In general, there are two types of air quality standards.

At minimum, however, they would still have to meet federal air quality standards.

There are only a half dozen Federal air quality standards, and the state has, with few exceptions, always met them.

In order to meet the European air quality standards, they are prepared to take more extensive measures.

They are now considered essential because rigorous new air quality standards demand them.

"Based on this," he said, "they were not going to violate any of the air quality standards.

Several strategies were available to states to bring stationary sources into compliance with air quality standards.

For example, many air quality standards require that certain near worst case meteorological conditions be applied.

California is at odds with the Bush administration on a host of issues, including medical marijuana, financial privacy, water policies and air quality standards.

The 22-state order had been based on the new air quality standards that the court had just invalidated.

Many of the technologies that will help us to meet the new air quality standards in America can also help address climate change.

Housing experts agree there is a coordinated need for strict indoor air quality standards.

As a result, some trade organizations have begun policing themselves and applying their own indoor air quality standards.

Firstly, ambient air quality standards or goals need to be specified.

The first major objective to be attained is that of the air quality standards, to be met by 2015.

Attainment of federal and state ambient air quality standards.

But an unusually large number of the state's power generators were shut down for maintenance or to comply with air quality standards.

Many cities had separate ethanol requirements due to non-attainment of federal air quality standards.

"I think it shows that Colorado is at long last getting serious about meeting air quality standards and is willing to take pioneering steps."

Congress had been setting air quality standards for 20 years, but the states had been falling short.

President Clinton approved more stringent metropolitan air quality standards on Wednesday.

Many sources contribute to levels of fine particle pollution and ozone that exceed national air quality standards.

EPA strengthened the air quality standards for particle pollution in 2006.

And, indeed, in Congress the petroleum industry is not arguing that the ambient air quality standard should be changed for smog.

It's true that 135 million Americans live in areas that fail one or more of the six Federal air quality standards.