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American Public Gas Association
<http://www.apga.org>
American Public Power Association
<http://www.appanet.org>
APPA is the national trade association representing the interests of more
than 2,000 municipal and other state and local government-owned electric
utilities.
American Public Transit Association
<http://www.apta.com>
The American Public Transit Association (APTA) has been representing the
transit industry for over 100 years, since 1882. APTA members serve the
public interest by providing safe, efficient and economical transit services,
and by improving those services to meet national energy, environmental,
and financial concerns.
American Public Works Association
<http://www.apwa.net>
Association of Metropolitan Sewerage
Agencies
<http://www.amsa-cleanwater.org>
Association of Metropolitan Water Agencies
<http://www.amwa.net>
AWWA: American Water Works Association
<http://www.awwa.org>
Public Utilities Risk Management Association
<http://www.purma.org> | 
