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Complete PHOM Indicator Profile Report of Air Quality: Ozone

Definition

The United States Environmental Protection Agency (EPA) ozone standard states that the 8-hour average ozone level should not exceed 0.070 ppm. These standard levels are often referred to as the National Ambient Air Quality Standards (NAAQS). This level is considered protective for most people and within the normal defensive capacities of the human respiratory system.^1-3^[[br]] [[br]] ---- 1. McDonnell, et al. (1997) Prediction of ozone-induced FEV1 changes: Effects of concentration, duration and ventilation. American Journal of Respiratory and Critical Care Medicine. Vol 156, 715-722.[[br]] 2. Mudway, et.al. (2001) Differences in basal airway antioxidant concentrations are not predictive of individual responsiveness to ozone: A comparison of healthy and mild asthmatic subjects. Free Radical Biology and Medicine, Vol 31, No. 8. 962-974.[[br]] 3. Mudway, I and Kelly, F. J. (2004) An investigation of inhaled ozone dose and the magnitude of airway inflammation in healthy adults. American Journal of Respiratory and Critical Care Medicine, Vol 169, 1089-1095.

Numerator

This Indicator Report contains the following variables:[[br]] 1. Number of days with maximum 8-hour average ozone concentrations above the National Ambient Air Quality Standards (NAAQS) by county[[br]] 2. Number of person-days with maximum 8-hour average ozone concentrations above the NAAQS by county

Denominator

When applicable, the population was obtained from the IBIS query system for appropriate years by county.

Data Interpretation Issues

Data on ozone levels are only available where air monitors exist. These monitors do not cover the entire state. The monitors may not measure ozone levels year-round, as the national standard is to measure mostly during summer months. These data include "exceptional events" such as high winds, fires, construction, fireworks, etc. These values represent days when at least one air monitoring station showed a reading over the National Ambient Air Quality Standard (NAAQS) within a county. Each county that had data was used to calculate the percentage of Utah counties that had at least one day where ozone was above the NAAQS. This report uses the 2015 primary and secondary NAAQS of 0.070 parts per million (ppm). For more information on the ozone NAAQS, please visit the [https://www.epa.gov/criteria-air-pollutants/naaqs-table EPA NAAQS Table] and the [https://www.epa.gov/ozone-pollution/table-historical-ozone-national-ambient-air-quality-standards-naaqs Table of Historical Ozone NAAQS] Data for this report represent ambient air (outside air quality). The relationship between ambient concentrations and personal exposure can vary significantly depending upon the pollutant, activity patterns, and micro-environments. Data for this report came from the EPA and therefore may differ slightly from data from other sources.

Why Is This Important?

Ozone is a naturally occurring component of the earth's atmosphere at ground level and in the upper regions of the atmosphere. While upper atmospheric ozone protects the earth from the sun's harmful rays, ground-level ozone can be detrimental to the health of plants, animals, and human beings. Molecules of ozone are made up of three oxygen atoms (O3) and are chemically identical in the upper atmosphere and at ground level. The lungs of animals and humans have a thin liquid lining that protects the lung tissue from normal amounts of ozone. However, sunlight and heat can create new ground-level ozone molecules from nitrogen oxides and volatile organic chemicals that are found naturally at the earth's surface, as well as in emissions from industrial facilities, electric utilities, motor vehicle exhaust, gasoline vapors, and chemical solvents in urbanized regions. Ozone is a principal component of urban smog and is measured in parts per million (ppm). Ozone can cause several adverse health effects in anyone, but especially in sensitive populations such as children, older adults, people with pre-existing lung diseases such as asthma, and people who are physically active outdoors. Some of these health problems include painful breathing, chest tightness, headache, coughing, increased asthma symptoms, lung inflammation, and temporary reduction in lung capacity. Over time, ozone is associated with chronic lung problems and respiratory infections. Adverse health effects from ozone are more likely to occur when ozone levels exceed the EPA standard but are possible when ozone levels are below the standard, especially in sensitive populations. Ground-level ozone, not to be confused with the atmosphere's protective ozone layer, is created by reactions between environmental pollutants, light, and heat. Ozone is the main component of smog and is dangerous to health and the environment. The creation of ozone is facilitated by warm weather and sunshine; therefore, ozone levels are usually higher in the summer and in the mid-afternoon. Climate change may play a part in the creation of more ground-level ozone pollution. As temperatures increase, it is expected that the number of high ozone days will increase, since heat accelerates the nitrogen oxide and volatile organic compound reaction.^1^ Researchers have found that a combination of higher temperatures, sunlight, emissions, and air stagnation events (i.e., inversions) may result in an increase in ozone levels. However, more research is needed to accurately gauge what portion of ozone is actually increasing solely due to climate change.[[br]] [[br]] ---- 1. National Aeronautics and Space Administration (2004). The good, the bad and the ozone. Retrieved March 21, 2012 from the National Aeronautics and Space Administration: [http://www.nasa.gov/missions/earth/f-ozone.html]

Other Objectives

Physical exercise is essential to maintaining good health. In order to exercise safely, Utahns should refer to daily ozone levels by checking them at [https://air.utah.gov/]. If ozone levels are high, consider exercising indoors. The best time to exercise outdoors during the summer months is before noon or after 6:00 p.m. If outdoor exercise is unavoidable during high ozone levels, consider light to moderate activity such as walking.

How Are We Doing?

Most urban counties in Utah often have days that do not comply with the new ozone standard of 0.070 ppm. The Utah Department of Environmental Quality (DEQ) is working to decrease the number of days over the ozone standard.

What Is Being Done?

In response to the new EPA ozone standard of 0.070 ppm, DEQ has begun fitting school buses with cleaner technology, and state office buildings have begun adopting more energy-efficient policies and practices. The DEQ 3-day air quality forecasting program uses a red, yellow, and green stoplight color code to inform the public about how they can help keep pollution levels low and safe. A green day informs the public that pollution levels are low, and they can safely drive and spend time outside. A yellow day informs the public that they should consider limiting driving to reduce pollution levels. A red day strongly encourages the public to reduce driving and other polluting activities to prevent pollution levels from exceeding the health standard. Ultimately, the air quality for Utah citizens is dependent upon each individual taking steps to reduce the amount of energy used and pollution emitted.

Available Services

Find out about current air quality conditions in your county by going to [https://air.utah.gov/]. This can help you make informed decisions about your health. The Utah DEQ 3-day air quality forecasting is available at [https://air.utah.gov/forecast.php]. This forecast helps the public make smart decisions under current air quality conditions. People can use this information to choose when to stay indoors and whether to use mass transit.

More Information

Utah Environmental Epidemiology Program[[br]] Air Pollution and Public Health in Utah[[br]] [http://www.health.utah.gov/utahair/pollutants/O3/][[br]] [[br]] AirNow[[br]] This U.S. Government website provides information on air quality from a collaboration of different agencies.[[br]] [http://airnow.gov][[br]] [[br]] Centers for Disease Control and Prevention[[br]] This CDC website provides information about the way air quality influences health outcomes.[[br]] [http://ephtracking.cdc.gov/showAirLanding][[br]] [[br]] Choose Clean Air[[br]] This DEQ website provides tips and trends regarding healthy choices and pollution levels.[[br]] [https://air.utah.gov/][[br]] [[br]] Environmental Protection Agency[[br]] This website provides information about ozone, adverse health effects, research, and regulations.[[br]] [https://cfpub.epa.gov/airnow/index.cfm?action=gooduphigh.index][[br]] [[br]] Three-day Air Quality Forecast[[br]] This site provides the three-day forecast as well as publications about Utah's compliance with the EPA's new ozone standard.[[br]] [https://air.utah.gov/forecast.php][[br]]


Graphical Data Views

Maximum 8-hour average ozone concentrations above the National Ambient Air Quality Standard (NAAQS), Number of days by county, Utah, 2021

::chart - missing::

CountyNumber of Days exceeding NAAQS
Record Count: 14
Box Elder4
Cache1
Carbon4
Davis21
Duchesne5
Garfield2
Iron2
Salt Lake39
San Juan2
Tooele9
Uintah8
Utah14
Washington2
Weber10

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] These values represent days when at least one air monitoring station showed a reading over the National Ambient Air Quality Standard (NAAQS) for ozone within a county.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Box Elder County, 2001-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 21
200119
200232
200321
20042
200522
200615
200720
200810
20092
20104
20111
201215
20135
20142
20153
20161
20173
20189
20190
20203
20214

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Cache County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200012
20013
20024
20039
20041
20053
20066
200714
20082
20090
20100
20110
20126
20131
20140
20152
20160
20170
20183
20190
20202
20211

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Carbon County, 2011-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 11
20112
201211
20132
20140
20153
20160
20170
20186
20191
20200
20214

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Data are not available prior to 2011 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Davis County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200025
200123
200224
200317
20041
200529
200617
200716
200815
20096
20105
20112
20122
20130
20148
20154
201610
201724
201815
20195
202010
202121

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Duchesne County, 2011-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 11
201124
20128
201344
20142
20152
20168
20179
20189
201912
20201
20215

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Data are not available prior to 2011 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Garfield County, 2011-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 11
20110
20123
20132
20140
20152
2016**
20173
20183
20190
20200
20212

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] ^ ^**The estimate has been suppressed because 1) the relative standard error is greater than 50% or 2) the observed number of events is very small and not appropriate for publication. Data are not available prior to 2011 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Iron County, 2018-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 4
20180
20190
20200
20212

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Salt Lake County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200035
200127
200234
200332
200418
200531
200645
200741
200818
200919
20107
201119
201224
201314
20147
201522
201614
201736
201844
201912
202015
202139

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, San Juan County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200012
20011
20028
200312
20045
20053
20064
20076
20083
20093
20102
20113
20128
20130
20141
20151
20160
20171
20189
20190
20202
20212

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Tooele County, 2005-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 17
200510
200612
200712
20084
20095
20104
20116
20127
20134
20143
20154
20166
201717
20188
20191
20202
20219

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Data are not available prior to 2005 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Uintah County, 2007-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 15
20070
20080
20092
201049
201135
201213
201363
20148
20152
201612
201711
201813
201917
20202
20218

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Data are not available prior to 2007 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Utah County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200028
200122
200224
200335
20047
200514
200631
200722
200812
20095
20108
20110
201214
201312
201410
201514
20168
20178
201822
20190
20203
202114

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Washington County, 2004-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 18
200414
200520
200610
20075
20089
20093
20109
20116
201213
20135
20141
20153
20160
20171
20182
20190
20203
20212

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Data are not available prior to 2004 because either there were no air monitors in the county or 8-hour averages were not collected.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Days by Year, Weber County, 2000-2021

::chart - missing::

YearNumber of Days Above Standard
Record Count: 22
200023
200117
200227
200326
20047
200523
200631
200732
200814
20095
20107
201114
201225
201312
20147
20159
201612
201720
201822
20191
20206
202110

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Box Elder County, 2001-2021

::chart - missing::

YearNumber of Person-days
Record Count: 21
2001780,516
20021,189,026
2003712,768
200444,666
2005856,710
2006643,272
2007802,281
2008435,933
200949,372
2010150,510
20110
2012702,814
2013202,916
2014102,606
2015103,664
20160
2017161,901
2018274,750
20190
2020171,021
2021236,880

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county (estimate) and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Cache County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
20001,010,471
2001185,662
2002381,972
2003679,707
20040
2005301,503
2006404,944
2007932,616
2008213,648
20090
20100
20110
2012579,485
2013117,031
20140
2015239,548
20160
20170
2018254,136
20190
2020260,008
2021137,255

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county (estimate) and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Carbon County, 2011-2021

::chart - missing::

YearNumber of Person-days
Record Count: 11
201121,303
2012169,768
201341,802
20140
201540,770
20160
20170
2018101,345
201920,463
20200
202181,952

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county (estimate) and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2011 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Davis County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
20005,048,862
20014,159,679
20025,492,872
20033,578,148
2004262,189
20056,999,408
20064,182,000
20074,035,304
20084,437,015
20091,509,825
20101,539,530
2011623,676
20120
20130
20142,301,292
20151,338,704
20162,728,640
20177,284,501
20183,868,843
20191,777,405
20203,592,320
20217,726,824

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Duchesne County, 2011-2021

::chart - missing::

YearNumber of Person-days
Record Count: 11
2011430,123
201295,020
2013858,495
201440,412
201541,512
2016162,040
2017179,235
2018159,712
2019239,256
202019,894
202198,690

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2011 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Garfield County, 2011-2021

::chart - missing::

YearNumber of Person-days
Record Count: 11
20110
201210,126
201310,058
20140
20159,938
2016**
201710,122
201810,160
20190
20200
202110,158

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] ^ ^**The estimate has been suppressed because 1) the relative standard error is greater than 50% or 2) the observed number of events is very small and not appropriate for publication. Product of the total population of the county (estimate) and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2011 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Iron County, 2018-2021

::chart - missing::

YearNumber of Person-days
Record Count: 4
20180
20190
20200
2021122,464

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county (estimate) and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Source

U.S. Environmental Protection Agency, Air Quality System (AQS)


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Salt Lake County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
200027,030,540
200123,679,500
200229,380,864
200326,819,258
200414,012,100
200525,595,001
200638,671,920
200739,348,760
200817,991,954
200914,235,130
20106,197,874
201114,665,798
201217,024,336
201312,954,516
20146,541,542
201523,155,209
201614,568,892
201736,410,240
201843,800,054
201913,925,244
202017,482,755
202146,704,489

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, San Juan County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
2000143,340
20010
200295,634
2003108,568
200468,615
200540,959
200613,679
200784,168
200843,308
200929,028
201029,650
201144,508
201260,136
20130
20140
201515,240
20160
20170
2018108,143
20190
202030,556
202129,294

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Tooele County, 2005-2021

::chart - missing::

YearNumber of Person-days
Record Count: 17
2005492,580
2006617,796
2007592,031
2008167,727
2009114,436
2010234,004
2011236,728
2012418,516
2013242,532
201461,446
2015250,468
2016322,675
20171,146,106
2018419,442
201972,259
2020149,024
2021685,404

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2005 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Uintah County, 2007-2021

::chart - missing::

YearNumber of Person-days
Record Count: 15
20070
20080
200965,862
20101,526,043
20111,030,471
2012415,692
20132,140,980
2014295,368
201575,566
2016398,794
2017387,409
2018354,380
2019607,478
202071,940
2021287,800

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2007 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Utah County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
20008,551,653
20017,327,749
20029,135,370
200311,778,582
20041,248,660
20055,599,061
200612,103,992
20077,513,184
20085,363,765
20091,514,403
20103,639,958
20110
20126,476,448
20134,961,997
20144,486,008
20155,153,850
20164,130,574
20174,852,024
201813,688,686
20190
20201,953,177
20219,570,750

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Washington County, 2004-2021

::chart - missing::

YearNumber of Person-days
Record Count: 18
20041,212,277
20052,142,000
2006887,572
2007529,108
2008813,312
2009411,264
20101,107,136
2011706,225
20121,729,752
2013294,008
2014151,109
2015464,040
20160
2017165,859
2018171,700
20190
2020554,739
2021378,864

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone. Data are not available prior to 2004 because there were no air monitors in the county, or 8-hour averages were not collected.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Maximum 8-hour Average Ozone Concentrations Above the National Ambient Air Quality Standards (NAAQS), Number of Person-days by Year, Weber County, 2000-2021

::chart - missing::

YearNumber of Person-days
Record Count: 22
20003,948,740
20013,401,241
20024,873,080
20035,132,975
2004831,176
20054,623,300
20065,954,368
20076,091,876
20082,907,788
2009912,472
20101,392,834
20112,572,152
20124,725,280
20131,666,651
2014960,848
20151,943,704
20162,225,277
20174,029,856
20184,101,744
2019260,213
20201,575,948
20212,656,350

Data Notes

These data include "exceptional events", such as high winds, fires, construction, fireworks, etc.   [[br]] [[br]] Product of the total population of the county and the number of days over the daily National Ambient Air Quality Standard for ozone.

Data Sources

  • U.S. Environmental Protection Agency, Air Quality System (AQS)
  • Population Estimates: National Center for Health Statistics (NCHS) through a collaborative agreement with the U.S. Census Bureau, IBIS Version 2018


Page Content Updated On 10/28/2022, Published on 11/01/2022
Utah Environmental Public Health Tracking Network, Office of Communicable Diseases, Utah Department of Health and Human Services | Telephone: 801-538-6191 | Email: eep@utah.gov
The information provided above is from the Utah Department of Health and Human Services IBIS-PH website (https://ibis.utah.gov/ibisph-view/). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Thu, 28 November 2024 20:27:09 from Utah Department of Health and Human Services, Indicator-Based Information System for Public Health website: https://ibis.utah.gov/ibisph-view/ ".

Content updated: Fri, 26 Jul 2024 17:57:26 MDT