Phoenix joins Secure Water Arizona Program (SWAP): what it means for future Colorado River water shortages

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Phoenix City Council has approved the Secure Water Arizona Program (SWAP), a voluntary water-sharing framework designed to help Arizona cities manage potential Colorado River shortages—working in partnership with Tucson.

In the city’s authorization packet, Phoenix ties early implementation planning to the federal timeline for Post-2026 Colorado River Operating Guidelines effective January 1, 2027. That means the practical “what happens next” is largely about preparation and coordination—not an immediate change in everyday water service.

What Phoenix approved (the decision in the official record) i

Phoenix’s packet seeks authority for the city manager (or designee) to enter into “Aid Agreements”—mutual-aid style agreements—with partner entities including Tucson and the Town of Cave Creek, plus Central Arizona Water Conservation District (CAWCD) and other relevant Arizona/federal entities and Colorado River/Central Arizona Project entitlement holders.

The packet also asks for authority to execute related “Transactional Agreements” designed to advance the objectives of the Aid Agreements, while still noting these agreements are structured for later completion subject to additional required approvals.

And Phoenix included a city-code exception to allow specific indemnification and liability language in transaction-related documents that would otherwise be restricted under Phoenix City Code.

SWAP in plain terms: voluntary sharing, not a new water supply i

Public reporting describes SWAP as completely voluntary and built around multiple parts:

• An emergency reserve: described as a small amount that could be made available on a very short-term basis to create “runway” while a longer-term plan is developed.
• Longer-term mechanisms: including an “offset reduction” approach and a structure intended to connect willing buyers with willing sellers—positioned as hands off and intended to keep transactions occurring at the user-to-user level.

The key takeaway for residents: SWAP is meant to reduce regional risk and improve readiness if cutbacks occur. It is not a guarantee that Phoenix will automatically receive extra water on a predictable schedule in any specific shortage scenario.

What Phoenix residents should realistically expect next i

Because what Phoenix approved is a framework for agreements and readiness, residents should expect planning and coordination first—followed by details on how the program’s early components will operate.

City materials also emphasize that Phoenix is already using a phased drought-management approach that prioritizes public awareness and conservation. As that plan evolves, residents and businesses may see conservation actions expand if conditions worsen.

So for most households and local businesses, the near-term changes tied to SWAP are likely to feel like more coordination and messaging, not like a new water source turning on.

What to watch next i

• Follow-up approvals for the finalized transactional agreements referenced in the authorization packet.
• More specifics on “initial portions” of the program—what will be ready first, and how the emergency reserve and other mechanisms are expected to work as the January 1, 2027 federal timeline approaches.

Bottom line: SWAP is one risk-management tool in Phoenix’s broader Colorado River planning—built to support voluntary cooperation with other cities, while conservation and long-term reliability planning remain central.

Sources

• Phoenix Legistar: Secure Water Arizona Program (SWAP) authorization (agenda packet/official materials)
• KJZZ: Phoenix approves water share program (SWAP) to help Arizona weather Colorado River shortages
• City of Phoenix newsroom: Update on water resources/drought (SWAP background)

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