TRI Facilities
78
EPCRA Section 313 reporters
2023 EPA TRI data 78 facilities 316 water systems
Wyoming Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Wyoming's (WY) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
WY regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
123 records
- RCRA · Subtitle C 3
RCRA Subtitle C (Superfund-site proxy)
3 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
316
SDWIS regulated
Superfund Sites
3
1 active NPL
Total Releases
93.9M lbs
TRI cumulative disclosure
Compliance Snapshot - WY
Sites with no recorded health violations 68.8%
Sites with at least one open violation 31.2%
Wyoming consolidates three federal EPA datasets into one statewide environmental profile: 78 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 316 community water systems regulated under the Safe Drinking Water Act, and 3 sites on the Superfund National Priorities List.
TRI facilities in WY have cumulatively disclosed 93.9M lbs of toxic chemical releases, while SDWIS records show 713 total violations across the state's regulated water systems, of which 123 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Teton, Natrona, Lincoln, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
78
Water Systems
316
Superfund Sites
3
Total Violations
713
Total Releases
93.9M lbs
Health Violations
123
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Dyno Nobel Inc-Cheyenne Plant | 27.1M lbs |
| 2 | Basin Electric Laramie River Station | 13.0M lbs |
| 3 | Simplot Phosphates LLC | 10.3M lbs |
| 4 | Black Hills Corp - Neil Simpson Complex | 8.7M lbs |
| 5 | Pacificorp Dave Johnston Plant | 8.2M lbs |
| 6 | Pacificorp Jim Bridger Plant & Bridger Coal Co | 6.7M lbs |
| 7 | Basin Electric Dry Fork Station | 5.4M lbs |
| 8 | Pacificorp Wyodak Plant | 4.0M lbs |
| 9 | Pacificorp Naughton Plant | 2.4M lbs |
| 10 | Hf Sinclair Parco Refining LLC | 1.5M lbs |
| 11 | Crown Beverage Packaging | 1.4M lbs |
| 12 | Blacks Fork Gas Plant | 1.1M lbs |
| 13 | Steamboat Processing Facility | 1.0M lbs |
| 14 | Western Gas Resources Hilight Gas Plant | 993.2K lbs |
| 15 | Cheyenne Renewable Diesel Co LLC | 241.6K lbs |
| 16 | Echo Springs Gas Plant | 235.3K lbs |
| 17 | Opal Gas Plant | 213.0K lbs |
| 18 | Wyoming Sugar Co | 195.4K lbs |
| 19 | Carter Creek Gas Plant | 178.8K lbs |
| 20 | US Army Camp Guernsey Training Areas | 178.1K lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| DIXON, TOWN OF | 114 | 93 |
| LANCE CREEK WATER DISTRICT | 45 | 64 |
| BAGGS, TOWN OF | 400 | 48 |
| STONE CREEK HOA | 100 | 30 |
| COTTONWOOD ACRES | 95 | 28 |
| KEMMERER-DIAMONDVILLE JPB | 3,348 | 27 |
| LITTLE AMERICA HOTELS & RESORTS, INC- WY | 2,004 | 26 |
| YNP-OLD FAITHFUL | 7,675 | 25 |
| BUFFALO, CITY OF | 4,419 | 20 |
| COKEVILLE, TOWN OF | 535 | 17 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | 144 | 13 |
| KEY LARGO UTILITIES | 105 | 11 |
| ETHETE WATER SYSTEM | 1,950 | 10 |
| RIVERMEADOWS WATER DISTRICT | 100 | 10 |
| RED WATER DISTRIBUTION LLC | 35 | 9 |
| BROKEN WRENCH LLC | 30 | 9 |
| MILLS, CITY OF | 4,050 | 8 |
| RAWLINS WATER SUPPLY, CITY OF | 9,006 | 8 |
| POTLATCH TRAILER COURT | 70 | 8 |
| RIMROCK WATER COMPANY LLC | 365 | 7 |
| MANVILLE, TOWN OF | 97 | 7 |
| BURLINGTON, TOWN OF | 348 | 7 |
| GRANGER, TOWN OF | 139 | 6 |
| PAVILLION, TOWN OF | 230 | 6 |
| OSMOND I&S DISTRICT | 31 | 6 |
| LEISURE VALLEY INC/ STAR VALLEY RV PARK | 1,910 | 6 |
| ROZET RANCHETTES I&S DISTRICT | 85 | 6 |
| OWL CREEK WATER DISTRICT | 100 | 6 |
| SARATOGA, TOWN OF | 1,720 | 5 |
| HOY MOBILE HOME PARK | 100 | 5 |
| WHEATLAND, TOWN OF | 3,659 | 5 |
| LA BARGE, TOWN OF | 347 | 5 |
| STAR VALLEY RANCH, TOWN OF | 2,030 | 5 |
| MEDICINE BOW, TOWN OF | 189 | 4 |
| JEFFREY CITY WATER & SEWER DISTRICT | 40 | 4 |
| ALPINE, TOWN OF | 1,300 | 4 |
| LANDER, CITY OF | 7,615 | 4 |
| BEAR RIVER REGIONAL JOINT POWERS | 1,200 | 4 |
| KENNINGTON SPRINGS PIPELINE | 45 | 4 |
| WRANGLER ESTATES | 250 | 4 |
| VETERANS ADMINISTRATION MEDICAL CENTER | 685 | 4 |
| BEDFORD WATER & SEWER DISTRICT | 750 | 3 |
| LUSK, TOWN OF | 1,576 | 3 |
| RIVERTON, CITY OF | 10,330 | 3 |
| ROCK SPRINGS/GREEN RIVER JPB | 25 | 3 |
| WAMSUTTER, TOWN OF | 500 | 3 |
| GROVER WATER & SEWER DISTRICT | 252 | 3 |
| ALBIN, TOWN OF | 181 | 3 |
| MARBLETON, TOWN OF | 861 | 3 |
| HIDE-A-WAY MOBILE VILLAGE | 107 | 3 |
| BRIDGER VALLEY JOINT POWERS BOARD | 1,728 | 3 |
| GARDENS NORTH HOMEOWNERS ASSOCIATION | 300 | 3 |
| LINDLEY PARK, LLC | 362 | 3 |
| SOUTHFORK ESTATES | 144 | 3 |
| WARD CREEK LANDOWNERS ASSOCIATION | 77 | 3 |
| SUNRIDGE ESTATES | 220 | 3 |
| ARAPAHOE INDUSTRIAL PARK | 650 | 2 |
| ORCHARD VALLEY WATER COMPANY | 260 | 2 |
| EVERGREEN MOBILE HOME PARK | 26 | 2 |
| MOORCROFT, TOWN OF | 1,009 | 2 |
| ELK MOUNTAIN, TOWN OF | 191 | 2 |
| NATRONA COUNTY INT'L AIRPORT | 375 | 2 |
| SUPERIOR, TOWN OF | 336 | 2 |
| FAIRVIEW WATER & SEWER DISTRICT | 230 | 2 |
| MOUNTAIN VIEW ACRES | 165 | 2 |
| HUDSON, TOWN OF | 460 | 2 |
| COUNTRYSIDE WATER USERS, INC. | 360 | 2 |
| FIRST FIKE SUBDIVISION | 150 | 2 |
| GLENROCK, TOWN OF | 2,466 | 2 |
| CHUGWATER, TOWN OF | 200 | 2 |
| COWLEY, TOWN OF | 800 | 2 |
| HI-COUNTRY WATER DISTRICT | 85 | 2 |
| RED LANE DOMESTIC WATER, INC. | 110 | 2 |
| COUNTRYSIDE COURT | 125 | 2 |
| INDIAN PAINTBRUSH WATER DISTRICT | 150 | 2 |
| TURNERVILLE WATER AND SEWER DISTRICT | 90 | 2 |
| CENTENNIAL WATER AND SEWER DISTRICT | 150 | 2 |
| RESTWAY TRAVEL PARK | 62 | 2 |
| LAKEVIEW MOBILE HOME PARK | 36 | 2 |
| ARAPAHOE COMM WATER SYSTEM | 3,100 | 1 |
| BAIROIL, TOWN OF | 71 | 1 |
| BIG PINEY, TOWN OF | 445 | 1 |
| OSAGE WATER DISTRICT | 240 | 1 |
| PINEDALE MUNICIPAL WS | 1,900 | 1 |
| MILLER LOWER MOBILE HOME PARK | 30 | 1 |
| SHERIDAN, CITY OF | 22,700 | 1 |
| SUNDANCE, CITY OF | 1,279 | 1 |
| ENCAMPMENT, TOWN OF | 450 | 1 |
| POISON SPIDER I&S DISTRICT | 200 | 1 |
| POINT OF ROCKS MERCANTILE | 78 | 1 |
| FARSON EDEN SCHOOL | 530 | 1 |
| PLAY PARK LLC | 96 | 1 |
| WATER UNLIMITED, INCORPORATED | 144 | 1 |
| UPTON, TOWN OF | 1,100 | 1 |
| OSMOND PIPELINE CO | 250 | 1 |
| ETNA WATER & SEWER DISTRICT | 135 | 1 |
| YODER, TOWN OF | 131 | 1 |
| DUBOIS, TOWN OF | 1,870 | 1 |
| A & J MOBILE HOME PARK | 100 | 1 |
| B&K MOBILE HOME PARK | 200 | 1 |
Cities with Water Issues
Cheyenne
Pop: -
Laramie
Pop: -
Wheatland
Pop: -
Rawlins
Pop: -
Cody
Pop: -
Riverton
Pop: -
Casper
Pop: -
Glenrock
Pop: -
Mills
Pop: -
Newcastle
Pop: -
Gillette
Pop: -
Sheridan
Pop: -
Rock Springs
Pop: -
Evanston
Pop: -
Point Of Rocks
Pop: -
Moose
Pop: -
Kemmerer
Pop: -
Granger
Pop: -
Green River
Pop: -
Fort Washakie
Pop: -
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| Baxter/Union Pacific Tie Treating | Deleted NPL Site | 37.24 |
| F.E. Warren Air Force Base | NPL Site | 39.23 |
| Mystery Bridge Rd/U.S. Highway 20 | Deleted NPL Site | 32.10 |
Counties (23 total)
| County | Facilities |
|---|---|
| Teton | 1 |
| Natrona | 12 |
| Lincoln | 3 |
| Sweetwater | 11 |
| Fremont | 1 |
| Laramie | 9 |
| Big Horn | 3 |
| Campbell | 9 |
| Converse | 8 |
| Park | 4 |
| Carbon | 3 |
| Albany | 2 |
| Goshen | 0 |
| Weston | 1 |
| Sheridan | 1 |
| Uinta | 5 |
| Hot Springs | 0 |
| Platte | 2 |
| Washakie | 2 |
| Crook | 0 |
Showing top 20 counties by environmental activity. Wyoming has 23 counties total.
Largest Cities
Fe Warren Afb
Pop: -
1 facilities · 0 water systems
Cheyenne
Pop: -
8 facilities · 14 water systems
Laramie
Pop: -
2 facilities · 6 water systems
Wheatland
Pop: -
1 facilities · 1 water systems
Guernsey
Pop: -
1 facilities · 1 water systems
Rawlins
Pop: -
1 facilities · 2 water systems
Sinclair
Pop: -
1 facilities · 1 water systems
Worland
Pop: -
2 facilities · 4 water systems
Cody
Pop: -
2 facilities · 4 water systems
Frannie
Pop: -
1 facilities · 1 water systems
Lovell
Pop: -
3 facilities · 2 water systems
Riverton
Pop: -
1 facilities · 4 water systems
Casper
Pop: -
6 facilities · 14 water systems
Evansville
Pop: -
5 facilities · 1 water systems
Glenrock
Pop: -
2 facilities · 1 water systems
Douglas
Pop: -
6 facilities · 5 water systems
Mills
Pop: -
1 facilities · 4 water systems
Newcastle
Pop: -
1 facilities · 7 water systems
Gillette
Pop: -
9 facilities · 47 water systems
Sheridan
Pop: -
1 facilities · 4 water systems
Frequently Asked Questions
How many polluting facilities are in Wyoming? ▼
Wyoming has 78 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 93.9M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Wyoming have Superfund sites? ▼
Yes, Wyoming has 3 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in Wyoming? ▼
Wyoming has 316 EPA-regulated water systems. 123 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for Wyoming? ▼
PlainEnviro provides three categories of EPA environmental data for Wyoming: Toxic Release Inventory (TRI) data covering 78 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 316 water systems, and Superfund National Priorities List (NPL) data for 3 contaminated sites.
How does Wyoming compare to other states environmentally? ▼
Wyoming has 78 TRI facilities with 93.9M lbs in total releases, 3 Superfund sites, and 713 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for Wyoming
TRI Facilities in Wyoming →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Wyoming →
Community water systems and their violation records
Air Quality in Wyoming →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Wyoming: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Wyoming's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 78 TRI facilities reporting in Wyoming for the largest reported releases near a specific county. View facilities
- 123 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Wyoming compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.