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On July 14, the Air District released draft amended rule language outlining potential exemptions and a delayed start date for the existing zero-NOx residential water heater requirement under Air District Rule 9-6. The Air District is publishing the draft language for public review and comment ahead of the Board of Directors' consideration for adoption this fall.

The Bay Area Air District Board of Directors voted on November 4 to amend Rule 9-6, delaying the zero-NOx residential water heater requirement by one year and establishing exemptions for low-income property owners and for properties where electrical or space constraints make the transition especially difficult.

The Air District Board of Directors has adopted amendments to Regulation 9, Rules 4 and 6, to eliminate emissions of nitrogen oxides, or NOx, from residential and commercial natural gas furnaces and water heaters in the Bay Area by requiring new appliances to be zero-NOx. 

The Air District will host a public learning session on Tuesday, October 22, virtually via Zoom, regarding adopted rules (“Building Appliance Rules”) impacting nitrogen oxide, or NOx, emissions from natural gas-fired water heating appliances. Members of the public are invited to attend, learn, and ask questions about these rules.

Aug 17, 2026 ... FOR IMMEDIATE RELEASE: July 14, 2026 CONTACT: communications@baaqmd.gov Air District publishes draft changes to water heater rule that delay implementation and lower costs Draft ...

Nov 4, 2026 ... FOR IMMEDIATE RELEASE: November 4, 2026 CONTACT: communications@baaqmd.gov Air District Board of Directors adopts water heater rule amendments and delays implementation to January ...

Jan 17, 2008 ... Compliance and Enforcement Division January 17, 2008 Compliance Advisory This Advisory is provided to inform you about activities of the Air District which may affect your operation. It ...

Jun 21, 2023 ... BAY AREA AIR QUALITY MANAGEMENT DISTRICT RESOLUTION No. 2023 - 09 A Resolution of the Board of Directors of the Bay Area Air Quality Management District Directing Staff to Submit Regulation 9, ...

BAY AREA AIR QUALITY MANAGEMENT DISTRICT RESOLUTION No. 2023 - 03 A Resolution of the Board of Directors of the Bay Area Air Quality Management District Amending Regulation 9, Rule 4 (Nitrogen ...

Mar 25, 2008 ... DRAFT 3-18-2008 REGULATION 9 INORGANIC GASEOUS POLLUTANTS RULE 7 NITROGEN OXIDES AND CARBON MONOXIDE FROM INDUSTRIAL, INSTITUTIONAL, AND COMMERCIAL BOILERS, STEAM GENERATORS, AND PROCESS ...

Oct 21, 2024 ... Installation Costs for Zero-NOx Space and Water Heating Appliances Version 2.0 - Rate Updates Bay Area Air Quality Management District prepared for Energy + Environmental Economics (E3), ...

Apr 4, 2011 ... DRAFT 4-4-2011 REGULATION 9 INORGANIC GASEOUS POLLUTANTS RULE 7 NITROGEN OXIDES AND CARBON MONOXIDE FROM INDUSTRIAL, INSTITUTIONAL, AND COMMERCIAL BOILERS, STEAM GENERATORS, AND PROCESS HEATERS ...

Aug 7, 2008 ... 5. BOILER, STEAM GENERATOR AND PROCESS HEATER TUNING PROCEDURE 5.1 Inspection Procedure for Boilers, Steam Generators and Process Heaters 5.1.1 Using a thermometer and probe with a ...

May 7, 2026 ... Board of Directors MEETING May 13, 2026 MEETING LOCATION(S) FOR IN-PERSON ATTENDANCE BY BOARD MEMBERS AND MEMBERS OF THE PUBLIC Bay Area Metro Center Office of Contra Costa County 1st Floor ...

Mar 25, 2008 ... Manual of Procedures, Volume 1, Chapter 5 DRAFT 5. BOILER, STEAM GENERATOR AND PROCESS HEATER TUNING PROCEDURE 5.1 Inspection Procedure for Boilers, Steam Generators and Process Heaters ...

Jun 30, 2008 ... Bay Area Air Quality Management District 939 Ellis Street San Francisco, CA 94109 Staff Report Proposed Amendments to BAAQMD Regulation 9, Rule 7: NITROGEN OXIDES AND CARBON ...

Nov 18, 2020 ... AGENDA: 3 Air District Regulation of Appliances Climate Protection Committee November 19, 2020 Jennifer Elwell Senior Air Quality Specialist Bay Area Air Quality Management ...

Nov 3, 2026 ... Board of Directors MEETING November 4, 2026 MEETING LOCATION(S) FOR IN-PERSON ATTENDANCE BY BOARD MEMBERS AND MEMBERS OF THE PUBLIC Bay Area Metro Center 1st Floor Board Room 375 Beale ...