Carbon, 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.
Environmental data for Carbon in Wyoming · Population: 14,549
TRI sites such as Hf Sinclair Parco Refining LLC; Echo Springs Gas Plant; Peak Asphalt LLC Rawlins Plant; SDWIS systems such as RAWLINS WATER SUPPLY, CITY OF; SARATOGA, TOWN OF; HANNA, TOWN OF anchor Carbon, WY's EPA extract. Derived burden score 40/100 (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 Carbon include RAWLINS WATER SUPPLY, CITY OF; SARATOGA, TOWN OF; ENCAMPMENT, TOWN OF, while Hf Sinclair Parco Refining LLC leads reported TRI pounds among local Form R filers. AQS median AQI 8 / peak 35 in 2024.
Burden score 40/100 (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 Carbon -- 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 Carbon, WY: EPA TRI 2023 reporting year
Same facilities, both years
+12.3%
3 facilities that filed in 2022 and 2023
Whole inventory
+12.3%
441.7 thousand lb → 496.1 thousand lb, every facility that filed
- Carbon, WY's total reported releases rose from 441.7 thousand lb in 2022 to 496.1 thousand lb in 2023, based on EPA TRI filings.
- Carbon, WY's land releases fell from 5.3 thousand lb in 2022 to 623 lb in 2023, based on EPA TRI filings.
- Carbon, WY's air releases rose from 320.6 thousand lb in 2022 to 398.4 thousand lb in 2023, based on EPA TRI filings.
- Carbon, WY's off-site transfers fell from 115.8 thousand lb in 2022 to 97.1 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 | 356 (100%) | 0 | 0 | 35 |
| 2023 | 362 (100%) | 0 | 0 | 33 |
| 2022 | 361 (100%) | 0 | 0 | 27 |
| 2021 | 348 (100%) | 0 | 0 | 37 |
| 2020 | 304 (100%) | 0 | 0 | 31 |
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 (11)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| RAWLINS WATER SUPPLY, CITY OF | 9,006 | 8 |
| SARATOGA, TOWN OF | 1,720 | 5 |
| HANNA, TOWN OF | 841 | 0 |
| ENCAMPMENT, TOWN OF | 450 | 1 |
| SINCLAIR, TOWN OF | 433 | 0 |
| BAGGS, TOWN OF | 400 | 50 |
| MEDICINE WATERS VILLAGE | 200 | 1 |
| ELK MOUNTAIN, TOWN OF | 191 | 2 |
| MEDICINE BOW, TOWN OF | 189 | 4 |
| SIERRA MADRE JPB | 130 | 0 |
| DIXON, TOWN OF | 114 | 93 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Hf Sinclair Parco Refining LLC | 1.5M lbs |
| 2 | Echo Springs Gas Plant | 235.3K lbs |
| 3 | Peak Asphalt LLC Rawlins Plant | 47 lbs |
Cities in Carbon (10)
Frequently Asked Questions
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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.