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Dec 26, 2023 · San Francisco and cities along the Peninsula had air quality levels ranging from “moderate” to “unhealthy for sensitive groups,” according to PurpleAir’s map.
- Engagement Reporter
Aug 8, 2021 · In 2020, a historically bad fire year, the Bay Area Air Quality Management District triggered a record 30 consecutive air quality alerts. Still, the region’s air quality is...
- Yoohyun Jung
- Deputy Data Editor
- How Good Is The Quality of Air in San Francisco?
- When Is Air Quality at Its Best in San Francisco?
- Has Air Quality Improved in San Francisco?
- What Are The Main Causes of San Francisco's Pollution Levels?
- When Will San Francisco Air Quality improve?
- What Are The Health Effects of Living in The Bay area?
- When Will The Levels of Smoke and Pollution Start to Clear in Bay area?
The air quality of San Francisco is rated on average as falling into the “good” bracket of the United States Air Quality Index (US AQI), which describes a level of fine particulate matter (PM2.5) between 0 to 12 μg/m3. In 2019, San Francisco averaged an annual PM2.5 concentration of 7.1 μg/m3, also achieving the World Health Organization’s (WHO) ta...
Generally, air quality in San Francisco is at its best in the spring, as temperatures gradually warm and the forest undergrowth is still wet from the frequent rains of the winter months. March is one of the months that experiences some of the cleanest air quality of the year, as was observed in 2019, coming in with a PM2.5 reading of 4.8 μg/m3, one...
In recent years, air quality in the Bay Area has been subject to high amounts of change in regards to the wildfire season. In 2019, for example, San Francisco experienced a 43.7% decrease in PM2.5 levels from the year prior, though this reduction is attributed largely to the reduction in severe wildfires and not from emission reductions from other ...
Despite fewer power plants and industrial businesses as well as a growing mix of cleaner energy, San Francisco still experiences periods of unhealthy air quality. Primary factors for elevated pollution levels in the Bay Area include transportation emissions from cars, trucks, planes, and ships as well as seasonal wildfires. While transportation emi...
San Francisco has achieved improving air quality over the last 30 years. These improvements have largely been driven by cleaner transportation options (such as a gradual transition towards electric and hybrid vehicles), tighter regulatory controls on industry, and increasingly stringent local and state regulations on emissions ranging from domestic...
Whilst the quality of air in the Bay Area is of relatively good quality in comparison to global locations, and San Francisco’s annual (2019) PM2.5 level of 7.1 μg/m3 achieves the World Health Organisation’s target level of 10 μg/m3, the WHO emphasizes that even at low levels, there is no known “safe” limit for particle pollution below which no nega...
California wildfires have become more frequent and severe in recent years. According to a study conducted by the Lamont Doherty Earth Observatory at Columbia University, climate change has doubled the risk of extreme fire conditions in California since 1970. During the same period, the amount of annual acreage burned has increased eight-fold. As wi...
Sep 19, 2023 · Wildfire smoke will quickly cause air quality over the region to reach unhealthy levels in the North Bay and on the Peninsula.
- Newsroom Meteorologist
Dec 3, 2021 · An AQI value of 50 or below represents good air quality, while an AQI value over 300 signals hazardous conditions. Both Purple Air and the air quality district use this scale.
- News Editor
Sep 21, 2023 · Unhealthy air quality levels, haze and reduced visibility will continue to be a nuisance for Bay Area residents through the rest of Thursday. A light sea breeze will blow out of the west this...
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Mar 31, 2021 · New research published today in the journal Environmental Health Perspectives from Environmental Defense Fund and George Washington University shows air pollution takes an enormous toll on health in the San Francisco Bay Area, and the impacts vary dramatically within neighborhoods.
