Nitrate
AgriculturalDetected in 9,621 of the 20,609 ZIP codes we analyze (47% of areas).
Standards & Effects
MCL (Maximum Contaminant Level)
10 ppm
Health Effects
Methemoglobinemia (blue baby syndrome) in infants
Common Sources
Fertilizers, manure, sewage
Filtration Options
Reverse osmosis, ion exchange
Look for filters certified by NSF International or WQA for removal of Nitrate.
See the Filter Guide →Where It's Been Detected
Largest areas with Nitrate 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.