Saltwater Disposal Wells in Montgomery County
Complete UIC injection & disposal well inventory from RRC permits, with reported H-10 volumes.
Active Wells
64
Permitted Capacity
1.2M bbl/d
Injected 12mo (thru 2025-06)
56.1M bbl
UIC Permits All Time
252
| STATUS | LEASE / WELL | API | OPERATOR | TYPE | PERMITTED BBL/D | INJECTED 12MO | ZONE (FT) |
|---|---|---|---|---|---|---|---|
| Active | CONROE FIELD UNIT #310D | 42-339-30407 | HIGHMARK ENGY OPER, LLC | Disposal | 25,000 | 5.7M | 2,400–4,020 |
| Active | CONROE FIELD UNIT #11D | 42-339-30021 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 4.1M | 2,400–3,655 |
| Active | CONROE FIELD UNIT #107D | 42-339-30439 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 3.6M | 2,470–4,200 |
| Active | CONROE FIELD UNIT #2123 | 42-339-31109 | HIGHMARK ENGY OPER, LLC | Injection | 30,000 | 2.9M | 4,986–5,712 |
| Active | CONROE FIELD UNIT #112D | 42-339-00459 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.9M | 2,440–4,422 |
| Active | CONROE FIELD UNIT #89 D | 42-339-00387 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.8M | 2,500–4,460 |
| Active | CONROE FIELD UNIT #31D | 42-339-00364 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.7M | 2,400–3,890 |
| Active | CONROE FIELD UNIT #90D | 42-339-01466 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.7M | 2,590–4,386 |
| Active | CONROE FIELD UNIT #2109 | 42-339-01511 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.6M | 4,708–5,400 |
| Active | CONROE FIELD UNIT #1114D | 42-339-00780 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.1M | 2,050–3,956 |
| Active | CONROE FIELD UNIT #4040D | 42-339-30414 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.1M | 4,770–6,210 |
| Active | CONROE FIELD UNIT #2708D | 42-339-00568 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.1M | 2,950–6,500 |
| Active | CONROE FIELD UNIT #86D | 42-339-00626 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 2.0M | 2,500–4,074 |
| Active | CONROE FIELD UNIT #1636 | 42-339-31116 | HIGHMARK ENGY OPER, LLC | Injection | 30,000 | 1.9M | 4,848–5,578 |
| Active | CONROE FIELD UNIT #8D | 42-339-00684 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.7M | 2,440–3,077 |
| Active | CONROE FIELD UNIT #1528 | 42-339-31117 | HIGHMARK ENGY OPER, LLC | Injection | 30,000 | 1.6M | 4,969–5,726 |
| Active | CONROE FIELD UNIT #97D | 42-339-30719 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.6M | 2,750–4,000 |
| Active | CONROE FIELD UNIT #1920D | 42-339-01481 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.6M | 4,740–5,164 |
| Active | CONROE FIELD UNIT #4038D | 42-339-31091 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.4M | 4,600–6,300 |
| Active | CONROE FIELD UNIT #91D | 42-339-00473 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.4M | 2,280–4,533 |
| Active | CONROE FIELD UNIT #84 D | 42-339-00613 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.2M | 2,300–4,316 |
| Active | CONROE FIELD UNIT #4014D | 42-339-30107 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 1.1M | 2,450–4,050 |
| Active | CONROE FIELD UNIT #4170 | 42-339-31114 | HIGHMARK ENGY OPER, LLC | Injection | 30,000 | 979,091 | 4,792–5,495 |
| Active | CONROE FIELD UNIT #1901D | 42-339-01319 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 785,778 | 2,450–5,135 |
| Active | HOOPER, FANNIE -A- #5 | 42-339-00279 | WHEELER OPER CORP | Disposal | 5,000 | 537,500 | 3,070–4,100 |
| Active | CONROE FIELD UNIT #2118D | 42-339-30690 | HIGHMARK ENGY OPER, LLC | Disposal | 25,000 | 386,245 | 2,800–4,050 |
| Active | CONROE FIELD UNIT #110D | 42-339-30512 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 273,366 | 2,400–4,200 |
| Active | LAKE CREEK UNIT #27 | 42-339-01089 | DAYLIGHT PETRO LLC | Disposal | 7,500 | 261,846 | 3,400–3,600 |
| Active | CONROE FIELD UNIT #19D | 42-339-01459 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 254,723 | 2,315–4,100 |
| Active | LAKE CREEK UNIT #69 | 42-339-30938 | DAYLIGHT PETRO LLC | Injection | 1,500 | 203,205 | 9,500–10,300 |
| Active | LAKE CREEK UNIT #74 | 42-339-30952 | DAYLIGHT PETRO LLC | Injection | 1,500 | 199,900 | 9,408–9,462 |
| Active | CONROE FIELD UNIT #102D | 42-339-01290 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 154,437 | 2,400–4,325 |
| Active | BERTRAND "B" #1 | 42-339-30966 | DAYLIGHT PETRO LLC | Disposal | 4,000 | 140,504 | 3,100–3,950 |
| Active | PINEHURST GAS UNIT #8 | 42-339-30858 | DAYLIGHT PETRO LLC | Disposal | 2,000 | 139,057 | 3,300–3,735 |
| Active | CONROE FIELD UNIT #18D | 42-339-00460 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 73,964 | 2,280–4,356 |
| Active | HOOPER, FANNIE -A- #6 | 42-339-00280 | WHEELER OPER CORP | Disposal | 5,000 | 27,600 | 3,100–3,120 |
| Active | CONROE FIELD UNIT #4160 | 42-339-30473 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 25,378 | 4,770–5,450 |
| Active | HOOPER, FANNIE -A- #7RE | 42-339-00281 | WHEELER OPER CORP | Injection | 12,000 | 23,625 | 3,050–3,510 |
| Active | CONROE FIELD UNIT #4112I | 42-339-01526 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | 9,345 | 4,840–5,168 |
| Active | MAGNOLIA #1 | 42-339-31055 | GALLOWAY LONE STAR, L.L.C | Disposal | 2,500 | 2,200 | 4,000–6,000 |
| Active | FROST #1 | 42-339-30679 | GALLOWAY ENGY CO | Disposal | 700 | 8 | 2,762–2,772 |
| Active | CONROE FIELD UNIT #1111 | 42-339-00608 | HIGHMARK ENGY OPER, LLC | Injection | 35,000 | -- | 4,630–5,680 |
| Active | CONROE FIELD UNIT #104D | 42-339-30572 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,048–4,170 |
| Active | CONROE FIELD UNIT #1607I | 42-339-01463 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,698–5,183 |
| Active | CONROE FIELD UNIT #2112I | 42-339-01522 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,802–5,152 |
| Active | CONROE FIELD UNIT #100D | 42-339-01512 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,250–4,385 |
| Active | CONROE FIELD UNIT #1910D | 42-339-01470 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,800–5,126 |
| Active | CONROE FIELD UNIT #17D | 42-339-01508 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,250–4,750 |
| Active | CONROE FIELD UNIT #95D | 42-339-30618 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,600–3,707 |
| Active | CONROE FIELD UNIT #80 D | 42-339-00599 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,372–3,900 |
| Active | CONROE FIELD UNIT #220D | 42-339-30616 | HIGHMARK ENGY OPER, LLC | Disposal | 25,000 | -- | 2,420–3,900 |
| Active | CONROE FIELD UNIT #108D | 42-339-30586 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,390–3,800 |
| Active | CONROE FIELD UNIT #10D | 42-339-00602 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,400–3,615 |
| Active | DUNN "A" #1 | 42-339-00294 | WHEELER OPER CORP | Injection | 12,000 | -- | 3,000–3,500 |
| Active | HOOPER, FANNIE #3 | 42-339-00558 | WHEELER OPER CORP | Injection | 10,000 | -- | 3,000–5,150 |
| Active | LAKE CREEK UNIT #31D | 42-339-30946 | DAYLIGHT PETRO LLC | Disposal | 7,500 | -- | 3,150–3,900 |
| Active | HOOPER, FANNIE #4 | 42-339-00559 | WHEELER OPER CORP | Injection | 3,000 | -- | 4,750–5,050 |
| Active | HOOPER, FANNIE #1 | 42-339-00556 | WHEELER OPER CORP | Injection | 3,000 | -- | 4,700–5,000 |
| Active | PINEHURST #2D | 42-339-01057 | DAYLIGHT PETRO LLC | Disposal | 2,800 | -- | 3,200–3,591 |
| Active | MITCHELL & MITCHELL #1 B | 42-339-30701 | GAITHER PETRO CORP | Disposal | 1,000 | -- | 3,300–3,650 |
| Active | LAKE CREEK UNIT #10 | 42-339-01027 | DAYLIGHT PETRO LLC | Injection | 1,000 | -- | 7,320–9,166 |
| Active | WINSLOW #1D | 42-339-01041 | DAYLIGHT PETRO LLC | Disposal | 500 | -- | 3,625–3,795 |
| Active | HARRIS, IDA #2 | 42-339-30605 | HILLIARD-BENDER ENERGY, LLC | Disposal | 5,000 | -- | 2,430–3,150 |
| Active | TYRA, LEWIS #1 | 42-339-30760 | HILLIARD-BENDER ENERGY, LLC | Disposal | 4,000 | -- | 3,940–4,300 |
| Inactive | CONROE FIELD UNIT #1122D | 42-339-31085 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Inactive | CONROE FIELD UNIT #2119D | 42-339-31087 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Plugged | CONROE FIELD UNIT #76D | 42-339-01288 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,800–4,256 |
| Inactive | CONROE FIELD UNIT #2120D | 42-339-31092 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Inactive | CONROE FIELD UNIT #1632D | 42-339-31086 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Inactive | CONROE FIELD UNIT #2122D | 42-339-31013 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,744–6,170 |
| Inactive | CONROE FIELD UNIT #2121D | 42-339-30662 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,796–6,100 |
| Inactive | CONROE FIELD UNIT #45 | 42-339-00480 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,685–6,080 |
| Inactive | CONROE FIELD UNIT #3629D | 42-339-00000 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 3,000–6,300 |
| Inactive | CONROE FIELD UNIT #3627D | 42-339-00000 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 3,000–6,300 |
| Inactive | CONROE FIELD UNIT #2725D | 42-339-31090 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Inactive | CONROE FIELD UNIT #3628D | 42-339-00000 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 3,000–6,300 |
| Inactive | CONROE FIELD UNIT #4015 | 42-339-30136 | HIGHMARK ENGY OPER, LLC | Injection | 24,500 | -- | 2,680–4,950 |
| Inactive | HOOPER, FANNIE -A- #2W | 42-339-00276 | WHEELER OPER CORP | Injection | 12,000 | -- | 5,150–6,000 |
| Plugged | MEC/SEALY-SMITH "G" #1 | 42-339-30995 | DAYLIGHT PETRO LLC | Disposal | 2,500 | -- | 2,800–3,550 |
| Plugged | CONROE FIELD UNIT #96D | 42-339-30668 | DENBURY ONSHORE, LLC | Injection | 30,000 | -- | 2,000–3,850 |
| Inactive | CONROE FIELD UNIT #4007 | 42-339-01292 | HIGHMARK ENGY OPER, LLC | Injection | 30,000 | -- | 2,800–5,006 |
| Cancelled | CONROE FIELD UNIT #1637 | 42-339-31115 | DENBURY ONSHORE, LLC | Injection | 30,000 | -- | 4,830–5,587 |
| Plugged | CONROE FIELD UNIT #1D | 42-339-00590 | YOUNGBLOOD, C. S. III | Injection | 25,000 | -- | 2,040–3,278 |
| Plugged | CONROE FIELD UNIT #79D | 42-339-00618 | EXXON MOBIL CORP | Injection | 25,000 | -- | 2,430–4,316 |
| Plugged | CONROE FIELD UNIT #78D | 42-339-00464 | DENBURY ONSHORE, LLC | Injection | 25,000 | -- | 2,415–4,015 |
| Plugged | CONROE FIELD UNIT #26D | 42-339-30164 | YOUNGBLOOD, C. S. III | Injection | 25,000 | -- | 2,500–3,925 |
| Plugged | CONROE FIELD UNIT #75D | 42-339-00467 | DENBURY ONSHORE, LLC | Injection | 25,000 | -- | 2,370–4,443 |
| Plugged | CONROE FIELD UNIT #74D | 42-339-01456 | DENBURY ONSHORE, LLC | Injection | 25,000 | -- | 4,722–5,134 |
| Inactive | MOORE, H. N. #46 | 42-339-01489 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,732–5,180 |
| Inactive | CONROE FIELD UNIT #519D | 42-339-31088 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Plugged | CONROE FIELD UNIT #70D | 42-339-01274 | EXXON MOBIL CORP | Injection | 25,000 | -- | 2,400–3,940 |
| Plugged | CONROE FIELD UNIT #67D | 42-339-01380 | EXXON MOBIL CORP | Injection | 25,000 | -- | 2,400–3,940 |
| Inactive | KEYSTONE MILLS #40 | 42-339-30608 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,600–6,300 |
| Inactive | CONROE FIELD UNIT #1617 | 42-339-01484 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 4,662–5,128 |
| Plugged | CONROE FIELD UNIT #65D | 42-339-01246 | YOUNGBLOOD, C. S. III | Injection | 25,000 | -- | 2,400–4,000 |
| Inactive | CONROE FIELD UNIT #98D | 42-339-30647 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,400–4,100 |
| Plugged | CONROE FIELD UNIT #64D | 42-339-00763 | YOUNGBLOOD, C. S. III | Injection | 25,000 | -- | 2,440–4,650 |
| Inactive | CONROE FIELD UNIT #105D | 42-339-30567 | HIGHMARK ENGY OPER, LLC | Injection | 25,000 | -- | 2,400–4,020 |
| Plugged | CONROE FIELD UNIT #5D | 42-339-00274 | YOUNGBLOOD, C. S. III | Disposal | 25,000 | -- | 2,550–3,600 |
| Plugged | CONROE FIELD UNIT #77D | 42-339-01293 | EXXON MOBIL CORP | Injection | 25,000 | -- | 2,800–4,260 |
page 1 of 3 · 252 wells
Source: RRC UIC well master and H-10 injection filings. H-10s are annual filings on staggered anniversaries — injected volumes shown through 2025-06, the newest month with complete reporting; recent months are never estimated.