San Diego Mandated to Adopt Uniform Water Rates

The city will move to uniform rates in 2027, increasing costs for low-volume users by 7.1 percent.

Updated on Oct. 7, 2026 in Utilities

Isometric editorial illustration of a brass industrial water valve on a pipe, representing municipal water infrastructure. — San Diego will shift to a uniform water rate structure starting January 1, 2027, following appellate court rulings and state legislative changes. AI Illustration. Upload story photo >

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Should your local water utility prioritize tiered pricing to reward conservation over uniform rates?

Following an appellate court ruling and state legislative action, San Diego is set to shift to uniform water rates on January 1, 2027. This change affects local single-family homeowners and businesses currently navigating settlement processes from a decade-long class action lawsuit.

Why it matters

The shift away from tiered pricing comes after an appellate court found previous structures legally unjustified, forcing a shift in how the city recovers its costs. This move alters the long-standing pricing model that incentivized conservation, creating new cost pressures for low-volume residential and commercial accounts.

San Diego will implement a 14% overall rate hike effective January 1, with costs for low-volume single-family homes rising by 7.1%. The city is also finalizing a $40 million settlement payout to plaintiffs following a class action lawsuit that began in 2015.

The players

Gavin Newsom

The Governor of California who signed AB 2180 to provide a new legal framework for how water agencies justify tiered rate structures.

San Diego City Council

The local governing body responsible for setting municipal utility rates and managing the transition to the uniform water rate structure.

The details

The city council was forced to restructure its pricing after an appellate court ruled its previous tiered model lacked sufficient legal justification. While Governor Gavin Newsom signed AB 2180 to allow agencies to set tiered rates based on property characteristics, the current legal requirement mandates that San Diego switch to a uniform structure by January 1. The city is currently managing the final stages of a class action settlement, with residents and businesses having until November 12 to opt out or object.

2015: Class action lawsuit initiated against the City of San Diego.
September 27, 2026: Governor Gavin Newsom signed AB 2180 into law.
October 27, 2026: San Diego City Council scheduled to vote on uniform water rates.
November 12, 2026: Deadline for class action settlement objections or opt-outs.
January 1, 2027: City of San Diego mandates switch to uniform water rates.

Market Landscape

The transition to uniform pricing represents a departure from conservation-focused tiered rates that have faced increasing scrutiny in California courts. The implementation of Assembly Bill 2180 provides a future path for agencies to return to tiered models, though the city remains in transition.

Operators in San Diego should prepare for a 14% aggregate increase in water costs starting in January. Review your utility consumption patterns and budget for the 7.1% price hike if your operations currently benefit from low-volume status.

The takeaway

The move to uniform rates reflects the high cost of legal compliance following years of litigation over utility fee structures. Owners should monitor upcoming council sessions for details on the potential for future tiered rate designs allowed under the new state framework.