Produced water and disposal in Willacy 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 →
Willacy County has 33 active injection and disposal wells, 6 of them permitted for disposal, with 82,100 barrels a day of permitted capacity.
Operators reported 2.0 million barrels injected on H-10 filings in the twelve months to June 2025, down 17% on the year before, about 7% of what the permits allow.
Citation Oil & Gas Corp. is the largest injector in the county, with 1.6 million barrels reported across 27 active wells.
- 33
- active injection wells, 6 for disposal
- 82.1K
- bbl/d permitted capacity
- 2.04M
- bbl reported, H-10 year to Jun 2025 -17%
- 7%
- of permitted capacity used
- 173
- UIC permits on file, all time
Reported injection, by month
H-10 FILINGS · TEN YEARS TO JUN 2025
Last 12 months 2,039,114 · prior 12 2,451,507(-17%)
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 |
|---|---|---|---|
| Citation Oil & Gas Corp. | 1.6M | 27 | 63.4K |
| Shoco Production LLC | 316K | 1 | 6K |
| Texas Oil and Gas Operating, LLC | 119K | 3 | 10.2K |
| Apollo Petro Fuels LLC | — | 1 | 2K |
| Dewbre Petroleum Corporation | — | 1 | 500 |
Injection permits
173 UIC PERMITS · 33 ACTIVE · PAGE 2 OF 2
Active permits first, by reported volume, then canceled, plugged, and never-activated permits.
| Well | Operator | Status | Purpose | Reported, bbl | bbl/d permitted | Zone, ft | Permitted |
|---|---|---|---|---|---|---|---|
| Willamar West Unit #25 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,650–7,964 | Aug 17, 1983 |
| Willamar West Unit #150WI | Citation Oil & Gas Corp. | Plugged | Enhanced recovery | — | 1,500 | 7,650–8,150 | Aug 17, 1983 |
| Willamar West Unit #151WI | Citation Oil & Gas Corp. | Plugged | Enhanced recovery | — | 1,500 | 7,650–8,150 | Aug 17, 1983 |
| Willamar West Unit #152 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,650–8,150 | Aug 17, 1983 |
| Willamar West Miocene Unit #33 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,650–8,150 | Aug 17, 1983 |
| Sauz Ranch Mulatos Pasture #43 | Exxon Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,840–7,930 | Feb 14, 1986 |
| Sauz Ranch Mulatos Pasture #39 | Chestnut Explor. and Prod., Inc. | Canceled | Enhanced recovery | — | 1,500 | 7,824–7,939 | Feb 14, 1986 |
| Sauz Ranch Mulatos Pasture #2 | Chestnut Explor. and Prod., Inc. | Canceled | Enhanced recovery | — | 1,500 | 7,817–7,926 | Feb 14, 1986 |
| Sauz Ranch Mulatos Pasture #49 | Exxon Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,907–7,950 | Feb 14, 1986 |
| Sauz Ranch Mulatos Pasture #185 | Exxon Corp. | Canceled | Enhanced recovery | — | 1,500 | 7,864–7,935 | Feb 14, 1986 |
| Sauz Ranch Mulatos Pasture #61 | Chestnut Explor. and Prod., Inc. | Canceled | Enhanced recovery | — | 1,500 | 7,848–7,920 | Feb 14, 1986 |
| Yturria Cattle Co. -B- #1 | Mabee Petroleum Corp. | Plugged | Other | — | 1,500 | 6,170–6,172 | Jun 22, 1973 |
| Sauz Ranch Mulatos Pasture #69 | Humble Oil & Refining Co. | Canceled | Other | — | 1,500 | 7,670–7,720 | Jun 26, 1969 |
| Willamar West Unit SWD #132 | Citation Oil & Gas Corp. | Plugged | Disposal | — | 1,300 | 3,200–3,700 | Jul 14, 1986 |
| Sauz Ranch Mulatos Pasture #64 | Chestnut Explor. and Prod., Inc. | Canceled | Enhanced recovery | — | 1,000 | 7,706 | Feb 15, 1985 |
| Sauz Ranch Mulatos Pasture #63 | Exxon Corp. | Canceled | Enhanced recovery | — | 1,000 | 7,705–7,738 | May 13, 1986 |
| Yturria Cattle Co. #8D | Durango Resources Corp. | Plugged | Disposal | — | 1,000 | 3,105–3,210 | Nov 27, 1996 |
| Parham, Ellie #1 | Whittington Operating Company | Canceled | Disposal | — | 1,000 | 2,910–3,040 | May 2, 1991 |
| Willamar West Unit #61 | Citation Oil & Gas Corp. | Inactive | Enhanced recovery | — | 1,000 | 7,862–7,972 | Nov 17, 1992 |
| Yturria, Frank D. #307 | Cody Energy LLC | Plugged | Enhanced recovery | — | 1,000 | 4,696–4,900 | Jun 13, 2001 |
| 7300' Gas Unit #1 | Proline Energy Resources Inc | Inactive | Disposal | — | 1,000 | 2,700–4,900 | Dec 1, 2005 |
| Sauz Ranch Mulatos Pasture #59 | Humble Oil & Refining Co. | Plugged | Other | — | 1,000 | 7,935–7,970 | Aug 10, 1967 |
| Sauz Ranch Mulatos Pasture #52 | Humble Oil & Refining Co. | Canceled | Other | — | 1,000 | 8,024–8,066 | Aug 10, 1967 |
| Sauz Ranch Mulatos Pasture #105 | Humble Oil & Refining Co. | Canceled | Other | — | 1,000 | 7,924–7,955 | Nov 7, 1969 |
| Parham, Ellie #4D | Modern Exploration, Inc. | Plugged | Disposal | — | 900 | 2,010–2,546 | Oct 6, 1980 |
| Yturria L & C Co. NCT-2 #49 | Cody Energy LLC | Canceled | Disposal | — | 900 | 3,200–4,310 | Oct 19, 1992 |
| Yturria Cattle Co. #17 | Mabee Petroleum Corp. | Canceled | Disposal | — | 800 | 2,256–2,300 | Mar 20, 1979 |
| Bell, S. H. -B- #2 D | Exxon Corp. | Canceled | Disposal | — | 700 | 3,420–3,497 | Nov 17, 1981 |
| Yturria L & C Co. NCT-2 #48WD | Texaco E & P Inc. | Canceled | Disposal | — | 600 | 3,150–3,950 | Jun 28, 1983 |
| La Sal Vieja #3D | Apache Corporation | Plugged | Disposal | — | 500 | 2,650–4,900 | Mar 21, 1986 |
| Yturria L&C Co.nct-2 #43 | Cody Energy LLC | Canceled | Enhanced recovery | — | 500 | 4,665–4,694 | Jun 13, 2001 |
| Willamar West Unit #138 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 450 | 7,852–7,964 | Dec 2, 1977 |
| Willamar West Miocene Unit #M 44 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 450 | 7,862–7,954 | Dec 2, 1977 |
| Willamar West Unit #141 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | 450 | 7,852–7,970 | Dec 2, 1977 |
| Todd, Chess #4D | Smith Production Inc. | Canceled | Disposal | — | 450 | 4,100–4,700 | Apr 3, 1985 |
| Armendaiz et Al #1D | Mueller Engineering Corp. | Canceled | Disposal | — | 400 | 1,030–1,600 | May 9, 1977 |
| Armendiaz #3 | Cox, Edwin L. | Canceled | Disposal | — | 200 | 570–612 | Jul 9, 1976 |
| Todd, Chess #1WD | Texas, L. Petroleum, Inc. | Canceled | Other | — | — | 3,816 | Nov 1, 1966 |
| Yturria Cattle Co. #14 | Mabee Petroleum Corp. | Canceled | Enhanced recovery | — | — | — | Jul 23, 1973 |
| Yturria L. & L. Co. -a- NCT-1 #30WD | Texaco Inc. | Canceled | Other | — | — | 3,200 | — |
| Yturria L & C Co. NCT-2 #21 | Texaco Inc. | Canceled | Other | — | — | 3,750 | — |
| Willamar West Unit #231WS | Citation Oil & Gas Corp. | Canceled | Other | — | — | 7,600 | — |
| Willamar West Unit #157WS | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | Nov 30, 1971 |
| Willamar East Unit #23 | Citation Oil & Gas Corp. | Canceled | Other | — | — | 7,600 | — |
| Willamar West Unit #7 | Amoco Production Company | Canceled | Other | — | — | — | — |
| Willamar West Unit #9 | Amoco Production Company | Canceled | Other | — | — | — | — |
| Willamar West Unit #18 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #35 | Citation Oil & Gas Corp. | Canceled | Other | — | — | 3,300 | — |
| Willamar West Unit #37 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #49 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #50 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | — | — | Apr 26, 1966 |
| Willamar West Unit #64 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #87 | Citation Oil & Gas Corp. | Canceled | Other | — | — | 7,730–7,827 | May 7, 1952 |
| Willamar West Unit #88 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #109 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #111 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #113 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #115 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #116 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | — | — | — |
| Willamar West Unit #117 | Citation Oil & Gas Corp. | Canceled | Other | — | — | 3,300 | — |
| Willamar West Unit #118 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #120 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #122 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Willamar West Unit #125 | Citation Oil & Gas Corp. | Canceled | Other | — | — | — | — |
| Sauz Ranch Mulatos Pasture #120 | Exxon Corp. | Canceled | Other | — | — | 3,226 | — |
| Willamar West Miocene Unit #M 13 | Citation Oil & Gas Corp. | Plugged | Disposal | — | — | 3,250–4,450 | Dec 28, 1982 |
| Sauz Ranch Mulatos Pasture #208 | Exxon Corp. | Canceled | Enhanced recovery | — | — | 7,860 | Mar 26, 1986 |
| Sauz Ranch Mulatos Pasture #210 | Exxon Corp. | Canceled | Enhanced recovery | — | — | 7,835 | Mar 26, 1986 |
| Sauz Ranch Mulatos Pasture #16 | Exxon Corp. | Canceled | Enhanced recovery | — | — | 7,798–7,850 | Oct 20, 1987 |
| Willamar West Unit #89 | Citation Oil & Gas Corp. | Canceled | Enhanced recovery | — | — | 7,763–7,830 | Nov 18, 2014 |
| Willamar West Miocene Unit #37 | Citation Oil & Gas Corp. | Inactive | Enhanced recovery | — | — | 6,248–6,260 | Dec 15, 2014 |
| Willamar East Unit #3 | Citation Oil & Gas Corp. | Inactive | Enhanced recovery | — | — | 7,606–7,644 | Jul 8, 2015 |
| Willamar East Unit #8 | Citation Oil & Gas Corp. | Inactive | Enhanced recovery | — | — | 7,544–7,566 | Aug 3, 2015 |
Latest disposal drilling permits
W-1 drilling permits in the county tagged as produced-water disposal.
| Issued | Permit | Operator | Lease / well |
|---|---|---|---|
| Dec 7, 2011 | 729005 | Titan Vacuum Services, LLC | Raymondville SWD #1 48931261 |
| Nov 8, 1985 | 289533 | Amoco Production Company | La Sal Vieja Swds #3SW 48900531 |
| Oct 25, 1982 | 175285 | Amoco Production Company | Willamar West (Miocene) Unit #M-13 48930119 |
| Jun 26, 1980 | 85196 | Energy Sources, Inc. | Parham, Ellie SWD #4D 48930623 |
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/willacy, documented in the API reference.