The Pittsburgh Post-Gazette recently completed an amazing series of reports on the cancer clusters in Western Pennsylvania. Here is a sample from Day 3 of their 8-day series.

A more accurate and thorough air-monitoring network is necessary to assess human health risks and support enforcement of environmental regulations. And that’s especially true in rural areas where few monitors now exist.

“We do not have the kind of robust monitoring network we need nationally,” said S. William Becker, executive director of the National Association of Clean Air Agencies. “And we never have enough monitors in environmental justice areas, poorer areas, and rural areas that cannot protect themselves as well.”

State Department of Environmental Protection documents show that only seven of the 18 ambient air-quality monitors in 13 western counties measure levels of nearly invisible particulates — known as PM2.5 because they are smaller than 2.5 micrometers — that can be inhaled deeply into human lungs and cause or aggravate a variety of health problems, including asthma and cardiac and respiratory disease.

More . . .