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UIC Database (ASCII)

Injection and disposal wells: permits, authorised pressure and volume, monitoring and enforcement.

What this is

UIA010. Every saltwater disposal well, enhanced-recovery injector and storage well permitted under the Underground Injection Control programme, in 622-byte records across fourteen record types.

The inventory record carries the control number, the permit dates, the UIC class, the injection type, the approved injection interval, the maximum authorised surface pressure and daily volume, and a long list of what may be injected. Two child files hang off it — the monitoring …

How it is laid out

The Railroad Commission publishes this as Fixed-width ASCII. Columns are byte ranges with no separators, described only in a scanned record layout. We decode it into a table you can open anywhere. It has 84 columns and about 126.7K rows.

The columns you will most likely want:

  • cntl_no The UIC control number this monitoring row belongs to.
  • record_type The two-byte record type from the original hierarchical file. Constant within a table; kept so a row can …
  • cntl_no The UIC control number this remark belongs to.
  • remark_text One line of free-text permit remark. Order by row number to rebuild it.
  • cntl_no The UIC control number. Primary key here, and the join key for the monitoring and remark tables.
  • monitor_date Date of the monitoring event.

…and 78 more, all documented on the full page.

What we add

Find every disposal well within an area, with its permitted daily volume and maximum pressure — the two numbers that matter for seismicity and for aquifer risk.

See what an operator is authorised to inject, from produced water to CO2 to fracture flowback, and check …

  • Decoded out of the Commission's original format into something Excel opens.
  • Filterable before you download, so you can take one county instead of the whole state.
  • The Commission's single-letter codes translated into words.

Worth knowing before you use it

The API number here is only the five-digit unique component; the county is in its own column. Concatenate the two to get the eight-digit API the rest of the catalog uses.

dist is RRC's internal district number, not the printed designation.

Permitted volume and pressure are what the permit authorises, not what was injected. Actual …

The full page lists every trap in this dataset.

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