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Daily air quality is measured by the air quality index (AQI) reported by the Environmental Protection Agency.

Usage

pm25_2011_durham

Format

A data frame with 449 observations on the following 20 variables.

date

Date

aqs_site_id

a factor with levels 37-063-0015

poc

a numeric vector

daily_mean_pm2_5_concentration

a numeric vector

units

a factor with levels ug/m3 LC

daily_aqi_value

a numeric vector

daily_obs_count

a numeric vector

percent_complete

a numeric vector

aqs_parameter_code

a numeric vector

aqs_parameter_desc

a factor with levels Acceptable PM2.5 AQI & Speciation Mass PM2.5 - Local Conditions

csa_code

a numeric vector

csa_name

a factor with levels Raleigh-Durham-Cary, NC

cbsa_code

a numeric vector

cbsa_name

a factor with levels Durham, NC

state_code

a numeric vector

state

a factor with levels North Carolina

county_code

a numeric vector

county

a factor with levels Durham

site_latitude

a numeric vector

site_longitude

a numeric vector

Source

US Environmental Protection Agency, AirData, 2011. http://www3.epa.gov/airdata/ad_data_daily.html

Examples


pm25_2011_durham
#> # A tibble: 449 × 20
#>    date    aqs_site_id   poc daily_mean_pm2_5_concentrati… units daily_aqi_value
#>    <fct>   <fct>       <int>                         <dbl> <fct>           <dbl>
#>  1 1/3/11  37-063-0015     1                           5.9 ug/m…              19
#>  2 1/6/11  37-063-0015     1                          10.4 ug/m…              34
#>  3 1/9/11  37-063-0015     1                           5.6 ug/m…              18
#>  4 1/10/11 37-063-0015     1                           6.2 ug/m…              20
#>  5 1/18/11 37-063-0015     1                           9.4 ug/m…              31
#>  6 1/21/11 37-063-0015     1                           5   ug/m…              16
#>  7 1/24/11 37-063-0015     1                          11.5 ug/m…              37
#>  8 1/27/11 37-063-0015     1                           9.8 ug/m…              32
#>  9 1/30/11 37-063-0015     1                          12.5 ug/m…              41
#> 10 2/2/11  37-063-0015     1                           5.5 ug/m…              18
#> # … with 439 more rows, and 14 more variables: daily_obs_count <int>,
#> #   percent_complete <int>, aqs_parameter_code <int>, aqs_parameter_desc <fct>,
#> #   csa_code <int>, csa_name <fct>, cbsa_code <int>, cbsa_name <fct>,
#> #   state_code <int>, state <fct>, county_code <int>, county <fct>,
#> #   site_latitude <dbl>, site_longitude <dbl>