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Contact Region 9

Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

Pretreatment Program

Note: EPA no longer updates this information, but it may be useful as a reference or resource. Latest information is available at EPA's National Pretreatment Program site.

Pretreatment Quick Finder
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Program Implementation


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This page contains information concerning regulatory requirements and guidance useful to municipalities and dischargers in complying with pretreatment requirements, and in the implementation of the pretreatment program.

Local Limits

Municipalities develop and enforce local limits to:

  • Ensure their municipal wastewater treatment plants comply with environmental standards
  • Safeguard worker health and safety
  • Protect wastewater collection and treatment physical assests including collection pipes and pump stations

Local limits reflect site-specific conditions including the number and types of industry, businesses and other non-domestic sources in a municipality's service area.

Contact Information
Pretreatment Contacts

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