Triennial Review of the Basin Plan

Section 13240 of the Porter-Cologne and Section 303(c)(1) of the Clean Water Act require a review of basin plans at least once each three-year period to keep pace with changes in regulation, new technologies, policies, and physical changes within the region. The Regional Water Board is responsible for reviewing the Basin Plan, and is required to: 1) identify those portions of the Basin Plan, which are in need of modification or new additions; 2) adopt standards as appropriate; and 3) recognize those portions of the Basin Plan, which are appropriate as written.  The Regional Water Board solicits written and oral public input, which it considers prior to adopting by resolution a prioritized list of basin planning projects.  The highest priority projects establish the workplan of the Regional Water Board’s Planning Program for the next 3 year period.

2018 Triennial Review

A list of all basin planning projects currently under development can be found here.
The 2018 Triennial Review of the Basin Plan was initiated by staff in 2017 and has resulted in a workplan for the Planning Program, which covers a 3-year period (based on the state’s fiscal year schedule) beginning on July 1, 2018 and ending on June 30, 2021.  A staff report and Planning Program Workplan was released for public review for a 45-day review period, during which time a public workshop was also be held.  A public hearing was scheduled, following review of all public comments. The public workshop was held May 17, 2018. The public hearing was held on September 6, 2018. Both of these Board meetings were held in Santa Rosa, CA.

Adopted Documents

Final Proposed Documents for Adoption

Draft Documents for Public Review

Lead staff for the 2018 Triennial Review is Alydda Mangelsdorf, who can be reached at (707) 576-6735 or by email at

2014 Triennial Review

The 2014 Triennial Review of the Basin Plan was adopted by the Regional Water Board in a hearing held on March 12, 2015.

Adopted Documents


  (Page last updated 5/29/19)