- Author: American Water Works Association
- Language: English
- Year: 2014
- Author: Association American Water Works
- Language: English
- Year: 2013
- Author: American Society of Civil Engineers
- Language: English
- Year: 2012
- Author: American Society of Civil Engineers
- Language: English
- Year: 2013
- Author: Water Environment Federation
- Language: English
- Year: 2008