US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER II: ENVIRONMENTAL PROTECTION AGENCYPart 355 — DETERMINATION OF AMMONIA NITROGEN WATER QUALITY BASED EFFLUENT LIMITS FOR DISCHARGES TO GENERAL USE WATERSSubpart C355.31135 Ill. Adm. Code 355.311Ammonia Nitrogen Decay Equation (Repealed)Last amended: 2003Year: 2026Length: 9 wordsOfficial source Section 355 Section 355.311 Ammonia Nitrogen Decay Equation (Repealed)Previous35 Ill. Adm. Code 355.309Next35 Ill. Adm. Code 355.313