Lead · California

Lead in California water

Lead was detected in 110 of 400 California cities with a published result, 1 of them above the action level.

Check lead where I live All California water

Where lead is found in California

1 city above the action level

Cities where detected · above the action level first

Not detected or no usable result: 290 cities

Values are from the published EPA record; a contaminant that was never tested is shown as pending, never as a pass. Above the action level is a regulatory trigger for the system, not a measurement of any single home.

Treatment, if a finding establishes a need

What can carry a lead reduction claim

Compare treatments for lead

Reverse osmosis
Semi-permeable membrane separation removing dissolved minerals, heavy metals, and persistent fluorinated chemicals down to 0.0001 microns.
NSF/ANSI 53NSF/ANSI 53 lead-certified filters
Replacing lead service lines

What does not help

Boiling does not remove a dissolved chemical compound and can concentrate it. Many pitcher and refrigerator filters carry no verified claim for a compound like this at all.

Order of operations

A finding establishes the need, the need names the capability, the capability requires a verified certification. No product appears before that sequence completes. Filter Finder →

Check your water

1 city above the action level

What can carry a lead reduction claim

Find the water system behind your tap.