Petrora

WATER · MONTGOMERY COUNTY

Produced water and disposal in Montgomery 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 →

Montgomery County has 64 active injection and disposal wells, 49 of them permitted for disposal, with 1.2 million barrels a day of permitted capacity.

Operators reported 60 million barrels injected on H-10 filings in the twelve months to September 2025, up 0% on the year before, about 14% of what the permits allow.

Highmark Energy Operating, LLC is the largest injector in the county, with 58 million barrels reported across 44 active wells.

64
active injection wells, 49 for disposal
1.2M
bbl/d permitted capacity
60.2M
bbl reported, H-10 year to Sep 2025 +0%
14%
of permitted capacity used
252
UIC permits on file, all time

Reported injection, by month

H-10 FILINGS · TEN YEARS TO SEP 2025

Last 12 months 60,184,698 · prior 12 60,315,809(0%)

05M10M2016201720182019202020212022202320242025

Who injects here

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

OperatorReported, bblActive wellsCapacity bbl/d
Highmark Energy Operating, LLC58.5M441.12M
Daylight Petroleum LLC960K928.3K
Wheeler Operating Corporation733K750K
Galloway Lone Star, L.L.C.12012.5K
Galloway Energy Co.41700
Hilliard-Bender Energy, LLC—15K
Gaither Petroleum Corporation—11K

Injection permits

252 UIC PERMITS · 64 ACTIVE · PAGE 2 OF 3

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

WellOperatorStatusPurposeReported, bblbbl/d permittedZone, ftPermitted
Conroe Field Unit #98DHighmark Energy Operating, LLCInactiveDisposal—25,0002,400–4,100Apr 6, 1995
Conroe Field Unit #105DHighmark Energy Operating, LLCInactiveDisposal—25,0002,400–4,020Apr 6, 1995
Conroe Field Unit #1403Highmark Energy Operating, LLCInactiveDisposal—25,0001,950–3,650Apr 6, 1995
Conroe Field Unit #109DDenbury Onshore, LLCPluggedDisposal—25,0002,860–4,400Aug 23, 1996
Conroe Field Unit #118DDenbury Onshore, LLCPluggedDisposal—25,0002,500–3,856Nov 6, 1997
Conroe Field Unit #17WDenbury Onshore, LLCCanceledDisposal—25,0004,748–6,184Apr 23, 2008
Moore, H. N. #46Highmark Energy Operating, LLCInactiveDisposal—25,0004,732–5,180May 8, 2008
Conroe Field Unit #519DHighmark Energy Operating, LLCInactiveDisposal—25,0004,600–6,300Jul 10, 2008
Conroe Field Unit #2315Denbury Onshore, LLCCanceledDisposal—25,0003,400–6,300Aug 19, 2009
Keystone Mills #40Highmark Energy Operating, LLCInactiveDisposal—25,0004,600–6,300Mar 31, 2009
Conroe Field Unit #2017Denbury Onshore, LLCCanceledEnhanced recovery—25,0004,600–5,130Jun 18, 2010
Conroe Field Unit #1617Highmark Energy Operating, LLCInactiveEnhanced recovery—25,0004,662–5,128Sep 6, 2011
Conroe Field Unit #4013Highmark Energy Operating, LLCInactiveEnhanced recovery—24,5002,675–5,300Mar 3, 2020
Conroe Field Unit #3105Highmark Energy Operating, LLCInactiveDisposal—24,0003,775–5,115Jun 24, 2021
Conroe Field Unit #1115Highmark Energy Operating, LLCInactiveDisposal—24,0003,800–5,100Jun 24, 2021
Conroe Field Unit #4DExxon Corp.CanceledDisposal—20,0002,200–3,800Feb 28, 1991
Conroe Field Unit #3DExxon Corp.CanceledDisposal—15,0002,250–3,170May 19, 1976
Conroe Field Unit #7DExxon Corp.CanceledDisposal—15,0001,960–3,166Apr 26, 1976
Conroe Field Unit #9DExxon Corp.CanceledDisposal—15,0002,090–3,760Jan 7, 1977
Conroe Field Unit #15DExxon Corp.CanceledDisposal—15,0002,250–3,175May 7, 1976
Conroe Field Unit #16DExxon Corp.CanceledDisposal—15,0002,470–3,296May 4, 1976
Conroe Field Unit #23DExxon Corp.CanceledDisposal—15,0001,960–3,488Jul 20, 1981
Conroe Field Unit #28DExxon Corp.CanceledDisposal—15,0002,600–3,900Mar 10, 1981
Conroe Field Unit #83 DExxon Corp.CanceledDisposal—15,0002,600–3,950Oct 17, 1980
Conroe Field Unit #93DExxon Corp.CanceledDisposal—15,0002,500–4,000Oct 22, 1981
Conroe Field Unit #92DExxon Corp.CanceledDisposal—15,0002,500–4,000Oct 22, 1981
Conroe Field Unit #87DExxon Corp.CanceledDisposal—15,0002,500–4,000Mar 16, 1981
Conroe Field Unit #85DExxon Corp.CanceledDisposal—15,0002,500–4,000Mar 10, 1981
South Texas Development Co. -G- #201Exxon Corp.CanceledDisposal—15,0002,030–3,800Sep 30, 1976
Madeley, A. A. & Madeley, D. A. #50DExxon Corp.CanceledDisposal—15,0002,085–3,032Apr 26, 1976
Cartwright, R. L. -A- #14DExxon Corp.CanceledDisposal—15,0002,040–3,320May 4, 1976
Conroe Field Unit #81DExxon Corp.CanceledDisposal—15,0002,345–4,000Apr 8, 1981
Conroe Field Unit #2DExxon Corp.CanceledDisposal—10,0002,380–3,125Aug 11, 1983
Conroe Field Unit #6DExxon Corp.CanceledDisposal—10,0002,180–3,800Oct 25, 1993
Conroe Field Unit #12DExxon Corp.CanceledDisposal—10,0002,330–3,340Dec 30, 1982
Conroe Field Unit #66DExxon Corp.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Conroe Field Unit #68DExxon Corp.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Conroe Field Unit #71DExxon Corp.CanceledDisposal—10,0002,400–4,000May 17, 1979
Conroe Field Unit #72DExxon Corp.CanceledDisposal—10,0002,400–4,250Aug 1, 1979
Conroe Field Unit #73DExxon Corp.CanceledDisposal—10,0002,650–4,000Aug 1, 1979
Moore, H. N. #1Exxon Corp.CanceledDisposal—10,0002,550–3,010Oct 28, 1982
Cardinal Well Service #1Conroe Vacuum Truck Service, IncCanceledDisposal—10,0002,600–3,600Mar 29, 1984
Keystone Mills #15Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Keystone Mills #12Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Keystone Mills #14Cockfield Company, Inc.CanceledDisposal—10,0002,450–3,940Jul 1, 1976
Keystone Mills #13Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Keystone Mills #9Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
Keystone Mills #10Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
C. M. Dean -B- #10Cockfield Company, Inc.CanceledDisposal—10,0002,400–3,940Jul 1, 1976
South Texas Dev. Co. Fee -B- #12DExxon Corp.PluggedDisposal—10,0001,840–3,195May 4, 1976
Conroe Field Unit #1309Exxon Corp.CanceledDisposal—10,0002,030–3,800Oct 21, 1976
Conroe Field Unit #34DExxon Corp.CanceledDisposal—7,5002,400–3,810Sep 10, 1976
Gibbs #1RBadger Energy, Inc.PluggedDisposal—7,0002,400–3,742Jun 19, 2001
Bender Estate -A- #5DKP Exploration, Inc.CanceledDisposal—6,0002,420–6,200Jun 18, 1976
Bender Unit #601Atlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,804–5,808Jul 24, 1964
Bender Unit #2501Atlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,837–5,845Jul 24, 1964
Bender Unit #3002CAtlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,810–5,820Jul 24, 1964
Bender Unit #4001Atlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,850–5,855Jul 24, 1964
Bender Unit #4103Atlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,843–5,848Jul 24, 1964
Bender Unit #3010Atlantic Richfield Co.-CorpusCanceledEnhanced recovery—5,7005,818–5,822Jul 24, 1964
Conroe Field Unit #55DExxon Corp.CanceledDisposal—5,0002,400–3,940Jul 1, 1976
Conroe Field Unit #69DExxon Corp.CanceledDisposal—5,0002,400–3,940Oct 4, 1993
M. Harris Unit #1Geosouthern Energy CorporationCanceledDisposal—5,0002,460–5,817Aug 13, 1990
Conroe Field Unit #14DExxon Corp.CanceledDisposal—4,0002,500–4,100Apr 20, 1976
Conroe Field Unit #43DExxon Corp.CanceledDisposal—4,0002,500–4,100Apr 20, 1976
Conroe Field Unit #44DExxon Corp.CanceledDisposal—4,0002,500–4,100Nov 26, 1975
Bender Estate -C- #3Xeric Oil & Gas CorporationCanceledDisposal—4,0002,700–3,200Nov 19, 1998
Tyra, Lewis #1Hilliard-Bender Energy, LLCCanceledDisposal—4,0003,940–4,300Jun 10, 1991
Conroe Field Unit #1210IExxon Corp.CanceledEnhanced recovery—3,0005,120–5,141Sep 11, 1981
Champion #1 DBishop, Travis LCanceledDisposal—3,0002,900–3,000Jan 12, 2010
Lewis, J. W. -A- #2Getty Oil Co.CanceledDisposal—3,0002,510–3,830May 7, 1976
Conroe Field Unit #51DWheeler, W. Ridley, Est.CanceledDisposal—3,0002,362–3,750Jun 18, 1976
Conroe Field Unit #32DExxon Corp.CanceledDisposal—2,9852,735–3,817May 7, 1976
Conroe Field Unit #4127Denbury Onshore, LLCPluggedDisposal—2,7505,000Oct 14, 1963
Conroe Field Unit #27DExxon Corp.CanceledDisposal—2,5002,000–3,950Oct 13, 1993
St. Regis #3 DGould Oil Inc.CanceledDisposal—2,5002,600–2,700May 20, 1981
St. Regis #2DGould Oil Inc.CanceledDisposal—2,5002,560–2,740May 20, 1981
So. Tex. Dev. -A- #27East Texas Production Mgt. IncPluggedDisposal—2,0001,870–4,100Feb 10, 1984
Conroe Field Unit #621IExxon Corp.CanceledEnhanced recovery—2,0005,019–5,072Sep 18, 1969
Wiggins-Athey A/C-1 #1DThornberry Oilfield Service, IncCanceledDisposal—2,0002,309–3,250Aug 4, 1987
Conroe Field Unit #29DExxon Corp.CanceledDisposal—2,0003,000–3,200May 7, 1976
Conroe Field Unit #1006IExxon Corp.CanceledDisposal—2,0001,900–3,900Feb 24, 1984
Friendswood #1DPresidio Exploration, Inc.CanceledDisposal—2,0003,010–3,030Sep 22, 1986
Friendswood SWD #1DEclipse Services, Inc. *CanceledDisposal—2,0003,010–3,030Sep 22, 1986
Ctou SWD #1Comet Oil & Gas, Inc.CanceledDisposal—2,0002,750–3,650Aug 5, 1954
Conroe Field Unit #603Humble Oil & Refining Co.PluggedEnhanced recovery—2,0005,010–5,050Sep 18, 1969
Conroe Field Unit #144Humble Oil & Refining Co.CanceledEnhanced recovery—2,0004,986–5,028Sep 18, 1969
Conroe Field Unit #605Humble Oil & Refining Co.PluggedEnhanced recovery—2,0005,004–5,058Sep 18, 1969
Conroe Field Unit #20DExxon Corp.CanceledDisposal—1,5003,100–3,400Nov 27, 1970
Wiggins, W. R. #1Thornberry Oilfield Service, IncCanceledDisposal—1,5003,760–3,820Jul 27, 1994
Fitch, Mary Louise #9Geosouthern Energy CorporationCanceledDisposal—1,5002,450–2,650Jul 23, 1987
— #4Hunt, Lamar, Trust EstateCanceledEnhanced recovery—1,5006,076–6,081Sep 1, 1964
Hooper, Fannie #2Five-Jab, Inc.CanceledDisposal—1,2002,500–3,670Aug 23, 1989
Foster #12DSun Expl. & Prod. Co.-LafayetteCanceledDisposal—1,0002,500–4,000Feb 6, 1978
Keystone Mills #2DSun Expl. & Prod. Co.-LafayetteCanceledDisposal—1,0002,500–4,000Mar 30, 1978
King, R. V. #1Mitchell Energy CorporationCanceledDisposal—1,0003,130–3,950Apr 20, 1993
Wickizer #3 #3Famcor Oil, Inc.CanceledDisposal—1,0002,750–3,150Aug 16, 1999
South Texas Development Co. -A- #A-3Humble Oil & Refining Co.CanceledDisposal—1,0004,930–4,970—
Keystone Mills #4Atlantic Richfield Co.CanceledDisposal—1,0005,010–5,046Nov 16, 1973
Keystone Mills #5Atlantic Richfield Co.CanceledDisposal—1,0005,070–5,076Nov 16, 1973

Latest disposal drilling permits

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

IssuedPermitOperatorLease / well
Aug 22, 2005605177Famcor Oil, IncFoster Campbell SWD #1 33981312
Jan 30, 1987325917Standard Oil Production CompanyFriendswood SWD #1D 33930765
Jan 30, 1987325917Standard Oil Production CompanyFriendswood SWD #1D 33930765

About this data

RRC UIC well master and H-10 injection reports, settled through Sep 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/montgomery, documented in the API reference.