Water Rates
Understanding Your Water Rates
Zone 7 is committed to providing safe and reliable water to our customers at a reasonable price.
We set water rates each year that allow us to take a proactive approach to protecting our water system, preparing for emergencies, replacing and upgrading equipment, and preventing system breakdowns in order to avoid service disruptions and increased costs for our customers.
How does Zone 7 set water rates?
To better understand your water rates, it helps to understand where your Zone 7 water comes from.
Approximately 70 percent of Zone 7’s water supply starts as snowmelt in the Sierra Nevada Mountains and is imported more than 100 miles to the Tri-Valley from the State Water Project through the Delta and South Bay Aqueducts.
Once that imported water arrives to the Tri-Valley, Zone 7 either stores it in the local groundwater basin for future or emergency use, or treats the water for delivery to four local water agencies – the City of Pleasanton, the City of Livermore, Dublin-San Ramon Services District or the California Water Service Company – that each then deliver it to customers as drinking water. These agencies are responsible for delivering the water to customers and sending water bills.
Water Service Rate Documentation
Treated WateR
Treated Water Service Rates for Calendar Years: 2023 - 2026
On November 16, 2022, via Resolution No. 22-93, the Zone 7 Board of Directors adopted a four-year rate schedule for treated water rates covering calendar years 2023, 2024, 2025, and 2026. The resolution established 5.5% annual rate revenue adjustments and directed the Board to review the adopted rates for calendar years 2025 and 2026 through a public process, with any changes approved by November 2024.
In October 2024, the Board reviewed the rates for calendar years 2025 and 2026 and concluded they were sufficient to meet the Agency’s planned revenue requirements. As a result, no adjustments were made.
Treated Water Service Rates for Calendar Years: 2019 – 2022
Following a public rate-setting process, the Board of Directors in a 4-3 vote approved a water rate increase for calendar years 2019 through 2022, subject to the Board revisiting the rates after two years. The overall annual increase is 6.7% per year. In 2020, the Board voted to postpone the scheduled rate increase.
Board Resolution No. 20-37
Board Resolution No. 18-74
Staff Report – Treated Water Rates
Treated Water Service Rates for Calendar Years 2017 – 2018
Board Resolution No. 16-172
Staff Report – Treated Water Rates
Rate Studies
Final Report (November 2022)
Final Report (October 2018) – Includes Untreated Water Rate Study
Final Report (October 2016)
Final Report (October 2015)
Untreated Water
Untreated Water Service Rates for CY
2025
On October 16, 2024, following meaningful input from untreated water customers, the Board decided to maintain the untreated water rate of $263 per acre-foot for calendar year 2025. This rate, established by Resolution No. 24-83, will take effect on January 1, 2025, and complies with the Board’s principles for untreated water rates.
Board Resolution No. 24-83
Staff Report – Untreated Water Rates
Final Report
Untreated Water Service Rates for CY 2024
The untreated water rate update for calendar year 2024 is consistent with the Board principles for untreated water rates adopted via Resolution No. 21-77 in 2021. The process included discussions with the Zone 7 Finance Committee and untreated water customers. On October 18, 2023, the Board adopted a rate of $263 per acre-foot for CY 2024, following meaningful input from untreated water customers.
Untreated Water Service Rates for CY 2023
To determine the untreated water rate for calendar year 2023, Zone 7 contracted with Raftelis to conduct an untreated water rates study, incorporating the rate components approved by the Board in 2021. The process included discussions with the Zone 7 Finance Committee and untreated water customers. On October 19, 2022 the Board adopted a rate of $255 per acre-foot for CY 2023, following meaningful input from untreated water customers.
Board Resolution No. 22-85
Staff Report - Untreated Water Rates
Final Report
Untreated Water Service Rates for CY 2022
To determine the untreated water rate for calendar year 2022, Zone 7 contracted with Raftelis Financial Consultants, Inc. (Raftelis) to conduct a cost of service study for untreated water service. The process included discussions with untreated water customers, a workshop with the Zone 7 Board to determine the rate components, and the Zone 7 Finance Committee. On October 20, 2021 the Board adopted a rate of $204 per acre-foot for CY 2022.
Board Resolution No. 21-77
Staff Report - Untreated Water Rates
Final Report
Untreated Water Service Rates for CY 2020
Board Resolution No. 19-84
Staff Report – Untreated Water Rates
Final Report
Untreated Water Service Rates for CY 2019
Untreated Water Rates for CY 2018
Board Resolution No. 17-83
Staff Report – Untreated Water Rates
Untreated Water Rates for CY 2017
Board Resolution No. 16-171
Staff Report – Untreated Water Rates
Untreated Water Stakeholders Engagement Workshop #1 May 6, 2021
Untreated Water Stakeholders Engagement Workshop #2 Sept. 14, 2021
