Section 323.1060. Plant nutrients.

(1) Consistent with Great Lakes protection, phosphorus which is or may readily become available as a plant nutrient shall be controlled from point source discharges to achieve 1 milligram per liter of total phosphorus as a maximum monthly average effluent concentration  unless   other  limits, either  higher  or  lower,  are deemed  necessary and  appropriate  by the department.

(2) In addition to the protection provided under subrule (1) of this rule, nutrients shall be limited to the extent necessary to prevent stimulation of growths of aquatic rooted, attached, suspended, and floating plants, fungi or bacteria which are or may become injurious to  the  designated uses of the surface waters of the state.

History: 1979 AC; 1986 AACS; 2006 AACS.