Air Quality Advisory

Smoke from wildfires in Northern California is predicted to be transported into the Bay Area on Wednesday and Thursday. As a result, hazy and smoky skies are predicted. Smoke is forecast to stay mostly aloft, and air quality is expected to be in the moderate AQI category. Pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect.

Air District Operations

The Air District continues to take steps to ensure air quality and public health are protected while the Bay Area adjusts to the latest phases of the COVID pandemic. Permits for businesses adjusting operations to aid in the public health response will continue to be expedited. Read more... | en Español

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Regulation 9 Rule 4: Nitrogen Oxides from Fan Type Residential Central Furnaces - Adopted

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	Rule #	Rule Name	Adopted	Amended	table-mobile-only-column
	Regulation 9, Rule 4	Nitrogen Oxides from Fan Type Residential Central Furnaces	N/A	07/12/1983	Adopted Document: Nitrogen Oxides from Fan Type Residential Central Furnaces (15 Kb PDF, 3 pgs, revised 24/04/2018) Description: This rule limits emissions of nitrogen oxides from natural gas-fired fan type residential central furnaces. Rule #: Regulation 9, Rule 4 Rule Name: Nitrogen Oxides from Fan Type Residential Central Furnaces Adopted: N/A Amended: 07/12/1983 Contact: N/A
	Rule Status Adopted Document Nitrogen Oxides from Fan Type Residential Central Furnaces (15 Kb PDF, 3 pgs, revised 24/04/2018) Contact N/A Description This rule limits emissions of nitrogen oxides from natural gas-fired fan type residential central furnaces.