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Violation Tracker Current Parent Company Summary

Current Parent Company Name: MPLX LP
Ownership Structure: publicly traded (ticker symbol MPLX)
Headquartered in: Ohio
Major Industry: oil and gas
Specific Industry: oil & gas
Penalty total since 2000: $25,877,900
Number of records: 60
Top 5 Offense Groups (Groups Defined)Penalty TotalNumber of Records
environment-related offenses$25,717,56839
safety-related offenses$160,33221
Top 5 Primary Offense TypesPenalty TotalNumber of Records
environmental violation$20,241,46831
air pollution violation$5,453,5006
railroad safety violation$133,77518
workplace safety or health violation$26,5573
pipeline safety violation$22,6002
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: For a summary of this company's regulatory penalties in more than 50 other countries, see its Violation Tracker Global summary page here.

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.

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CompanyPrimary Offense TypeYearAgencyPenalty Amount sort icon
MPLX LPenvironmental violation2023EPA$6,500,000
MarkWest Liberty Midstream Resources, LLC and Ohio Gathering Company, LLCenvironmental violation2018EPA$5,610,000
MPLX LPair pollution violation2018EPA$4,408,000
MPLX LPenvironmental violation2023EPA$2,000,000
MARKWEST ENERGY PARTNERS, L.P.environmental violation2018EPA$1,585,000
MARKWEST ENERGY PARTNERSenvironmental violation2018EPA$1,425,000
MarkWest Javelinaair pollution violation2013EPA$747,500
MPLX LP Et. Al. (MarkWest)-Gas Processing LDAR Consent Decree-(Non-Lead, National Case)environmental violation2019EPA$539,166
MARKWEST LIBERTY MIDSTREAM & RESOURCES, LLCenvironmental violation2019EPA$385,416
MarkWest Utica EMG, LLCenvironmental violation2014OH-ENV$320,000
MARKWEST - CADIZ PLANTenvironmental violation2019EPA$308,334
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2008PA-ENV$249,900
MarkWest Energy East Texas Gas Company, L.L.C.environmental violation2021TX-ENV$165,600
MARKWEST ENERGY PARTNERS, L.P. (MPLX LP) (NATIONAL CASE) (NLP)environmental violation2019EPA$154,167
MARKWEST LIBERTY BLUESTONE, LLCenvironmental violation2020EPA$150,025
MarkWest Liberty Bluestone, L.L.C.air pollution violation2020EPA$150,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2012PA-ENV$136,300
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2014PA-ENV$110,000
MarkWest Javelina Company, LLCenvironmental violation2013EPA(*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $97,500
MARKWEST LIBERTY MIDSTREAM & RESOURCESair pollution violation2016WV-ENV$95,000
MARKWEST LIBERTY BLUESTONE, LLCenvironmental violation2017EPA$95,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES, LLCenvironmental violation2013EPA$93,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2015PA-ENV$77,083
MARKWEST LIBERTY MIDSTREAM AND RESOURCES, LLCenvironmental violation2021EPA$75,000
MARKWEST LIBERTY BLUESTONE, LLCenvironmental violation2014EPA$74,556
MARKWEST LIBERTY MIDSTREAM & RESOURCESair pollution violation2017WV-ENV$48,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES, LLCenvironmental violation2012EPA$44,100
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2017EPA$42,893
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2014PA-ENV$20,000
MarkWest Javelina Company, L.L.C.environmental violation2015TX-ENV$18,840
MARKWEST RANGER PIPELINE COMPANY L.L.C.pipeline safety violation2012PHMSA$17,600
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2019PA-ENV$14,600
MARKWEST ENERGY EAST TEXAS GAS COMPANY, L.L.C.environmental violation2021TX-ENV$13,680
MARKWEST HYDROCARBON LLCworkplace safety or health violation2019OSHA$13,260
MarkWest Javelina Company, L.L.C.environmental violation2020TX-ENV$11,408
Markwest Energy Partners, L.P.railroad safety violation2014FRA$10,500
Markwest Energy Partners, L.P.railroad safety violation2014FRA$10,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2010PA-ENV$10,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2017FRA$8,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2018FRA$8,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2018FRA$8,000
Markwest Hydrocarbon, L.L.C.railroad safety violation2019FRA$8,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2019FRA$8,000
Markwest Hydrocarbon, L.L.C.railroad safety violation2021FRA$7,600
MarkWest Hydrocarbon, Inc.railroad safety violation2015FRA$7,500
Markwest Hydrocarbonrailroad safety violation2008FRA$7,500
MARKWEST JAVELINA COMPANY LLCworkplace safety or health violation2008OSHA$7,429
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2014PA-ENV$7,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2018FRA$7,000
MarkWest Hydrocarbon, Inc.railroad safety violation2016FRA$6,800
Markwest Energy Partners, L.P.railroad safety violation2014FRA$6,500
MarkWest Hydrocarbon, L.L.C.railroad safety violation2018FRA$6,500
MarkWest Hydrocarbon, L.L.C.railroad safety violation2017FRA$6,375
MarkWest Hydrocarbon, Inc.railroad safety violation2016FRA$6,000
MarkWest Hydrocarbon, L.L.C.railroad safety violation2016FRA$6,000
MARKWEST UTICA EMG, LLCworkplace safety or health violation2017OSHA$5,868
Markwest Energy Partners, L.P.railroad safety violation2015FRA$5,500
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCenvironmental violation2015PA-ENV$5,400
MARKWEST RANGER PIPELINE COMPANY L.L.C.pipeline safety violation2005PHMSA$5,000
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLCair pollution violation2017WV-ENV$5,000
(*): Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting.