Calculate the value of AQI and assign its category:

$($

a

$)$

$$If the value for

$1$

$-$

hr ozone is

$0$

$.$

$2$

$2$

$$ppm

$,$

$2$

$4$

$-$

hr SO

$2$

$$is

$0$

$.$

$2$

$$ppm and

$1$

$-$

hr NO

$2$

$$is

$0$

$.$

$7$

$$ppm

$.$

$($

b

$)$

$$If you measured the

$1$

$-$

hr value of ozone to be

$0$

$.$

$1$

$5$

$6$

$$ppm and the

$8$

$-$

hr value of O

$3$

$$to be

$0$

$.$

$1$

$3$

$8$

$$ppm

$.$

Step

$1$

:

Identify the highest concentration among all of the

monitors within each reporting area and truncate as

follows:

Ozone

$($

ppm

$)$

$-$

$$truncate to

$3$

$$decimal places

$$

$$

$2$

$.$

$5$

$($

$$

$$

$$

$3$

$)$

$-$

$$truncate to

$1$

$$decimal place

$$

$$

$1$

$0$

$($

$$

$$

$$

$3$

$)$

$-$

$$truncate to integer

$$

$$

$($

$$

$$

$$

$)$

$-$

$$truncate to

$1$

$$decimal place

SO

$2$

$($

ppb

$)$

$-$

$$truncate to integer

$$

$$

$2$

$($

$$

$$

$$

$)$

$-$

$$truncate to integer

Step

$2$

:Using Table

$2$

$,$

$$find the two breakpoints that contain theconcentration.

Step

$3$

:Using Equation

$1$

$,$

$$calculate the index.

Step

$4$

:Round the index to the nearest integer