EPA-regulated facilities in Sweetwater County, WY

There are 1,082 EPA-regulated facilities inside Sweetwater County, Wyoming. The most common kinds are water discharge (405), hazardous waste (355), air emissions (289). 6 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 28 have a violation on record. Penalties over the last five years total $5.5M across 8 sites.

Open the map of Sweetwater County

1,082facilities in the county

6in significant noncompliance

28with a violation on record

$5.5Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	355
Large quantity generators	4
Small quantity generators	174
Transporters	5
Chemical (RMP/TRI)	43
Superfund	2
Air emissions	289
Major sources	20
Synthetic minor sources	3
Minor sources	81
Water discharge	405
Major permits	3
Minor permits	284
Drinking water systems	52
Greenhouse gas reporters	24
Scrap yards	1
Recycling centers	1

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) NE1/4 S15 T20N R109W, SWEETWATER COUNTY, WY, 82935 Significant noncompliance · $34k in penalties
JIM BRIDGER 35 MILES EAST OF ROCK SPRINGS, POINT OF ROCKS, WY, 82942 Significant noncompliance · $12k in penalties
SUPERIOR, TOWN OF SUPERIOR, WY Significant noncompliance
SMITHS #182 2558 FOOTHILL BOULEVARD, ROCK SPRINGS, WY, 82901 Significant noncompliance
GREEN RIVER-ROCK SPRINGS JPB WATER PLANT (UNKNOWN ADDRESS), (UNKNOWN CITY), WY, 00000 Significant noncompliance
BAIROIL FIELD UNKNOWN, UNKNOWN, WY, 00000 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UNITED PARCEL SERVICE-- ROCK SPRINGS 2200 SUNSET, ROCK SPRINGS, WY, 82901 $5.3M in penalties
GENERAL CHEMICAL 25 MILES WEST OF GREEN RIVER, GREEN RIVER, WY, 82935 $95k in penalties
GRANGER GAS PLANT NORTHWEST OF INTERSECTION OF HWY 30 AND HWY I-80, GRANGER, WY, 82934 $50k in penalties
FMC WYOMING CORPORATION - GREEN RIVER WYOMING FACILITY 580 WESTVACO RD, GREEN RIVER, WY, 82935 $15k in penalties
SOLVAY SODA ASH JOINT VENTURE 400 COUNTY ROAD 85, GREEN RIVER, WY, 82935 $12k in penalties

Superfund sites

ROCK SPRINGS OIL RETORT PROJECT 392 PURPLE SAGE ROAD, ROCK SPRINGS, WY, 82901
BLM-BAROIL LANDFILL WYOMING HIGHWAY 73, BAROIL, WY, 82322

Towns in Sweetwater County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.