Laramie, WY
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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Laramie in Wyoming · Population: 100,661
TRI sites such as Dyno Nobel Inc-Cheyenne Plant; Cheyenne Renewable Diesel Co LLC; Brenntag Pacific Inc.; SDWIS systems such as CHEYENNE BOARD OF PUBLIC UTILITIES; SOUTH CHEYENNE WATER & SEWER DISTRICT; USAF F.E. WARREN AFB; NPL sites such as F.E. Warren Air Force Base anchor Laramie, WY's EPA extract. Derived burden score 54/100 (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 Laramie include ORCHARD VALLEY WATER COMPANY; ALBIN, TOWN OF; HIDE-A-WAY MOBILE VILLAGE, while Dyno Nobel Inc-Cheyenne Plant leads reported TRI pounds among local Form R filers. AQS median AQI 45 / peak 151 in 2024.
Burden score 54/100 (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 Laramie -- 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 Laramie, WY: EPA TRI 2023 reporting year
Same facilities, both years
+37.2%
9 facilities that filed in 2022 and 2023
Whole inventory
+37.2%
4.4 million lb → 6.1 million lb, every facility that filed
- Laramie, WY's total reported releases rose from 4.4 million lb in 2022 to 6.1 million lb in 2023, based on EPA TRI filings.
- Laramie, WY's off-site transfers rose from 264 lb in 2022 to 2.5 thousand lb in 2023, based on EPA TRI filings.
- Laramie, WY's land releases rose from 3.7 million lb in 2022 to 5.4 million lb in 2023, based on EPA TRI filings.
- Laramie, WY's chemicals reported rose from 28 in 2022 to 29 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 | 271 (74%) | 91 | 3 | 151 |
| 2023 | 275 (75%) | 85 | 4 | 156 |
| 2022 | 297 (82%) | 66 | 0 | 90 |
| 2021 | 261 (72%) | 92 | 11 | 126 |
| 2020 | 313 (86%) | 48 | 3 | 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 Wyoming, see the EPA's AirNow.gov.
Water Systems (15)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CHEYENNE BOARD OF PUBLIC UTILITIES | 64,165 | 0 |
| SOUTH CHEYENNE WATER & SEWER DISTRICT | 10,000 | 0 |
| USAF F.E. WARREN AFB | 5,500 | 0 |
| BURNS BOARD OF PUBLIC UTILITIES | 1,024 | 0 |
| BIG COUNTRY ESTATES | 615 | 0 |
| CIMMARON VILLAGE | 327 | 0 |
| ORCHARD VALLEY WATER COMPANY | 260 | 2 |
| ALBIN, TOWN OF | 181 | 3 |
| ENGLEWOOD VILLAGE MHP | 152 | 0 |
| HIGHLAND RANCH ESTATES | 128 | 0 |
| HIDE-A-WAY MOBILE VILLAGE | 107 | 3 |
| CARPENTER W&S DISTRICT | 94 | 1 |
| RESTWAY TRAVEL PARK | 62 | 3 |
| EVERGREEN MOBILE HOME PARK | 35 | 2 |
| MILLER LOWER MOBILE HOME PARK | 30 | 1 |
TRI Facilities (9)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Dyno Nobel Inc-Cheyenne Plant | 27.1M lbs |
| 2 | Cheyenne Renewable Diesel Co LLC | 241.6K lbs |
| 3 | Brenntag Pacific Inc. | 5.4K lbs |
| 4 | Knife River Cheyenne | 1.2K lbs |
| 5 | U.S. Dod Usaf Wyoming Ang | 334 lbs |
| 6 | Voestalpine Railway Systems Nortrak Inc. | 78 lbs |
| 7 | US Dod Usaf Fe Warren Afb (part) | 28 lbs |
| 8 | Ergon Asphalt & Emulsions Inc. - Cheyenne | 14 lbs |
| 9 | Crafco Inc. - Cheyenne | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| F.E. Warren Air Force Base | NPL Site | 39.23 |
Cities in Laramie (4)
Frequently Asked Questions
What is the environmental risk level in Laramie, Wyoming? ▼
Are there Superfund sites in Laramie? ▼
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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.