Doug’s post on July 23 provided an excellent summary of Ecology’s webinar outlining its revision process for water quality standards (WQSs). Integral would like to point out a few more details of interest in Ecology’s approach.

Ecology indicated that it will continue to use bioconcentration factors (BCFs), which estimate concentrations in fish tissue based on

Last Tuesday, EPA published its draft of the latest update to the National Recommended Water Quality Criteria for the Protection of Human Health. These recommended criteria are developed under Section 304(a)(1) of the Clean Water Act, and provide guidance to states and tribes that promulgate criteria under delegated programs. Importantly, they are not binding requirements