EWG health standards are independent, health-focused targets based on the latest water quality research. They often go beyond federal limits, which may be outdated or unavailable for many contaminants known to pose health risks. Contaminant data shown is compiled from monitoring programs and other public reports over multiple years. Values may reflect guidelines rather than federal drinking water limits. Actual water quality may vary over time. This information is provided for educational purposes only and is not a substitute for current utility reports or independent water testing.