Arsenic
Heavy MetalDetected in 6,822 of the 20,609 ZIP codes we analyze (33% of areas).
Standards & Effects
MCL (Maximum Contaminant Level)
10 ppb
Health Effects
Skin damage, circulatory problems, increased cancer risk
Common Sources
Natural deposits, agricultural and industrial runoff
Filtration Options
Reverse osmosis, activated alumina
Look for filters certified by NSF International or WQA for removal of Arsenic.
See the Filter Guide →Where It's Been Detected
Largest areas with Arsenic 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.