You qualify for the Bay Area gas water heater exemption if you earn under 80 percent of Area Median Income, spend over 28 percent of income on mortgage and property taxes, or have a panel below 100 amps, a wiring run over 50 feet, or too little room or ventilation.
The Bay Area Air District adopted these exemptions on November 4, 2026, together with a new compliance date of January 1, 2028. For utility rebates by region, see our California water heater rebates guide. DuloCore checked the Air District pages on November 5, 2026; the adopted rule text was still to be posted, so the details below follow the press release and the Regulatory Language posted October 30, 2026.
Who Qualifies for the Bay Area Gas Water Heater Exemption?
Bay Area property owners qualify through income, housing cost, electrical limits or space limits, as the Air District listed in its November 4, 2026 release.
| Exemption |
Test in the Air District release |
| Low income |
Property owner earns less than 80 percent of Area Median Income, including participants in programs such as Medi-Cal or CalFresh |
| Housing cost |
Household pays more than 28 percent of income toward mortgage and property taxes |
| Electrical |
Panel below 100 amps, insufficient panel capacity, or a need to run electrical lines more than 50 feet |
| Space |
Too little room or ventilation for a compliant unit |
The Air District press release also allows temporary installations in emergencies. Water heaters of 30 gallons or less and mobile home water heaters sit outside the zero-NOx standard altogether.
If you qualify on income, also read our guide to low income water heater replacement in California.
How Do You Claim a Bay Area Water Heater Exemption?
In the rule text put to the Board, you apply to the Bay Area Air District for an Exemption Certificate and receive it before the gas water heater is bought and installed.
The Regulatory Language posted October 30, 2026 says the application gives the installation address, your name and contact details, and proof that an exemption applies. In that text, each certificate allows one non-compliant water heater, a licensed contractor certifies an electrical limit, and the space and electrical exemptions are one-time per address and exclude newly constructed buildings.
The Air District Staff Report says that in most cases eligibility rests on self-attestation and limited supporting documents; for an electrical limit, these may include contractor assessments or photographs. It adds that the applicant may buy and install the unit after the certificate is issued.
What Does the January 1, 2028 Date Mean for Bay Area Homes?
From January 1, 2028, a Bay Area home that replaces a gas water heater needs a zero-NOx unit unless the heater is excluded, exempt or on the later 2033 date; a working heater can stay.
The Air District Building Appliances page says the rule applies only at replacement. The Board moved the date from January 2027 to January 2028, and the rule leaves stoves, dryers and fireplaces alone.
The release gives water heaters in multifamily buildings and deed-restricted affordable housing, and product categories such as hydronic units, specialized high heat uses and large water heaters, until January 1, 2033. The Regulatory Language put to the Board defines a multifamily building as one with five or more units. For permit rules, see our water heater permit requirements in California.
Which Rebates Help If You Are Not Exempt?
Income-qualified Bay Area homes can look at PG&E's Energy Savings Assistance program, and San Francisco homes served by CleanPowerSF can earn bill credits for a heat pump water heater.
The PG&E Energy Savings Assistance program upgrades or repairs heat pump water heaters at no charge for income-qualified homes at least five years old. PG&E may also repair or replace a gas water heater it finds inoperable or unsafe.
In San Francisco, CleanPowerSF pays $50 a month for 24 months, $1,200 in all, for a qualifying heat pump water heater installed on or after March 15, 2025.
HEEHRA single-family rebates have been fully reserved statewide since February 24, 2026, according to the HEEHRA status page.
The California Energy Commission describes the HEEHRA Phase I homeowner rebate as one for income-qualified California homeowners who install a heat pump HVAC system, and the HEEHRA status page lists those single-family rebates as fully reserved.
For local prices, see our water heater installation cost in Oakland guide.
Frequently Asked Questions
Does the Bay Area rule make me replace a working gas water heater?
No. The Air District rule applies only when a water heater is replaced, so a working unit can stay in service.
Is a 30-gallon gas water heater covered by the zero-NOx standard?
No. The Air District release says water heaters of 30 gallons or less and mobile home water heaters stay outside the standard.
Has the Air District posted the adopted Rule 9-6 text?
Not yet. On November 5, 2026, the Building Appliances page still listed the Regulatory Language posted October 30, 2026, and the November 4, 2026 press release, but no adopted rule text.
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