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

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

Graph Views

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.

How We Calculated the Rates

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.

Date Indicator Content Last Updated: 10/28/2022


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's Center for Health Data IBIS-PH web site (http://epht.health.utah.gov). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Thu, 25 April 2024 1:29:49 from Utah Department of Health, Center for Health Data, Indicator-Based Information System for Public Health Web site: http://epht.health.utah.gov ".

Content updated: Tue, 1 Nov 2022 08:49:35 MDT