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 Air Quality Monitoring Network

The monitoring network provides data concerning Pinal County’s air quality so that we can assess compliance with the National Ambient Air Quality Standards (NAAQS) as required by the Federal Clean Air Act. The federal Environmental Protection Agency (EPA) sets air quality standards to protect our health. The standards define how much air pollution is safe in the air outdoors.

Pinal County Air Quality currently measures ozone and particulate matter levels by operating a network of monitoring and sampling equipment throughout Pinal County. The equipment at an air monitoring station can vary from a complex array of continuous air monitors that operate 24 hours a day year-round to a single sampler with a filter that captures particulates every 3—6 days. Data generated from this monitoring network is carefully reviewed, edited and analyzed prior to submittal into EPA’s national air quality database referred to as the Air Quality System (AQS).  The Air Quality Report page has the current and recent pollutant concentrations and AQI values.  The data files below contain historical data for our continuous particulate matter and ozone monitors.


DRAFT 2021 Particulate Matter (PM10, PM2.5) Exceedances

DRAFT 2020 Particulate Matter (PM10, PM2.5) Exceedances

DRAFT 2019 Particulate Matter (PM10, PM2.5) Exceedances

 

 Network Plans

 Information

 AQS Data Mart - Website to download air quality data (ozone, particulate matter) that's been submitted to the EPA Air Quality System (AQS) database

AQI Daily Air Quality Reporting - The Air Quality Index (AQI) is a mechanism for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be of concern to you. The AQI focuses on your health and the effects air quality may have upon you within a few hours or days after breathing polluted air.

 

 

 

 File Archives

 Network Assessment

 Special Studies

 Recent Ozone Data

Apache Junction

2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

Casa Grande

2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

Pinal Air Park

2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

 Recent Particulate Matter (PM2.5) Data

Apache Junction No Continuous Data

Filter - 2016, 2017, 2018, 2019, 2020, 2021

Casa Grande Continuous - 2016, 2017, 2018, 2019, 2020, 2021 Filter - 2016, 2017, 2018, 2019, 2020, 2021
Hidden Valley Continuous - 2016, 2017, 2018, 2019, 2020, 2021 Filter - 2016, 2017, 2018, 2019, 2020, 2021

 Recent Particulate Matter (PM10) Data

Apache Junction (Continuous) - 2015, 2016, 2017, 2018, 2019, 2020, 2021
Casa Grande (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Combs (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Coolidge Discontinued 12/31/19 (Filter) - 2015, 2016, 2017, 2018, 2019
Cowtown - Discontinued 12/31/15 (Continuous) - 2014, 2015
Eloy - Discontinued 12/31/2017 (Filter) - 2015, 2016, 2017
Eloy - Established 4/1/16 (Continuous) - 2016, 2017, 2018, 2019, 2020, 2021
Hidden Valley - Established 1/1/16 (Continuous) - 2016, 2017, 2018, 2019, 2020, 2021
Maricopa  (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Pinal Air Park (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Pinal County Housing (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Stanfield (Continuous) - 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

 Data Archives

PM10 Violations

2010  2011 2012 2013 2014 2015 2016 2017 2018 2019

Apache Junction

    0   0 0 0 0 4 0
Casa Grande 1 14 2 4 5 1 1 2 9 0
Combs (San Tan Valley)  1 12 5 3 5 1 2 1 3

0

Cowtown 28 99 59 67 64 13        Closed in 2016
Eloy            Started in 2016 2 3 8 0
Hidden Valley            Started in 2016 30 38 29 12
Maricopa 2 15 7 4 2 0 3 2 7 0
Eleven Mile Corner 6 21 5 5 1 1 3 10 9 0
Pinal Air Park Started in 2012 0 2 6 0 0 0 0 0
Stanfield 1 23 12 17 9 1 13 13 15

1

 

 PM2.5 Filter-Based Violations  2010 2011 2012 2013  2014 2015 2016 2017 2018 2019
Apache Junction                    
Casa Grande
Hidden Valley

 

 PM2.5 Cont. Violations  2016 2017 2018 2019
Casa Grande        
Hidden Valley        

 

 Ozone Violations 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Apache Junction                    
Casa Grande                    
Pinal Air Park                    

 

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