The short answer
No. As of October 2026, no rule in force in Santa Cruz County requires you to take out a working gas water heater or furnace, and the state energy code still allows a failed gas water heater to be replaced with a new gas one[10]. Two things get described as a ban. One is the Bay Area air district's appliance rules, which have real dates but do not cover Santa Cruz County. The other is a statewide standard the California Air Resources Board is still drafting. Neither one requires anybody to remove equipment that works.
Below is what each one actually says, what our own air district has done, and what is worth doing if your water heater is getting old anyway.
Where the 2027 and 2029 dates come from
In March 2023 the Bay Area Air Quality Management District amended its Rules 9-4 and 9-6 to set a zero-NOx standard for new water heaters and furnaces installed in its district[4]. Zero-NOx means no nitrogen-oxide emissions from the appliance, which in practice points to electric equipment such as heat pumps. The dates it adopted:
- January 1, 2027: water heaters under about 75,000 BTU per hour, which covers typical household tanks
- January 1, 2029: residential and commercial furnaces
- January 1, 2031: larger water heaters, from about 75,000 BTU per hour up to 2 million
Those dates may move. In October 2026 the district's staff proposed delaying the small water heater date to January 1, 2028 and the larger one to January 1, 2033, with some exemptions, and the district's Board is scheduled to consider the change on November 4, 2026[5][6]. The furnace date is not part of that proposal; the district says it is still evaluating it[6].
Two things matter for a Santa Cruz County homeowner. These are point-of-sale standards for new equipment, not a requirement to replace anything already installed[4]. And they apply only in the Bay Area district, which covers Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo and Santa Clara counties, southwestern Solano and southern Sonoma[7]. Santa Cruz County is not one of them.
What our air district has done
Santa Cruz County is in the Monterey Bay Air Resources District, along with Monterey and San Benito counties. It has no rule like the Bay Area's. None of its current rules sets an emission standard for home water heaters or furnaces; its combustion rules apply to permitted industrial equipment, such as boilers rated at 2 million BTU per hour and up[2]. Its rules page lists no rules under development in its planning division[1].
The Bay Area's rules target nitrogen oxides, which help form ozone and fine-particle pollution[4]. The Monterey Bay region meets both the state and federal ozone standards, according to the district's report on its 2025 air monitoring[3]. Districts can adopt new rules, so if this one proposes an appliance rule, we will update this page.
What the state is proposing for 2030
The 2030 date comes from the California Air Resources Board, which is developing a zero-emission standard for space heaters and water heaters[8]. It is not a law, and it is not yet a regulation. In its FAQ, last updated July 13, 2026, CARB says the regulation has not been finalized and that it has not yet submitted a formal proposal to its Board[8]. Staff have said they expect to take one to the Board in 2026[9].
What CARB has described so far is a limit on manufacturers, not on homeowners. Starting in 2030, each manufacturer would be limited in how many gas-fired space and water heaters it could sell in California each year, with a credit system for flexibility, rather than being cut off entirely[8]. CARB says the rule would not require people to replace working heating equipment, and that existing space and water heaters can still be used and repaired after 2030[8]. Whether propane equipment is included is still to be decided[8].
It covers space heaters and water heaters. Gas cooktops and clothes dryers are not part of it. And because it is still a proposal, the details can change before the Board votes on it.
Local rules
The local rule people most often remember is the City of Santa Cruz's 2020 ban on gas in new buildings. The city suspended enforcement in June 2023, after a federal appeals court struck down Berkeley's similar ordinance, and now uses energy-performance requirements for new buildings instead[11]. It applied to new buildings, not to existing homes.
We are not aware of any rule in Santa Cruz County that requires an existing home to give up gas. New construction is a different question: requirements differ between unincorporated Santa Cruz County and each city, and some have changed since 2023, so ask the building department for the address before you design.
If your water heater is getting old
Nothing here sets a deadline for you. If your gas water heater or furnace works, you can keep it and repair it, and a failed gas water heater can be replaced with a new gas one[10]. That decision is yours. Be wary of anyone, a contractor included, who tells you a law is about to force it.
What is worth doing, if your water heater is old or showing signs of trouble, is finding out now what a heat-pump replacement would need electrically, so the choice is not made in an afternoon after the old one fails. That usually comes down to three things:
- A circuit. Most heat-pump water heaters want a dedicated 240-volt circuit at their location. Plug-in 120-volt models exist, but they are a compromise we rarely recommend.
- Capacity. The panel has to carry the new load along with everything else in the house, which is what a load calculation answers.
- Location. A heat pump needs enough air around it and somewhere to drain condensate, which can rule out a cramped closet.
Our heat-pump water heater guide goes through each of those in detail. A free whole-home inspection includes the load calculation, and it answers the capacity question for everything you might add, not just the water heater.
On who does what: we are electrical contractors. We run the circuit and do any panel work the load calculation calls for. Installing the water heater, the plumbing and capping the gas line are C-36 plumbing work, and installing heat-pump heating equipment is C-20 HVAC work[12]. We coordinate with those trades, and we will tell you which part of the job is ours.