H CT Values (mg·min/l) for Cryptosporidium Inactivation by Chlorine Dioxide

Section 611.TABLE H   CT Values (mg·min/ℓ) for Cryptosporidium Inactivation by Chlorine Dioxide Log Credit Water Temperature (°C) ≤ 0.5 1 2 3 5 7 10 15 20 25 30 0.25 159 153 140 128 107 90 69 45 29 19 12 0.5 319 305 279 256 214 180 138 89 58 38 24 1.0 637 610 558 511 429 360 277 179 116 75 49 1.5 956 915 838 767 643 539 415 268 174 113 73 2.0 1275 1220 1117 1023 858 719 553 357 232 150 98 2.5 1594 1525 1396 1278 1072 899 691 447 289 188 122 3.0 1912 1830 1675 1534 1286 1079 830 536 347 226 147 A supplier may use the following equation to determine log credit between the indicated values: Log credit = (0.001506 ´ (1.09116) Temp(in °C) ) ´ CT BOARD NOTE:  Derived from the table at 40 CFR 141.720(b)(1) (2012).