Daily air quality is measured by the air quality index (AQI) reported by the Environmental Protection Agency.
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 MassPM2.5 - 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_concentrat…¹ 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
#> # ℹ 439 more rows
#> # ℹ abbreviated name: ¹daily_mean_pm2_5_concentration
#> # ℹ 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>