| AMBIPAR RESPONSE NORTHWEST LLC | Hazardous waste | — | — | — | No Violation Identified |
| ANDEAVOR HIGH PLAINS PIPELINE COMPANY LLC - WATFORD CITY PIPE YARD SHOP | Hazardous waste | — | — | — | No Violation Identified |
| ARNETT & BURGESS PIPELINERS | Hazardous waste | 1 | — | — | No Violation Identified |
| BADLANDS AGGREGATE INC. - JACOBSON SCORIA PIT | Water | — | — | — | Significant Violation |
| BEAR DEN GAS PLANT | — | — | — | — | — |
| BELLE FOURCHE PIPELINE COMPANY-WILSON STATION | Air | — | — | — | No Violation Identified |
| BLUE BUTTE AGGREGATES LLC - SYVERTSON SCORIA PIT 2 | Water | — | — | — | No Violation Identified |
| BRIDGER PIPELINE LLC-BRENNA STATION | Air | — | — | — | No Violation Identified |
| BRIDGER PIPELINE LLC-DENALI STATION | Air | — | — | — | No Violation Identified |
| BRIDGER PIPELINE LLC-HIGHWAY 23 STATION | Air | — | — | — | No Violation Identified |
| CALIBER MIDSTREAM, LLC-HAY BUTTE PROCESSING PLANT | Air | — | — | — | No Violation Identified |
| CASH WISE FOODS - WATFORD 3042 | Hazardous waste | — | — | — | No Violation Identified |
| CENTRAL SPECIALTIES INC - WATFORD CITY, ND | Water | — | — | — | No Violation Identified |
| CHORD ENERGY-TREATMENT PLANT | Drinking water | — | — | — | Inactive |
| CONTINENTAL RESOURCES INC WATFORD CITY OFFICE AND YARD | Hazardous waste | — | — | — | No Violation Identified |
| CORNER POST LAND LLC - STORMWATER CONSTRUCTION | Water | — | — | — | No Violation Identified |
| DAKOTA ACCESS, LLC-JOHNSON'S CORNER STATION | Air | — | — | — | No Violation Identified |
| DAKOTA ACCESS, LLC-WATFORD CITY STATION | Air | — | — | — | No Violation Identified |
| DC AGGREGATE F&G PIT - DC AGGREGATE LLC | Water | — | — | — | No Violation Identified |
| DC AGGREGATE LLC - DC AGGREGATE NELSON PIT | Water | — | — | — | No Violation Identified |
| DEMICKS LAKE GAS PLANT | — | — | — | — | — |
| DEVORE TANK FARM | Water | — | — | — | No Violation Identified |
| DEVORE TANK FARM | Hazardous waste | 2 | — | — | No Violation Identified |
| EIGHTY-EIGHT OIL LLC-HIGHWAY 23 STATION | Air | — | — | — | No Violation Identified |
| EIGHTY-EIGHT TERMINALS NORTH DAKOTA LLC-JOHNSONS CORNER TERMINAL | Air | — | — | — | No Violation Identified |
| ENABLE BAKKEN CRUDE SERVICES, LLC-BEAR DEN TRANSFER FACILITY | Air | — | — | — | No Violation Identified |
| ENBRIDGE OPERATING SERVICES, L.L.C. (ENBRIDGE)-ALEXANDER STATION | Air | — | — | — | No Violation Identified |
| EQUINOR PIPELINES LLC-CENTRAL BANKS CDP COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| GARDEN CREEK GAS PLANT | Air | — | — | — | No Violation Identified |
| GENE'S TREE SERVICE | Hazardous waste | — | — | — | No Violation Identified |
| HESS NORTH DAKOTA PIPELINES LLC-CHERRY CREEK COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HIGH PLAINS TRANSPORT INC | Water | — | — | — | No Violation Identified |
| HILAND - 4 BEARS COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HILAND CRUDE, LLC-WATFORD INJECTION STATION | Air | — | — | — | No Violation Identified |
| HILAND PARTNERS HOLDINGS LLC-CHERRY CREEK COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HILAND PARTNERS HOLDINGS LLC-GRIZZLY BEAR COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HILAND PARTNERS HOLDINGS LLC-JAMESTOWN COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HILAND PARTNERS HOLDINGS LLC-PASADENA COMPRESSOR STATION | Air | — | — | — | No Violation Identified |
| HILAND PARTNERS HOLDINGS LLC-ROOSEVELT GAS PLANT | Air | — | — | — | No Violation Identified |
| KINDER MORGAN WATFORD INJECTION STATION | Hazardous waste | — | — | — | No Violation Identified |
| KNIFE RIVER - WATFORD CITY RMX | Water | — | — | — | No Violation Identified |
| KT ENTERPRISES, LLC | Water | — | — | — | No Violation Identified |
| LES SCHWAB TIRE CENTER - WATFORD CITY | Water | — | — | — | No Violation Identified |
| LILLIBRIDGE TEMPORARY PLANT SITE | Water | — | — | — | — |
| LITTLE MISSOURI GAS PLANT | Air | 3 | — | — | No Violation Identified |
| LYNX SAND AND GRAVEL LLC | Water | — | — | — | No Violation Identified |
| MARTIN CONSTRUCTION INC - SORENSON SCORIA PIT | Water | — | — | — | Significant Violation |
| MCKENZIE COUNTY AG EXPO PHASE 2 | Water, Hazardous waste | — | — | — | No Violation Identified |
| MCKENZIE COUNTY LANDFILL | Water | — | — | — | No Violation Identified |
| MCKENZIE COUNTY – 25098 – MCK-2724(001) | Water | — | — | — | No Violation Identified |
| MCKENZIE COUNTY – MAIN STREET SOUTH MULTI-USE PATH | Water | — | — | — | No Violation Identified |
| MCKENZIE COUNTY – WATFORD CITY WRRF 2025 IMPROVEMENTS | Water | — | — | — | No Violation Identified |
| MITCHELL'S OIL FIELD SERVICES - WATFORD CITY | Water, Hazardous waste | — | — | — | No Violation Identified |
| NATIONAL PARK SERVICE - STORMWATER CONSTRUCTION | Water | — | — | — | No Violation Identified |
| NORTH STAR LOGISTICS LLC DBA SENTRY CRANE AND SERVICES | Hazardous waste | — | — | — | No Violation Identified |
| NORTHERN PUMP & COMPRESSION, INC. | Hazardous waste | — | — | — | No Violation Identified |
| ONEOK ROCKIES MIDSTREAM, L.L.C. - BEAVERTAIL COMPRESSOR STATION - AQ | Air | 1 | — | — | No Violation Identified |
| ONEOK ROCKIES MIDSTREAM, L.L.C. - DEMICKS LAKE GAS PLANT - AQ | Air | 2 | — | — | No Violation Identified |
| ONEOK ROCKIES MIDSTREAM, L.L.C. - GARDEN CREEK GAS PLANT - AQ | Air | 2 | — | — | No Violation Identified |
| PLAINS MARKETING, L.P.-ALEXANDER STATION | Air | — | — | — | No Violation Identified |
| PLAINS PIPELINE - JOHNSON CORNER STATION | Hazardous waste | — | — | — | No Violation Identified |
| ROLFSRUD COUNTY ROAD 10 SCORIA PIT | Water | — | — | — | Significant Violation |
| ROOSEVELT GAS PLANT | — | — | — | — | — |
| ROOSEVELT PLANT | Hazardous waste | — | — | — | No Violation Identified |
| ROUGH RIDER BAKKEN CRUDE LLC - CENTRAL DELIVERY POINT FACILITY | Air | 2 | — | — | No Violation Identified |
| ROUGH RIDER BAKKEN G&P LLC - BEAR DEN GAS PLANT | Air | 2 | — | — | No Violation Identified |
| ROUGH RIDER BAKKEN G&P LLC, A SUBSIDIARY OF ENERGY TRANSFER, LP - WILD BASIN GAS | Air | 2 | — | — | No Violation Identified |
| SECURE WASTE INFRASTRUCTURE USA LLC - SECURE ENERGY SWD | Water | — | — | — | No Violation Identified |
| STEVEN SHARP CRANE AND RIGGING LLC | Water | — | — | — | No Violation Identified |
| STRATA CORPORATION-WATFORD CITY PLANT | Water | — | — | — | No Violation Identified |
| TARGA JOHNSONS CORNER CRUDE TERMINAL | Hazardous waste | 2 | — | — | No Violation Identified |
| TELLURIDE LODGE-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| TESORO GREAT PLAINS GATHERING & MARKETING LLC-WATFORD CITY RECEIPT POINT | Air | — | — | — | No Violation Identified |
| TESORO PIPELINE - POKER JIM STATION | Hazardous waste | — | — | — | No Violation Identified |
| TRACTOR SUPPLY #1812 | Hazardous waste | — | — | — | No Violation Identified |
| USG WHEATLAND PIPELINE LLC.-POINT OF ENDING- ENBRIDGE FACILITY | Air | — | — | — | No Violation Identified |
| VAC U JET SOUTH WWTP | Water | 1 | — | — | No Violation Identified |
| WATFORD CITY - ND RUNNINGS | Water | — | — | — | No Violation Identified |
| WATFORD CITY CITY OF | Water | 3 | — | — | No Violation Identified |
| WATFORD CITY CITY OF | Drinking water | — | — | — | No Violation Identified |
| WATFORD CITY CITY OF | Water | — | — | — | No Violation Identified |
| WATFORD CITY CITY OF | Water | — | — | — | No Violation Identified |
| WATFORD CITY FACILITY BAKER PETROLITE | Water | — | — | — | No Violation Identified |
| WATFORD CITY MUNICIPAL AIRPORT | Water | — | — | — | No Violation Identified |
| WBI ENERGY SPRING CREEK METER STATION | Hazardous waste | — | — | — | No Violation Identified |
| WESTERN AREA WATER SUPPLY AUTHORITY - WAWSA - MCRWD SYSTEM II EXPANSION | Water | — | — | — | No Violation Identified |
| WILD BASIN GAS PROCESSING AND CRUDE HANDLING FACILITY | — | — | — | — | — |
| WOLLA OILFIELD SERVICES - WATFORD CITY | Water | 1 | — | — | No Violation Identified |