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Indicator Report - Ozone Standard Met

Why Is This Important?

"People with asthma are especially sensitive to ozone exposure. Ozone has been linked to increased frequency of asthma attacks and use of health care services. Ozone exposure may also affect respiratory system development in very young children." - North Carolina Institute of Medicine. Healthy North Carolina 2020: A Better State of Health.

Air Monitor Sites Meeting the Current Ozone Standard of 0.075 ppm North Carolina vs. HNC 2020 Target, 2009-2011

::chart - missing::

Data Notes

This indicator is derived from data collected by the North Carolina Division of Air Quality (DAQ). Air monitors continuously measure the amount of ozone present in the air during the ozone season, which runs from April through October. Hourly averages are computed, which are then summarized into eight-hour averages when at least 75% of the hourly data is available. If a day has at least 18 (75%) of the possible 24 8-hour averages, the maximum value is identified as a valid daily maximum. In addition, if less than 75% of the 8-hour averages are complete and the daily maximum value is greater than the standard, it will be included as a valid daily maximum. The fourth highest daily maximum 8-hour average is averaged across three years and expressed to 3 decimal places.  The HNC 2020 target, which is the target to be reached by 2020, is repeated in the data table for graphing purposes.

Data Sources

Division of Air Quality, N.C. Department of Environment and Natural Resources  Safe Drinking Water Information System, U.S. Environmental Protection Agency 


Air monitor sites meeting the current ozone standard of 0.075 ppm

How We Calculated the Rates

Numerator: Number of air monitor sites meeting the current ozone standard of 0.075 PPM
Denominator: Total number of air monitor sites

Page Content Updated On 02/12/2013, Published on 02/12/2013
State Center for Health Statistics, N.C. Division of Public Health, Telephone: 919-733-4728, Fax: 919-733-8485
North Carolina - A better place to be.
The information published on this website may be reproduced without permission. Please use the following citation: Retrieved Tue, 22 August 2017 16:47:00 from the HealthStats website.

Content updated: Tue, 12 Feb 2013 13:46:50 EST