EPA · discharge permits by pollutant and parameter

Drilling fluid, end of well, 96-hr LC50

269Permits carrying a limit
4With a recorded exceedance
4States

EPA identifies this parameter by code 04311. A permit listed here carries a numeric limit on drilling fluid, end of well, 96-hr lc50 in its discharge; an exceedance is a monitoring result above that limit, as reported to EPA.

By state

By watershed

The subbasins of the national Watershed Boundary Dataset carrying the most permits with a limit on drilling fluid, end of well, 96-hr lc50.

Permits

Permit holder	NPDES ID	City	State	Discharger	Receiving water
PETROQUEST ENERGY, LLC	GMG290174	LAFAYETTE	LA	Minor
ROOSTER PETROLEUM, LLC	GMG290331	HOUSTON	TX	Minor	Spring Branch-Buffalo Bayou
HOACTZIN PARTNERS, L.P.	GMG290540	FERNANDINA BEACH	FL	Minor
EL PASO PRODUCTION OIL&GAS CO.	GMG290015	HOUSTON	TX	Minor	GULF OF MEXICO
BENNU OIL & GAS, LLC	GMG290546	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
TEXACO EXPLORATION AND PROD.	GMG290133	NEW ORLEANS	LA	Minor	GULF OF MEXICO
WEATHERFORD PIPE. & SPEC SERV	GMG290367	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
HALL-HOUSTON EXPLORATION IV, LP	GMG290399	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
PETRO VENTURES, INC.	GMG290215	LAFAYETTE	LA	Minor	Anselm Coulee-Vermilion River
ANATEXAS OFFSHORE, INC.	GMG290284	SPRING	TX	Minor	Spring Branch-Buffalo Bayou
CASTEX OFFSHORE, INC	GMG290354	HOUSTON	TX	Minor	Vince Bayou-Buffalo Bayou
ENERGY XXI GOM, L.L.C.	GMG290329	HOUSTON	TX	Minor
HALL-HOUSTON EXPLORATION II, LP	GMG290335	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
NOBLE ENERGY, INC.	GMG290096	HOUSTON	TX	Minor	GULF OF MEXICO
PROBE RESOURCES US LTD	GMG290362	METAIRIE	LA	Minor	Metairie Canal-Canal No 2
FIELDWOOD ENERGY, LLC VK 340 A	GEG460578	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
JEFFERSON BLOCK 24 OIL&GAS LLC	GMG290336	HOUSTON	TX	Minor
ANKOR MO 870 PLT A	GEG460457	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
MARATHON OIL COMPANY	GMG290061	HOUSTON	TX	Minor	GULF OF MEXICO
FAIRWAYS OFFSHORE EXPLORATION, INC.	GMG290166	HOUSTON	TX	Minor	Cole Creek-Whiteoak Bayou
DOMINION PRODUCTION COMPANY, LLC	GMG290389	LAFAYETTE	LA	Minor	Anselm Coulee-Vermilion River
STERLING ENERGY, INC.	GMG290291	HOUSTON	TX	Minor	Vince Bayou-Buffalo Bayou
FIELDWOOD ENERGY, LLC VK 251 4	GEG460724	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
FIELDWOOD ENERGY, LLC VK 251 3	GEG460723	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
NORTHSTAR OFFSHORE ENERGY PARTNERS, LLC	GMG290377	HOUSTON	TX	Minor	Country Club Bayou-Brays Bayou
FIELDWOOD ENERGY, LLC VK251 A	GEG460479	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
HALL-HOUSTON EXPLORATION III, LP	GMG290358	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
TRI-UNION DEVELOPMENT CORP.	GMG290039	HOUSTON	TX	Minor	GULF OF MEXICO
TARPON OPER. & DEVELOP. LLC	GMG290243	HOUSTON	TX	Minor	Vince Bayou-Buffalo Bayou
MURPHY EXPLORATION & PRODUCTION - DESOTO CANYON 90 001	GEG462026	GULF OF MEXICO	GE	Minor
FIELDWOOD ENERGY VK 69 FACILITY A	GEG460925	GULF OF MEXICO	GE	Minor	GULF OF MEXICO
SABRE OIL AND GAS EXPLORATION PROJECT	AK0053690	ANCHORAGE	AK	Minor	COOK INLET, TRADING BAY
GULF ENERGY EXPLORATION CORPORATION	GMG290374	AUSTIN	TX	Minor	Lake Austin-Town Lake
DISCOVERY PRODUCER SERVICES, LLC	GMG290384	HOUSTON	TX	Minor
LINDER OIL COMPANY	GMG290059	COVINGTON	LA	Minor	GULF OF MEXICO
EPL OIL & GAS, INC.	GMG290208	NEW ORLEANS	LA	Minor	Metairie Canal-Canal No 2
COASTLAND OPERATIONS, LLC	GMG290386	DALLAS	TX	Minor	Farmers Branch-Elm Fork Trinity River
NAVITAS PETROLEUM US, LLC	GMG290606	HOUSTON	TX	Minor	City of Houston-Buffalo Bayou
TEXAS STANDARD OIL OPERATING COMPANY	GMG290379	BELLAIRE	TX	Minor	Country Club Bayou-Brays Bayou
GREAT BAY OPERATIONS, LLC	GMG290385	PORTSMOUTH	NH	Minor	Portsmouth Harbor