APR-20 APR-21 APR-22 APR-23 APR-24 APR-25 APR-26
ELS Zone (1)              
Total Hardness (mg/L as CaCO3) (2) 159 162 162 161 158 164 --
pH (pH) (3) 7.8 7.8 7.8 7.8 7.8 7.9 7.9
Temperature (°C) -- -- -- -- -- -- --
Total Chlorine Residual (mg/L) (4) 1.96 1.97 1.97 1.99 2.08 2.03 1.98
Alkalinity (mg/L as CaCO3) (5) 110 114 109 109 107 107 113
Conductivity (µS/cm) (6) 356 360 364 359 185 377 381
Caustic Soda (mg/L) (7) 7.49 7.84 8.38 8.97 11.3 9.79 7.83