Produced water and disposal in Zavala 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 →
Zavala County has 23 active injection and disposal wells, 3 of them permitted for disposal, with 52,105 barrels a day of permitted capacity.
Operators reported 629,720 barrels injected on H-10 filings in the twelve months to June 2025, up 13% on the year before, about 3% of what the permits allow.
Buffco Prod Inc is the largest injector in the county, with 206,048 barrels reported across 2 active wells.
TexNet located 14 M2+ earthquakes in the county's area over the last two years, the largest M3.5.
- 23
- active injection wells, 3 for disposal
- 52.1K
- bbl/d permitted capacity
- 630K
- bbl reported, H-10 year to Jun 2025 +13%
- 3%
- of permitted capacity used
- 118
- UIC permits on file, all time
Reported injection, by month
H-10 FILINGS · TEN YEARS TO JUN 2025
Last 12 months 629,720 · prior 12 556,211(+13%)
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 |
|---|---|---|---|
| Buffco Prod Inc | 206K | 2 | 20K |
| CML Expl, LLC | 172K | 1 | 2.5K |
| Rickaway Engy, Corp | 102K | 3 | 2.99K |
| Rio-Tex, Inc | 91.2K | 1 | 0 |
| White Marlin Oper Co, LLC | 30.2K | 1 | 1.6K |
| McDay Engy Corp | 9.95K | 8 | 2.32K |
| Flint Oak Engy, LLC | 9.87K | 2 | 4K |
| Arrco Operating, LLC | 7.89K | 1 | 500 |
| Texxco Energy Services Inc | — | 1 | 15K |
| Trinity Oper (Usg), LLC | — | 1 | 2.2K |
| Silver Rock Energy, LLC | — | 2 | 1K |
Injection permits
118 UIC PERMITS · 23 ACTIVE · PAGE 2 OF 2
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 |
|---|---|---|---|---|---|---|---|
| Holdsworth -A- #2605 | Cornerstone Oil & Gas, Inc. | Cancelled | Enhanced recovery | — | 200 | 3,784–3,832 | May 22, 1967 |
| Zavala #2 | Botasch Oper, LLC | Cancelled | Enhanced recovery | — | 200 | 4,347–4,360 | Oct 31, 1995 |
| Bracero Transportation Co., Inc. #7 | Stroube Engy Corp | Cancelled | Enhanced recovery | — | 150 | 3,898–3,932 | May 31, 1967 |
| Paysinger, W. H. #1 | Bridger Oil Inc | Cancelled | Enhanced recovery | — | 150 | 3,874–3,879 | Nov 15, 1973 |
| Bartlett #1 | Uvalde Engy Co | Cancelled | Disposal | — | 150 | 2,650–2,683 | Apr 23, 1984 |
| Stuart "B" #2 | Remuda Oper Co | Cancelled | Disposal | — | 144 | 3,000–2,900 | Nov 24, 1975 |
| Brice, Mary M. -B- #4 | Jennings Expl Co | Cancelled | Enhanced recovery | — | 100 | 4,494–4,520 | Jun 21, 1984 |
| LA Mantia #1 | Jennings Expl Co | Cancelled | Enhanced recovery | — | 100 | 3,682–3,695 | Jun 26, 1980 |
| Cassin, S. S. #2 | Killam Oil Co | Cancelled | Other | — | 25 | 3,404–3,411 | Oct 10, 1969 |
| Kinast, Frank X. #4WD | Egan Res Inc | Cancelled | Other | — | — | 4,402 | — |
| Big Wells /San Miguel/ Unit #57 | Sun Expl. & Prod. Co.-Houston | Cancelled | Enhanced recovery | — | — | 5,360–5,381 | Sep 19, 1977 |
| Bracero Transportation Co., Inc. #3 L | Stroube Engy Corp | Cancelled | Other | — | — | — | — |
| Holdsworth, E. M., -A- #261 | KWH Oil Co | Cancelled | Other | — | — | — | — |
| Big Wells (San Miguel) Unit #51 | Sun Expl. & Prod. Co.-Houston | Cancelled | Enhanced recovery | — | — | 5,354–5,360 | Sep 19, 1977 |
| Northeastern Farming Co. #1 | Texaco Inc | Cancelled | Other | — | — | 3,300 | — |
| Kiefer, Chester #6 | Quatro Oil and Gas, Inc | Cancelled | Enhanced recovery | — | — | 736–746 | Nov 13, 1991 |
| Felps #1H | Rio-Tex, Inc | Cancelled | Enhanced recovery | — | — | 7,350–8,217 | Jul 7, 2010 |
| Matthews, Ned #9 | Hanover Petro Corp | Plugged | Enhanced recovery | — | — | 2,670–2,819 | Jan 2, 1975 |
Latest disposal drilling permits
W-1 drilling permits in the county tagged as produced-water disposal.
| Issued | Permit | Operator | Lease / well |
|---|---|---|---|
| Sep 13, 2022 | 883841 | Buffco Production Inc. | Howett SWD #1 50733481 |
| Dec 5, 2014 | 801285 | Exco Operating Company, LP | KM South Zav SWD #1 50733219 |
| Oct 26, 2013 | 771690 | Pyote Well Service, LLC | Crystal City SWD #1A 50733064 |
| Oct 22, 2013 | 771558 | Pyote Well Service, LLC | Crystal City SWD #1B 50733063 |
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/zavala, documented in the API reference.