Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 653 - DESIGN, OPERATION AND MAINTENANCE CRITERIA
Subpart F - CHLORINATION
Section 653.603 - Minimum Contact Time
Universal Citation: 35 IL Admin Code ยง 653.603
Current through Register Vol. 48, No. 38, September 20, 2024
a) A minimum chlorine contact time of 60 minutes shall be provided for all surface water supplies and for ground water supplies using surface water-type treatment, springs or infiltration lines, or water obtained from creviced rock aquifers with less than 50 feet of cover.
b) Contact time is measured as the time following filtration of surface or ground water, or chlorination of well water when there is no other treatment, and the time when the water reaches the first user.
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