Bay Area regulators have pushed back the region’s first-in-the-nation phaseout of gas water heaters by a full year and agreed to let as many as half of property owners sidestep the switch to electric models altogether, a decision that highlights California’s increasingly cautious approach to cutting pollution from home appliances.
The Bay Area Air Quality Management District board voted 16-1 Wednesday to approve the changes, which delay the rule’s start date to January 2028 and carve out broad new exemptions for homeowners and landlords. The original rule, passed in 2023, never required anyone to swap out a working gas water heater. But once it takes effect, most people replacing a gas unit will need to install a zero-emission model — typically an electric heat pump — instead.
That requirement now comes with significant caveats. Low-income residents, those already burdened by high housing costs, and homeowners whose properties lack the space or electrical capacity for a heat pump can apply to keep installing gas units.
The move reflects a broader retreat across California on appliance emissions rules, which target one of the largest sources of smog-forming pollution in homes. Last year, Southern California’s air quality agency abandoned a similar plan to phase out gas water heaters and furnaces, and the California Air Resources Board has stepped back from an earlier goal of requiring all new space and water heaters sold statewide to produce zero emissions by 2030.
Supporters of the Bay Area’s approach argue the region is taking a more deliberate path. The district built in time to study the rule’s effects before implementation, and SPUR, a Bay Area planning and policy nonprofit, says the new exemptions largely mirror what environmental advocates had proposed to ease the burden on property owners — even if they go further than some would like.
District staff estimate the rule, as amended, could still prevent up to 16 premature deaths and 21 new asthma cases each year, while avoiding roughly $90 million in healthcare costs. But those same staff acknowledge the exemptions could cut the rule’s original projected pollution reductions roughly in half.
Cost remains a central issue. Installing a heat pump water heater runs about $3,500 more than a comparable gas unit, according to the air district. While heat pumps use far less energy than gas models, California’s relatively high electricity prices mean the savings on utility bills don’t fully offset the higher upfront cost.
Property owner groups argue the rule, even in its softened form, will strain finances. Joshua Howard, executive vice president of local public affairs for the California Apartment Association, said the policy fails to account for the realities of older multi-unit buildings common throughout the Bay Area, many dating to the 1960s and ’70s or earlier.
Board members were divided on the issue. San Mateo County Supervisor Ray Mueller said he would have preferred scrapping the rule entirely, while San Francisco County Supervisor Shamann Walton voted no, citing affordability concerns. Benicia Mayor Steve Young abstained from the vote.
Contra Costa County Supervisor John Gioia, who supported the delay, said the amendments strike a necessary balance. “We need to do this in a way that respects that lower-income residents may not be able to afford it. We need to figure out how to help them,” Gioia said. “And let’s face it, the exemptions are big enough to drive a truck through.”
Under the revised rule, households earning at or below 80% of the area median income, or enrolled in assistance programs like Medi-Cal or CalFresh, can continue installing gas water heaters. The same goes for homeowners whose mortgage and property tax payments consume at least 28% of their gross income. District estimates suggest about 20% of Bay Area households would qualify under those income-based exemptions.
Another 20% of installations are expected to qualify for a one-time exemption due to physical limitations, such as cramped utility closets, low ceilings or electrical panels too small to support a heat pump. Smaller water heaters of 30 gallons or less — about 10% of all sales — remain exempt indefinitely because no zero-emission versions of that size are currently sold in the United States. Larger units commonly used in apartment complexes and commercial buildings now have until 2033 to comply, two years later than originally planned.
The shift mirrors a statewide retreat from aggressive appliance emissions targets. The California Air Resources Board, which once envisioned all new space and water heaters sold in the state reaching zero emissions by 2030, floated a scaled-back alternative at a December 2025 workshop: capping gas water heater sales and allowing manufacturers to earn credits for a more gradual transition. Agency spokesperson Lindsay Buckley said the board continues to gather feedback and weigh possible changes.
Despite the state’s own hesitance, officials voiced support for the Bay Area’s rule, with one state letter to the board noting it “contributes to California’s broader strategy to reduce building-sector emissions while delivering public health, clean air, environmental justice, and climate benefits.”
The contrast with Southern California is notable. The South Coast Air Quality Management District proposed its own rules last year that would have required manufacturers to gradually increase sales of zero-emission appliances, backed by fees on gas models — but the agency abandoned the plan amid pressure from the Trump administration.
That makes the Bay Area’s rule, watered down as it is, stand out as one of the few remaining efforts of its kind in the state. “The state and the Bay Area are doing a great job of trying to push things forward in a more challenging environment,” said Tony Sirna, deputy policy director at Evergreen Action. “We’re pedaling just as hard, but we’re facing headwinds, and so we are making slower progress than we would have otherwise.”
The financial stakes are substantial. The air district estimates up to 120,000 Bay Area households replace a water heater annually, and a consultant hired by the district projected the amended rule will cost those households roughly $372.8 million a year collectively, even after factoring in about $60.8 million in energy savings. Howard said the district “needs to recognize the true cost of the mandate.”
Adam Pearce, president of the California Rental Housing Association, said the changes don’t resolve landlords’ underlying concerns and simply delay the reckoning. “We’re not against clean air and healthy living. Certainly providing quality housing coincides with all of that,” Pearce said, adding that incentives, not mandates, would generate more cooperation from property owners over time.
Advocates counter that financial incentives are already part of the equation. SPUR estimates the Bay Area will receive roughly $55 million annually in heat pump incentive funding over the next several years. Sam Fishman, a policy manager with the organization, said the rule itself sends an important signal to the marketplace.
“These rules are a really big deal,” Fishman said. “They are a strong market signal that can ramp up demand for heat pumps in California, show that they work, and build demand both from consumers, from contractors, from manufacturers at every level of the supply chain.”
Original source: CalMatters
