ABSTRACT
The Environmental Protection Agency (EPA) is continuously working on the development of reference and equivalent methods for measuring key air pollutants. The EPA operates a nationwide air monitoring network to measure six primary air pollutants, including carbon monoxide, lead, sulfur dioxide, ozone, nitrogen dioxide, and particulate matter. EPA researchers are continually evaluating new potential federal reference methods and federal equivalent methods to foster innovation and improved measurement of atmospheric pollutants. The chapter explains the EPA-approved analytical methods and laboratories that water systems must use when analyzing samples to meet federal monitoring requirements or to demonstrate compliance with drinking water regulations. The Framework Directive, and its daughter directives, requires the assessment of the ambient air quality existing in member states on the basis of common methods and criteria. The chapter also summarizes the techniques used for monitoring within the United Kingdom’s national compliance monitoring network, the Automatic Urban and Rural Network.
