Lead in Drinking Water

It isn't just lead pipes that contaminate drinking water. If you have copper pipes or corroded galvanized pipes in your home, there can be lead in your drinking water. Even if your water district tests the water coming to your home, you could still have lead being added before the water comes out your faucet. Schools and daycares in Washington have a schedule for testing the water coming out of every single faucet. To prevent drinking and cooking with contaminated water, filter your water and/or get it tested. Click here for testing resources.

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EPA FREQUENTLY ASKED QUESTIONS ABOUT DRINKING WATER PILOT STUDY
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The most common way that lead enters drinking water is through the corrosion of lead or galvanized iron plumbing.

EPA Frequently Asked Questions about Drinking Water Pilot Study
USS Lead Superfund Site www.epa.gov/uss-lead-superfund-site East Chicago, Indiana January 2017 
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LEAD TEST RESULTS FROM DRINKING WATER IN WA SCHOOLS

Schools must have their drinking water tested for lead at least once between July 1, 2014, and June 30, 2026. Retesting is required at least once every five years beginning July 1, 2026.
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Water--EPH-DW--4200, Drinking. “Lead Test Results from Drinking Water in Schools | Washington State Department of Health.” Doh.wa.gov, doh.wa.gov/community-and-environment/drinking-water/contaminants/lead/lead-schools/testing/test-results.

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https://www.epa.gov/sites/default/files/2017-08/documents/epa_lead_in_drinking_water_final_8.21.17.pdf