Washington, MN
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 Washington in Minnesota · Population: 272,298
TRI sites such as 3M Chemical Operations' Cottage Grove Facility; Xcel Energy A. S. King Generating Plant; St Paul Park Refining Co LLC; SDWIS systems such as Woodbury; Cottage Grove; Oakdale; NPL sites such as Baytown Township Ground Water Plume; Oakdale Dump; Washington County Landfill anchor Washington, MN's EPA extract. Derived burden score 56/100 (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 Washington include Preserve at Birch Lake, while 3M Chemical Operations' Cottage Grove Facility leads reported TRI pounds among local Form R filers. AQS median AQI 35 / peak 58 in 2024.
Burden score 56/100 (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 Washington -- 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 Washington, MN: EPA TRI 2023 reporting year
Same facilities, both years
+42.4%
11 facilities that filed in 2022 and 2023
Whole inventory
+52.0%
857.4 thousand lb → 1.3 million lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Washington, MN's total reported releases rose from 856.8 thousand lb in 2022 to 1.2 million lb in 2023, based on EPA TRI filings.
- Washington, MN's water releases rose from 265.1 thousand lb in 2022 to 700.8 thousand lb in 2023, based on EPA TRI filings.
- Washington, MN's land releases fell from 832 lb in 2022 to 317 lb in 2023, based on EPA TRI filings.
- Washington, MN's off-site transfers fell from 295.7 thousand lb in 2022 to 239.7 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 | 241 (98%) | 5 | 0 | 58 |
| 2023 | 194 (81%) | 38 | 8 | 140 |
| 2022 | 212 (93%) | 15 | 0 | 90 |
| 2021 | 205 (90%) | 21 | 1 | 119 |
| 2020 | 210 (98%) | 5 | 0 | 77 |
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 Minnesota, see the EPA's AirNow.gov.
Water Systems (30)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| Woodbury | 82,643 | 0 |
| Cottage Grove | 42,760 | 0 |
| Oakdale | 30,144 | 0 |
| Stillwater | 19,462 | 0 |
| Lake Elmo | 10,978 | 0 |
| Mahtomedi | 8,818 | 0 |
| Saint Paul Park | 5,427 | 0 |
| Oak Park Heights | 4,776 | 0 |
| Newport | 4,000 | 0 |
| Centerville | 3,962 | 0 |
| Lakeland Municipal Water | 3,500 | 0 |
| Bayport | 2,700 | 0 |
| Cimarron Park | 2,400 | 0 |
| MN Correctional Facility - Stillwater | 781 | 0 |
| Brookside Mobile Home Park | 550 | 0 |
| Willernie | 525 | 0 |
| Preserve at Birch Lake | 388 | 1 |
| Woodlund Mobile Home Park | 330 | 0 |
| Hugo Estates | 300 | 0 |
| Baldwin Lake Estates | 235 | 0 |
| Indian Hills Development | 156 | 0 |
| Jackson Meadow | 95 | 0 |
| Sun Bay LLC | 90 | 0 |
| Bay Lake Reserve Development | 80 | 0 |
| Oakhill Cottages | 65 | 0 |
| Lazy Acres Trailer Park | 50 | 0 |
| Hilltop Water Company | 50 | 0 |
| Scandia Water Company | 35 | 0 |
| Marine Stugas Townhomes | 28 | 0 |
| Cedar Terrace Mobile Home Park | 25 | 0 |
TRI Facilities (18)
| # | Facility | Total Releases |
|---|---|---|
| 1 | 3M Chemical Operations' Cottage Grove Facility | 3.0M lbs |
| 2 | Xcel Energy A. S. King Generating Plant | 1.3M lbs |
| 3 | St Paul Park Refining Co LLC | 945.3K lbs |
| 4 | Andersen Corp | 318.8K lbs |
| 5 | Lsp - Cottage Grove LP | 152.9K lbs |
| 6 | Advance Corp | 23.6K lbs |
| 7 | Inliner Solutions LLC | 2.6K lbs |
| 8 | Holcim - Mwr Inc. Newport Ready Mix | 2.2K lbs |
| 9 | Knife River Corp N Central Forest Lake | 294 lbs |
| 10 | Ayrshire Electronics Mn | 5 lbs |
| 11 | Cemstone Lakeland | 5 lbs |
| 12 | Hearing Components Inc. | 3 lbs |
| 13 | Up North Plastics Inc | 0 lbs |
| 14 | East Side Jersey Dairy | 0 lbs |
| 15 | Aveka Cce Technologies | 0 lbs |
| 16 | Aveka Inc | 0 lbs |
| 17 | Airgas | 0 lbs |
| 18 | The Vollrath Co. LLC | 0 lbs |
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| Baytown Township Ground Water Plume | NPL Site | 35.62 |
| Oakdale Dump | NPL Site | 55.71 |
| Washington County Landfill | Deleted NPL Site | 42.24 |
Cities in Washington (18)
Frequently Asked Questions
What is the environmental risk level in Washington, Minnesota? ▼
Are there Superfund sites in Washington? ▼
How many toxic release facilities are in Washington? ▼
What is the air quality in Washington? ▼
Is the drinking water safe in Washington? ▼
What environmental agencies cover Washington? ▼
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.