Residual Chlorine
OtherDetected in 4 of the 20,609 ZIP codes we analyze (0% of areas).
Standards & Effects
MCL (Maximum Contaminant Level)
See EPA standards
Health Effects
Varies by contaminant and exposure level
Common Sources
Industrial and natural sources
Filtration Options
Consult your local water quality report
Look for filters certified by NSF International or WQA for removal of Residual Chlorine.
See the Filter Guide →Where It's Been Detected
Largest areas with Residual Chlorine detections on record
Note: This information is educational. For personalized water testing and treatment recommendations, contact your local water utility or a certified water quality professional.