Chapter 42: EPA’s limit on copper in drinking water: 1.3 mg/Liter National Primary Drinking Water Regulationshttps://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations#Organic The limits for copper are 1.3 mg/Liter.The limits for fluoride are 4 mg/Liter. The usual amount of fluoride in water is 0.7 mg/Liter, also expressed as 0.7 ppm. That speaks volumes. Fluoride is a neurotoxin. Copper heals the … Continue reading Chapter 42: EPA’s limit on copper in drinking water: 1.3 mg/Liter