Our data
Where the numbers come from
- EPA ECHO Safe Drinking Water data, July to September 2026 extract
- Florida DEP chemical sample results, 2018-2022
- EPA Unregulated Contaminant Monitoring Rule, rounds 3, 4 and 5
- Guidelines: California OEHHA public health goals and the EPA PFBS health advisory; legal limits: EPA MCLs and action levels
Disclaimer
Water Scores and reports are educational estimates from public data, not medical advice. Levels are compared with published health guidelines and federal legal limits; we do not make conclusions about anyone's health. Data may be one to three years old and may not reflect water at your tap.