sensortoolkit.calculate._aqi

This module is used to calculate the air quality index (AQI) as defined by U.S. EPA for fine particulate matter (PM2.5).

Resources

Calculation

The AQI is calculated via the following equation:

\[I_p = \frac{I_{Hi} - I_{Lo}}{BP_{Hi} - BP_{Lo}}\left(C_p - BP_{Lo}\right) + I_{Lo}\]

where

\(I_p\) = the index for pollutant p

\(C_p\) = the truncated concentration of pollutant p

\(BP_{Hi}\) = the concentration breakpoint that is greater than or equal to \(C_p\)

\(BP_{Lo}\) = the concentration breakpoint that is less than or equal to \(C_p\)

\(I_{Hi}\) = the AQI value corresponding to \(BP_{Hi}\)

\(I_{Lo}\) = the AQI value corresponding to \(BP_{Lo}\)

More detail about the AQI calculation, as well as a detailed description, are included in the Technical Assistance Document listed above.


@Author:
Samuel Frederick, NSSC Contractor (ORAU)
U.S. EPA / ORD / CEMM / AMCD / SFSB
Created:

Mon Jan 27 13:11:40 2020

Last Updated:

Tue Jul 13 08:43:27 2021

Functions

aqi

Calculate US EPA's air quality index for fine particulate matter.