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APPENDIX B: CHEMICAL STANDARDS
National Spa and Pool Institute’s Suggested chemical Standards for Swimming Pools
*
For Liquid chlorine, Cal-Hypo and Lithium Hypo (for Gas Chlorine, Dichlor, Trichlor and Bromine compounds
100-200 is ideal).
**
Except where limited by Health Dept. requirements (often to 100 PPM).
*
For Liquid chlorine, Cal-Hypo and Lithium Hypo (for Gas Chlorine, Dichlor, Trichlor and Bromine compounds
100-120 is ideal).
**
Except where limited by Health Dept. requirements (often to 100 PPM).
Table for Pools
Minimum
Ideal
Maximum
Free Chlorine, PPM
1.0
1.0-3.0
3.0
Combined Chlorine, PPM
None
None
0.2
Bromine, PPM
2.0
2.0-4.0
4.0
pH
7.2
7.4-7.6
7.8
Total Alkalinity, PPM
60
80-100*
180
TDS, PPM
300
1,000-2,000
3,000
Calcium Hardness, PPM
150
300-400
500-1000+
Cyamuric Acid, PPM
10
30-50
150**
Table for Spas
Minimum
Ideal
Maximum
Free Chlorine, PPM
1.0
3.0-5.0
10.0
Combined Chlorine, PPM
None
None
0.2
Bromine, PPM
2.0
3.0-5.0
10.0
pH
7.2
7.4-7.6
7.8
Total Alkalinity, PPM
60
80-100*
180
TDS, PPM
300
1,000-2,000
3,000
Calcium Hardness, PPM
150
200-400
500-1000+
Cyamuric Acid, PPM
10
30-50
150**
