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Have you seen our Economy indicators on Hotel Occupancy? Read about it.

Want to become involved with PittsburghTODAY? Read about it.

More than 75 percent of African Americans rate their health as good, very good or excellent. But 1-in-4 rate their health as fair or poor compared to about 1-in-5 residents of other races who give their health the lowest ratings. Read about it.

More residents overall support Marcellus Shale drilling than oppose it by a margin of 45 percent to 25 percent, with the rest in neither camp. Read about it.

1,800 residents, 32 counties, 4 states: A distillation of the findings of the Pittsburgh Regional Quality of Life Survey. Read about it.

Did you know that 45,000 jobs in SW PA are dependent upon the waterway transportation system? Read about it.

Our neighbors in Ohio and West Virginia lead the region in classical music attendance. Read about it.

Nearly 70 percent of new Pittsburgh arrivals are between the ages of 22 and 34, migrating from nearby cities such as Philadelphia, Pa.; Washington, D.C.; and New York, NY. Read about it.

Educational and Health Services is Pittsburgh’s largest job sector. Read about it.

Registered nurses pay is low in Pittsburgh by national standards. Read about it.

Local spending on schools is low by benchmark standards. Read about it.

Rush hour traffic in Pittsburgh is less congested than in most cities? Read about it.

Use our sitemap to quickly find content. Read about it.

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page html_indicator.xsl Current_Ozone_Levels_USA

Environment / Ozone

Ground-level ozone or smog irritates the lungs and can make it difficult for people to breathe. Ozone is formed when chemicals emitted by motor vehicles, power plants, certain industries and processes, and even vegetation react chemically in the presence of sunlight. Both ozone and some of the pollutants which cause it are carried by the wind, so pollution generated in one state can affect ozone levels in downwind areas.

The U.S. Environmental Protection Agency has established standards requiring that the maximum daily 8-hour average ozone level at any location be no greater than .08 parts per million. The EPA is considering lowering the standard to .07 or .075 parts per billion.

Current Ozone Levels - U.S.A. including all Benchmark Regions

The Ozone reporting season lasts from April to October.

This map from the EPA AirNow website shows the hourly ozone levels at the subset of monitoring locations that report continously on a daily basis. The colors show ozone levels based on the EPA's Air Quality Index. Green means ‘Good’, Yellow means ‘Moderate’, Orange means ‘Unhealthy for Sensitive Groups’ and Red means ‘Unhealthy’. For more information, visit the EPA's AIRNow website.