Is My Gas Water Heater Being Banned?
No. Nobody is coming for the water heater you already own.
But the rules for new gas water heaters in Sonoma County are changing, and the dates just moved. Here is what that means for your house, in plain English.
The Air District has published draft changes that would push the first deadline from January 2027 to January 2028. The public comment period closed August 13, 2026. The Board of Directors is expected to consider the changes for adoption in fall 2026.
Nothing is final yet. Until the Board votes, the January 1, 2027 date is still the one on the books.
Last updated: September 1, 2026 · We update this page every time the status changes.
What the rule actually says
The Bay Area Air District has a rule called Rule 9-6. It has been around since 1992. In 2023 the district updated it to set a zero-NOx standard for new gas water heaters.
NOx is nitrogen oxide. It is one of the ingredients in smog. This is an air quality rule, not a home inspection rule.
Here is the part most articles skip. The rule applies to water heaters based on when they are manufactured and sold. It does not apply to the one bolted to your garage wall right now. There is no inspection. There is no deadline to rip anything out. If your gas water heater is working, you can keep it, service it, and repair it for as long as it lasts.
What “zero-NOx” means in a real house
Right now, the water heater that meets the zero-NOx standard is a heat pump water heater. It runs on electricity. It pulls heat out of the surrounding air and moves it into the tank, a bit like a refrigerator running backwards.
There is no zero-NOx gas water heater on the market today. That is why people call this a gas ban. It is still not a ban on the unit you own. It is a rule about what manufacturers can sell you next time.
The dates, side by side
| Equipment | Adopted date (on the books today) | Proposed new date (July 2026 draft) |
|---|---|---|
| Gas water heaters under 75,000 BTU/hr — most home tank units | January 1, 2027 | January 1, 2028 |
| Gas water heaters 75,000 BTU/hr to 2 million BTU/hr — larger units and most gas tankless | January 1, 2031 | January 1, 2033 |
| Gas furnaces (a separate rule, 9-4) | January 1, 2029 | No change proposed |
Dates apply to the manufacture date of new equipment, not to equipment already installed.
The part nobody is talking about
The July 2026 draft does more than move dates. It also adds exemptions, and they are broad. Air District staff estimate that up to 38 percent of new water heater installations could qualify.
The three proposed categories:
- Income. Lower-income property owners, including households in programs like Medi-Cal or CalFresh.
- Space. Homes without enough room or ventilation for a compliant unit. Think tight utility closets and small garages.
- Electrical. Homes with panels under 100 amps, panels without enough spare capacity, or where the new line would have to run more than 50 feet.
Why this matters for you: a lot of Sonoma County housing stock is older, with tight garages and small panels. If the draft passes as written, plenty of homes here would have a path to keep installing a gas unit. That is worth knowing before anyone talks you into a panic upgrade.
Your three options
- Do nothing. Your current water heater is fine. Keep it. Flush it once a year and get more life out of it.
- If your heater is 8 years or older, make a plan now. Not a purchase. A plan. Know what you would do if it failed on a Sunday, so you are not making a five thousand dollar decision standing in two inches of water.
- Ask about a heat pump water heater while the rebates are strong. The local rebate is at its highest level right now and steps down in 2028.
Rebates in Sonoma County
Sonoma Clean Power raised its heat pump water heater rebate on June 1, 2026. Eligible customers can get up to $2,500 back, and that higher amount runs through March 1, 2028. Customers on CARE or FERA bill discounts can qualify for considerably more.
Two things to know before you count on federal money. The federal 25C tax credit ended on December 31, 2025, so new installations do not get it. And TECH Clean California closed to new single-family reservations in February 2026. The local Sonoma Clean Power rebate is the one that is still live.
Sonoma County Energy and Sustainability also offers free, no-sales-pitch consultations at (707) 565-6470.
Want to know the moment the rule is final?
We will email you once when the Board votes. No spam, just the answer.
Questions homeowners keep asking us
Do I have to replace my gas water heater?
No. The rule applies to new equipment at the point of sale and installation. Nothing requires you to replace a working water heater, and there is no inspection or enforcement aimed at homeowners.
When does the rule actually start?
The date on the books today is January 1, 2027 for standard home units under 75,000 BTU/hr. A July 2026 draft would move that to January 1, 2028. The Board is expected to consider it in fall 2026. We update this page when that happens.
What is a zero-NOx water heater?
One that produces no nitrogen oxide emissions. In practice that means a heat pump water heater, which runs on electricity instead of burning gas. There is no zero-NOx gas model available today.
Does this cover tankless water heaters?
Most gas tankless units run above 75,000 BTU/hr, which puts them in the larger category with a later date — 2031 today, 2033 under the draft. We can check the rating plate on your unit and tell you which category you are in.
How much does a heat pump water heater cost?
More than a gas unit to install, and about the same to run. The install cost depends on your electrical panel, the space around the unit, and whether a new circuit has to be run. We quote it on site, with the rebate already subtracted so you see the real number.
Are there rebates in Sonoma County?
Yes. Sonoma Clean Power offers a heat pump water heater rebate of up to $2,500 for eligible customers through March 1, 2028, with more available for CARE and FERA customers. The federal 25C credit ended at the end of 2025.
Not sure where your water heater stands?
We will tell you its age, which category it falls in, and what your options are. No pressure and no scare tactics.
Sources: Bay Area Air District, Rule 9-6 draft amendments and July 14, 2026 announcement · Sonoma Clean Power water heating rebates · West Coast Plumbing, License CA #1115191.