Total volumes of produced water disposed at percolation and evaporation ponds for the Midway-Sunset and Buena Vista Oil Fields, Kern County, California were estimated for 1959-2021. Data were compiled from state and local agencies’ databases, including the California State Water Resources Control Board GeoTracker, California Integrated Water Quality System (CIWQS), and Ponds Status Report (2019); the California Geologic Energy Management Division (CalGEM) Well Production and Injection Database (1977-2017); and the Central Valley Regional Water Quality Control Board Pond List (updated February 11, 2021). For pond disposal facilities that receive produced water from multiple sources, volumes were estimated from cumulative values (historical through 1986), approximate daily rates of disposal, and annual flow estimates reported in technical and annual monitoring reports and waste discharge requirements. For ponds at individual oil and gas leases, produced water volumes were estimated from annual and monthly flow values in technical and annual monitoring reports; water production volumes from oil wells at the leases were used to estimate disposal volumes during years with no data. Reported values are given in the “MSBV_ponds_disposal_volumes.csv” table and total estimated produced water disposal at each pond is summarized in the “MSBV_ponds_summary.csv” table. A comparison between pond water disposal and oil well water production volumes for years that have data for both is available in the “MSBV_disposal_production_comparison.csv” table.
