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Violation Tracker Current Parent Company Summary
Current Parent Company Name: Southwest Gas
Ownership Structure: publicly traded (ticker symbol SWX)
Headquartered in: Nevada
Major Industry: miscellaneous energy products and systems
Specific Industry: energy distribution
Penalty total since 2000: $6,964,506
Number of records: 52
| Top 5 Offense Groups (Groups Defined) | Penalty Total | Number of Records |
| environment-related offenses | $4,704,653 | 14 |
| safety-related offenses | $1,301,803 | 30 |
| employment-related offenses | $958,050 | 8 |
| Top 5 Primary Offense Types | Penalty Total | Number of Records |
| environmental violation | $4,704,653 | 14 |
| utility safety violation | $1,147,500 | 17 |
| labor relations violation | $933,712 | 6 |
| workplace safety or health violation | $154,303 | 13 |
| wage and hour violation | $24,338 | 2 |
Notes: Parent-subsidiary linkages are based on relationships current as of the latest revision listed in the
Update Log, which may vary from what was the case when a violation occurred. The penalty totals are adjusted to account for the fact that the individual entries below may include both agency records and settlement announcements for the same case; or else a penalty covering multiple locations may be listed in the individual records for each of the facilities. The totals are also adjusted to reflect cases in which federal and state or local agencies cooperated and issued separate announcements of the outcome. Duplicate or overlapping penalty amounts are marked with an asterisk in the list below.
Links: Subsidy Tracker data on financial assistance to this company by federal, state and local government agencies can be found
here.
Individual Penalty Records:
Click on the company or penalty amount for more information on each case.
| Company | Primary Offense Type | Year | Agency | Penalty Amount  |
| Questar Gas Management Company | environmental violation | 2012 | EPA | $3,650,000 |
| Southwest Gas Corporation | labor relations violation | 2002 | NLRB | $426,625 |
| Southwest Gas Corporation | labor relations violation | 2000 | NLRB | $321,938 |
| Dominion Energy Questar Pipeline | environmental violation | 2006 | CO-DPHE | $319,307 |
| Southwest Gas Corporation | environmental violation | 2013 | CA-ARB | $300,000 |
| Southwest Gas Corporation | utility safety violation | 2017 | NV-PUC | $300,000 |
| Southwest Gas Corporation | utility safety violation | 2015 | NV-PUC | $215,000 |
| Southwest Gas | utility safety violation | 2017 | CA-PUC | $200,000 |
| Southwest Gas Corporation | utility safety violation | 2015 | NV-PUC | $195,000 |
| Questar Gas Management | environmental violation | 2007 | CO-DPHE | $100,000 |
| Southwest Gas | labor relations violation | 2009 | NLRB | $95,000 |
| Southwest Gas Corporation | utility safety violation | 2018 | NV-PUC | $94,000 |
| Wexpro Co. | environmental violation | 2019 | WY-ENV | $87,886 |
| Questar Gas Management | environmental violation | 2011 | CO-DPHE | $84,700 |
| Southwest Gas Corporation, a California Corporation | labor relations violation | 2003 | NLRB | $50,829 |
| NORTHERN PIPELINE CONSTRUCTION CO. | workplace safety or health violation | 2007 | OSHA | $37,500 |
| Northern Pipeline Construction Company | labor relations violation | 2001 | NLRB | $31,320 |
| Southwest Gas Corporation | utility safety violation | 2011 | NV-PUC | $30,000 |
| NPL CONSTRUCTION COMPANY, MID-AMERICA OFFICE | workplace safety or health violation | 2022 | OSHA | $29,004 |
| Wexpro Co. | environmental violation | 2012 | CO-DPHE | $27,825 |
| Wexpro Co. | environmental violation | 2012 | CO-DPHE | $25,200 |
| Questar Gas Management | environmental violation | 2013 | CO-DPHE | $23,800 |
| Questar Gas Management | environmental violation | 2009 | CO-DPHE | $23,335 |
| Wexpro Co. | environmental violation | 2013 | WY-ENV | $21,000 |
| Southwest Gas Corporation | utility safety violation | 2020 | NV-PUC | $20,000 |
| Wexpro Co. | environmental violation | 2014 | CO-DPHE | $17,850 |
| Southwest Gas Corporation | utility safety violation | 2019 | NV-PUC | $15,000 |
| Questar Gas Management | environmental violation | 2005 | CO-DPHE | $14,000 |
| NPL CONSTRUCTION CO. | workplace safety or health violation | 2011 | OSHA | $14,000 |
| NPL Construction, Inc. | wage and hour violation | 2012 | WHD | $13,505 |
| NATIONAL BARRICADE LLC | workplace safety or health violation | 2016 | OSHA | $12,675 |
| Southwest Gas Corporation | utility safety violation | 2012 | NV-PUC | $12,500 |
| Southwest Gas Corporation | utility safety violation | 2015 | NV-PUC | $11,000 |
| Questar Energy Services, Inc | wage and hour violation | 2013 | WHD | $10,833 |
| Southwest Gas Corporation | utility safety violation | 2021 | NV-PUC | $10,000 |
| Southwest Gas Corporation | utility safety violation | 2020 | NV-PUC | $10,000 |
| Southwest Gas Corporation | utility safety violation | 2019 | NV-PUC | $10,000 |
| Questar Gas Management | environmental violation | 2008 | CO-DPHE | $9,750 |
| NPL CONSTRUCTION COMPANY | workplace safety or health violation | 2013 | OSHA | $9,100 |
| NPL CONSTRUCTION COMPANY, MID-AMERICA OFFICE | workplace safety or health violation | 2016 | OSHA | $8,908 |
| Southwest Gas | labor relations violation | 2008 | NLRB | $8,000 |
| Southwest Gas Corporation | utility safety violation | 2018 | NV-PUC | $7,500 |
| NPL Construction Company | utility safety violation | 2022 | MA-DPU | $7,500 |
| NPL CONSTRUCTION COMPANY | workplace safety or health violation | 2010 | OSHA | $7,000 |
| QUESTAR GAS COMPANY | workplace safety or health violation | 2016 | OSHA | $7,000 |
| NORTHERN PIPELINE CONSTRUCTION | workplace safety or health violation | 2006 | OSHA | $6,400 |
| DOMINION ENERGY QUESTAR CORP | workplace safety or health violation | 2017 | OSHA | $6,375 |
| NPL CONSTRUCTION COMPANY, MID-AMERICA OFFICE | workplace safety or health violation | 2022 | OSHA | $6,091 |
| QUESTAR GAS CO | workplace safety or health violation | 2009 | OSHA | $5,250 |
| NPL Construction Company | utility safety violation | 2019 | MA-DPU | $5,000 |
| NPL Construction Company | utility safety violation | 2018 | MA-DPU | $5,000 |
| QUESTAR GAS CO | workplace safety or health violation | 2009 | OSHA | $5,000 |
