All of Pennsylvania’s streams are periodically assessed by DEP to determine whether the waters are meeting their designated uses. Biannually, DEP publishes the Integrated Water Quality Monitoring and Assessment Report, which includes the 305(b) assessment. Segments which fail to attain their designated uses are then listed on the 303(d) Impaired Waters list and placed on a schedule for DEP to develop a control plan for discharges to the stream, including stormwater runoff, that strives to
bring that stream segment back into compliance. The Integrated 305(b) Assessment and 303(d) Listing is available at:
http://www.depweb.state.pa.us