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NPDES Permits and Stormwater
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National Links
NPDES Permit Guidance
CWA Requirements for Construction Projects in Indian Country
- Factsheet: Clean Water Act Requirements for Construction Projects in Indian Country (PDF) (2 pp, 66K, About PDF)
EPA Pacific Southwest Region draft guidance for permitting NPDES discharges into impaired water bodies in the absence of a TMDL
The following draft guidance interprets the existing federal regulatory requirements concerning NPDES permits and provides additional guidance on requirstate relatedements. After it is completed, the guidance will provide helpful information to assist in development of NPDES permits in Region 9 when Total Maximum Daily Loads (TMDLs) have yet to be developed.
For questions or information concerning the guidance, please call Doug Eberhardt (eberhardt.doug@epa.gov) at (415) 972-3420
- Region 9 Draft Guidance for Permitting NPDES Discharges into Impaired Water Bodies in the Absence of a TMDL (PDF) (15 pp, 109K, About PDF)
EPA Region 9 and 10 Guidance for Implementing Whole Effluent Toxicity Testing Program
U.S. EPA Regions 9 and 10 have jointly developed draft whole effluent toxicity (WET) implementation guidance for NPDES permit writers. This 1996 guidance document provides an introduction to WET implementation in the NPDES permitting program taken from federal NPDES regulations, EPA guidance documents for permit writers, and toxicity test methods manuals. Procedures for evaluating reasonable potential and setting WET permit limits are described with examples; basic toxicity test method statistics and quality assurance are reviewed; and toxicity reduction evaluations are discussed. Sample WET permit language is also provided. This document is not a substitute for EPA, or State or Tribal regulations and policies governing WET.
For more information contact Robyn Stuber (stuber.robyn@epa.gov) or (415) 972-3524
- EPA Region 9 and 10 Guidance for Implementing Whole Effluent Toxicity Testing - May 31, 1996 - Interim Final (PDF) (191 pp., 10.7MB (long download))