Water Quality Risk

This is the map image layer. The feature layer is available here. The aquifer risk map is being developed to fulfill requirements of SB-200 and is intended to help prioritize areas where domestic wells and state small water systems may be accessing groundwater that does not meet primary drinking water standards (maximum contaminant level or MCL). In accordance with SB-200, the risk map is to be made available to the public and is to be updated annually starting January 1, 2021. This layer is part of the 2022 Aquifer Risk Map. The Fund Expenditure Plan states the risk map will be used by Water Boards staff to help prioritize areas for available SAFER funding. This layer contains summarized water quality risk per square mile section and per well point. The water quality risk is based on depth-filtered, de-clustered water quality results from public and domestic supply wells for all contaminants with an MCL (plus hexavalent chromium). The methodology used to determine water quality risk is outlined here. To provide comments or feedback on this map, please email [e-mail] or [e-mail].