Annual Snapshot

WATER ACCOUNTING SYSTEM / ANNUAL SNAPSHOT

Water Accounting Dashboard

Just like a financial account, the Sacramento Regional Water Bank tracks water deposits, withdrawals, balances, and opther accounting adjustments. Explore Water Bank account balances, annual account activity, and participating water supplier accounts through the Water Accounting System.

01 / Current Account Balance

How much water is currently stored

The Water Bank now contains 519,300 acre-feet of stored water, helping strengthen the region’s water supply reliability during future dry periods.

WATER CURRENTLY STORED

519,300 AF

+39,600 AF net change this water year

274,600 AF

North American Subbasin

View North American Subbasin map ↗

244,700 AF

South American Subbasin

View South American Subbasin map ↗

02 / WATER YEAR 2025 AT A GLANCE

How did storage change this year?

During Water Year 2025, participating water suppliers deposited more water than they withdrew, increasing the Water Bank by 39,600 acre-feet enough water to supply approximately 118,000 households for one year. The Water Bank now contains 519,300 acree-feet of stored water.

WHAT IS A WATER YEAR?

California’s water year runs from October 1 through September 30. It is used to track precipitation, runoff, and water supplies over a complete wet season.

NET CHANGE THIS YEAR

+39,600 AF

Increase in stored water

DEPOSITED BY SUPPLIERS

74,200 AF

Annual groundwater recharge

HOUSEHOLDS SUPPLIED

118,000

For one year · approximate

WHAT IS AN ACRE-FOOT?

An acre-foot is enough water to cover one acre of land one foot deep—about 326,000 gallons. It is a common unit used for water supplies, representing enough water to supply about three households for one year.

03 / WATER YEAR 2025 ACCOUNTING

How was banked water used this year?

Participating agencies deposited 74,200 acre-feet of water into the Water Bank during Water Year 2025. After accounting for natural groundwater movement that supports nearby rivers and groundwater systems, the Water Bank grew by 39,600 acre-feet.

Annual account statement	Water year 2025
Starting balance	479,700 AF
Deposits Water credited through recharge	+74,200 AF
Withdrawals Banked water recovered	0 AF
Contributions to rivers and groundwater Accounting adjustment for water leaving storage	–34,600 AF
Required reserve (leave-behind) Shown separately under the accounting framework	0 AF
Ending balance	519,300 AF

Net change: +39,600 acre-feet (+8.3%)

Contributions support rivers and groundwater; required reserves help protect long-term reliability.

WHY DOESN’T ALL OF THE STORED WATER REMAIN IN THE WATER BANK?

A small portion of stored groundwater naturally moves through the aquifer, supporting nearby rivers and groundwater systems. The Water Accounting System tracks these contributions to help ensure Water Bank balances remain accurate and transparent.

WHAT IS A LEAVE-BEHIND REQUIREMENT?

When water is withdrawn from the Water Bank, a portion of that water is required to remain in the aquifer to support the long-term sustainability of the Water Bank. Because no water was withdrawn during Water Year 2025, no leave-behind requirement was applied.

04 / ACCOUNT HISTORY

How has the Water Bank account changed over time?

The Water Bank has grown since the 2024 Starting Water Bank Balance was established. Beginning with Water Year 2025, the chart will expand each year to show how the Water Bank changes over time.

Starting and ending balances since accounting began.

479,700

2024 starting

519,300

2025 ending

+8.3% change in stored water

Additional years will be added as annual Water Accounting System updates are completed, creating a year-by-year record of the Water Bank over time.

WHY DOES THE CHART BEGIN WITH 2024?

The 2024 Starting Water Bank Balance represents water that had already been stored in the Water Bank before implementation of the Water Accounting System.

05 / WATER SUPPLIER ACCOUNTS

How much water has each water supplier stored?

The Water Bank has grown since the 2024 Starting Water Bank Balance was established. Beginning with Water Year 2025, the chart will expand each year to show how the Water Bank changes over time.

SELECT A WATER SUPPLIER

Sacramento Suburban Water District ▼

Sacramento Suburban Water District

North American Subbasin · Water Year 2025

CURRENT WATER BANK BALANCE

112,400 AF

WATER DEPOSITED

15,300 AF

WATER WITHDRAWN

0 AF

RIVERS & GROUNDWATER

5,300 AF

ANNUAL NET CHANGE

+10,000 AF

SHARE OF REGIONAL ACCOUNT

21.6%

Every account uses the same Water Accounting System rules. Account balances reflect historical deposits and withdrawals over time, including annual supplier activity.

WHY DOES EACH WATER SUPPLIER HAVE ITS OWN ACCOUNT?

Each participating water supplier deposits and withdraws water at different times based on its water supply needs and available supplies. Individual Water Bank accounts provide a transparent record of each supplier’s water while using the same Water Accounting System to calculate deposits, withdrawals, and account balances.

06 / DATA UPDATES

When is this dashboard updated?

The dashboard is updated once each year after participating water suppliers submit and verify operational data for the completed water year.

CURRENT VERSION

Water Year 2025

LAST UPDATED

January 1, 2026

NEXT SCHEDULED UPDATE

January 1, 2027

Water Year 2026

WHY IS THIS DASHBOARD UPDATED ONLY ONCE EACH YEAR?

The Water Accounting System tracks groundwater activity for a full water year. The dashboard represents an annual accounting after suppliers verify their operational data for the completed year, providing a consistent and reliable accounting record.