raqs-package {raqs}

raqs: Interface to the US EPA Air Quality System (AQS) API

Description

Offers functions for fetching JSON data from the US EPA Air Quality System (AQS) API with options to comply with the API rate limits. See https://aqs.epa.gov/aqsweb/documents/data_api.html for details of the AQS API.

Details

The 'raqs' package provides an R interface to the US EPA AQS API that publish data in JSON format. To use this package, you first need to register for the AQS API and get your API key. Please check aqs_signup and set_aqs_user to set up your API credentials in R.

All main functions, for fetching data from the AQS API, were named with the following scheme: ⁠aqs_{service}⁠

• aqs_metadata returns information about the API.

• aqs_list returns variable values you may need to create other service requests.

• aqs_monitors returns operational information about the monitors used to collect data.

• aqs_sampledata returns sample data - the finest grain data reported to EPA.

• aqs_dailydata returns data summarized at the daily level.

• aqs_quarterlydata returns data summarized at the calendar quarter level.

• aqs_annualdata returns data summarized at the yearly level

• aqs_qaannualperformanceevaluations returns pairs of data (known and measured values) at several concentration levels for gaseous criteria pollutants.

• aqs_qablanks returns concentrations from blank samples.

• aqs_qacollocatedassessments returns pairs of PM samples collected at the same time and place by different samplers.

• aqs_qaflowrateverifications returns flow rate checks performed by monitoring agencies.

• aqs_qaflowrateaudits returns flow rate audits data

• aqs_qaonepointqcrawdata returns measured versus actual concentration of one point QC checks.

• aqs_qapepaudits returns data related to PM2.5 monitoring system audits.

• aqs_transactionssample returns sample data in the transaction format for AQS.

• aqs_transactionsqaannualperformanceevaluations returns pairs of data QA at several concentration levels in the transaction format for AQS.

Each main function has a set of underlying functions that are responsible for sending requests to specific endpoints (service/filter) and were named with the following scheme: ⁠{service}_{filter}⁠. Please refer to the manual to see how the aforementioned functions work.

Author(s)

Maintainer: Jaehyun Joo [e-mail]

Authors:

• Blanca Himes

See Also

Useful links:

• https://github.com/HimesGroup/raqs

• Report bugs at https://github.com/HimesGroup/raqs/issues