pm25_2011_durham {openintro}

Air quality for Durham, NC

Description

Daily air quality is measured by the air quality index (AQI) reported by the Environmental Protection Agency in 2011.

Usage

pm25_2011_durham

Format

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

date

Date

aqs_site_id

The numeric site ID.

poc

A numeric vector, the Parameter Occurance Code.

daily_mean_pm2_5_concentration

A numeric vector with the average daily concentration of fine particulates, or particulate matter 2.5.

units

A character vector with value ug/m3 LC.

daily_aqi_value

A numeric vector with the daily air quality index.

daily_obs_count

A numeric vector.

percent_complete

A numeric vector.

aqs_parameter_code

A numeric vector.

aqs_parameter_desc

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

cbsa_code

A numeric vector.

cbsa_name

A character vector with value Durham, NC.

state_code

A numeric vector.

state

A character vector with value North Carolina.

county_code

A numeric vector.

county

A character vector with value Durham.

site_latitude

A numeric vector of the latitude.

site_longitude

A numeric vector of the longitude.

csa_code

a numeric vector

csa_name

a factor with levels Raleigh-Durham-Cary, NC

Source

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

Examples

library(ggplot2)

ggplot(pm25_2011_durham, aes(x = date, y = daily_mean_pm2_5_concentration, group = 1)) +
  geom_line()