If you’re worried about local air quality from wildfires, pollen, or environmental pollution, you can check the current Air Quality Index (AQI) using your iPhone or iPad. Currently, Apple only supports checking the AQI in certain countries (including the U.S., U.K., Germany, and India), but it should roll out in more regions in the future.
如果您担心野火，花粉或环境污染引起的当地空气质量，则可以使用iPhone或iPad查看当前的空气质量指数(AQI)。 目前，Apple仅支持在某些国家(包括美国，英国，德国和印度)检查AQI，但将来应该在更多地区推出。
什么是空气质量指数？ (What is an Air Quality Index?)
An Air Quality Index (AQI) is a numerical indicator of regional outdoor air quality in your area. Each country has its own way of determining air quality. For example, The Air Quality Index in the United States is defined by the EPA as a composite scale from 0 to 500 that incorporates information about five different pollutants (ground-level ozone, particle pollution, carbon monoxide, sulfur dioxide, and nitrogen dioxide) into one index.
空气质量指数 (AQI)是您所在地区区域性室外空气质量的数字指标。 每个国家都有自己的确定空气质量的方式。 例如， 美国 EPA 将美国的空气质量指数定义为从0到500的综合等级，其中包含有关五种不同污染物(地面臭氧，颗粒污染，一氧化碳，二氧化硫和二氧化氮)的信息成为一个索引。
The U.S. AQI is divided into six categories, each with its own color. An AQI above 100 means the air quality is dangerous to sensitive groups. As the AQI rises, the number of people impacted by the poor air quality increases.
美国AQI分为六类，每种都有其自己的颜色。 AQI高于100意味着空气质量对敏感人群有害。 随着空气质量指数(AQI)的提高，受恶劣空气质量影响的人数也在增加。
| Color | Air Quality Index (AQI) | Level of Health Concern | | Green | 0 to 50 | Good | | Yellow | 51 to 100 | Moderate | | Orange | 101 to 150 | Unhealthy for Sensitive Groups | | Red | 151 to 200 | Unhealthy | | Purple | 201 to 300 | Very Unhealthy | | Maroon | 301 to 500 | Hazardous |
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| 颜色 | 空气质量指数(AQI) | 对健康的关注程度 | | 绿色 | 0至50 | 好 | | 黄色 | 51至100 | 中等 | | 橙子 | 101至150 | 对敏感人群不利 | | 红 | 151至200 | 不良 | | 紫色 | 201至300 | 非常不健康 | | 栗色 | 301至500 | 危险的 |
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Countries such as the United Kingdom, Germany, and India each use its own custom Air Quality Index methodology, but the color codes are similar to the U.S. There are too many variations in AQI systems to list them all here, so be sure to research your region’s AQI to understand exactly how it works.
英国， 德国和印度等国家/ 地区均使用自己的自定义空气质量指数方法，但是颜色代码与美国相似。AQI系统的变化太多，无法在此处列出所有这些信息，因此请务必研究您的地区的AQI，以准确了解其工作原理。
Regardless of country, the goal of every AQI is the same: to allow you to quickly see if your local air is safe to breathe.
无论哪个国家/地区，每个AQI的目标都是相同的：允许您快速查看本地空气是否可以安全呼吸。
如何在iPhone或iPad上快速检查AQI (How to Quickly Check AQI on an iPhone or iPad)
One of the fastest ways to check AQI for your area is by using Apple Maps on your iPhone or iPad running iOS or iPadOS 12.2 or later. To do it, open the “Apple Maps” app and then tap the navigation arrow to center the map on your current location.
检查您所在地区的AQI最快的方法之一是在运行iOS或iPadOS 12.2或更高版本的iPhone或iPad上使用Apple Maps。 为此，请打开“ Apple Maps”应用程序，然后点击导航箭头以将地图居中于当前位置。
Once the map is correctly positioned, look for a small rectangular box in the bottom-right corner of the screen. If your country is supported, you will see a local temperature and an AQI number along with a category color code.
正确放置地图后，在屏幕的右下角寻找一个小的矩形框。 如果支持您的国家/地区，您将看到当地温度和AQI编号以及类别颜色代码。
If you don’t see an AQI number in the corner, there could be two reasons. The first is that AQI might not be available in your country via Apple Maps yet. It is also possible that the AQI feature is turned off in the Apple Maps settings. Visit Settings app > Maps > Air Quality Index and tap the toggle to turn it on.
如果在拐角处看不到AQI编号，则可能有两个原因。 首先是您的国家/地区可能无法通过Apple Maps使用AQI。 也有可能在Apple Maps设置中关闭了AQI功能。 访问设置应用>地图>空气质量指数，然后点击切换开关将其打开。
The handy thing about using Maps to see AQI is that you can use it to check the AQI of any area of the world where the feature is supported. Reposition the map, zoom in enough, wait a moment, and that area’s AQI will appear in the corner of the screen.
使用“地图”查看AQI的方便之处在于，您可以使用它来检查世界上任何支持该功能的区域的AQI。 重新放置地图，放大足够，稍等片刻，该区域的AQI将显示在屏幕的一角。
You can also use the Apple Weather app to quickly check AQI. Open the pre-installed “Weather” app and then scroll down to the bottom of your local forecast page. There, you will see “Air Quality Index” and “Air Quality” listed side-by-side.
您还可以使用Apple Weather应用程序快速检查AQI。 打开预安装的“天气”应用程序，然后向下滚动到本地天气预报页面的底部。 在这里，您会看到“空气质量指数”和“空气质量”并列列出。
As with Apple Maps, you can use the Weather app to check the AQI of other areas if you add them as forecast locations within the app. This can be very handy if you plan to travel to an area and you’d like to know what the AQI is in the area before arriving.
与Apple Maps一样，如果将它们添加为应用程序中的预测位置，则可以使用“天气”应用程序检查其他区域的AQI。 如果您打算旅行到某个地区并且想在到达之前知道该地区的AQI，这将非常方便。
翻译自: https://www.howtogeek.com/687481/how-to-check-your-local-air-quality-index-on-iphone-or-ipad/
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