PM25

China PM2.5 and ozone readings Data From U.S. Consulate. Include below cities of China:

• Beijing
• Shanghai
• Chengdu
• Guangzhou
• Shenyang

Another gem about Air Quality Index of China available here ChinaAqi, all monitoring stations in most cities of China are available, most AQI data are available, all the data is form China's official sector. Check it out!

Installation

Add this line to your application's Gemfile:

gem 'pm25'

And then execute:

$ bundle

Or install it yourself as:

$ gem install pm25

Usage

# Beijing
PM25::Beijing.get
# => return an array include current and history data:
# [{"title"=>"06/04/2013 6:00:00 PM",
#   "link"=>"http://www.stateair.net/web/post/1/1.html",
#   "description"=>
#    "06-04-2013 18:00; PM2.5; 71.0; 159; Unhealthy (at 24-hour exposure at this level)",
#   "Param"=>"PM2.5",
#   "Conc"=>"71.0",
#   "AQI"=>"159",
#   "Desc"=>"Unhealthy (at 24-hour exposure at this level)",
#   "ReadingDateTime"=>"06/04/2013 6:00:00 PM"},
#  {"title"=>"06/04/2013 5:00:00 PM",
# ......

PM25::Beijing.all
# => return an array with all data, all value been parsed:
# [{"Conc"=>125.0,
#   "AQI"=>187,
#   "Desc"=>"Unhealthy (at 24-hour exposure at this level)",
#   "ReadingDateTime"=>Thu, 13 Jun 2013 12:00:00 +0000},
#  {"Conc"=>121.0,
#   "AQI"=>185,
#   "Desc"=>"Unhealthy (at 24-hour exposure at this level)",
#   "ReadingDateTime"=>Thu, 13 Jun 2013 11:00:00 +0000},
#  {"Conc"=>110.0,
#   "AQI"=>179,
#   "Desc"=>"Unhealthy (at 24-hour exposure at this level)",
#   "ReadingDateTime"=>Thu, 13 Jun 2013 10:00:00 +0000},
#  ......
#
# column types:
#   - 'Conc': float
#   - 'AQI': integer
#   - 'Desc': string
#   - 'ReadingDateTime': datetime

PM25::Beijing.last # or PM25::Beijing.latest
# => return a hash with the latest data, all value been parsed:
# {"Conc"=>125.0,
#  "AQI"=>187,
#  "Desc"=>"Unhealthy (at 24-hour exposure at this level)",
#  "ReadingDateTime"=>Thu, 13 Jun 2013 12:00:00 +0000}


# Shanghai
PM25::Shanghai.get
PM25::Shanghai.all
PM25::Shanghai.last

# Chengdu
PM25::Chengdu.get
PM25::Chengdu.all
PM25::Chengdu.last

# Guangzhou
PM25::Guangzhou.get
PM25::Guangzhou.all
PM25::Guangzhou.last

# Shenyang
PM25::Shenyang.get
PM25::Shenyang.all
PM25::Shenyang.last

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request