A measurement of sound approximating the sensitivity of the human ear, used to note the intensity or annoyance level of sounds.

The cost a utility would incur to generate the next increment of electric capacity using its own resources; many landfill gas projects' buy back rates are based on avoided costs.

Informal meeting at a public location where interested citizens can talk with EPA and state officials on a one-to-one basis.

A chemical or agent that lures insects or other pests by stimulating their sense of smell.

Wearing or grinding down of a substance by friction. Dust from such processes contributes to air pollution.

An international organization representing boards which certify the operators of waterworks and wastewater facilities.

An area considered to have air quality as good as or better than the national ambient air quality standards as defined in the Clean Air Act. An area may be an attainment area for one pollutant and a n [..]

The ability of a body of water to purify itself of pollutants.

The capacity of a natural body of water to receive wastewaters or toxic materials without deleterious effects and without damage to aquatic life or humans who consume the water.

A test for a specific chemical, microbe, or effect.