Gunnison, CO
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 Gunnison in Colorado · Population: 17,158
SDWIS systems such as GUNNISON CITY OF; MOUNT CRESTED BUTTE WSD; CRESTED BUTTE TOWN OF; NPL sites such as Standard Mine anchor Gunnison, CO's EPA extract. Derived burden score 17/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
No TRI Form R facilities sit in Gunnison in this extract; water coverage still lists GUNNISON CITY OF; MOUNT CRESTED BUTTE WSD; CRESTED BUTTE TOWN OF. AQS monitors logged median AQI 47 / peak 100 in 2024.
Burden score 17/100 (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 Gunnison -- 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 | 243 (66%) | 123 | 0 | 100 |
| 2023 | 251 (69%) | 112 | 0 | 93 |
| 2022 | 281 (77%) | 82 | 2 | 108 |
| 2021 | 262 (72%) | 102 | 1 | 101 |
| 2020 | 270 (81%) | 62 | 3 | 115 |
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 Colorado, see the EPA's AirNow.gov.
Water Systems (18)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| GUNNISON CITY OF | 9,610 | 0 |
| MOUNT CRESTED BUTTE WSD | 3,296 | 0 |
| CRESTED BUTTE TOWN OF | 2,440 | 0 |
| CRESTED BUTTE SOUTH | 2,000 | 0 |
| GUNNISON COUNTY WSD | 800 | 0 |
| EVERGREEN LAKE COMPANY | 431 | 10 |
| RIVERLAND LOT OWNERS ASSOC | 368 | 0 |
| SKYLAND MD | 335 | 0 |
| ANTELOPE HILLS ASSOC | 265 | 0 |
| MERIDIAN LAKE PARK | 250 | 0 |
| BUCKHORN RANCH WS | 205 | 3 |
| LARKSPUR SUBD | 118 | 0 |
| SKI TOWN VILLAGE | 113 | 1 |
| PONDEROSA PARK ASSOC | 100 | 0 |
| SOMERSET DOMESTIC WD | 100 | 26 |
| NORTH VALLEY SUBDIVISION UTILITY COMPANY | 79 | 0 |
| SADDLE RIDGE RANCH ESTATES WC | 55 | 0 |
| RIVER GREEN POA | 47 | 0 |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Standard Mine | NPL Site | 50.00 |
Cities in Gunnison (7)
Frequently Asked Questions
What is the environmental risk level in Gunnison, Colorado? ▼
Are there Superfund sites in Gunnison? ▼
How many toxic release facilities are in Gunnison? ▼
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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.