| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-12-30 | JR SIMPLOT COMPANY | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | Pass | Local |
| 2021-12-17 | BLUE DIAMOND HILL GYPSUM — high-priority violation on file | Pass | Local |
| 2021-11-23 | HIGH DESERT STATE PRISON — high-priority violation on file | Pass | Local |
| 2021-11-08 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-11-08 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-11-01 | WELLS CARGO LONE MOUNTAIN PLANT | Pass | Local |
| 2021-11-01 | WELLS CARGO LONE MOUNTAIN PLANT | Pass | Local |
| 2021-10-28 | EMD ACQUISITION, LLC — high-priority violation on file | Pass | Local |
| 2021-10-21 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-09-28 | ROBERTSONS READY MIX | Pass | Local |
| 2021-09-24 | APEX REGIONAL LANDFILL — high-priority violation on file | Pass | Local |
| 2021-09-09 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-09-08 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-08-24 | EMD ACQUISITION, LLC — high-priority violation on file | Pass | Local |
| 2021-08-11 | MGM RESORTS INTERNATIONAL — high-priority violation on file | Pass | Local |
| 2021-08-11 | MGM RESORTS INTERNATIONAL — high-priority violation on file | Pass | Local |
| 2021-07-29 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-07-29 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-07-28 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-07-28 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-07-28 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | Pass | Local |
| 2021-07-28 | APEX REGIONAL LANDFILL — high-priority violation on file | Pass | Local |
| 2021-07-28 | APEX REGIONAL LANDFILL — high-priority violation on file | Pass | Local |
| 2021-06-15 | EMD ACQUISITION, LLC — high-priority violation on file | Fail | State |
| 2021-05-28 | EMD ACQUISITION, LLC — high-priority violation on file | Fail | State |
| 2021-05-20 | EMD ACQUISITION, LLC — high-priority violation on file | Pass | State |
| 2021-05-20 | EMD ACQUISITION, LLC — high-priority violation on file | Pass | State |
| 2021-05-20 | EMD ACQUISITION, LLC — high-priority violation on file | Pass | State |
| 2021-04-16 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-04-16 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-04-16 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | Pass | Local |
| 2021-03-31 | CHUCK LENZIE GENERATING STATION | Pass | Local |
| 2021-03-31 | CHUCK LENZIE GENERATING STATION | Pass | Local |
| 2021-03-26 | APEX REGIONAL LANDFILL — high-priority violation on file | Pass | Local |
| 2021-03-10 | PABCO GYPSUM | Pass | Local |
| 2021-02-26 | GEORGIA PACIFIC GYPSUM, LLC | Pass | Local |
| 2021-02-26 | GEORGIA PACIFIC GYPSUM, LLC | Pass | Local |
| 2021-02-24 | GEORGIA PACIFIC GYPSUM, LLC | Pass | Local |
| 2021-02-23 | GEORGIA PACIFIC GYPSUM, LLC | Pass | Local |
| 2021-02-03 | PABCO GYPSUM | Fail | Local |
| 2021-02-03 | PABCO GYPSUM | Fail | Local |