JUL-19 JUL-20 JUL-21 JUL-22 JUL-23 JUL-24 JUL-25
ELS Zone (1)              
Total Hardness (mg/L as CaCO3) (2) 172 169 173 172 170 168 170
pH (pH) (3) 7.6 7.6 7.6 7.6 7.6 7.6 7.6
Temperature (°C) -- -- -- -- -- -- --
Total Chlorine Residual (mg/L) (4) 2.09 2.11 2.08 2.08 2.10 2.10 2.09
Alkalinity (mg/L as CaCO3) (5) 113 114 119 115 111 115 119
Conductivity (µS/cm) (6) 427 423 446 462 440 430 422
Caustic Soda (mg/L) (7) 20.0 20.1 29.6 29.4 22.6 18.6 16.0