Our 2024 Infrastructure Improvement Plan (IIP)
Cal Water provides safe, clean, reliable drinking water for everyday and emergency needs, and we’ve been serving local communities for nearly 100 years. This page is designed to share helpful information on our 2024 Infrastructure Improvement Plan (also known as the General Rate Case or GRC, with CPUC proceeding number A.24-07-003).
How Rates Are Set
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 current cost of operating, maintaining, and upgrading our water system to provide safe, clean, reliable drinking water to our customers.
Any changes to customer bills as a result of this Infrastructure Improvement Plan would not occur until January 2026 at the earliest.
Learn More About How Rates Are Set2024 Infrastructure Improvement Plan Priority Areas
Our highest priority is to provide safe, clean, reliable water to our customers. This requires a proactive commitment to infrastructure investment and water quality treatment and testing. These rate adjustments for 2026-2028 will fund critical water infrastructure projects, such as new pipes, treatment facilities, pumps, and fire hydrants, plus improve water supply and storage.
See Improvements Planned for Your AreaFocus on Water Quality
We focus relentlessly on water quality. Our water quality experts conduct more than 500,000 water quality tests per year for more than 300 contaminants in our state-certified, state-of-the-art laboratory. On average, that’s more than 1,000 tests per day.
Making Communities Safer
From improving wildfire protection and emergency preparedness to proactively addressing the impacts of climate change, our ongoing maintenance and upgrades help make our communities safer.
Fixing Small Problems
Our ongoing upgrades and maintenance help prevent small, manageable problems from becoming bigger and more expensive to fix. Even with our strong record of system upgrades, delivery of safe, clean tap water, and commitment to exceptional customer service, our customers pay about a penny per gallon.
Public Participation Hearings
As part of the review process, the CPUC will hold public participation hearings that serve as your opportunity for public input. Find upcoming, scheduled hearings.
Find Hearing Details and Schedule
IIP Resources
Cal Water has invested more in infrastructure upgrades in the last decade than any other regulated water provider in California.
Discover IIP Resources