Environment (Drinking Water)

Senate Bill 475 establishes rules for West Virginia state agencies regulating "chemicals of emerging concern" (like PFAS, microplastics, and nanomaterials). It prevents state rules from being stricter than existing federal standards for these chemicals, and requires any new state rules (where no federal standard exists) to be based on "best available science" and "weight of scientific evidence." The bill defines key terms like "best available science" to ensure regulations rely on reliable, peer-reviewed studies showing a direct link between chemical exposure and actual health harm. This directly affects state environmental and health agencies responsible for setting limits on water quality, air pollution, and hazardous materials.

HB 4949 establishes rules for West Virginia's regulation of "chemicals of emerging concern," including PFAS (like PFOS/PFOA), microplastics, nanomaterials, and other substances posing potential environmental or health risks. The bill prohibits state rules on these chemicals from being stricter than existing federal standards for the same topic. If no federal rule exists, state regulations must be based on "best available science" and the "weight of scientific evidence," requiring a direct link between chemical exposure and proven human harm (not just risk). This applies to areas like drinking water, air quality, hazardous waste, and contaminated site cleanup, affecting state agencies developing environmental regulations.