Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 302 - WATER QUALITY STANDARDS
Subpart B - GENERAL USE WATER QUALITY STANDARDS
Section 302.205 - Phosphorus

Phosphorus: After December 31, 1983, Phosphorus as P must not exceed 0.05 milligram per liter (mg/L) in any reservoir or lake with a surface area of 8.1 hectares (20 acres) or more, or in any stream at the point where it enters that reservoir or lake. For this Section, the term "reservoir or lake" does not include low-level pools constructed in free-flowing streams or any body of water that is an integral part of an operation that includes the application of sludge on land. Point source discharges which comply with 35 Ill. Adm. Code 304.123 must comply with this Section for purposes of 35 Ill. Adm. Code 304.105.