Modifying the standards for determining water quality pollution.

SB 5896 amends Washington State's water pollution law (RCW 90.48.080) by removing the phrase "or tend to cause" from the definition of unlawful discharges. This change requires that pollution be actual, not merely potential, to violate the law. The bill directly affects businesses, industries, and anyone discharging organic or inorganic matter into state waters. The bill was prefaced in December 2025 and referred to the Environment, Energy & Technology committee for review.