Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 654 - RAW AND FINISHED WATER QUALITY AND QUANTITY
Subpart B - RAW WATER QUANTITY
Section 654.201 - Surface Water Quantity

Universal Citation: 35 IL Admin Code ยง 654.201

Current through Register Vol. 48, No. 38, September 20, 2024

a) Determination of surface water source adequacy shall be based on:

1) catchment areas, stream flows and weather records;

2) safe yield;

3) maximum flood flows;

4) required water releases; and

5) evaporation, seepage and siltation losses.

b) Calculations shall be based on the extreme drought of record, available records of rainfall, consumption maximums and include a surplus for reasonable growth.

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