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National Drinking Water Database

Lithium in California

Lithium is a pollutant from mining and industrial manufacturing of metal alloys, ceramics, and batteries; it occurs naturally in soil and rock. [read more]

The Most Polluted Communities in California

7 water utilities reported detecting Lithium in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Lithium level

RankSystem Population Served Positive test results of total reported tests Average Level
1Metropolitan Water District of Southern California
Los Angeles, CA
17,000,0005 of 525.98 ppb
(10.33 to 49 ppb)
2City of Napa
Napa, CA
70,0003 of 613.88 ppb
(0 to 40 ppb)
3Cabana Holiday Ws
Salinas, CA
4001 of 16.1 ppb
(6.1 ppb)
4City of Santa Clara
Santa Clara, CA
102,5008 of 95.58 ppb
(0 to 7.93 ppb)
5Glendale-City, Water Dept.
Glendale, CA
200,000259 of 2613.37 ppb
(0 to 7.6 ppb)
6LA Puente Valley Cwd
La Puente, CA
7,5002 of 22.02 ppb
(2 to 2.03 ppb)
7Santa Clara Valley Water District
San Jose, CA
02 of 210.52 ppb
(0 to 6 ppb)

Health Based Limits for Lithium

There are no health based standards that EWG is using for this chemical

Violation Summary for Lithium in California

There are no violations reported for this contaminant in California