Petrora

WATER · STARR COUNTY

Produced water and disposal in Starr 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 →

Starr County has 49 active injection and disposal wells, 19 of them permitted for disposal, with 193,150 barrels a day of permitted capacity.

Operators reported 4.2 million barrels injected on H-10 filings in the twelve months to June 2025, up 4% on the year before, about 6% of what the permits allow.

Merit Engy Co is the largest injector in the county, with 2.9 million barrels reported across 10 active wells.

49
active injection wells, 19 for disposal
193K
bbl/d permitted capacity
4.16M
bbl reported, H-10 year to Jun 2025 +4%
6%
of permitted capacity used
424
UIC permits on file, all time

Reported injection, by month

H-10 FILINGS · TEN YEARS TO JUN 2025

Last 12 months 4,158,379 · prior 12 3,984,548(+4%)

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
Merit Engy Co2.85M1048K
Southern Tejas Asset Group LLC486K417.8K
Killam Oil Co., Ltd226K38.5K
R360 Env Solutions of TX, LLC148K110K
Petrovybe Opco LLC146K16K
Hilcorp Engy Co75.3K721.2K
Dewbre Petro Corp40.6K15K
Trap Rock Oil, Ltd40.5K312K
Mountain V Texas, LLC32.4K724.6K
Mortimer Prod Co31.9K15K
Starr Oper, LLC25.8K1500
Faulconer Engy, LLC25.1K1750
Escudo Oil & Gas, LLC24.1K12K
L & B Oil and Gas Equipment, LLC3.34K1300
Orx Res, L.L.C1.89K23.5K
Vac Stop SWD, LLC—317K
Alpha Oil & Gas LLC—110K
Wagner Oil Co—11K

Injection permits

424 UIC PERMITS · 49 ACTIVE · PAGE 1 OF 5

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

WellOperatorStatusPurposeReported, bblbbl/d permittedZone, ftPermitted
Bentsen Tract I #1Merit Engy CoActiveDisposal734K5,0003,810–3,975Jun 2, 2005
Slick, T. B. Estate #89Merit Engy CoActiveDisposal654K5,0004,950–5,330Mar 25, 2009
Slick, T. B. Estate #68Merit Engy CoActiveEnhanced recovery579K5,0004,249–5,200Dec 20, 2006
Miguel #1ASouthern Tejas Asset Group LLCActiveEnhanced recovery485K15,0003,940–6,000Feb 28, 2014
Slick T.B. Estate #2DMerit Engy CoActiveEnhanced recovery412K6,0004,100–5,800Jan 11, 2007
Garza, A.M. - State #6DMerit Engy CoActiveEnhanced recovery314K2,0002,400–3,450Aug 27, 2004
Olivares, Agustin #21Killam Oil Co., LtdActiveEnhanced recovery226K3,0003,070–3,842Jul 21, 2004
Yzaguirre #3R360 Env Solutions of TX, LLCActiveEnhanced recovery148K10,0004,700–5,900Oct 6, 2021
Samano #21Petrovybe Opco LLCActiveDisposal146K6,0002,700–3,600Jan 7, 2002
Villarreal #1Merit Engy CoActiveDisposal108K10,0003,635–5,660Jun 17, 2008
Guerra "a" SWD #1Merit Engy CoActiveDisposal52.3K2,5001,500–3,400Sep 24, 2024
Heard #1Dewbre Petro CorpActiveEnhanced recovery40.6K5,0003,908–4,338Nov 1, 2019
LA Brisa Ranch 907-1 #1Trap Rock Oil, LtdActiveEnhanced recovery40.5K5,0003,500–3,950Dec 10, 2008
Frost Natl. Bank Ind. Ex. -B- #609Mountain V Texas, LLCActiveEnhanced recovery32.4K3,6003,200–3,755Jul 7, 2015
Bloomberg, Samuel D. #18Hilcorp Engy CoActiveDisposal32.1K1,2004,300–5,200Sep 9, 2005
Zarsky #1Mortimer Prod CoActiveDisposal31.9K5,000700–1,400Nov 5, 1999
Margo #9Starr Oper, LLCActiveEnhanced recovery25.8K5002,242–2,874Oct 9, 2019
Garcia, Esteban #1Escudo Oil & Gas, LLCActiveEnhanced recovery24.1K2,0003,000–3,600Aug 1, 2007
Slick, T.B. Est. A-485 #183Hilcorp Engy CoActiveEnhanced recovery21.2K5,0004,880–5,570Jan 29, 1999
Bloomberg, Samuel D. #22Hilcorp Engy CoActiveEnhanced recovery15.9K1,2004,175–5,100Apr 16, 2010
Murch, B. L. #26Faulconer Engy, LLCActiveDisposal14.7K7503,100–3,846Mar 15, 2016
Martinez "B" #28Hilcorp Engy CoActiveDisposal3.41K8002,430–2,455Jul 16, 1991
DE Lopez, C. V. -A- #10L & B Oil and Gas Equipment, LLCActiveEnhanced recovery3.34K3005,840–5,892Jan 24, 2020
Slick T.B. Estate "B" 528 #245Hilcorp Engy CoActiveEnhanced recovery2.66K6,0004,800–5,540Mar 9, 2011
Cleopatra #2Orx Res, L.L.CActiveDisposal1.89K2,0002,795–3,055Mar 19, 2007
Guerra Share 305-D #9WDSouthern Tejas Asset Group LLCActiveDisposal8609001,050–1,350Oct 9, 1974
Fuerte Vida Waterflood Unit #P 1AAlpha Oil & Gas LLCActiveEnhanced recovery—10,0003,400–4,925Jan 11, 2023
Sekula, F. #1Vac Stop SWD, LLCActiveDisposal—6,5002,700–3,600Aug 22, 2000
Greiner #1Vac Stop SWD, LLCActiveDisposal—5,5001,600–1,850Sep 1, 2017
Slick, T.B. Estate #2Merit Engy CoActiveDisposal—5,0003,540–3,580Oct 14, 2002
Thomas, Mary S. #3 UMerit Engy CoActiveEnhanced recovery—5,0003,550–4,950Jan 26, 2007
Slick, T. B. A-229 #191Hilcorp Engy CoActiveDisposal—5,0002,140–3,032Mar 5, 2004
Hermann, A.G. Gas Unit #1Mountain V Texas, LLCActiveEnhanced recovery—5,0004,575–4,916Apr 27, 2009
Sekula, Frank #2Vac Stop SWD, LLCActiveDisposal—5,0002,700–3,800May 2, 2008
Frost National Bank -B- #35Mountain V Texas, LLCActiveEnhanced recovery—4,0003,730–4,000Nov 3, 2006
Frost Natl. Bank Ind. Ex. -B- #622WIMountain V Texas, LLCActiveEnhanced recovery—3,6003,719–3,756Aug 9, 1993
Garcia, I.Y. #1WIMountain V Texas, LLCActiveEnhanced recovery—3,0004,200–4,850Jan 30, 1989
Garcia, I. Y. #16Mountain V Texas, LLCActiveEnhanced recovery—3,0004,294–4,830Aug 23, 2002
Olivares, Agustin #2Killam Oil Co., LtdActiveEnhanced recovery—2,5001,400–3,860Jul 23, 2004
Frost Natl. Bank Ind. Ex. -B- #605Mountain V Texas, LLCActiveEnhanced recovery—2,4003,733–3,740—
Bloomberg, S. D. #9Hilcorp Engy CoActiveEnhanced recovery—2,0002,650–4,410Dec 29, 2009
Guerra Share 20 Oil Unit #16Southern Tejas Asset Group LLCActiveDisposal—1,500970–1,300Feb 6, 2002
Guerra, A. "B" Unit #7Orx Res, L.L.CActiveEnhanced recovery—1,5005,080–5,170Dec 22, 2004
Villarreal #4Wagner Oil CoActiveEnhanced recovery—1,0005,150–6,445Jan 18, 2006
Brock, J. D. -A- #6Southern Tejas Asset Group LLCActiveEnhanced recovery—4002,247–2,249Aug 21, 1995
Flores Unit #2Trap Rock Oil, LtdActiveEnhanced recovery—5,0004,100–4,935Jun 22, 2010
McKinney, Amanda #38Killam Oil Co., LtdActiveEnhanced recovery—3,0004,790–5,200Oct 3, 2024
Yzaguirre #2Merit Engy CoActiveDisposal—2,5002,350–4,000Dec 4, 2025
Flores Unit #1Trap Rock Oil, LtdActiveDisposal—2,0004,739–5,540Nov 10, 2008
Morse #1Faulconer Engy, LLCCancelledEnhanced recovery10.4K5003,370–4,810Mar 27, 2019
Fuerte Vida Waterflood Unit #1Alpha Oil & Gas LLCCancelledEnhanced recovery—10,0003,800–4,700Jan 5, 2018
Fuerte Vida Waterflood Unit #4WAlpha Oil & Gas LLCCancelledEnhanced recovery—10,0003,400–4,925Jan 22, 2018
Fuerte Vida Waterflood Unit #3WAlpha Oil & Gas LLCCancelledEnhanced recovery—10,0003,400–4,925Jan 24, 2018
Fuerte Vida Waterflood Unit #7WAlpha Oil & Gas LLCCancelledEnhanced recovery—10,0003,400–4,925Jan 22, 2018
Fuerte Vida Waterflood Unit #P 5Alpha Oil & Gas LLCInactiveEnhanced recovery—10,0003,400–4,925Jan 11, 2023
Garcia L&L Co. #A 16Mountain V Texas, LLCInactiveEnhanced recovery—3,6002,030–2,900Feb 14, 2007
McGill Bros. #211DOverton Park Oil & Gas LPCancelledEnhanced recovery—2,0004,723–5,893Apr 8, 1996
Garcia SWD #1Black Gold Petro, LLCCancelledDisposal—1,5001,820–1,830Sep 5, 2019
H P Saenez #103Tammany Expl Co LLCCancelledEnhanced recovery—15,0004,080–4,820Jul 22, 2015
G P Saenz #104Tammany Expl Co LLCCancelledEnhanced recovery—15,0004,080–4,820Sep 29, 2015
Slick, T. B. A-229 #193Conoco IncCancelledEnhanced recovery—10,0005,800–6,000Aug 20, 2001
Slick, T. B. A-229 #194Conoco IncCancelledEnhanced recovery—10,0005,800–6,000Aug 20, 2001
Slick, T. B. A-229 #195Conoco IncCancelledEnhanced recovery—10,0005,800–6,000Aug 20, 2001
Argentina SWD #1DTrinity Environmental Swd,l.l.cPluggedDisposal—10,0001,600–3,500May 2, 2008
Slick, T. B. A-229 #179Conoco IncCancelledEnhanced recovery—9,0005,882–6,000Aug 20, 2001
Yzaguirre, Manuel #7Texas Injection, L.P.PluggedDisposal—8,0002,300–3,000Dec 23, 1994
Slick, T. B. Estate -B- #140Conocophillips CoCancelledEnhanced recovery—7,5004,500–5,400May 13, 1994
Samano #2EL Paso Prod Oil & Gas CoCancelledDisposal—6,0002,830–3,200Aug 16, 2001
Samano, M. #1Trinity River Engy Oper, LLCPluggedDisposal—6,0002,988–3,202Nov 28, 2001
Yzaguirre, Manuel #2Texas Injection, L.P.PluggedDisposal—5,0002,300–4,616Mar 2, 1999
DE Lopez, C. V. -A- #2Bellows Oper Co., L. CPluggedEnhanced recovery—5,0005,142–5,146Jul 15, 2009
Yzaguirre, Manuel #4Texas Injection, L.P.CancelledDisposal—5,0002,250–4,200Sep 13, 1991
Boston Texas Land Trust #1 #1The Legacy CorpCancelledEnhanced recovery—5,0005,050–5,640Oct 25, 1995
Zamora SWD #1EL Paso Prod Oil & Gas CoCancelledDisposal—5,0003,000–3,600Aug 20, 2003
Slick, T. B. Est "B" 528 #163 #163Forest Oil CorpPluggedEnhanced recovery—5,0003,481–3,492Aug 6, 2004
Fuentes, J. R. #1Orphan Wells, LLCCancelledEnhanced recovery—5,0002,586–2,608Mar 6, 2006
LA Brisa Ranch / State 542 #14Trap Rock Oil, LtdPluggedEnhanced recovery—5,0003,500–5,100Jan 5, 2007
LA Brisa Ranch 907 #6Trap Rock Oil, LtdPluggedEnhanced recovery—5,0002,330–2,500Dec 10, 2008
Samano #22Petrovybe Opco LLCInactiveDisposal—5,0003,028–3,182May 4, 2009
Samano, M. "C" #2Fletcher Oper, LLCPluggedDisposal—5,0003,104–3,266Feb 25, 2010
Frost -a- Sand Unit #613Sun Expl. & Prod. Co.-HoustonCancelledEnhanced recovery—4,0003,743Nov 12, 1981
Olivares, A. #6Sun Expl. & Prod. Co.-HoustonCancelledDisposal—3,5004,615–4,636Feb 19, 1988
Olivares, Agustin #11Sanchez-O'Brien Oil & Gas CorpCancelledDisposal—3,5004,628–4,670Feb 19, 1988
Olivares, Agustin #20Kerr-McGee Oil & Gas Onshore LLCCancelledDisposal—3,5004,555–4,582Nov 20, 1992
McGill Bros #536Youngblood, C. S. IIICancelledEnhanced recovery—3,5006,220–6,265Sep 5, 1989
Garcia-Ramirez Unit 10 #1Sun Expl. & Prod. Co.-MidlandPluggedOther—3,5004,099–4,118Dec 2, 1971
Garcia, M. M., "A" #5Sun Expl. & Prod. Co.-HoustonPluggedOther—3,5003,809–4,110Sep 30, 1970
Slick, T.B. Estate -a- 485 #18Forest Oil CorpPluggedDisposal—3,0001,680–3,140Jun 30, 1992
McGill Bros. #230DYoungblood, C. S. IIICancelledEnhanced recovery—3,0005,138–5,510May 31, 1996
Slick, T. B. -B- Est. #38Conoco IncCancelledEnhanced recovery—3,0003,745–3,760May 27, 1993
LA Brisa Ranch 907 #3Trap Rock Oil, LtdCancelledDisposal—3,0003,890–3,920Feb 19, 2004
McGill Bros. #230Youngblood, C. S. IIICancelledEnhanced recovery—3,0005,138–5,510May 31, 1996
McKinney, Mrs. Amanda #29Killam Oil Co., LtdCancelledEnhanced recovery—3,0003,540–3,660Oct 12, 2010
Slick Est. -C- #6Mountain V Texas, LLCInactiveDisposal—2,5004,861–4,880Aug 26, 2003
Frost -a- Sand Unit #G 5Sun Expl. & Prod. Co.-HoustonCancelledOther—2,5003,428–3,433Nov 15, 1971
Frost Natl. Bank Ind. Ex. -B- #603Smith Prod IncCancelledEnhanced recovery—2,3333,730–3,756May 17, 2011
Miller C-1 Sand Unit #103Sunoco Operations, Inc.PluggedOther—2,2004,161–4,167Jul 21, 1977
McGill, J.C. Jr. State #303Humble Oil & Refining Co.PluggedOther—2,1005,969–5,975Apr 6, 1972
McGill, J.C. Jr. State #422Youngblood, C. S. IIICancelledOther—2,0005,998–6,028Dec 15, 1970
Slick, T. B. -H- Est. #64Conoco IncCancelledEnhanced recovery—2,0003,935–3,950Mar 11, 1988

Latest disposal drilling permits

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

IssuedPermitOperatorLease / well
May 5, 2008660120J & R ContractorsArgentina SWD #1D 42701556
Jun 20, 2003533353EL Paso Production Oil & Gas Co.Zamora SWD #1 42733626
Jan 25, 1996444111Nopal Gathering CorporationIzaguirre SWD #1 42732827
May 18, 1993411413Coastal Oil & Gas CorporationGuerra "a" SWD #1 42732571
Jan 29, 198071087Sun Expl. & Prod. Co.-CorpusMontalvo, I. V. "C" #12D 42700580
Jan 17, 198070013Sun Expl. & Prod. Co.-CorpusSaenz, M. St. #20 D 42704529
Jan 17, 198070006Sun Expl. & Prod. Co.-CorpusSaenz, M. St. #14 D 42701111
Aug 30, 197956744Shell Oil CompanyBentsen Bros. "B" #1D 42701336
Oct 26, 197710650Shell Oil CompanyGarza, A. M. - State #11 42701301

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/starr, documented in the API reference.