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, 16 of them permitted for disposal, with 1.2 million barrels a day of permitted capacity.
Operators reported 56 million barrels injected on H-10 filings in the twelve months to June 2025, down 16% on the year before, about 13% of what the permits allow.
Highmark Engy Oper, LLC is the largest injector in the county, with 55 million barrels reported across 43 active wells.
- 64
- active injection wells, 16 for disposal
- 1.2M
- bbl/d permitted capacity
- 56.1M
- bbl reported, H-10 year to Jun 2025 -16%
- 13%
- of permitted capacity used
- 252
- UIC permits on file, all time
Reported injection, by month
H-10 FILINGS · TEN YEARS TO JUN 2025
Last 12 months 56,077,555 · prior 12 66,909,970(-16%)
Who injects here
Operators with active permits in the county, by reported H-10 volume over the settled year.
| Operator | Reported, bbl | Active wells | Capacity bbl/d |
|---|---|---|---|
| Highmark Engy Oper, LLC | 54.5M | 43 | 1.11M |
| Daylight Petro LLC | 945K | 9 | 28.3K |
| Wheeler Oper Corp | 589K | 7 | 50K |
| Galloway Lone Star, L.L.C | 2.2K | 1 | 2.5K |
| Galloway Engy Co | 8 | 1 | 700 |
| Hilliard-Bender Energy, LLC | — | 2 | 9K |
| Gaither Petro Corp | — | 1 | 1K |
Injection permits
252 UIC PERMITS · 64 ACTIVE · PAGE 1 OF 3
Active permits first, by reported volume, then cancelled, plugged, and never-activated permits.
| Well | Operator | Status | Purpose | Reported, bbl | bbl/d permitted | Zone, ft | Permitted |
|---|---|---|---|---|---|---|---|
| Conroe Field Unit #310D | Highmark Engy Oper, LLC | Active | Disposal | 5.69M | 25,000 | 2,400–4,020 | Jan 2, 2001 |
| Conroe Field Unit #11D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 4.08M | 25,000 | 2,400–3,655 | Apr 6, 1995 |
| Conroe Field Unit #107D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 3.64M | 25,000 | 2,470–4,200 | Nov 6, 1997 |
| Conroe Field Unit #2123 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.95M | 30,000 | 4,986–5,712 | Oct 28, 2013 |
| Conroe Field Unit #112D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.86M | 25,000 | 2,440–4,422 | Nov 6, 1997 |
| Conroe Field Unit #89 D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.76M | 25,000 | 2,500–4,460 | Apr 6, 1995 |
| Conroe Field Unit #31D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.7M | 25,000 | 2,400–3,890 | Apr 6, 1995 |
| Conroe Field Unit #90D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.7M | 25,000 | 2,590–4,386 | Apr 6, 1995 |
| Conroe Field Unit #2109 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.58M | 25,000 | 4,708–5,400 | Nov 12, 2012 |
| Conroe Field Unit #1114D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.08M | 25,000 | 2,050–3,956 | Apr 6, 1995 |
| Conroe Field Unit #4040D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.08M | 25,000 | 4,770–6,210 | Apr 29, 2008 |
| Conroe Field Unit #2708D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.05M | 25,000 | 2,950–6,500 | Feb 6, 2009 |
| Conroe Field Unit #86D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 2.03M | 25,000 | 2,500–4,074 | Oct 20, 2022 |
| Conroe Field Unit #1636 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.94M | 30,000 | 4,848–5,578 | Oct 29, 2013 |
| Conroe Field Unit #8D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.67M | 25,000 | 2,440–3,077 | Apr 6, 1995 |
| Conroe Field Unit #1528 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.65M | 30,000 | 4,969–5,726 | Oct 31, 2013 |
| Conroe Field Unit #97D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.56M | 25,000 | 2,750–4,000 | Apr 6, 1995 |
| Conroe Field Unit #1920D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.55M | 25,000 | 4,740–5,164 | May 6, 2008 |
| Conroe Field Unit #4038D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.39M | 25,000 | 4,600–6,300 | Jul 10, 2008 |
| Conroe Field Unit #91D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.36M | 25,000 | 2,280–4,533 | Apr 6, 1995 |
| Conroe Field Unit #84 D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.18M | 25,000 | 2,300–4,316 | Nov 18, 2022 |
| Conroe Field Unit #4014D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 1.12M | 25,000 | 2,450–4,050 | Apr 12, 2010 |
| Conroe Field Unit #4170 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 979K | 30,000 | 4,792–5,495 | Oct 28, 2013 |
| Conroe Field Unit #1901D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 786K | 25,000 | 2,450–5,135 | Feb 6, 2009 |
| Hooper, Fannie -A- #5 | Wheeler Oper Corp | Active | Disposal | 538K | 5,000 | 3,070–4,100 | Feb 18, 1977 |
| Conroe Field Unit #2118D | Highmark Engy Oper, LLC | Active | Disposal | 386K | 25,000 | 2,800–4,050 | Aug 14, 2000 |
| Conroe Field Unit #110D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 273K | 25,000 | 2,400–4,200 | Nov 6, 1997 |
| Lake Creek Unit #27 | Daylight Petro LLC | Active | Disposal | 262K | 7,500 | 3,400–3,600 | Sep 23, 2010 |
| Conroe Field Unit #19D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 255K | 25,000 | 2,315–4,100 | Feb 27, 1996 |
| Lake Creek Unit #69 | Daylight Petro LLC | Active | Enhanced recovery | 203K | 1,500 | 9,500–10,300 | Sep 28, 2012 |
| Lake Creek Unit #74 | Daylight Petro LLC | Active | Enhanced recovery | 200K | 1,500 | 9,408–9,462 | Jan 23, 2012 |
| Conroe Field Unit #102D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 154K | 25,000 | 2,400–4,325 | Apr 6, 1995 |
| Bertrand "B" #1 | Daylight Petro LLC | Active | Disposal | 141K | 4,000 | 3,100–3,950 | Jul 18, 2001 |
| Pinehurst Gas Unit #8 | Daylight Petro LLC | Active | Disposal | 139K | 2,000 | 3,300–3,735 | Mar 25, 2024 |
| Conroe Field Unit #18D | Highmark Engy Oper, LLC | Active | Enhanced recovery | 74K | 25,000 | 2,280–4,356 | Apr 6, 1995 |
| Hooper, Fannie -A- #6 | Wheeler Oper Corp | Active | Disposal | 27.6K | 5,000 | 3,100–3,120 | Jun 1, 2011 |
| Conroe Field Unit #4160 | Highmark Engy Oper, LLC | Active | Enhanced recovery | 25.4K | 25,000 | 4,770–5,450 | Oct 5, 2012 |
| Hooper, Fannie -A- #7RE | Wheeler Oper Corp | Active | Enhanced recovery | 23.6K | 12,000 | 3,050–3,510 | Aug 22, 2012 |
| Conroe Field Unit #4112I | Highmark Engy Oper, LLC | Active | Enhanced recovery | 9.35K | 25,000 | 4,840–5,168 | Aug 31, 2021 |
| Magnolia #1 | Galloway Lone Star, L.L.C | Active | Disposal | 2.2K | 2,500 | 4,000–6,000 | Apr 24, 2020 |
| Frost #1 | Galloway Engy Co | Active | Disposal | 8 | 700 | 2,762–2,772 | Oct 16, 2003 |
| Conroe Field Unit #1111 | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 35,000 | 4,630–5,680 | Jan 25, 2018 |
| Conroe Field Unit #10D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,400–3,615 | Apr 6, 1995 |
| Conroe Field Unit #17D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,250–4,750 | Apr 6, 1995 |
| Conroe Field Unit #80 D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,372–3,900 | Apr 6, 1995 |
| Conroe Field Unit #95D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,600–3,707 | Apr 6, 1995 |
| Conroe Field Unit #100D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,250–4,385 | Apr 6, 1995 |
| Conroe Field Unit #104D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,048–4,170 | Apr 6, 1995 |
| Conroe Field Unit #108D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 2,390–3,800 | Nov 16, 1995 |
| Conroe Field Unit #220D | Highmark Engy Oper, LLC | Active | Disposal | — | 25,000 | 2,420–3,900 | Sep 25, 2000 |
| Conroe Field Unit #1910D | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 4,800–5,126 | May 6, 2008 |
| Conroe Field Unit #2112I | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 4,802–5,152 | May 11, 2011 |
| Conroe Field Unit #1607I | Highmark Engy Oper, LLC | Active | Enhanced recovery | — | 25,000 | 4,698–5,183 | May 25, 2011 |
| Dunn "A" #1 | Wheeler Oper Corp | Active | Enhanced recovery | — | 12,000 | 3,000–3,500 | Aug 29, 2013 |
| Hooper, Fannie #3 | Wheeler Oper Corp | Active | Enhanced recovery | — | 10,000 | 3,000–5,150 | Nov 2, 2010 |
| Lake Creek Unit #31D | Daylight Petro LLC | Active | Disposal | — | 7,500 | 3,150–3,900 | Aug 18, 2010 |
| Hooper, Fannie #1 | Wheeler Oper Corp | Active | Enhanced recovery | — | 3,000 | 4,700–5,000 | Nov 14, 2000 |
| Hooper, Fannie #4 | Wheeler Oper Corp | Active | Enhanced recovery | — | 3,000 | 4,750–5,050 | Jan 30, 2007 |
| Pinehurst #2D | Daylight Petro LLC | Active | Disposal | — | 2,800 | 3,200–3,591 | May 17, 2006 |
| Mitchell & Mitchell #1 B | Gaither Petro Corp | Active | Disposal | — | 1,000 | 3,300–3,650 | Jun 14, 1995 |
| Lake Creek Unit #10 | Daylight Petro LLC | Active | Enhanced recovery | — | 1,000 | 7,320–9,166 | Jun 3, 2013 |
| Winslow #1D | Daylight Petro LLC | Active | Disposal | — | 500 | 3,625–3,795 | Jul 28, 1994 |
| Harris, Ida #2 | Hilliard-Bender Energy, LLC | Active | Disposal | — | 5,000 | 2,430–3,150 | Sep 7, 1983 |
| Tyra, Lewis #1 | Hilliard-Bender Energy, LLC | Active | Disposal | — | 4,000 | 3,940–4,300 | Jun 10, 1991 |
| Conroe Field Unit #76D | Highmark Engy Oper, LLC | Plugged | Enhanced recovery | — | 25,000 | 2,800–4,256 | Apr 6, 1995 |
| Conroe Field Unit #45 | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,685–6,080 | Apr 23, 2008 |
| Conroe Field Unit #2122D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,744–6,170 | May 9, 2008 |
| Conroe Field Unit #2121D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,796–6,100 | May 9, 2008 |
| Conroe Field Unit #1632D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,600–6,300 | Jun 24, 2008 |
| Conroe Field Unit #1122D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,600–6,300 | Jun 27, 2008 |
| Conroe Field Unit #2119D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,600–6,300 | Jun 27, 2008 |
| Conroe Field Unit #2120D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,600–6,300 | Jun 27, 2008 |
| Conroe Field Unit #2725D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 4,600–6,300 | Jul 10, 2008 |
| Conroe Field Unit #3627D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 3,000–6,300 | Jan 28, 2009 |
| Conroe Field Unit #3628D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 3,000–6,300 | Jan 28, 2009 |
| Conroe Field Unit #3629D | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 25,000 | 3,000–6,300 | Jan 28, 2009 |
| Conroe Field Unit #4015 | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 24,500 | 2,680–4,950 | Mar 3, 2020 |
| Hooper, Fannie -A- #2W | Wheeler Oper Corp | Inactive | Enhanced recovery | — | 12,000 | 5,150–6,000 | Aug 14, 2009 |
| Mec/Sealy-Smith "G" #1 | Daylight Petro LLC | Cancelled | Disposal | — | 2,500 | 2,800–3,550 | Aug 8, 2001 |
| Conroe Field Unit #96D | Denbury Onshore, LLC | Cancelled | Enhanced recovery | — | 30,000 | 2,000–3,850 | Apr 13, 2015 |
| Conroe Field Unit #1637 | Denbury Onshore, LLC | Cancelled | Enhanced recovery | — | 30,000 | 4,830–5,587 | Oct 21, 2013 |
| Conroe Field Unit #4007 | Highmark Engy Oper, LLC | Inactive | Enhanced recovery | — | 30,000 | 2,800–5,006 | Mar 13, 2020 |
| Conroe Field Unit #1D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 2,040–3,278 | Apr 6, 1995 |
| Conroe Field Unit #5D | Youngblood, C. S. III | Cancelled | Disposal | — | 25,000 | 2,550–3,600 | Feb 26, 1991 |
| Conroe Field Unit #13D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 2,400–3,810 | Apr 6, 1995 |
| Conroe Field Unit #26D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 2,500–3,925 | Apr 6, 1995 |
| Conroe Field Unit #37D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 3,030–3,300 | Apr 6, 1995 |
| Conroe Field Unit #38D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,900–3,800 | Apr 6, 1995 |
| Conroe Field Unit #39D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,500–3,300 | Sep 15, 1997 |
| Conroe Field Unit #64D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 2,440–4,650 | Apr 6, 1995 |
| Conroe Field Unit #65D | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 25,000 | 2,400–4,000 | Apr 6, 1995 |
| Conroe Field Unit #67D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,400–3,940 | Apr 6, 1995 |
| Conroe Field Unit #70D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,400–3,940 | Apr 6, 1995 |
| Conroe Field Unit #74D | Denbury Onshore, LLC | Plugged | Enhanced recovery | — | 25,000 | 4,722–5,134 | Sep 6, 2011 |
| Conroe Field Unit #75D | Denbury Onshore, LLC | Plugged | Enhanced recovery | — | 25,000 | 2,370–4,443 | Apr 6, 1995 |
| Conroe Field Unit #78D | Denbury Onshore, LLC | Plugged | Enhanced recovery | — | 25,000 | 2,415–4,015 | Apr 6, 1995 |
| Conroe Field Unit #79D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,430–4,316 | Apr 6, 1995 |
| Conroe Field Unit #82D | Denbury Onshore, LLC | Cancelled | Enhanced recovery | — | 25,000 | 2,495–4,406 | Apr 6, 1995 |
| Conroe Field Unit #77D | Exxon Mobil Corp | Cancelled | Enhanced recovery | — | 25,000 | 2,800–4,260 | Apr 6, 1995 |
| Conroe Field Unit #88D | Denbury Onshore, LLC | Cancelled | Enhanced recovery | — | 25,000 | 2,500–4,104 | Apr 6, 1995 |
Latest disposal drilling permits
W-1 drilling permits in the county tagged as produced-water disposal.
| Issued | Permit | Operator | Lease / well |
|---|---|---|---|
| Aug 22, 2005 | 605177 | Famcor Oil, Inc | Foster Campbell SWD #1 33981312 |
| Jan 30, 1987 | 325917 | Standard Oil Production Company | Friendswood SWD #1D 33930765 |
| Jan 30, 1987 | 325917 | Standard Oil Production Company | Friendswood SWD #1D 33930765 |
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/montgomery, documented in the API reference.