Understanding the Infrastructure Improvement Plan and rate review process
Cal Water’s rates are set by an independent, third party, state agency—the California Public Utilities Commission (CPUC)—with input from the public. We are required to file a new application every three years, so that rates reflect the actual cost of operating, maintaining, and upgrading our water system to provide safe, clean, reliable drinking water to our customers.
How Your Water Rates Are Set
Every three years, California Water Service (Cal Water) works with the California Public Utilities Commission (CPUC), an independent third-party state agency, to review and set our rates so they reflect the current cost of serving our customers. This process, which typically takes 18 months or longer, involves a thorough review of infrastructure improvement projects (such as water pipes, fire hydrants, water treatment facilities, and more) across all Cal Water services areas that will enable us to continue providing safe, clean, and reliable drinking water.
How it Happens
Cal Water reviews planned infrastructure improvements and submits an application to the CPUC.
An independent public advocate analyzes Cal Water’s plan and makes its own recommendation.
The CPUC hosts public hearings to receive input from Cal Water customers.
The CPUC holds a formal hearing on the recommendations.
A CPUC administrative law judge issues a proposed decision.
The CPUC commissioners vote on the proposed decision, with new rates typically going into effect soon after.
In Your District
Cal Water has localized Infrastructure Improvement Plans for each service area. View your districts Infrastructure Improvement Plans.
Discover Infrastructure Plan
Public Hearings
The CPUC will hold public participation hearings that serve as your opportunity for public input. Find upcoming, scheduled hearings.
Find Hearing Details and Schedule
Previous IIP
Cal Water has invested more in infrastructure upgrades in the last decade than any other regulated water provider in California.
Previous IIP