Ill. Admin. Code tit. 35 § 364.301

Current through Register Vol. 48, No. 50, December 13, 2024

Section 364.301 - Formula for the Segment Ranking Index

a) The Segment Ranking Index (SRI) is an objective determination of the priority of segments through the use of four factors which are expressed as numerical factors and combined to establish a ranking index for each of the basin segments.

b) The SRI is calculated as follows

SRI = Water Quality Index (WQI) x High Quality Water Factor x Population Factor x National Priorities Factor

Ill. Admin. Code tit. 35, § 364.301