COUNTIES · EAGLE FORD SHALE · DISTRICT 01 · CODE 491
Williamson County, Texas
Williamson County has had no new drilling permits in the past 90 days; the most recent permit on record was issued July 11, 2024.
The county has 2 active disposal and injection permits.
321 drilling permits have been issued in Williamson County since 1977.
321 permits on file since 1977 · last issued Jul 11, 2024
Watch Williamson CountyAlso: every Williamson County well in the statewide list, searchable → · a year of permits on the map →
- 0
- permits issued, 365d
- —
- vs prior 365d (0)
- 0
- operators filing
- —
- horizontal
- —
- avg permitted depth, ft
- 140
- operators, all time
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 5, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 120 MONTHS · BY ISSUE DATE
Last 12 months 0 · prior 12 0
Operators by well inventory
No permits in the last year; ranked by wells on the RRC wellbore file instead.
New entrants, last 12 months
Operators whose first permit in Williamson County came in the last year. None.
Formations in completed wells
RRC WELLBORE FILE · ≥10 WELLS
Tops reported on completion filings for wells in Williamson County. A well counts for every formation it reports, so this reads as the county's stratigraphic column. About tops →
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 2
- active UIC permits of 14
- 0
- permitted bbl/day, active
- 0
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Every active well, operator, and daily reporter in Williamson County →
Permitted volume is a ceiling, not throughput. How to read it →
TexNet catalog via USGS
Seismicity, last 2 years
- 0
- M2+ events in the area
- —
- largest
Monthly counts, magnitudes, and every recent event in the area →
Events are not tagged with a county; this counts M2+ events inside the bounding box of the county’s located permits, padded 0.1°. About TexNet →
Latest permits
NEWEST FIRST BY ISSUE DATE
| Permit | Seen | Issued | Operator | Lease / well | Depth | API |
|---|---|---|---|---|---|---|
| 901117 | Jul 11, 2024 | Jul 11, 2024 | North Texas Energy,inc. | Rieger #10 | 1,500 | 49130504 |
| 899899 | May 23, 2024 | May 23, 2024 | Walker Operating Company | Warner #1 | 1,600 | 49130503 |
| 897503 | Feb 26, 2024 | Feb 26, 2024 | Walker Operating Company | Alan #1 | 1,000 | 49130501 |
| 897485 | Feb 22, 2024 | Feb 22, 2024 | Walker Operating Company | Joseph #1 | 1,000 | 49130502 |
| 897434 | Feb 22, 2024 | Feb 22, 2024 | Walker Operating Company | Daniel #2 | 1,000 | 49130500 |
| 897433 | Feb 22, 2024 | Feb 22, 2024 | Walker Operating Company | Daniel #1 | 1,000 | 49130499 |
| 887604 | Jan 26, 2023 | Jan 26, 2023 | North Texas Energy,inc. | Spellings #2 | 2,000 | 49130497 |
| 885727 | Nov 21, 2022 | Nov 21, 2022 | Flint Hills Resources, LC | Storm TPL1 #1 | 350 | 49130496 |
| 877323 | Feb 28, 2022 | Feb 28, 2022 | Walker Operating Company | Poldrack #3 | 1,850 | 49130495 |
| 877322 | Feb 28, 2022 | Feb 28, 2022 | Walker Operating Company | Poldrack #2 | 1,850 | 49130494 |
Questions about Williamson County
How many drilling permits were issued in Williamson County in the last 12 months?
0 permits were issued in Williamson County in the last 12 months. The most recent was issued Jul 11, 2024. 321 are on file since 1977.
Every Williamson County permit →Which operator has the most wells in Williamson County?
No operator has filed a drilling permit in Williamson County in the last 12 months. By wells on file, the largest is Genesis Well Service, with 52, followed by Thrall Operating Company Inc. (21) and Magnum Oilfield Services LLC (17).
Operators in Williamson County →How many oil and gas wells are in Williamson County?
433 wells are on file in Williamson County: 65 active and 182 plugged. 0 are horizontal, and 3 operators hold them.
Every well in Williamson County →How much oil and gas does Williamson County produce?
The Railroad Commission files oil and gas production by lease, not by well or by county. Each lease with wells in Williamson County is listed with its reported production on the county's Leases tab.
Leases in Williamson County →What formations are drilled in Williamson County?
Completion filings for wells in Williamson County report tops for 2 formations in at least ten wells each. The most reported are the Navarro (14 wells, median top 532 ft) and the Taylor (14 wells, median top 761 ft).
Formations in Williamson County →What basin is Williamson County in?
Petrora lists Williamson County in the Eagle Ford Shale. It is in the Railroad Commission's District 01.
The Eagle Ford Shale →Have there been earthquakes in Williamson County?
TexNet located no earthquakes of magnitude 2 or more in the area of Williamson County's permitted wells in the last 2 years.
Earthquakes in Williamson County →About this data
Drilling permits from the RRC OGA049M master and daily daf420 files, rebuilt nightly into per-county figures; windows are on the date issued. Disposal from UIC permits and H-10 reports at the last settled month; earthquakes from the TexNet catalog inside the county's located-permit footprint.
Developers: this page as JSON is GET /v1/data/counties/tx/williamson?days=365, documented in the API reference.