- (a) PBCR waterbodies - May 1 through September 30. When the use of a bacterial indicator is determined to be necessary, the following bacterial limitations shall apply from May 1 through September 30 to protect the PBCR beneficial use:
- (1) Escherichia coli (E. coli). When E. coli is the bacterial indicator:
- (A) The monthly geometric mean shall not exceed 126/100 mL.
- (B) The daily maximum for lakes shall not exceed 235/100 mL.
- (C) The daily maximum for all waterbodies other than lakes shall not exceed 406/100 mL.
- (2) Enterococci. When enterococci are the bacterial indicator:
- (A) The monthly geometric mean shall not exceed 33/100 mL.
- (B) The daily maximum for lakes shall not exceed 61/100 mL.
- (C) The daily maximum for all waterbodies other than lakes shall not exceed 108/100 mL.
- (b) PBCR waterbodies - October 1 through April 30. When the use of a bacterial indicator is determined to be necessary, the SBCR bacterial limitations listed in (c) of this Section, shall apply from October 1 through April 30 to protect the PBCR beneficial use when the receiving stream is on the 303(d) List for bacteria.
- (c) SBCR waterbodies. One of the following bacterial limitations and monitoring requirements shall be used year-round for permittees that discharge fecal coliform to waterbodies on the 303(d) list for bacteria:
- (1) Escherichia coli (E. coli). When E. coli is the bacterial indicator:
- (A) The monthly geometric mean shall not exceed 630/100 mL.
- (B) The daily maximum for lakes shall not exceed 1175/100 mL.
- (C) The daily maximum for all waterbodies other than lakes shall not exceed 2030/100 mL.
- (2) Enterococci. When enterococci are the bacterial indicator:
- (A) The monthly geometric mean shall not exceed 165/100 mL.
- (B) The daily maximum for lakes shall not exceed 305/100 mL.
- (C) The daily maximum for all waterbodies other than lakes shall not exceed 540/100 mL.
- (d) Indicators used in WLA. Regardless of which bacterial indicator was used in a permittee's WLA, the permit may contain either of the bacterial indicators listed in (c) of this Section.
- (e) Exception. This Section does not apply to discharging lagoons that were permitted and are being operated in compliance with OAC 252:656-11-2(b), unless Water Quality Standards are violated.
Added at 41 Ok Reg, Number 23, effective 9-15-24