filings.
- Mckenzie, ND's air releases rose from 58.9 thousand lb in 2022 to 68.2 thousand lb in 2023, based on EPA TRI filings.
- Mckenzie, ND's chemicals reported rose from 10 in 2022 to 11 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 | 300 (82%) | 58 | 6 | 172 |
| 2023 | 277 (76%) | 72 | 10 | 298 |
| 2022 | 294 (89%) | 37 | 0 | 75 |
| 2021 | 286 (80%) | 62 | 6 | 183 |
| 2020 | 346 (95%) | 17 | 0 | 66 |
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 (5)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WATFORD CITY CITY OF | 6,390 | 0 |
| MCKENZIE COUNTY WRD | 3,895 | 0 |
| ALEXANDER CITY OF | 1,335 | 1 |
| WATFORD RESIDENCE SUITES | 32 | 1 |
| ARNEGARD CITY OF | 28 | 0 |
TRI Facilities (11)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Oneok Rockies Midstream LLC - Grasslands Gas Plant | 26.9M lbs |
| 2 | Garden Creek Gas Plant | 56.0K lbs |
| 3 | Demicks Lake Gas Plant | 49.3K lbs |
| 4 | Watford City Plant | 34.4K lbs |
| 5 | Lonesome Creek Gas Plant | 28.1K lbs |
| 6 | Little Missouri Gas Plant | 19.2K lbs |
| 7 | Arrow Cdp | 18.5K lbs |
| 8 | Wild Basin Gas Processing &crude Handling Facility | 17.6K lbs |
| 9 | Red Wing Creek II Gas Plant | 8.6K lbs |
| 10 | Roosevelt Gas Plant | 5.5K lbs |
| 11 | Bear Den Gas Plant | 3.6K lbs |
Cities in Mckenzie (4)
Frequently Asked Questions
What is the environmental risk level in Mckenzie, North Dakota? ▼
Are there Superfund sites in Mckenzie? ▼
How many toxic release facilities are in Mckenzie? ▼
What is the air quality in Mckenzie? ▼
Is the drinking water safe in Mckenzie? ▼
What environmental agencies cover Mckenzie? ▼
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.