Washington, MN
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Washington in Minnesota · Population: 272,298
Washington, MN is tracked across three EPA datasets covering 18 Toxics Release Inventory (TRI) facilities, 30 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 41/100 (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 5.7M lbs of reported toxic releases under EPCRA Section 313, while 1 water system carries an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 35 and a peak AQI of 58 in 2024, with 98% 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 | 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 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 | Population | Violations |
|---|---|---|
| Woodbury | 82,643 | 0 |
| Cottage Grove | 39,712 | 0 |
| Oakdale | 28,674 | 0 |
| Stillwater | 19,462 | 0 |
| Lake Elmo | 10,978 | 0 |
| Mahtomedi | 8,134 | 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 |
| Scandia Water Company | 35 | 0 |
| Marine Stugas Townhomes | 28 | 0 |
| Cedar Terrace Mobile Home Park | 25 | 0 |
| Hilltop Water Company | 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 |
Cities in Washington (8)
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.