London Air

• Air quality index reached a levelTriggers when the hourly air quality index of a site, a borough or all of London rises to the band you choose: Moderate, High or Very High. It triggers once on the way up, and again only after the index has dropped under the band.

• Get current air qualityGet the latest hourly air quality index of every monitoring site in London, or in one borough, from 1 (low) to 10 (very high), with its band and the highest of them all.
• Get site air qualityGet a monitoring site's latest hourly air quality index for each pollutant it measures, with its band.
• Get daily air qualityGet a day's air quality index, the latest by default, for all of London, one borough or one site.
• Get health adviceGet the government's health advice for an air quality band, for everyone and for people with lung or heart problems.
• Get measurementsGet a site's hourly measurements of one pollutant for up to a year, or of every pollutant for up to 31 days, with each one's average, highest and lowest.
• List sitesList the monitoring sites, open or closed, optionally only one borough's or those measuring one pollutant, with their location and pollutants.
• Get siteGet one monitoring site: its type, borough, location, when it opened or closed, and what it measures.
• List local authoritiesList the London boroughs in the network, with their website and whether they are still in it.
• List pollutantsList the pollutants the index is worked out from, what each is and how it affects health.
• Get annual objectivesCheck whether sites met the UK's air quality objectives in a year, for one site, one borough or all of London.
• Count days at each levelCount the days of a year a site's pollutant spent at each index from 1 to 10 and in each band.

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