Under the Missouri Clean Water Law, "water contaminant" is defined as any matter or any temperature change which is in or enters any waters of the state. This act removes the temperature change provision from this definition.

This act exempts agricultural stormwater discharges and return flows from irrigated agriculture from clean water permitting requirements, and prevents such discharges and flows from being considered unlawful unless they have entered waters of the state rendering them harmful, detrimental, or injurious to public health, safety, or welfare, or to industrial or agricultural uses, or to wild animals, birds, or fish. Nothing in this act shall supersede current law relating to concentrated animal feeding operations.

This act is substantially similar to a provision contained in HCS/SS/SCS/SB 782 (2018) and HCB 16 (2018).

KAYLA HAHN