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Impaired Waters and TMDLs
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Region 3 Approval Documents for 303(d)/Impaired Waters Lists

This page contains approval documents outlining reviews of previous years' Section 303(d) lists and supporting documentation and information.  Region 3 reviews 303(d) list submissions for Delaware, Maryland, Pennsylvania, Virginia, West Virginia and the District of Columbia.

  • Delaware 2014 Section 303(d) List Approval Letter and Decision Rationale (pdf) (October 14, 2015)
  • Delaware 2016 Section 303(d) List Approval and Decision Rationale (pdf) (October 17, 2017)
  • District of Columbia 2014 Section 303(d) List Approval Letter and Decision Rationale (pdf) (January 21, 2015)
  • Maryland 2014 Section 303(d) List Approval Letter and Decision Rationale (pdf) (October 16, 2015)
  • Pennsylvania 2014 Section 303(d) List Approval Letter and Decision Rationale (pdf) (December 19, 2014)
  • Virginia 2012 Section 303(d) List Partial Approval Letter and Decision Rationale (pdf) (December 12, 2013)
  • Virginia 2014 Section 303(d) List Approval and Decision Rationale (pdf) (May 19, 2016)
  • DC 2016 303(d) List Approval Letter and Decision Rationale (pdf) (February 2, 2017)
  • Pennsylvania 2016 Section 303(d) List Approval Letter and Decision Rationale (pdf) (January 9, 2018)
  • Virginia 2016 Section 303(d) List Approval Letter and Decision Rationale (pdf) (March 6, 2018)
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Last updated on February 2, 2021
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