Lyon, 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 Lyon in Minnesota · Population: 25,498
TRI sites such as Legend Cabinetry; Archer Daniels Midland Co; Flint Hills Resources Pine Bend LLC Marshall; SDWIS systems such as Marshall; Tracy; Minneota anchor Lyon, MN's EPA extract. Derived burden score 21/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Legend Cabinetry; Archer Daniels Midland Co; Flint Hills Resources Pine Bend LLC Marshall are among the largest Form R filers reporting in Lyon; no SDWIS system here carries an active health-based flag. AQS median AQI 40 / peak 142 in 2024.
Burden score 21/100 (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 Lyon -- 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 Lyon, MN: EPA TRI 2023 reporting year
Same facilities, both years
+8.9%
5 facilities that filed in 2022 and 2023
Whole inventory
+8.9%
9.1 thousand lb → 9.9 thousand lb, every facility that filed
- Lyon, MN's total reported releases rose from 9.1 thousand lb in 2022 to 9.9 thousand lb in 2023, based on EPA TRI filings.
- Lyon, MN's chemicals reported rose from 12 in 2022 to 15 in 2023, based on EPA TRI filings.
- Lyon, MN's air releases rose from 9.0 thousand lb in 2022 to 9.8 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 | 276 (75%) | 88 | 2 | 142 |
| 2023 | 206 (57%) | 142 | 10 | 173 |
| 2022 | 303 (85%) | 51 | 0 | 172 |
| 2021 | 263 (73%) | 91 | 3 | 187 |
| 2020 | 309 (86%) | 51 | 0 | 80 |
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 |
|---|---|---|
| Marshall | 13,890 | 0 |
| Tracy | 2,154 | 0 |
| Minneota | 1,380 | 0 |
| Cottonwood | 1,212 | 0 |
| Balaton | 639 | 0 |
| Lynd | 448 | 0 |
| Ghent | 370 | 0 |
| Russell | 338 | 0 |
| Garvin | 135 | 0 |
| Saint Leo | 97 | 0 |
| Fairview Township Water Association | 89 | 0 |
| Florence | 39 | 0 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Legend Cabinetry | 35.1K lbs |
| 2 | Archer Daniels Midland Co | 5.5K lbs |
| 3 | Flint Hills Resources Pine Bend LLC Marshall | 72 lbs |
| 4 | Hirel Systems Llc-Marshall | 0 lbs |
| 5 | Midwest Ag Supplements Marshall Feed | 0 lbs |
Cities in Lyon (10)
Frequently Asked Questions
What is the environmental risk level in Lyon, Minnesota? ▼
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How many toxic release facilities are in Lyon? ▼
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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.