Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 611 - PRIMARY DRINKING WATER STANDARDS
Subpart AG - INTERIM LEAD AND COPPER RULES
Table H - CT Values (mg·min/l) for Cryptosporidium Inactivation by Chlorine Dioxide
Universal Citation: 35 IL Admin Code ยง H
Current through Register Vol. 48, No. 12, March 22, 2024
Log Credit |
Water Temperature (°C) |
||||||||||
[LESS THAN OR EQUAL TO] 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 a ? (1.09116 )Temp(in °C)) a ? CT
BOARD NOTE: Derived from the table at 40 CFR 141.720(b)(1) (2012).
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.