Bookmark and Share syndicationyoutubetwitterfacebook
The Water Emergency Response Organization of Orange County (WEROC), administered by the Municipal Water District of Orange County, supports and promotes countywide emergency preparedness, planning, and response efforts among Orange County water and wastewater utilities.

The Municipal Water District of Orange County and 19 other participating water and wastewater utilities (see full list below) completed an update to the 2012 Draft Orange County Regional Water and Wastewater Multi-Hazard Mitigation Plan and are now in the process of submitting the plan to their respective Boards, Cal EMA, and ultimately to FEMA for approval. Hazard mitigation plans form the foundation for a community's long-term strategy to identify vulnerability to natural and man-made hazards. The plans also aim to reduce disaster losses by breaking the cycle of disaster damage, reconstruction, and repetitive damage. According to the federal Disaster Mitigation Act of 2000, State and local governments are required to develop hazard mitigation plans and update them every five years as a condition for receiving certain types of non-emergency disaster assistance. Public involvement in the update process is very important, and it is, in fact, required. Residents are encouraged to review the plan, provide comments and ask questions.

Questions and comments from the public will continue to be considered for the 2012 update until the plan is approved by all of the approving agencies noted above.  The Municipal Water District of Orange County and the participating utilities encourage residents, businesses, and our coordinating partners to continue to review the plan even once it is finalized, and provide input for the next planned update in 2017. The plan is seen as being a work in progress-with comments and feedback being accepted anytime throughout the 5-year update process.  As the participating agencies continue to work on the document, we will continuously seek recommendations from the public to enhance the process. The 2012 Draft plan is available electronically by accessing the links below. Public comments can be made via e-mail or in person. Those wishing to provide comments electronically can e-mail their comments to

Participating Water and Wastewater Utilites:

  • City of Buena Park
  • El Toro Water District
  • City of Garden Grove
  • City of La Habra
  • Laguna Beach County Water District
  • Mesa Water District
  • Moulton Niguel Water District
  • Municipal Water District of Orange County
  • City of Newport Beach
  • Orange County Sanitation District
  • Orange County Water District
  • City of Orange
  • Serrano Water District
  • Santa Margarita Water District
  • South Orange County Wastewater Authority
  • South Coast Water District
  • Trabuco Canyon Water District
  • City of Tustin
  • City of Westminster
  • Yorba Linda Water District


Plan Documents
PDFTable of Contents and Acronym List
PDFSection 1: Introduction
PDFSection 2: Multi-Jurisdictional Participation
PDFSection 3: Planning Process Documentation
PDFSection 4: Risk Assessment
PDFSection 5: General Overview of Assets, Goals, and Objectives
PDFSection 6: Plan Maintenance
PDFSection 7: References
PDFSection 8: Appendices


For more information about Hazard Mitigation Planning, please view the Hazard Mitigation Planning Fact Sheet or visit