Notwithstanding its branding as one of the most environmentally-protective states, California ranks poorly in its regulation and enforcement of oil/gas waste, and particularly the industry's wastewater (aka, “produced water”).  The recent audit cites many deficiencies, including being the only state that allows produced water to be disposed of in unlined percolation/evaporation ponds (which can seep into underground freshwater aquifers), inadequate regulation of radionuclides, and human-induced earthquakes (from underground injection wells).  Finally, even with its more lax regulations, the report calls-out many “exemptions” that have been allowed, as well as poor enforcement.

Summary: “New Report Finds California Fails to Safely Manage Radioactive and Toxic Oil and Gas Waste”

Full Report: “California Oil and Gas Waste Report”