Petrora

WATER · SAN PATRICIO COUNTY

Produced water and disposal in San Patricio County

Every injection and disposal permit in the county, what each well is permitted to take, what its operator reported, and who is reporting daily. Earthquakes in the area →

San Patricio County has 54 active injection and disposal wells, 26 of them permitted for disposal, with 439,400 barrels a day of permitted capacity.

Operators reported 12 million barrels injected on H-10 filings in the twelve months to June 2025, down 14% on the year before, about 8% of what the permits allow.

McGowan Working Ptrs, Inc is the largest injector in the county, with 6.4 million barrels reported across 5 active wells.

54
active injection wells, 26 for disposal
439K
bbl/d permitted capacity
12.1M
bbl reported, H-10 year to Jun 2025 -14%
8%
of permitted capacity used
372
UIC permits on file, all time

Reported injection, by month

H-10 FILINGS · TEN YEARS TO JUN 2025

Last 12 months 12,148,610 · prior 12 14,074,618(-14%)

01M2M3M2016201720182019202020212022202320242025

Who injects here

Operators with active permits in the county, by reported H-10 volume over the settled year.

OperatorReported, bblActive wellsCapacity bbl/d
McGowan Working Ptrs, Inc6.41M530K
Allegiant Res, LLC2.41M15225K
Mayfield Energy, LLC957K13.5K
Sandalwood Expl, L.P510K210K
Orx Res, L.L.C316K212K
Wallis Engy, Inc287K431K
Poco LLC259K15K
Anderson Oil Ltd254K12K
B&D Disposal Ltd231K15K
Sun Expl, Inc222K36.8K
84 Engy LLC138K313K
Tare Resources, LLC58.4K115K
Mego Res, LLC41.8K16K
Dallas Petro Group, LLC31.6K313K
Pullin Lease Service, Inc14.4K15K
New Horizon Investments Ltd2512.8K
Angel Operating LLC—120K
Welderxp Ltd—216K
Cerberus Engineering, LLC—17.5K
Durango Res Corp—15K

Injection permits

372 UIC PERMITS · 54 ACTIVE · PAGE 1 OF 4

Active permits first, by reported volume, then cancelled, plugged, and never-activated permits.

WellOperatorStatusPurposeReported, bblbbl/d permittedZone, ftPermitted
E. H. Welder 'C' #97WMcGowan Working Ptrs, IncActiveEnhanced recovery1.77M5,0005,635–5,700May 11, 2012
Welder, E. H., -C- #80McGowan Working Ptrs, IncActiveEnhanced recovery1.68M5,0005,620–5,740Nov 21, 2012
Welder, E. H., -C- #94McGowan Working Ptrs, IncActiveEnhanced recovery1.49M5,0005,615–5,735May 16, 2012
Welder, E. H., -C- #89McGowan Working Ptrs, IncActiveEnhanced recovery1.47M5,0005,650–5,750Aug 24, 2012
Usher #1Mayfield Energy, LLCActiveDisposal957K3,5005,140–5,525Jun 16, 2016
Pappy Unit No. 1 #2Sandalwood Expl, L.PActiveDisposal510K5,0002,320–3,200Jul 19, 2019
Kellogg Gas Unit #4Orx Res, L.L.CActiveEnhanced recovery307K8,0007,100–8,650Jan 19, 2016
Baylor Whatley Unit #2Poco LLCActiveEnhanced recovery259K5,0003,616–4,678Dec 8, 2020
Dimmick #1DAnderson Oil LtdActiveDisposal254K2,0004,015–4,130May 11, 1983
Cantu, Narcisco #2RB&D Disposal LtdActiveEnhanced recovery231K5,0002,200–3,961Jan 11, 2016
Welder, Minnie S. #73Allegiant Res, LLCActiveEnhanced recovery206K10,0003,950–4,976Feb 27, 2018
Welder, Minnie S. #103DAllegiant Res, LLCActiveEnhanced recovery206K30,0004,141–5,000Oct 12, 2017
Welder, Minnie S. #104DAllegiant Res, LLCActiveEnhanced recovery205K30,0004,150–5,000Oct 12, 2017
Welder, Minnie S. #69DAllegiant Res, LLCActiveEnhanced recovery204K10,0003,954–4,982Feb 26, 2018
Welder, Minnie S. #68Allegiant Res, LLCActiveEnhanced recovery196K10,0004,140–4,966May 2, 2018
Welder, Minnie S. #46Allegiant Res, LLCActiveDisposal193K—4,746–4,960Jun 5, 1985
Welder, Minnie S. #23Allegiant Res, LLCActiveDisposal190K20,0004,717–4,920Mar 13, 2001
Welder, Minnie S. #82Allegiant Res, LLCActiveDisposal187K20,0004,732–4,966Apr 5, 2011
Hunt, J. M. #9Wallis Engy, IncActiveDisposal180K5,0005,000–5,250Apr 3, 2012
Welder, Minnie S. #56DAllegiant Res, LLCActiveEnhanced recovery161K15,0004,800–7,200Jun 16, 2021
Welder Ranch #14WSun Expl, IncActiveEnhanced recovery146K5,0003,670–4,650Jun 26, 2017
Welder, J. F. Unit #C 484 Engy LLCActiveDisposal138K5,0002,702–2,920Apr 15, 1982
Hunt, J. M. #6Wallis Engy, IncActiveDisposal105K8,0004,800–5,300Jan 19, 2012
Welder, Minnie S. #76Allegiant Res, LLCActiveEnhanced recovery104K10,0003,960–4,910Feb 22, 2019
Welder, Minnie S. #74Allegiant Res, LLCActiveEnhanced recovery98.7K10,0004,814–5,040Oct 18, 2017
Welder, Minnie S. #50Allegiant Res, LLCActiveDisposal93.5K20,0004,800–4,985Jun 27, 2012
Fowler (McDonnold) #1Sun Expl, IncActiveEnhanced recovery76.2K1,0001,630–2,950May 7, 2015
Schmidt, Henry W. #2Tare Resources, LLCActiveDisposal58.4K15,0006,750–8,650Apr 1, 2013
State Tract 975 #4Mego Res, LLCActiveEnhanced recovery41.8K6,0007,503–8,149Aug 5, 2019
Welder #A 38Dallas Petro Group, LLCActiveDisposal31.6K5,0003,310–3,340May 18, 2015
Brittain, J.L. #4Pullin Lease Service, IncActiveEnhanced recovery14.4K5,0003,800–4,100Feb 23, 1989
State Tract 686 #2Orx Res, L.L.CActiveDisposal9.02K4,0005,250–5,300Jun 14, 1996
Welder, Minnie S. #20Allegiant Res, LLCActiveEnhanced recovery10010,0004,111–4,974Jan 31, 2018
Welder, Minnie S. #95Allegiant Res, LLCActiveEnhanced recovery10010,0004,114–4,959Jan 31, 2018
Wright #1New Horizon Investments LtdActiveDisposal252,8002,730–2,780Apr 30, 1990
Welder, Minnie S. #105DAllegiant Res, LLCActiveEnhanced recovery—20,0004,133–4,976Jun 25, 2018
Hunt, J. M. #8Wallis Engy, IncActiveDisposal—14,0004,080–4,195Dec 17, 1971
Welder, E. H., -C- #73McGowan Working Ptrs, IncActiveEnhanced recovery—10,0003,000–5,000Nov 5, 1998
Brown-Mauch Unit #1Welderxp LtdActiveEnhanced recovery—10,0005,340–5,800Aug 19, 2018
Rosson, J. R. #5Cerberus Engineering, LLCActiveDisposal—7,5004,140–4,180Jan 28, 2025
Welder, J. F., Unit #B 1684 Engy LLCActiveDisposal—6,0002,230–4,520Nov 29, 1984
Welder Efh #2Welderxp LtdActiveEnhanced recovery—6,0005,650–5,700Jun 8, 2018
Hutto #3Durango Res CorpActiveEnhanced recovery—5,0003,490–4,650Dec 5, 2011
Pappy Unit No. 1 #1Sandalwood Expl, L.PActiveDisposal—5,0002,770–3,100Jul 3, 2019
Welder, R. H., -B- #18Dallas Petro Group, LLCActiveDisposal—4,0002,500–3,050Feb 14, 1989
Hunt, J. M. #10Wallis Engy, IncActiveDisposal—4,0002,068–2,130Jan 5, 1988
Welder "C" #4Dallas Petro Group, LLCActiveDisposal—4,0002,700–2,890Sep 29, 2011
Welder, J. F., Unit #C 684 Engy LLCActiveDisposal—2,0001,300–4,300Feb 24, 2000
Williams, James P. #4Texas, Les & CoActiveDisposal—2,0004,000–4,370Jul 31, 1995
Sabco Gregory SWD #1White Marlin Oper Co, LLCActiveDisposal—2,0002,500–5,100Nov 19, 1998
Hoskinson A #3 DProline Energy Resources IncActiveDisposal—1,0001,180–1,600Jun 26, 1986
Brown, C. S. #1Sun Expl, IncActiveDisposal—8001,575–2,500Jan 31, 1997
Flinn #13DAngel Operating LLCActiveEnhanced recovery—20,0004,000–5,450Mar 12, 2018
FPC Flinn #2Inland Ocean, IncActiveEnhanced recovery—8005,650–6,860Sep 7, 2012
Welder, Minnie S. #30DAllegiant Res, LLCCancelledDisposal187K—4,700–5,000Sep 27, 1985
Welder, Minnie S. #55Allegiant Res, LLCCancelledEnhanced recovery184K10,0007,305–7,490Feb 14, 2002
Sims #7Wallis Engy, IncCancelledDisposal2.31K1,5003,085–3,185Dec 9, 1992
Welder, Minnie S. #48DAllegiant Res, LLCCancelledEnhanced recovery—15,0003,954–5,000Mar 5, 2019
Welder, E. H., -C- #17McGowan Working Ptrs, IncInactiveEnhanced recovery—6,0005,640–5,760Nov 22, 2013
Beyer #1Zone Ridge Operating, LLCInactiveEnhanced recovery—5,0002,980–5,820Oct 17, 2011
Ewing -C- #1Texas, Les & CoInactiveEnhanced recovery——6,930Jun 14, 1985
Rob Welder #1Sandalwood Expl, L.PCancelledEnhanced recovery—40,0003,950–5,100Nov 21, 2019
Speer Fee #3BNye Expl & Prod, L.L.CPluggedDisposal—25,0004,100–4,500Jan 28, 2013
Welder, Minnie S. #24Allegiant Res, LLCPluggedDisposal—20,0004,820–4,980Jan 3, 2012
Flinn #18DAllegiant Res, LLCCancelledEnhanced recovery—20,0004,000–5,483Feb 2, 2019
SMH #1DHughes Legacy LLCCancelledEnhanced recovery—20,0004,095–5,205Nov 4, 2021
Havelka #1DJura Engy Oper LLCCancelledDisposal—20,0004,000–4,330Dec 21, 2022
Mayo, J. W., a/C 1 #4Hec Petroleum, Inc.CancelledDisposal—15,0003,507–3,670Nov 12, 1973
Mayo, J. W., a/C 1 #5Hec Petroleum, Inc.CancelledDisposal—15,0003,495–3,600Jan 18, 1971
Mayo, J. W., a/C 1 #6Hec Petroleum, Inc.CancelledDisposal—15,0003,490–3,670Jan 18, 1971
Mayo, J. W. #35Hec Petroleum, Inc.CancelledDisposal—15,0003,475–3,670Oct 26, 1993
Mayo, J. W., a/C 1 #3Youngblood, C. S. IIICancelledDisposal—15,0003,500–3,640Jan 18, 1971
Welder, Minnie S. #36DAbraxas Petro CorpCancelledDisposal—15,0003,300–5,000Jun 5, 1985
Welder, Minnie S. #60DSuperior Oil Co, TheCancelledDisposal—15,0004,700–5,000Feb 11, 1983
Welder, Minnie S. #17WDAbraxas Petro CorpCancelledDisposal—15,0004,700–5,000Aug 9, 1983
Schmidt, David Allen et UX #2Petro Corp of TexasPluggedOther—15,0004,075–4,325Jan 23, 1973
Schmidt, David Allen et UX #7Petro Corp of TexasCancelledOther—15,0004,050–4,250Jan 23, 1973
Mayo, J. W., a/C 2 #36Hec Petroleum, Inc.CancelledEnhanced recovery—12,0004,200–4,300Feb 28, 1994
Mayo, J. W., a/C 2 #37Hec Petroleum, Inc.CancelledEnhanced recovery—12,0004,200–4,300Feb 28, 1994
Mayo, J. W., a/C 1 #44Youngblood, C. S. IIICancelledOther—12,0004,200–4,300Feb 15, 1972
Mayo, J. W., a/C 1 #84Hec Petroleum, Inc.CancelledEnhanced recovery—12,0003,940–4,000Jun 16, 1989
Taft Gin and Seed Co., Inc. #2Heep, Minnie BellePluggedOther—12,0004,050–4,200Aug 3, 1973
Mayo, J. W., a/C 1 #38Hec Petroleum, Inc.CancelledEnhanced recovery—10,0004,200–4,300Feb 28, 1994
Mayo, J. W., a/C 1 #2Hec Petroleum, Inc.CancelledDisposal—10,0003,470–3,670Jan 10, 1983
Mayo, J. W., a/C 1 #8Youngblood, C. S. IIICancelledDisposal—10,0003,540–3,700Mar 21, 1986
Ives, Ben E. #4Navajo Expl, IncCancelledOther—10,0005,289–5,315—
Welder, E. H. -C- #164McGowan Working Ptrs, IncCancelledDisposal—10,0003,950–4,850Aug 27, 1997
Roots, Mayo #1Bellows Oper Co., L. CCancelledDisposal—10,0003,300–8,800Oct 22, 1997
Welder, C. #167Marathon Oil CoPluggedEnhanced recovery—10,0002,930–5,010Nov 24, 1997
Blaschke - Mayo #19Hec Petroleum, Inc.CancelledEnhanced recovery—10,0006,300–8,266Apr 30, 2001
Welder, E.H. "E" #32McGowan Working Ptrs, IncInactiveEnhanced recovery—10,0004,000–6,470Jul 7, 2000
Ford, Marie Welder #5Gulfmax Environmental, LLCPluggedEnhanced recovery—10,0003,100–6,712Jun 25, 2014
Welder, Minnie S. #71Allegiant Res, LLCInactiveEnhanced recovery—10,0003,938–4,966Feb 27, 2018
Welder, Minnie S. #4Allegiant Res, LLCInactiveEnhanced recovery—10,0003,965–4,963Mar 15, 2018
Welder, Minnie S. #66HAllegiant Res, LLCInactiveEnhanced recovery—10,0003,955–4,968Mar 15, 2018
Welder, Minnie S. #80Allegiant Res, LLCInactiveEnhanced recovery—10,0004,158–4,972Apr 17, 2018
Welder, Minnie S. #47Allegiant Res, LLCInactiveEnhanced recovery—10,0003,946–4,972May 2, 2018
Flinn, J. W., Estate #1Oxoco Expl&prod,incCancelledOther—9,0004,041–4,064—
Flinn, J. W., Estate #5Sue-Ann Oil & Gas CoCancelledEnhanced recovery—9,0004,045–4,070Feb 21, 1973
Nueces Bay St 688 #3Energy Twenty Operating LLCCancelledDisposal—9,0004,000–6,000Mar 15, 2013

Latest disposal drilling permits

W-1 drilling permits in the county tagged as produced-water disposal.

IssuedPermitOperatorLease / well
Sep 11, 2013769534Alta Mesa Services, LPIndian Point SWD #1 40933012
Oct 6, 1998479810Sabco Operating CompanySabco Gregory SWD #1 40932575
Jul 25, 198087841Superior Oil Company, TheWelder, Minnie S. #48 D 40901682
Jul 14, 198086583Superior Oil Company, TheWelder, Minnie S. #56 D 40901688
Jun 2, 198082675Cities Service CompanyMcKamey -B- #8D 40902661
Jun 2, 198082599Cities Service CompanyHoskinson -A- #3D 40902768
Jan 28, 198070981Sun Exploration & Production Co.Hunt, J. M. #5D 40901449
Sep 6, 197957254Varn Petroleum Co.Hill, Ben #2D 40981278

About this data

RRC UIC well master and H-10 injection reports, settled through Jun 2025; TexNet daily injection for the last settled month; disposal permit tags from Petrora's sector classifier.

Developers: this page as JSON is GET /v1/data/water/tx/san-patricio, documented in the API reference.