Indicator Profile of Ozone in Outdoor Air

Why Is This Important?

Ozone is an odorless, colorless gas that forms both in the air at ground level and in the Earth's upper atmosphere (the stratosphere). Ground-level ozone forms when precursor pollutants that come from cars, power plants, and other sources react with each other in heat and sunlight.

While ozone in the stratosphere creates a layer that protects us from the sun's harmful ultraviolet (UV) rays, ozone at ground level may irritate and damage the lungs, and harm human health in other ways. The federal health-based standard for ozone in outdoor air is 0.075 parts per million (ppm), averaged over an 8-hour period.

Ozone in Outdoor Air, Number of Days Ozone Exceeded 0.075 ppm, by County, 2010

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Data Notes

Not all New Jersey counties have a monitoring station for ozone. Only those counties with monitoring stations are listed.

Data Sources

New Jersey Department of Environmental Protection, Bureau of Air Monitoring; 

Other Graphical Views


Days (and person-days) in which the average concentration of ozone in outdoor air exceeds the regulatory standard at an ozone monitoring point

How We Calculated the Rates

Numerator: Number of days in a year in which the ozone concentration at a monitor exceeded the National Ambient Air Quality Standard (NAAQS), averaged over an 8-hour period; or exceeded the NAAQS of 0.12 ppm, averaged over a 1-hour period; or number of person-days, which is the product of the number of days with an ozone exceedance times the population of the geographic area (county) represented by a monitor.
Denominator: Not applicable

Page Content Updated On 06/26/12, Published on 06/26/12
Environmental Public Health Tracking Project, New Jersey Department of Health, PO Box 369, Trenton, NJ 08625-0369, Phone: 609-826-4984, e-mail: nj.epht@doh.state.nj.us, Web: www.nj.gov/health/epht
The information provided above is from the New Jersey Department of Health's NJSHAD Web site (http://nj.gov/health/shad). The information published on this website may be reproduced without permission. Please use the following citation: "Retrieved Sun, 21 December 2014 22:24:35 from New Jersey Department of Health, Center for Health Statistics, State Health Assessment Data Web site: http://nj.gov/health/shad".

Content updated: Sat, 20 Sep 2014 04:00:44 EDT