Due to heavy winter rainfall, the Air District has extended the permissive burn periods for Crop Replacement and Orchard Pruning & Attrition fires until June 30, 2024.
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A Healthy Breathing Environment For Every Bay Area Resident
舊金山縣
瞭解舊金山縣，包括它的氣候、潛在空氣污染問題及目前的空氣品質。您還可以查看舊金山縣即將發生的空氣局事件，閱讀瞭解當地為改善空氣品質所做的努力。
最新新聞
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Air District appoints Arsenio Mataka as deputy executive officer for Equity & Community Programs四月 23, 2024
The Air District has announced the appointment of prominent environmental justice leader Arsenio Mataka as deputy executive officer for Equity & Community Programs at the agency's Community, Health and Environmental Justice Committee meeting.
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Air District's Hearing Board orders Bayview Hunters Point sand processing facility to get permit四月 16, 2024
The Air District is announcing that its independent Hearing Board has ordered Martin Marietta to get a permit for the company’s sand distribution plant located at Pier 92 in Bayview Hunters Point, San Francisco. The Hearing Board has also imposed restrictions on the plant’s operations to reduce emissions and protect public health.
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氣候
因為舊金山的大部分地勢低於 200 英尺，海洋氣流流過城市的大部分地區，形成涼爽多風的氣候。而該縣東南部則較為溫暖，陽光較為充足，霧天較少。冬季，每日平均氣溫夜間適中，白天溫和；夏季，整個季節的氣溫都較為溫和。最高風速都發生在西部海岸，縣內一般為輕風。每年的降雨量平均在 20 英寸左右，最高降雨量發生在西部海岸。
舊金山縣 (San Francisco County) 的氣候還受到區域性灣區氣候的影響。
舊金山縣的空氣品質
臭氧和細顆粒物污染（即 PM2.5）是影響舊金山灣區的主要區域性空氣污染物。臭氧問題主要發生在夏季，細顆粒物污染主要發生在冬季。
在舊金山，臭氧幾乎從沒有超過健康標準，PM2.5 通常每年只有一兩次超過國家標準。舊金山三面環水，使這裡的氣溫變化較小，因此冬季低溫很少達到冰點，夏季高溫也在形成臭氧及達到不健康標準的水平以下。
資源團隊
舊金山縣的愛惜空氣資源團隊在當地社區倡導降低空氣污染的方法。
Spare the Air Status
上次更新： 2016/11/8