Hennepin, 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 Hennepin in Minnesota · Population: 1,268,903
Hennepin, MN is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 62 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 71/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 4.6M lbs of reported toxic releases under EPCRA Section 313, while 5 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 42 and a peak AQI of 166 in 2024, with 66% 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 | 243 (66%) | 119 | 3 | 166 |
| 2023 | 173 (47%) | 175 | 14 | 187 |
| 2022 | 244 (67%) | 121 | 0 | 96 |
| 2021 | 213 (58%) | 149 | 0 | 157 |
| 2020 | 206 (56%) | 158 | 1 | 158 |
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 (62)
| System | Population | Violations |
|---|---|---|
| Minneapolis | 425,300 | 0 |
| Bloomington | 91,300 | 0 |
| Brooklyn Park | 89,995 | 0 |
| Plymouth | 81,026 | 0 |
| Maple Grove | 75,000 | 0 |
| Eden Prairie | 63,726 | 0 |
| Minnetonka | 54,474 | 0 |
| Edina | 53,494 | 0 |
| Saint Louis Park | 50,010 | 0 |
| Richfield | 36,899 | 0 |
| Brooklyn Center | 33,782 | 0 |
| Champlin | 24,007 | 0 |
| Golden Valley | 23,000 | 0 |
| Crystal | 22,937 | 0 |
| New Hope | 20,963 | 0 |
| Hopkins | 19,462 | 0 |
| Robbinsdale | 14,646 | 0 |
| Rogers | 14,430 | 0 |
| Saint Anthony Village | 9,500 | 0 |
| Mound | 9,447 | 0 |
| Minnetrista | 5,888 | 0 |
| Dayton | 4,930 | 0 |
| Wayzata | 4,592 | 0 |
| Medina | 4,205 | 0 |
| Shorewood | 3,890 | 0 |
| Orono | 3,062 | 0 |
| Corcoran | 2,964 | 0 |
| Osseo | 2,650 | 0 |
| Excelsior | 2,483 | 0 |
| Saint Bonifacius | 2,374 | 0 |
| Maple Plain | 2,174 | 0 |
| Spring Park | 1,743 | 0 |
| Long Lake | 1,729 | 0 |
| Tonka Bay | 1,442 | 0 |
| Riverview Apartment Partnership | 700 | 0 |
| Loretto | 637 | 0 |
| Crown College | 520 | 0 |
| Sun Valley Mobile Home Park | 500 | 0 |
| HEATHERWOOD TERRACE TOWNHOUSES | 435 | 0 |
| Rockwood Estates | 400 | 0 |
| Clearwater Forest Mobile Home Park | 367 | 0 |
| Greenfield | 313 | 3 |
| 12 Hi Mobile Home Park | 300 | 0 |
| Wyoming Park LLC | 225 | 0 |
| Shores of Eagle Lake | 160 | 0 |
| Blue Waters Leisure Park | 150 | 0 |
| COUNTRY COVE COURT LLC | 150 | 0 |
| Countryside Estates | 116 | 0 |
| HARMONY HILLS MH VILLAGE | 100 | 0 |
| Garrison Bay Resort | 90 | 0 |
| ROLLING HILLS MHP LLC | 90 | 0 |
| West Broadway Apartments | 80 | 0 |
| Windsor Oaks Development | 80 | 0 |
| COUNTRY VIEW HOLDINGS LLC | 75 | 1 |
| Chosen Valley Mobile Home Park | 73 | 0 |
| Wyldewood Acres | 70 | 0 |
| EQUINOX REI LLC DELLWOOD ESTATES | 70 | 0 |
| Majestic Greens LLC Senior Living (Apt.) | 67 | 0 |
| HILLTOP ESTATES MHP | 64 | 1 |
| COACH RUN CONDOS | 60 | 1 |
| CROFT BAY VILLAGE | 48 | 3 |
| FOUNTAIN BLUFFS MHP LLC | 25 | 0 |
TRI Facilities (50)
Cities in Hennepin (19)
Frequently Asked Questions
What is the environmental risk level in Hennepin, Minnesota? ▼
Are there Superfund sites in Hennepin? ▼
How many toxic release facilities are in Hennepin? ▼
What is the air quality in Hennepin? ▼
Is the drinking water safe in Hennepin? ▼
What environmental agencies cover Hennepin? ▼
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.