available for download<\/a>.
<\/p>This layer shows declustered water quality data for arsenic,\nnitrate, 1,2,3-trichloropropane, per square mile section that was used to\ncreate the aquifer risk map required by SB-200. The intent of the aquifer risk\nmap is to help prioritize areas where domestic well users and state small water\nsystems may be accessing groundwater that does not meet primary drinking water\nstandards (maximum contaminant level or MCL) and will be updated annually\nstarting January 1, 2021. <\/p>\n\n
The section water quality data is based on depth-filtered\nwater quality results from public and domestic supply wells, collected\nfollowing a similar methodology as the Domestic\nWell Needs Assessment White Paper<\/a>. This layer contains the long-term\naverage (20 years) as well as the count of recent results (within 2 years)\nabove the MCL, between 80% - 100% of the MCL, and below 80% of the MCL for each\nsquare mile section. <\/p>",
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