JUL-11 JUL-12 JUL-13 JUL-14 JUL-15 JUL-16 JUL-17
ELS Zone (1)              
Total Hardness (mg/L as CaCO3) (2) 172 174 177 173 173 173 169
pH (pH) (3) 7.7 7.6 7.6 7.6 7.7 7.7 7.7
Temperature (°C) -- -- -- -- -- -- --
Total Chlorine Residual (mg/L) (4) 1.95 1.95 1.93 1.93 2.01 1.99 1.96
Alkalinity (mg/L as CaCO3) (5) 115 114 115 115 113 113 113
Conductivity (µS/cm) (6) 400 399 403 402 400 398 398
Caustic Soda (mg/L) (7) 8.81 8.50 7.88 8.01 8.20 8.02 9.44