epa_downloadData: Download EPA air quality data

In PWFSLSmoke: Utilities for Working with Air Quality Monitoring Data

Description

This function downloads air quality data from the EPA and saves it to a directory.

Available parameter codes include:

1. 44201 – Ozone

2. 42401 – SO2

3. 42101 – CO

4. 42602 – NO2

5. 88101 – PM2.5

6. 88502 – PM2.5

7. 81102 – PM10

8. SPEC – PM2.5

9. WIND – Wind

10. TEMP – Temperature

11. PRESS – Barometric Pressure

12. RH_DP – RH and dewpoint

13. HAPS – HAPs

14. VOCS – VOCs

15. NONOxNOy

Usage

epa_downloadData(
  year = NULL,
  parameterCode = "88101",
  downloadDir = tempdir(),
  baseUrl = "https://aqs.epa.gov/aqsweb/airdata/"
)

Arguments

year	year
parameterCode	pollutant code
downloadDir	directoroy where monitoring data .zip file will be saved
baseUrl	base URL for archived daily data

Value

Filepath of the downloaded zip file.

Note

Unzipped CSV files are almost 100X larger than the compressed .zip files.

References

EPA AirData Pre-Generated Data Files

Examples

## Not run: 
# Fail gracefully if any resources are not available
try({

zipFile <- epa_downloadData(2016, "88101", '~/Data/EPA')
tbl <- epa_parseData(zipFile, "PM2.5")

}, silent = FALSE)

## End(Not run)

PWFSLSmoke documentation built on Nov. 23, 2021, 5:06 p.m.