Ads
related to: what is the highest ozone level
Search results
Results From The WOW.Com Content Network
Ground-level ozone (O 3), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas.
The highest levels of ozone in the atmosphere are in the stratosphere, in a region also known as the ozone layer between about 10 and 50 km above the surface (or between about 6 and 31 miles). However, even in this "layer", the ozone concentrations are only two to eight parts per million, so most of the oxygen there is dioxygen, O 2 , at about ...
According to the American Lung Association's recent "State of the Air 2017" report, California is a leader in air pollution among other states, with the highest ozone levels. [10] The top three cities in the country with the highest recorded levels of ozone (smog) levels were Los Angeles-Long Beach, Bakersfield, and Fresno-Madera. [10]
Science & Tech. Shopping. Sports
The weather service and state DEM provide some tips on avoiding health problems due to heat and bad air.
Ozone (O 3) Primary and Secondary 0.12 ppm (235 μg/m 3) 1-hour a: expected number of days per calendar year, with maximum hourly average concentration greater than 0.12 ppm, is equal to or less than 1 40 CFR 50.9: Primary and Secondary 0.070 ppm (140 μg/m 3) 8-hour Annual fourth-highest daily maximum 8-hour concentration, averaged over 3 years
For the eighth time this year, the Mid-America Regional Council has issued an ozone alert due to unhealthy levels of smog. Air quality alert issued for Kansas City as ozone levels likely to reach ...
An individual score is assigned to the level of each pollutant and the final AQI is the highest of those five scores. The pollutants can be measured quite differently. SO 2, NO 2 and PM 10 concentration are measured as average per day. CO and O 3 are more harmful and are measured as average per hour. The final AQI value is calculated per day.