Recommended Chemical Levels in Swimming Pools and Spas
| |
Minimum |
Ideal |
Maximum |
|
Free chlorine residual Pools |
2.0 |
2.0 - 3.0 |
10.0 |
|
Free chlorine residual, Spas Wading pools and Spray Grounds |
3.0 |
3 -4 |
10.0 |
|
Combined chlorine |
0 |
0 |
0.5 |
|
Bromine, Pools |
4.5 |
4.5 - 6.5 |
22.0 |
|
Bromine, Spas Wading pools and Spray Grounds |
6.5 |
6.5 - 7.5 |
22.0 |
|
Oxidation-reduction Potential (ORP) |
650 mV |
- |
900 mV |
|
pH |
7.2 |
7.4 - 7.6 |
7.8 |
|
Cyanuric acid |
0 |
30 - 50 |
100 |
|
Total alkalinity |
80 |
100 - 150 |
180 |
|
Calcium Hardness |
150 |
200 - 300 |
500 |
|
Copper |
0 |
0 |
0.3 |
|
Iron |
0 |
0 |
0.2 |
Total dissolved solids:
Swimming pools
Spa pools |
300
300 |
-
- |
2,000 over start
1,500 over start |
All readings are in parts per million unless otherwise
indicated.
Note: Currently, the legal minimum free chlorine residual in public
pools in California is 1.0 ppm for pools not using stabilizer (cyanuric acid) and 1.5 ppm
for pools using stabilizer.
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