Dataset of Wastewater Pits in CA. Above ground wastewater pits, also known as sumps, are used in California to dispose of oil and gas wastewaters, such as flowback fluid, hydraulic fracturing and acidizing chemicals and other produced waters.
This dataset contains data on the all wastewater pits located in the Central Valley (Region 5) and Central Coast (Region 3).  The Region 5 dataset has been revised to remove duplicate entries.  Each pit has been given its own entry.  This has not been done for Region 3, as the regional water board has not provided pit counts. Wastewaters commonly contain oils and grease, boron, chlorides, bromides, VOC's, semi-VOC's, other petroleum and diesel organics; trace metals such as manganese and arsenic; as wells as naturally occurring radioactive materials. 
In the Central Valley (Region 5) The data shows there are currently 1,088 ponds; 719 are listed as Active, the rest are Idle. 444/939 (47.3%) ponds do not list a permit. 434 are operated by Valley Water Management Corporation.
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