NSF Std 60 certification ...
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
NSF Std 60 certification deals with the quality of the TCCA drinking water grade commercial product, not the efficacy or safety. That is the province of the WHO Guideline which is 50 mg/L as the sodium salt and 40 mg/L as the chloroacid.