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 Energy Company 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 Energy Company2.85M1048K
Southern Tejas Asset Group LLC486K417.8K
Killam Oil Co., Ltd.226K38.5K
R360 Env Solutions of TX, LLC148K110K
Petrovybe Opco LLC146K16K
Hilcorp Energy Company75.3K721.2K
Dewbre Petroleum Corporation40.6K15K
Trap Rock Oil, Ltd.40.5K312K
Mountain V Texas, LLC32.4K724.6K
Mortimer Production Company31.9K15K
Starr Operating, LLC25.8K1500
Faulconer Energy, LLC25.1K1750
Escudo Oil & Gas, LLC24.1K12K
L & B Oil and Gas Equipment, LLC3.34K1300
Orx Resources, L.L.C.1.89K23.5K
Vac Stop SWD, LLC—317K
Alpha Oil & Gas LLC—110K
Wagner Oil Company—11K

Injection permits

424 UIC PERMITS · 49 ACTIVE · PAGE 2 OF 5

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

WellOperatorStatusPurposeReported, bblbbl/d permittedZone, ftPermitted
Montalvo, I. V. -C- #12Sun Expl. & Prod. Co.-CorpusCanceledDisposal—2,0004,320–4,336Feb 15, 1980
Frost -a- Sand Unit #621Sun Expl. & Prod. Co.-CorpusCanceledEnhanced recovery—2,0003,423–3,430Mar 29, 1982
Davenport, D. - State #19NabcoCanceledDisposal—2,0003,912–3,923Mar 9, 1989
Frio E Unit -B- #33Conoco Inc.CanceledEnhanced recovery—2,0003,800–3,930Mar 11, 1988
La Brisa Ranch/State 542 #9Trap Rock Oil, Ltd.CanceledEnhanced recovery—2,0001,400–4,500Apr 15, 2004
Izaguirre SWD #1Merit Energy CompanyPluggedDisposal—2,0003,350–3,750Nov 20, 1996
Alvarado, D. #2Cantera Operating, LLCPluggedDisposal—2,0003,800–3,850Jun 1, 2000
La Brisa Ranch / State 542 #5Trap Rock Oil, Ltd.CanceledEnhanced recovery—2,0004,020–4,600May 17, 2004
La Brisa Ranch/State 542 #3Trap Rock Oil, Ltd.PluggedEnhanced recovery—2,0004,050–4,550Mar 31, 2004
Laurel, C. #7Boundary Ventures, Inc.CanceledEnhanced recovery—2,0005,490–5,550Apr 15, 2004
Barrera #1Coronado Energy E&P Company, LLCCanceledEnhanced recovery—2,0005,160–5,340Dec 5, 2008
McGill, J.C. Jr. State #284Humble Oil & Refining Co.PluggedOther—2,0005,980–5,993Apr 30, 1971
Hall, J. F. - State #8Sun Expl. & Prod. Co.-CorpusPluggedOther—2,0004,388–4,397Oct 17, 1975
Hall, J. F. - State #11Sun Expl. & Prod. Co.-CorpusPluggedOther—2,0004,382–4,386Jan 27, 1977
Yturria L & L #2Trap Rock Oil, Ltd.InactiveEnhanced recovery—2,0004,379–4,850Mar 3, 2020
McGill, J.C. Jr. State #262 FExxon Corp.CanceledOther—1,5006,020–6,058Oct 11, 1961
McKinney, Amanda, Mrs. #3Sun Exploration & Production Co.CanceledDisposal—1,5004,195–4,224Sep 3, 1976
Fee #35DOsborn Heirs CompanyCanceledDisposal—1,5003,306–3,358Jul 16, 1980
Garza, A.M.-State #11Shell Western E&P Inc.CanceledDisposal—1,5002,075–3,050May 22, 1989
McGill Bros. #336Exxon Mobil CorporationPluggedEnhanced recovery—1,5005,240–5,249Aug 6, 1985
McGill, J.C. Jr. State #232Exxon Corp.CanceledOther—1,5005,999–6,037—
Garza, A.M. State #7Shell Western E&P Inc.CanceledDisposal—1,5002,200–4,794Sep 18, 1989
Heard, J. F. B. #1AScorpion Operating, Inc.CanceledEnhanced recovery—1,5003,009–3,808May 15, 1997
Alvarado, Daniel #3Merit Energy CompanyPluggedDisposal—1,5003,715–4,615Apr 17, 2002
Lanita #1Lanita Oil, LLCInactiveEnhanced recovery—1,5002,400–2,850Mar 28, 2014
Speer, George H., State -B- #20Sun Exploration & Production Co.PluggedOther—1,5004,994–5,008Jul 1, 1974
Speer, George H., State -B- #17Sun Exploration & Production Co.CanceledOther—1,5004,959–4,964Nov 12, 1974
Fuerte Vida Waterflood Unit #P 3Alpha Oil & Gas LLCInactiveEnhanced recovery—1,5003,400–4,925May 3, 2023
McKinney, Mrs. Amanda #1WISun Exploration & Production Co.CanceledOther—1,3004,994–5,003Jul 31, 1972
Brannan, John -A- #5Petrohawk Operating CompanyPluggedDisposal—1,2005,010–5,278Jun 2, 1978
Villarreal #6Wagner Oil CompanyPluggedEnhanced recovery—1,2006,112–6,127Dec 27, 1968
Slick, T. B., Est. #38Tenneco Oil Co.CanceledDisposal—1,2002,420–2,464May 13, 1965
Alvarado, Daniel Unit #1Merit Energy CompanyPluggedDisposal—1,2003,800–3,850Feb 24, 1994
Montalvo, I. V. -C- #33UTSun Exploration & Production Co.PluggedOther—1,2004,325–4,344Aug 3, 1965
Zamora - State #1Greenbrier Oper. Co.CanceledDisposal—1,1003,220–3,260Dec 21, 1987
Frio D-5 Unit #36Conoco Inc.CanceledOther—1,0003,805–3,824Aug 29, 1973
Frio D-5 Unit #39Conoco Inc.CanceledOther—1,0003,847–3,852Aug 29, 1973
Frio D-5 Unit #46Conoco Inc.CanceledOther—1,0003,839–3,868Jun 9, 1975
Montalvo, I. V. -A- #6Oryx Energy CompanyCanceledEnhanced recovery—1,0004,850–4,865Mar 27, 1972
Villarreal #3Osborn Heirs CompanyCanceledOther—1,0005,180–5,204Apr 20, 1972
Martinez -B- #12Cities Service Oil & Gas Corp.CanceledDisposal—1,0002,200–2,291Aug 7, 1967
Saenz, M.-State #12Oryx Energy CompanyCanceledDisposal—1,0004,728–4,738Jun 23, 1980
Slick, T. B. -B- Est. #143Conoco Inc.CanceledEnhanced recovery—1,0004,174–4,214Jul 18, 1972
Wood, D. G., Sr. -A- #4Poor Boy Oilfield ServicePluggedEnhanced recovery—1,0001,585–1,595Sep 25, 1990
Garza, A.M. #5DShell Western E&P Inc.CanceledDisposal—1,0002,011–3,510Sep 26, 1967
Slick, T. B. Estate #7Tenneco Oil Co.CanceledDisposal—1,0001,820–1,895Sep 26, 1986
Montalvo, I. V. -C- #20Oryx Energy CompanyCanceledEnhanced recovery—1,0004,803–4,833Aug 18, 1987
Villarreal #5 CEnergy Development Corp.CanceledEnhanced recovery—1,0005,771–5,777Aug 19, 1964
Villarreal #12Energy Development Corp.CanceledEnhanced recovery—1,0005,738–5,747Aug 19, 1964
Fee #13Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,955–4,971Jul 1, 1988
Fee #15Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,950–4,985Jul 1, 1988
Fee #16Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,961–4,981Jul 1, 1988
Fee #17Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,938–4,978Jul 1, 1988
Fee #21Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,970–4,984Jul 1, 1988
Fee #23Osborn Heirs CompanyCanceledEnhanced recovery—1,0004,954–4,986Jul 1, 1988
Slick, T. B. -B- Est. #97Conoco Inc.CanceledEnhanced recovery—1,0003,970–3,990Oct 7, 1963
Slick, T. B. -B- Est. #112Conoco Inc.CanceledEnhanced recovery—1,0004,143–4,156Dec 28, 1964
Slick, T. B. -B- Est. #87Conoco Inc.CanceledEnhanced recovery—1,0003,990–4,004Aug 29, 1966
State/Slick #1Esenjay Exploration, IncCanceledDisposal—1,0005,103–5,213Jan 29, 1997
M. E. Evans et al Unit #2SDBNP Petroleum CorporationPluggedEnhanced recovery—1,0005,740–5,780Jul 30, 2002
Vannie Cook Trust #1Coastal States Gas Prod. Co.CanceledOther—1,000342–360Sep 19, 1966
Vannie Cook Trust #2Coastal States Gas Prod. Co.CanceledOther—1,000390–407Sep 19, 1966
Miller C-1 Sand Unit #703 LSun Expl. & Prod. Co.-CorpusCanceledEnhanced recovery—1,0004,156–4,162Apr 2, 1979
Frost National Bank Ind. Ex. -B- #6LTSun Expl. & Prod. Co.-CorpusPluggedOther—1,0004,095–4,117Aug 6, 1965
Guerra, M. "A" #19Sun Exploration & Production Co.CanceledOther—1,0002,200–2,250Aug 4, 1969
McGill Bros. #182 THumble Oil & Refining Co.PluggedOther—1,0006,100–6,109Jan 6, 1970
Speer, Geo. H. #1Sun Expl. & Prod. Co.-CorpusPluggedOther—1,0004,966–5,072Jun 24, 1971
Sun Field Waterflood Unit No. 1 #9Humble Oil & Refining Co.PluggedOther—1,0004,857–4,887Mar 17, 1969
D-1-B Sand Unit #51Sun Expl. & Prod. Co.-CorpusPluggedOther—1,0004,721–4,730May 1, 1967
Sun Field Waterflood Unit No. 2 #3 FHumble Oil & Refining Co.PluggedOther—1,0004,883–4,894Mar 17, 1969
Fee #6Osborn, W. B. OperatorPluggedOther—1,0005,190–5,198Nov 26, 1968
Fee #11Osborn, W. B. OperatorPluggedOther—1,0005,174–5,182Nov 26, 1968
Montalvo, N. R. #17Humble Oil & Refining Co.CanceledOther—1,0004,882–4,902Aug 27, 1968
Saenz, Vicente #4Humble Oil & Refining Co.PluggedOther—1,0004,925–4,937Sep 9, 1968
Montalvo, N. R. #2Humble Oil & Refining Co.CanceledOther—1,0004,916–4,927Apr 26, 1971
Montalvo, N. R. & E. A. #22Humble Oil & Refining Co.CanceledOther—1,0004,948–4,968Aug 27, 1968
Montalvo, N. R. #44Triad O&G, LLCInactiveEnhanced recovery—1,0004,490–4,580Feb 11, 2025
Slick, T. B., Estate -E- #25Continental Oil CompanyPluggedOther—8505,505–5,620Sep 5, 1973
Slick, T. B., Estate -E- #27Continental Oil CompanyPluggedOther—8505,456–5,540Sep 5, 1973
Bloomberg, S. D. #1Apache CorporationPluggedDisposal—8002,300–2,700Feb 4, 1974
Saenz, M.-State #20Sun Expl. & Prod. Co.-CorpusCanceledDisposal—8004,770–4,787Feb 11, 1980
Saenz, M.-State #14Sun Exploration & Production Co.CanceledDisposal—8004,771–4,787Feb 28, 1980
Garza, D. L. #2Jilpetco, Inc.PluggedDisposal—8004,160–4,370Jun 10, 1983
San Roman,e (Hcly) Wtrfld Unt #B 58Exxon Corp.CanceledEnhanced recovery—8003,741–3,749Apr 22, 1987
Villarreal #9Wagner Oil CompanyCanceledDisposal—8004,268–4,713Sep 1, 1989
San Roman,e (Hcly) Wtrfld Unt #F 6Exxon Mobil CorporationCanceledEnhanced recovery—8003,740–3,775May 18, 1994
Slick, T. B., Estate -A- #17Conoco Inc.CanceledDisposal—8004,212–4,228Aug 24, 1973
Chapotal Land Co. -A- #26Oryx Energy CompanyCanceledDisposal—8004,174–4,230May 21, 1992
Don Cameron Etal Unit #3AWagner Oil CompanyInactiveDisposal—8004,440–4,730Jun 4, 2004
Claude King Sr. #8Tenneco Oil Co.CanceledOther—8004,042–4,045Apr 1, 1969
Frio E Unit -B- #700Continental Oil CompanyPluggedOther—8003,814–3,834Oct 19, 1965
Slick, T. B. -H- Est. #46Continental Oil CompanyPluggedOther—8003,830–3,846Dec 28, 1964
Slick, T. B. -H- Est. #68Continental Oil CompanyPluggedOther—8003,866–3,875Dec 28, 1964
Slick, T. B. -B- Est. #7Continental Oil CompanyPluggedOther—8003,824–3,850Dec 28, 1964
Slick, T. B. -B- Est. #11Continental Oil CompanyPluggedOther—8003,872–3,888Dec 28, 1964
Slick, T. B. -B- Est. #19Continental Oil CompanyPluggedOther—8003,859–3,888Dec 28, 1964
Slick, T. B. -B- Est. #43Continental Oil CompanyPluggedOther—8003,805–3,825Dec 28, 1964
Slick, T. B. -B- Est. #44Continental Oil CompanyPluggedOther—8003,818–3,836Dec 28, 1964
Slick, T. B. -B- Est. #49Continental Oil CompanyCanceledOther—8003,897–3,912Dec 28, 1964
Slick, T. B. -B- Est. #57Continental Oil CompanyPluggedOther—8003,917–3,936Dec 28, 1964

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.