Ill. Admin. Code tit. 35, § 364.301 – Formula for the Segment Ranking Index | Midpage
§ 364.301
Ill. Admin. Code tit. 35, § 364.301
Formula for the Segment Ranking Index
AUTHORITY: Implementing and authorized by Section 4 of the Anti-Pollution Bond Act (Ill. Rev. Stat. 1983, ch. 127, par. 454) and Section 4 of the Environmental Protection Act (Ill. Rev. Stat. 1983, ch. 111½, par. 1004).ENVIRONMENTAL PROTECTION AGENCY
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