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 1 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 |
|---|---|---|---|---|---|---|---|
| Cornett #1 | CML Expl, LLC | Active | Enhanced recovery | 172K | 2,500 | 3,785–4,853 | Nov 7, 2018 |
| Texron - Howett #5 | Buffco Prod Inc | Active | Disposal | 111K | 10,000 | 4,140–4,335 | Feb 9, 2024 |
| Spinach Elaine Unit #B 1DM | Rickaway Engy, Corp | Active | Enhanced recovery | 102K | 1,120 | 3,972–3,982 | Jan 16, 2009 |
| Howett #18SW | Buffco Prod Inc | Active | Disposal | 95K | 10,000 | 4,186–4,390 | Nov 20, 2020 |
| Felps #1H | Rio-Tex, Inc | Active | Enhanced recovery | 91.2K | — | 7,350–8,217 | Jul 7, 2010 |
| Elaine (5100) Unit #51 | White Marlin Oper Co, LLC | Active | Enhanced recovery | 30.2K | 1,600 | 5,162–5,183 | Mar 7, 2016 |
| Baggett, Jeff #221 | Flint Oak Engy, LLC | Active | Enhanced recovery | 9.87K | 2,500 | 6,483–7,000 | Jun 1, 2009 |
| Hammond, Ada E. -A- #2 | Arrco Operating, LLC | Active | Enhanced recovery | 7.89K | 500 | 2,981–3,018 | Aug 30, 2000 |
| Pryor Ranch #116 | McDay Engy Corp | Active | Enhanced recovery | 2.04K | 70 | 2,980–2,984 | Feb 28, 1984 |
| Pryor Ranch #170 | McDay Engy Corp | Active | Enhanced recovery | 1.92K | 100 | 2,736–2,744 | Feb 28, 1984 |
| Pryor Ranch #137 | McDay Engy Corp | Active | Enhanced recovery | 1.91K | 200 | 3,074–3,082 | Jun 17, 1988 |
| H&F Properties "E-I" #1 | McDay Engy Corp | Active | Enhanced recovery | 1.62K | 500 | 3,674–3,691 | Dec 10, 1992 |
| Pryor Ranch #1A | McDay Engy Corp | Active | Enhanced recovery | 1.25K | 600 | 2,352–2,355 | Jun 9, 1988 |
| Pryor Ranch #8 | McDay Engy Corp | Active | Enhanced recovery | 1.21K | 100 | 2,636–2,642 | Jan 20, 1987 |
| Glasscock, Leta #1D | Trinity Oper (Usg), LLC | Active | Enhanced recovery | — | 2,200 | 4,432–4,667 | Nov 22, 1991 |
| Big Wells /San Miguel/ Unit #608 | Flint Oak Engy, LLC | Active | Enhanced recovery | — | 1,500 | 5,460–5,560 | Oct 8, 1986 |
| Spinach (Elaine) Unit #1 | Rickaway Engy, Corp | Active | Enhanced recovery | — | 1,120 | 3,774–3,801 | Jan 16, 2009 |
| Spinach Elaine Unit #E 1 | Rickaway Engy, Corp | Active | Enhanced recovery | — | 745 | 3,918–3,936 | Jan 5, 2009 |
| Pryor Ranch #73 | McDay Engy Corp | Active | Enhanced recovery | — | 150 | 2,948–2,956 | Oct 20, 1987 |
| Dual Zone #1 | Texxco Energy Services Inc | Active | Disposal | — | 15,000 | 7,016–7,330 | Jan 20, 2012 |
| Pryor Ranch #35 | McDay Engy Corp | Active | Enhanced recovery | — | 600 | 2,968–2,978 | Jun 9, 1988 |
| Ware, Alpha #108 | Silver Rock Energy, LLC | Active | Enhanced recovery | — | 500 | 3,000–3,240 | Aug 18, 1969 |
| Ware, Alpha #203 | Silver Rock Energy, LLC | Active | Enhanced recovery | — | 500 | 3,020–3,038 | Oct 7, 2009 |
| Chittim Heirs #12H | Blackbrush O & G, LLC | Inactive | Enhanced recovery | — | 4,000 | 5,050–5,135 | Mar 13, 2023 |
| TE Crystal City SWD #1A | Rock Island H2O Management, LLC | Cancelled | Enhanced recovery | — | 25,000 | 2,450–3,400 | Dec 5, 2014 |
| TE Crystal City SWD #1B | Rock Island H2O Management, LLC | Cancelled | Disposal | — | 25,000 | 7,100–8,600 | Dec 4, 2014 |
| Zavala SWD #1 | BD Oper, LLC | Cancelled | Disposal | — | 25,000 | 6,500–9,500 | May 8, 2017 |
| FM 1025 SWD #2 | Tiburon Res, Inc | Cancelled | Disposal | — | 20,000 | 6,500–8,900 | Oct 25, 2011 |
| FM 1025 SWD #1 | Tiburon Res, Inc | Cancelled | Disposal | — | 20,000 | 6,500–8,900 | Oct 25, 2011 |
| KM South Zav SWD #1 | Exco Oper Co, LP | Cancelled | Disposal | — | 20,000 | 6,633–9,222 | Jun 26, 2018 |
| James L. Mathews #1 | Bruno, Earl R | Cancelled | Other | — | 12,000 | 2,822–2,826 | Sep 11, 1964 |
| Howett SWD #1 | Buffco Prod Inc | Cancelled | Disposal | — | 10,000 | 4,198–4,230 | Jun 12, 2020 |
| Matthews Ranch #2PC | Texas Eastern Developments, Inc | Cancelled | Enhanced recovery | — | 4,100 | 2,850 | Apr 20, 1982 |
| Elaine (5100) Unit #92 | American Expl Co | Cancelled | Enhanced recovery | — | 4,000 | 5,290–5,305 | Jul 30, 1985 |
| Earnest, W. A. #295 | Cibolo Engy Oper, Inc | Cancelled | Disposal | — | 4,000 | 4,550–4,700 | Jan 9, 1998 |
| Chittim Heirs #11H | Blackbrush O & G, LLC | Inactive | Enhanced recovery | — | 4,000 | 5,150–5,190 | Oct 20, 2022 |
| Jones, E. B. #2D | Texas American Res Co | Plugged | Disposal | — | 3,000 | 4,635–4,901 | Mar 28, 1991 |
| Garner, John N. #7 | Omni Oper Co(a) | Cancelled | Disposal | — | 3,000 | 4,670–4,850 | Jul 2, 1990 |
| Lupe, John B. -B- #6 | Bluestar Engy, Inc | Cancelled | Disposal | — | 3,000 | 4,690–4,860 | Aug 14, 1990 |
| Thompson #421 | Parkway Petro, Inc | Plugged | Disposal | — | 3,000 | 4,760–4,950 | Sep 19, 1990 |
| Jones, E.B. -C- #1 | Texas American Res Co | Plugged | Disposal | — | 3,000 | 4,508–4,750 | Aug 17, 1990 |
| Vaughn #6 | Nucorp Engy, Inc | Plugged | Enhanced recovery | — | 3,000 | 1,950 | Nov 18, 1981 |
| Pickens-Coffield #8 | Nucorp Engy, Inc | Plugged | Enhanced recovery | — | 3,000 | 1,950 | Sep 28, 1981 |
| Raine #5 | Bridger Oil Inc | Plugged | Disposal | — | 2,500 | 2,796–2,818 | May 15, 1990 |
| Jonsson-Perlitz "A" #5 | Comanche Crude Oil Co. | Cancelled | Enhanced recovery | — | 2,500 | 2,330–2,660 | Jan 31, 1994 |
| Pickens-Coffield #1 | Enre Corp | Cancelled | Disposal | — | 2,000 | 1,283–1,590 | Jul 2, 1981 |
| Northeastern Farming Company #1 | Camino Agave, Inc | Cancelled | Enhanced recovery | — | 2,000 | 3,000–3,500 | Mar 25, 1991 |
| Northeastern Farming Co. #2 | Camino Agave, Inc | Cancelled | Enhanced recovery | — | 2,000 | 3,000–3,500 | Jun 22, 2001 |
| Willoughby, R.B. #3 | Frio SWD, Inc. | Cancelled | Disposal | — | 1,800 | 2,825–2,843 | May 26, 1988 |
| Spinach Elaine Unit #4 | Placid Oil Co | Cancelled | Enhanced recovery | — | 1,250 | 4,056–4,080 | Apr 18, 1988 |
| Watkins, Ross C. #1 | Gulf Oil Corp | Plugged | Enhanced recovery | — | 1,250 | 310–375 | Nov 19, 1974 |
| Kleimann, R. J. #2 | Placid Oil Co | Cancelled | Enhanced recovery | — | 1,125 | 3,786–3,810 | Sep 12, 1984 |
| Spinach Elaine Unit #B 1M | Placid Oil Co | Cancelled | Enhanced recovery | — | 1,125 | 3,774–3,788 | Sep 12, 1984 |
| Kleimann, R.J. -B- #1 | Placid Oil Co | Cancelled | Enhanced recovery | — | 1,125 | 3,774–3,788 | Sep 12, 1984 |
| Big Wells /San Miguel/ Unit #701 | Sanchez-O'Brien Oil & Gas Corp | Cancelled | Enhanced recovery | — | 1,000 | 5,429–5,453 | Oct 29, 1993 |
| Big Wells /San Miguel/ Unit #707 | Trinity Oper (Usg), LLC | Plugged | Enhanced recovery | — | 1,000 | 5,383–5,410 | Oct 29, 1993 |
| Big Wells /San Miguel/ Unit #802 | Kerr-McGee Oil & Gas Onshore LLC | Cancelled | Enhanced recovery | — | 1,000 | 5,460–5,487 | Oct 29, 1993 |
| Kinast, Frank X. #1 | Jenex Petro Corp | Plugged | Enhanced recovery | — | 1,000 | 4,367–4,372 | Nov 17, 1992 |
| Paysinger, W. H. #2 | Bridger Oil Inc | Plugged | Enhanced recovery | — | 1,000 | 3,348–3,352 | Mar 1, 2006 |
| Earnest, W. A. -A- #3005 | Citation Oil & Gas Corp | Inactive | Disposal | — | 800 | 4,550–4,700 | Aug 6, 1990 |
| Lyles, G. W. #2 | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 750 | 544–580 | Jun 3, 1974 |
| Lyles, G. W. #4 | Youngblood, C. S. III | Cancelled | Enhanced recovery | — | 750 | 528–529 | Sep 26, 1974 |
| Big Wells /San Miguel/ Unit #803 | Sanchez-O'Brien Oil & Gas Corp | Cancelled | Enhanced recovery | — | 700 | 5,484–5,509 | Dec 3, 1984 |
| Holdsworth, Mary -B- #7D | Pearl, Bill H. Productions, Inc | Cancelled | Disposal | — | 700 | 4,290–4,350 | Nov 18, 1986 |
| Ware, Alpha #1015 | Forest Oil Corp | Cancelled | Enhanced recovery | — | 700 | 2,975–3,000 | Feb 22, 1971 |
| Pryor Ranch #157 | McDay Engy Corp | Plugged | Enhanced recovery | — | 600 | 2,522–2,548 | Nov 30, 1989 |
| Pryor Ranch #72 | McDay Engy Corp | Inactive | Enhanced recovery | — | 600 | 2,953–2,969 | Mar 16, 2004 |
| Pryor Ranch #92 | McDay Engy Corp | Inactive | Enhanced recovery | — | 600 | 2,966–2,975 | Mar 16, 2004 |
| Pryor Ranch #94 | McDay Engy Corp | Inactive | Enhanced recovery | — | 600 | 2,918–2,924 | Mar 16, 2004 |
| Ware, Alpha #101 | Koven Prod Co | Cancelled | Enhanced recovery | — | 500 | 3,007–3,035 | Aug 18, 1969 |
| Ware, Alpha #204 | Spur Oper Co | Cancelled | Enhanced recovery | — | 500 | 3,050–3,055 | Aug 18, 1969 |
| Ware, Alpha #205 | Spur Oper Co | Cancelled | Enhanced recovery | — | 500 | 3,076–3,086 | Aug 18, 1969 |
| Ware, Alpha #1014 | Spur Oper Co | Plugged | Enhanced recovery | — | 500 | 3,050–3,088 | Aug 18, 1969 |
| Ware, Alpha #1017 | Koven Prod Co | Cancelled | Enhanced recovery | — | 500 | 3,026–3,050 | May 10, 1973 |
| Ware, Alpha #1018 | Spur Oper Co | Cancelled | Enhanced recovery | — | 500 | 30,263–50 | May 10, 1973 |
| Holdsworth, Mary #2 | Pearl, Bill H. Productions, Inc | Cancelled | Enhanced recovery | — | 500 | 4,122–4,145 | Oct 10, 1980 |
| Weaver #A 6D | Weaver, Bruce D. Sr. | Cancelled | Disposal | — | 500 | 4,050–4,400 | Sep 21, 1984 |
| Kinast, Frank X. #3 | Diamond Energy Services, LP | Inactive | Enhanced recovery | — | 500 | 4,355–4,370 | Jun 3, 1992 |
| Bracero Transportation Co., Inc. #5 | Finley Res, Inc | Plugged | Enhanced recovery | — | 500 | 3,614–3,647 | Aug 6, 1999 |
| Witherspoon -A- #6 | Witherspoon Oil Company | Plugged | Enhanced recovery | — | 500 | 2,660–2,710 | Nov 27, 2000 |
| Ware, Alpha #1013 | Forest Oil Corp | Plugged | Enhanced recovery | — | 500 | 3,000–3,051 | May 28, 1970 |
| Palm Enterprise, Inc. #3162 | Little Oil & Gas, Inc | Cancelled | Disposal | — | 400 | 3,928–3,936 | May 3, 1978 |
| Holdsworth, E.M. #1D | Pearl, Bill H. Productions, Inc | Cancelled | Disposal | — | 400 | 2,900–4,400 | Jul 11, 1983 |
| Van Cleve, D.F. #4 | Cuatro Petro Corp | Plugged | Enhanced recovery | — | 400 | 2,630–2,720 | Feb 1, 1988 |
| Weber, L.G. #2 | Picosa, L.L.C. | Cancelled | Enhanced recovery | — | 400 | 2,762–2,782 | Jun 10, 1997 |
| Weber, L.G. #3 | Picosa, L.L.C. | Cancelled | Enhanced recovery | — | 400 | 2,754–2,780 | Jun 10, 1997 |
| Krawetz #2 | Barnett Engy, Inc | Cancelled | Enhanced recovery | — | 400 | 5,750–8,949 | Jan 9, 2001 |
| Bracero Transportation Co., Inc. #2 | Stroube Engy Corp | Cancelled | Enhanced recovery | — | 300 | 3,761–3,774 | Jun 9, 1987 |
| Holdsworth, E. M., -A- #3 | Quatro Oil and Gas, Inc | Cancelled | Enhanced recovery | — | 300 | 3,816–3,834 | Sep 1, 1970 |
| Holdsworth, E. M., -A- #267 | Quatro Oil and Gas, Inc | Cancelled | Enhanced recovery | — | 300 | 3,782–3,824 | Aug 31, 1970 |
| Encino Viejo Ranch #7D | Hughes Texas Petro, Ltd | Cancelled | Disposal | — | 300 | 3,808–3,810 | Sep 27, 1977 |
| Van Cleve, Jack "B" #3W | Hampton Energy Corporation | Cancelled | Enhanced recovery | — | 300 | 2,806–2,822 | Dec 28, 1981 |
| H&F Properties -E- #9 | Diversified O&G Prod. Co., Inc. | Plugged | Enhanced recovery | — | 300 | 3,714–3,734 | Aug 17, 1983 |
| Little, J. P. #2 L | Joint Res Co | Cancelled | Enhanced recovery | — | 300 | 3,698–3,808 | Dec 23, 1991 |
| Encino Viejo Ranch #4SW | Midwestern Expl Co | Cancelled | Enhanced recovery | — | 300 | 3,715–3,805 | May 16, 2000 |
| Spinach Elaine Unit #C 1 | Hughes, Dan A. Co, L.P | Plugged | Enhanced recovery | — | 250 | 3,966–3,980 | Sep 27, 2001 |
| Ware, Alpha #1012 | Forest Oil Corp | Cancelled | Enhanced recovery | — | 250 | 3,200–3,234 | Aug 13, 1969 |
| H & F Properties #2 | Hughes Texas Petro, Ltd | Cancelled | Enhanced recovery | — | 200 | 3,688–3,756 | Jul 24, 1986 |
| Encino Viejo Ranch #4 | Hughes Texas Petro, Ltd | Cancelled | Enhanced recovery | — | 200 | 3,794–3,848 | Jul 24, 1986 |
| Elaine Sand Oil Unit II #1 | Jennings Expl Co | Cancelled | Enhanced recovery | — | 200 | 3,618–3,636 | May 16, 1988 |
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.