MAY-06 MAY-07 MAY-08 MAY-09 MAY-10 MAY-11 MAY-12
ELS Zone (1)              
Total Hardness (mg/L as CaCO3) (2) 178 175 178 177 181 178 --
pH (pH) (3) 7.7 7.8 7.8 7.8 7.8 7.8 7.8
Temperature (°C) -- -- -- -- -- -- --
Total Chlorine Residual (mg/L) (4) 1.96 1.94 1.03 1.93 1.93 1.97 1.96
Alkalinity (mg/L as CaCO3) (5) 118 117 116 118 116 121 114
Conductivity (µS/cm) (6) 406 402 232 400 400 397 393
Caustic Soda (mg/L) (7) 7.49 6.69 6.31 5.77 5.51 4.25 3.57