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Lead Levels in San Francisco Schools

San Francisco Unified School District tested the school's drinking water for lead last year. This map shows the highest lead levels detected at each school based on multiple sample sites and dates.

There is no safe level of lead, especially for children. Even small amounts can lower IQ. Damage from lead exposure is irreversible. Take action with CALPIRG's "Get The Lead Out:Back to School Toolkit."

Data wrangling: Sadie Gill @ Flowwest. Mapping, front-end, data viz: Lo BĂ©nichou @ Mapbox.
Lead content < 1 ppb
Lead content between 1 and 5 ppb Lead content between 5 and 15 ppb Lead content > 15 ppb