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Water Quality Inquiry (WQI)

Sample results from the Water Quality Master (WQM) going back to January 2006 are available for viewing by first selecting the public water system (PWS) using the Search box below. Enter a partial system number, name, county, or Regulatory Agency, then make your selection. (Examples: CA3410004, 3410004, Carmichael, Sacramento, LPA84, Klamath). Sorting of results can be done by clicking headers. Maximum Contaminant Level (MCL) exceedances are shown in BOLD; DLR values reflect the required testing detection limit for the contaminant. Since the source is over 12 million records, please be patient until the data load. Results are displayed at the bottom of the system list.