Section 304.122  Total Ammonia Nitrogen (as N:  STORET number 00610)

a)         No effluent from any source which discharges to the Illinois River, the Des Plaines River downstream of its confluence with the Chicago River System or the Calumet River System, and whose untreated waste load is 50,000 or more population equivalents shall contain more than 2.5 mg/L of total ammonia nitrogen as N during the months of April through October, or 4 mg/L at other times.

b)         Sources discharging to any of the above waters and whose untreated waste load cannot be computed on a population equivalent basis comparable to that used for municipal waste treatment plants and whose total ammonia nitrogen as N discharge exceeds 45.4 kg/day (100 pounds per day) shall not discharge an effluent of more than 3.0 mg/L of total ammonia nitrogen as N.

c)         In addition to the effluent standards set forth in subsections (a) and (b) of this Section, all sources are subject to Section 304.105 .

            (Source:  Amended at 26 Ill. Reg. 16948, effective November 08, 2002)