Hoover Signing
The Water Bank played an important role in DCP by assisting the state with both the mitigation and offset components of the Arizona DCP Implementation Plan. The AWBA participated in several agreements, some of which required statutory changes and the adoption of policy.(photo credit: Bureau of Reclamation)
Tribal firming program
The Arizona Water Banking Authority is the agent for the State for meeting the State's obligations under the Arizona Water Settlements Act (AWSA) of 2004. Under the AWSA, the Water Bank has an obligation to firm NIA Priority CAP water, which due to its priority, will be the first supplies requiring AWBA firming during a shortage.(photo credit: Virginia O'Connell)
AWBA Credits Map
This new interactive GIS map allows you to see a map of Arizona and locate the storage facilities within the Phoenix, Pinal and Tucson AMAs where the Water Bank has stored water. Click on the facility to see an inventory of AWBA credits.
Water Storage in the Superstition Mountain Recharge Project
The AWBA holds water storage permits at a number of water storage facilities in the Phoenix, Pinal and Tucson AMAs. Water is delivered to underground storage facilities (USFs) for direct recharge, as well as groundwater savings facilities (GSFs) for indirect recharge. 
(Superstitions Mountains Recharge Project, photo credit: CAP)

The Arizona Water Banking Authority

The Arizona Water Banking Authority (AWBA; Water Bank) was established in 1996 to store the unused portion of Arizona’s annual Colorado River entitlement in Central and Southern Arizona. The AWBA stores water in underground aquifers to earn long-term storage credits (LTSCs). These credits can be recovered (pumped) during a shortage to provide back-up water supplies (known as "firming") for Arizona water users.

Through 2020, the AWBA has accrued 4,360,000 acre-feet of LTSCs: 3,750,000 acre-feet for Arizona uses and 613,846 acre-feet on behalf of the State of Nevada. The AWBA firms water supplies for Central Arizona Project municipal and industrial subcontract holders and communities along the Colorado River. As the agent for the State, the AWBA is responsible for meeting the State's Tribal firming obligations under the Arizona Water Settlements Act of 2004. The AWBA also assists with meeting the State's water management objectives under the Groundwater Code and provides the mechanism for interstate water banking with the other Lower Basin States. By storing water, the AWBA helps to ensure long-term water supplies for Arizona and neighboring states.


About Us


Plan of Operation 2023

2023 Plan of Operation

In 2023, the Colorado River will operate under a Lower Basin Tier 2a shortage condition, which effectively reduces Arizona's Colorado River entitlement by 592,000 acre-feet. Accordingly, there will be no excess CAP water available to the AWBA for storage.

While significant, the reductions in


2022 Annual Report

The AWBA is pleased to share its 2022 Annual Report.  The Annual Report details the AWBA’s activities for calendar year 2022 and the progress made on achieving its goals and obligations including commitments made in support of Arizona’s plan for implementing the Lower Basin Drought Contingency Plan


AWBA Stakeholder Process

On April 11th and May 2nd, 2023 the AWBA held two stakeholder meetings to discuss the distribution of AWBA long-term storage credits for firming Central Arizona Project municipal and industrial subcontract supplies.  

Materials from May 2, 2023 stakeholder meeting

Materials from April 11, 2023




The next quarterly meeting of the Arizona Water Banking Authority Commission has been scheduled for Wednesday, December 6, 2023 - 10:00 a.m. - 12:00 p.m.

This meeting will be held both in-person and via webinar with login details posted 24 hours prior to the meeting.

Map to Offices

Pursuant to A.R.S. § 38-431.02(A)(1), all public notices of meetings of the AWBA Commission and any of its subcommittees will be physically posted at the Arizona Department of Water Resources, 1110 W. Washington St., Phoenix, Arizona, near the elevators on the first floor, which is open to the public Monday through Friday, 8:00 a.m. to 5:00 p.m., except legal holidays. AWBA Commission meetings will also be electronically posted to this website under Meetings.


Hoover Dam

The Arizona Water Banking Authority coordinates with ADWR and CAWCD, working cooperatively to ensure recovery implementation is achievable when needed.

AWBA Credits Map

This interactive GIS map allows you to view AWBA credits at each storage facility and download the full data into excel.

Colorado River running through the Grand Canyon

The Water Bank was created in 1996 to store the unused portion of Arizona's Colorado River entitlement.