Suggested NSPI Standards - Swimming Pools
Free Chlorine, ppm1.0 1.0-3.0 3.0
Combined chlorine, ppm NoneNone 0.2
Bromine, ppm 2.0 2.0-4.0 4.0
Total Alkalinity, ppm 8080-100 180
(for Liquid Chlorine, Cal-Hypo and Lithium Hypo)
(for gas chlorine, dichlor, trichlor and bromine compounds)
TDS,ppm 300 1000-2000 3000
Calcium Hardness, ppm 250 250-400 500-1000+
Cyanuric Acid, ppm30 30-50 150
(except where limited by Health Dept. requirements, often to 100 ppm)
Suggested NSPI Standards - Spas
- Free Chlorine, ppm 1.01.0-3.010.0
- Combined chlorine, ppm NoneNone 0.2
- Bromine, ppm 2.02.0-4.0 10.0
- Total Alkalinity, ppm80 80-100180
(for Liquid Chlorine, Cal-Hypo and Lithium Hypo)
(for Gas Chlorine, Dichlor,Trichlor and Bromine Compounds)
- TDS,ppm 300 1000-2000 3000
- Calcium Hardness, ppm 250 250-400 500-1000+
- Cyanuric Acid, ppm 1030-50150