Mille Lacs, 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.
Environmental data for Mille Lacs in Minnesota · Population: 26,912
TRI sites such as Cemstone - Isle; Mar Tek Electronics; Knife River Milaca Ready Mix; SDWIS systems such as Princeton; VINELAND; Milaca anchor Mille Lacs, MN's EPA extract. Derived burden score 2/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Cemstone - Isle; Mar Tek Electronics; Knife River Milaca Ready Mix are among the largest Form R filers reporting in Mille Lacs; no SDWIS system here carries an active health-based flag. AQS median AQI 36 / peak 67 in 2024.
Burden score 2/100 (Low 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 Mille Lacs -- 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.
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 | 73 (99%) | 1 | 0 | 67 |
| 2023 | 213 (90%) | 19 | 5 | 136 |
| 2022 | 151 (100%) | 0 | 0 | 48 |
| 2021 | 232 (95%) | 13 | 0 | 71 |
| 2020 | 240 (98%) | 5 | 0 | 87 |
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 (12)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| Princeton | 5,421 | 0 |
| VINELAND | 4,220 | 0 |
| Milaca | 3,043 | 0 |
| Onamia | 831 | 0 |
| HINCKLEY | 400 | 0 |
| Foreston | 340 | 0 |
| Pease | 242 | 0 |
| Jackson Heights Mobile Home Park | 220 | 0 |
| Sherburne Village | 200 | 0 |
| Bock | 83 | 0 |
| Green Acres Mobile Home Park | 80 | 0 |
| APPLE ORCHARD | 55 | 0 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Cemstone - Isle | 0 lbs |
| 2 | Mar Tek Electronics | 0 lbs |
| 3 | Knife River Milaca Ready Mix | 0 lbs |
Cities in Mille Lacs (6)
Frequently Asked Questions
What is the environmental risk level in Mille Lacs, Minnesota? ▼
Are there Superfund sites in Mille Lacs? ▼
How many toxic release facilities are in Mille Lacs? ▼
What is the air quality in Mille Lacs? ▼
Is the drinking water safe in Mille Lacs? ▼
What environmental agencies cover Mille Lacs? ▼
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.