Now the timestamp displayed shows, "Updated 9:00pm PDT, Sep 7." Air Quality Alert - Purple/Very Unhealthy ALERTSF: Air Quality-Very Unhealthy: Active youth/adults/people with heart or lung diseases should avoid prolonged outdoor exertion. Cities including Fairfield, San Rafael, San Francisco and Oakland were awash in purple, the color the Bay Area Air Quality Management District has chosen for "unhealthy air." Think of the AQI as a yardstick that runs from 0 to 500. The interactive, crowdsourced air quality map called Purple Air shows a wide range of air quality conditions across the Bay Area, from "good" to "unhealthy." The map below, updated hourly, shows air quality levels across broad areas in the Bay Area. The Bay Area air district lists current and recent AQI from individual monitoring stations. San Francisco’s Air Quality seems to be getting worse, current AQI is 239, purple, very unhealthy. On September 9, 2020, as skies above Oakland and San Francisco turned an eerie dark orange from the smoke, about 600,000 people visited the PurpleAir air quality … Once connected, air pollution levels are reported instantaneously and in real-time on our maps Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views. For example, on August 21st, when I checked these sites, the AQI given on AirNow.gov for the 94720 zip code of Berkeley was 107. The readings below are from both sensors in the PA-II-SD sensor unit. A new report entitled, Sustainable Aviation Fuel: Greenhouse Gas Reductions from Bay Area Commercial Aircraft, commissioned by the Air District and examining the potential positive air quality effects of sustainable aviation fuel, has been released and is available on the Air District website. For example, an AQI value of 50 or below represents good air quality, while an AQI value over 300 represents hazardous air quality. The GAIA air quality monitoring stations are using high-tech laser particle sensors to measure in real-time PM2.5 pollution, which is one of the most harmful air pollutants. Y ou may have noticed PurpleAir and AirNow.gov giving different Air Quality Index (AQI) values for your zip code. Air Quality Index (AQI) sites use a map to show the AQI number for an area. A precise date stamp would be nice, however, an hour off is acceptable. Before you step out, check air quality levels in your area. SF health director predicts city could hit purple tier by Sunday, prompting state-mandated curfew. At purple, the air quality is very unhealthy with a range of 201 to 300, when everyone should avoid outdoor activities and stay indoors. The Air Quality Index (AQI) levels map was dotted with very unhealthy purple readings across the Bay Area, including a 249 in San Rafael and 236 in San Leandro at 8 a.m. There is plenty of confusion when it comes to Air Quality Index readings during this time of smoke-filled skies from the historic outbreak of wildfires. The higher the AQI value, the greater the level of air pollution and the greater the health concern. The map shows changes in air quality (ozone and particles): yellow is moderate, orange unsafe for sensitive groups, red unhealthful, purple very unhealthful and brown hazardous. A group to share information and experiences with PurpleAir sensors. Very easy to set up, they only require a WIFI access point and a USB power supply. Plus, the air quality is based upon your current location, or your zip code. Air Monitoring Data View current and historical air quality and weather information collected from the Air District’s air monitoring network . By contrast, PurpleAir gave values that are in the 130s to 150s. You’ll need to zoom into the map to see the sensor reports. The results are automatically sent to purpleair.com website for aggregation and analysis. According to air quality monitoring network Purple Air, Northern California’s air quality is currently the worst in the world. San Francisco air quality is now Purple (very unhealthy). This poor air quality isn't new to San Francisco. Get air quality and weather information for the Bay Area. Saratoga-weather.org hosts a PurpleAir PA-II-SD air quality sensor on the north side of the house adjacent to the temperature/humidity sensors for our Davis Vantage Pro Plus weather station. AIRNow - San Francisco, CA Air Quality - AQI: Unhealthy for Sensitive Groups (101 - 150) Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air. Purple Air’s air quality map can be found here. AirNow is also running a pilot project that adds data from low-cost sensors to a fire and smoke map. Stay a step ahead of the latest sneaker launches and drops. If levels are high, consider rescheduling your exercise for another time — pollution levels are typically highest near midday or early afternoon — or choose to exercise indoors. The city skyline is obscured by smoke and Northern California’s air is rated worst in the world as a result of smoke from the Camp fire. 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