North American Society for Trenchless Technology (NASTT)
https://nastt.org/
Western Chapter of NASTT
http://www.westt.org/index.html
Utility Engineering and Surveying Institute (UESI) of the
American Society of Civil Engineers (ASCE)
https://www.asce.org/utility-engineering-and-surveying/utility-engineering-and-surveying-institute/
Ductile Iron Pipe Research Association (DIPRA)
https://www.dipra.org/
Plastics Pipe Institute
https://plasticpipe.org/
Alliance for PE Pipe
http://www.pepipe.org/
National Clay Pipe Institute
https://www.ncpi.org/
American Concrete Pipe Association
https://www.concretepipe.org/
California-Nevada Section of the American Water Works Association (AWWA)
http://www.ca-nv-awwa.org/
American Public Works Association (APWA)
https://www.apwa.net/
PVC Pipe Association
https://www.uni-bell.org/
EPA – Safe Drinking Water Act
https://www.epa.gov/environmental-topics/water-topics
American Society for Testing and Materials (ASTM)
https://www.astm.org/