Exhibit_9.1_Water_Quality_Requirements_for_Aquatic_Venues.pdf
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Attachment 13 Exhibit 9.1 Water Quality Reqs. for Aquatic Venues
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TB MED 575
APPENDIX D
WATER QUALITY REQUIREMENTS FOR AQUATIC VENUES1
Table D–1. Water chemistry requirements for aquatic venues
Parameter Minimum Ideal Maximum Minimum Monitoring Frequency
Free chlorine—pools, splash pads, aquatic play features (mg/L)
1.0
2.02 2.0 5.0 Every 2 hours (hrs)
Free chlorine— spas/therapy pools (mg/L)
3.0 3.0–5.0 10.0 Every 2 hrs
Combined chlorine (mg/L) 0.0 0.0 0.4 Weekly
Bromine (mg/L) 3.0 (pools)
6.0 (spas)
3.0 (pools)
6.0 (spas)
4.0 (pools)
6.0 (spas) Every 2 hrs
ORP (millivolts) 650 750–900 N/A Every 2 hrs pH 7.2 7.4–7.6 7.8 Every 2 hrs Total alkalinity (mg/L) 60 80–120 180 Weekly
Calcium hardness— pools (mg/L) 150 200–400 400 Monthly
Calcium hardness— spas (mg/L) 100 150–250 800 Monthly
Total dissolved solids (mg/L) 0 N/A 1,500 above fill water TDS level Quarterly
Cyanuric acid (mg/L) 0 30 50 Monthly2 Biweekly3
Temperature (°F)— pools 70 78–82 104 Twice a day
Temperature (°F)— spas 70 Personal preference 104 Every 2 hrs 1Aquatic venues include pools, spas, and aquatic play features.
2Pools adding cyanuric acid 3Pools using stabilized chlorine as the primary disinfectant
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