2025 Nelsen Corporation Catalog - Catalog - Page 422
17 National Secondary Drinking Water Regulations
Technical & Engineering
Contaminant
SMCL,MG/l+
Iron
0.3 (total iron)
Ferrous Iron (Fe )
+2
0.3 (total iron)
Treatment Methods
Filtration (oxidizing filters)
Distillation
Reverse Osmosis*
Pressure Aeration/Filtration
Cation Exchange
Electrodialysis
Filtration
Sand
Cartridges
Calcite (also raise pH to 7.2)
Greensand
Oxidation/Precipitation/Filtration
Ferric Iron (Fe+3)
0.3 (total iron)
Sequestered iron
Iron Bacteria
Strong oxidation and/or fine (10 micron or
