Northern Culberson-Reeves SRA
State-designated seismic response area — effective since October 2021
Boundary and in/out well flags use the officially published outer response-area ring. Restriction tiers vary within it — confirm current orders with the regulator before relying on them.
167
SWD wells inside SRA
48
Operators affected
23.5%
Avg capacity utilization
40,569,842
Sum of latest monthly filings (bbl)
2,565
Earthquakes in SRA (12mo)
3.9
Max magnitude (12mo)
What is a Seismic Response Area?
A Seismic Response Area (SRA) is a geographic zone designated by the Texas Railroad Commission where injection rates at saltwater disposal wells are reduced or monitored more closely due to induced seismicity concerns. Wells inside an SRA may face volume restrictions, enhanced reporting requirements, and additional permitting conditions.
The Northern Culberson-Reeves Seismic Response Area covers northern Culberson and Reeves counties in the Delaware Basin. Established in October 2021 and expanded in December 2022, this is the largest SRA in the Permian Basin. A magnitude 5.4 earthquake in May 2025 — the strongest induced seismic event in Texas history — triggered a suspension of all deep disposal permits in this zone.
PermianIQ tracks 167 SWD wells inside the Northern Culberson-Reeves SRA, operated by 48 companies. Estimated average capacity utilization is 23.5%. 2,565 seismic events have been recorded within the SRA boundary in the past 12 months, with a maximum magnitude of 3.9.
TRC reference: TRC Seismicity Response - NCR Area
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