Mercer, 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 Mercer in North Dakota · Population: 8,341
TRI sites such as Basin Electric Antelope Valley Station; Basin Electric Leland Olds Station; Otter Tail Power Co Coyote Station; SDWIS systems such as BEULAH CITY OF; HAZEN CITY OF; STANTON CITY OF anchor Mercer, ND's EPA extract. Derived burden score 39/100 (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 Mercer include STANTON CITY OF; ZAP CITY OF, while Basin Electric Antelope Valley Station leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 167 in 2024.
Burden score 39/100 (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 Mercer -- 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 Mercer, ND: EPA TRI 2023 reporting year
Same facilities, both years
-16.8%
3 facilities that filed in 2022 and 2023
Whole inventory
-16.8%
37.0 million lb → 30.8 million lb, every facility that filed
- Mercer, ND's total reported releases fell from 37.0 million lb in 2022 to 30.8 million lb in 2023, based on EPA TRI filings.
- Mercer, ND's off-site transfers fell from 10.1 million lb in 2022 to 7.7 million lb in 2023, based on EPA TRI filings.
- Mercer, ND's water releases rose from 1.3 thousand lb in 2022 to 1.6 thousand lb in 2023, based on EPA TRI filings.
- Mercer, ND's air releases fell from 19.6 million lb in 2022 to 16.8 million 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 | 304 (83%) | 56 | 4 | 167 |
| 2023 | 252 (69%) | 97 | 10 | 322 |
| 2022 | 318 (87%) | 47 | 0 | 72 |
| 2021 | 279 (76%) | 77 | 5 | 174 |
| 2020 | 328 (90%) | 38 | 0 | 78 |
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 (6)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| BEULAH CITY OF | 3,058 | 0 |
| HAZEN CITY OF | 2,411 | 0 |
| STANTON CITY OF | 366 | 1 |
| ZAP CITY OF | 237 | 2 |
| GOLDEN VALLEY CITY OF | 182 | 0 |
| PICK CITY CITY OF | 123 | 0 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Basin Electric Antelope Valley Station | 167.8M lbs |
| 2 | Basin Electric Leland Olds Station | 5.6M lbs |
| 3 | Otter Tail Power Co Coyote Station | 4.1M lbs |
Cities in Mercer (6)
Frequently Asked Questions
What is the environmental risk level in Mercer, North Dakota? ▼
Are there Superfund sites in Mercer? ▼
How many toxic release facilities are in Mercer? ▼
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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.