Larimer, 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 Larimer in Colorado · Population: 363,561
TRI sites such as Rawhide Energy Station; Fort Collins Brewery; Avago Technologies Inc Fort Collins Colorado; SDWIS systems such as FT COLLINS CITY OF; LOVELAND CITY OF; FT COLLINS LOVELAND WD anchor Larimer, CO's EPA extract. Derived burden score 46/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Larimer include FT COLLINS CITY OF; ESTES PARK TOWN OF; BERTHOUD TOWN OF, while Rawhide Energy Station leads reported TRI pounds among local Form R filers. AQS median AQI 54 / peak 161 in 2024.
Burden score 46/100 (Moderate 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 Larimer -- 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 Larimer, CO: EPA TRI 2023 reporting year
Same facilities, both years
-83.1%
12 facilities that filed in 2022 and 2023
Whole inventory
-83.0%
683.4 thousand lb → 116.4 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Larimer, CO's total reported releases fell from 683.4 thousand lb in 2022 to 115.7 thousand lb in 2023, based on EPA TRI filings.
- Larimer, CO's land releases fell from 642.3 thousand lb in 2022 to 83.4 thousand lb in 2023, based on EPA TRI filings.
- Larimer, CO's off-site transfers fell from 22.1 thousand lb in 2022 to 16.1 thousand lb in 2023, based on EPA TRI filings.
- Larimer, CO's air releases fell from 19.0 thousand lb in 2022 to 16.1 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 | 156 (43%) | 187 | 21 | 161 |
| 2023 | 175 (48%) | 185 | 4 | 156 |
| 2022 | 176 (48%) | 179 | 10 | 126 |
| 2021 | 164 (45%) | 151 | 46 | 159 |
| 2020 | 197 (54%) | 147 | 20 | 159 |
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 (34)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| FT COLLINS CITY OF | 179,901 | 2 |
| LOVELAND CITY OF | 91,077 | 0 |
| FT COLLINS LOVELAND WD | 63,532 | 0 |
| LITTLE THOMPSON WD | 25,654 | 0 |
| ESTES PARK TOWN OF | 16,722 | 3 |
| BERTHOUD TOWN OF | 14,211 | 6 |
| WELLINGTON TOWN OF | 11,720 | 12 |
| NORTHERN COLORADO WA | 4,675 | 0 |
| WEST FORT COLLINS WD | 4,000 | 0 |
| YMCA ROCKIES WIND RIVER | 3,730 | 19 |
| SPRING CANYON WSD | 2,320 | 1 |
| TIMBER RIDGE MHP | 1,736 | 0 |
| PINE BLUFFS, TOWN OF | 1,186 | 10 |
| RMNP HEADQUARTERS EAST | 900 | 0 |
| SKYLINE | 402 | 0 |
| CONSOLIDATED GLACIER VIEW MEADOWS ASSOC | 395 | 0 |
| WINDCLIFF POA | 339 | 0 |
| NORTH CARTER LAKE WD | 328 | 0 |
| ALPINE VISTA VILLAGE | 313 | 0 |
| NUEVA VIDA MOBILE HOME PARK | 266 | 3 |
| ANNUNCIATION HEIGHTS | 260 | 47 |
| MOUNTAIN VIEW MHP | 211 | 0 |
| CASTLE PARK MHP | 191 | 0 |
| NEWELL WARNOCK WA | 160 | 3 |
| SERENITY RIDGE VAULT CONNECTION | 157 | 0 |
| MEADOW VILLAGE MOBILE HOME PARK | 150 | 1 |
| SHIRE MOBILE HOME PARK | 150 | 1 |
| SHAMBHALA MOUNTAIN CENTER | 90 | 18 |
| EDEN VALLEY INSTITUTE | 80 | 16 |
| SUNRISE RANCH | 75 | 3 |
| MOUNTAIN VIEW ESTATES (KNECHT INVTS) | 75 | 5 |
| PINEWOOD MOBILE HOME PARK | 65 | 0 |
| CARTER LAKE FILTER PLANT | 11 | 0 |
| SOLDIER CANYON FILTER PLANT | 0 | 0 |
TRI Facilities (18)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Rawhide Energy Station | 2.6M lbs |
| 2 | Fort Collins Brewery | 108.2K lbs |
| 3 | Avago Technologies Inc Fort Collins Colorado | 91.9K lbs |
| 4 | Holcim Wcr Inc Drake Ready Mix Plant | 998 lbs |
| 5 | Hach Co Loveland | 108 lbs |
| 6 | Tanco Engineering Inc. | 30 lbs |
| 7 | Woodward Inc | 4 lbs |
| 8 | Martin Marietta - Taft Asphalt | 2 lbs |
| 9 | Woodward Inc | 2 lbs |
| 10 | Martin Marietta Rigden Ready Mix | 0 lbs |
| 11 | Summit View Ready Mix | 0 lbs |
| 12 | Ranch-Way Feed Mills | 0 lbs |
| 13 | Advanced Energy Industries Inc | 0 lbs |
| 14 | National Institute of Standards & Technology Wwv/wwvb | 0 lbs |
| 15 | Allweater Wood LLC | 0 lbs |
| 16 | Metal Castings of Colorado Inc. | 0 lbs |
| 17 | Oldcastle Infrastructure | 0 lbs |
| 18 | Loveland Ready Mix | 0 lbs |
Cities in Larimer (8)
Frequently Asked Questions
What is the environmental risk level in Larimer, Colorado? ▼
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How many toxic release facilities are in Larimer? ▼
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What environmental agencies cover Larimer? ▼
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.