(a) Phosphorous loading of the waters of the state is a serious pollution problem affecting water quality in some river basins in the state.
(b) Phosphate detergents contribute significant phosphorous loading to the treated waste water released to the surface waters of the state.
(c) When phosphorous loading becomes a serious pollution problem, federal and state water quality standards may require advanced waste water treatment facilities at public expense, in addition to primary and secondary treatment facilities.
(2) Therefore, the Legislative Assembly declares that it is a policy of this state to reduce phosphorous pollution at its source to maintain existing water quality and to enhance cost-effective waste water treatment where phosphorous pollution becomes a serious pollution problem. [1991 c.764 §2]