| MEMBER | TERM | RESPRESENTING | APPOINTED BY | |||
| Senator Chuck Morse, Chair | 3/2016* – | Member of N.H. Senate | Senate President | |||
| Senator Tom Sherman, Vice Chair | 12/2018* – | Member of N.H. Senate | Senate President | |||
| Rep. Deborah Hobson , Clerk | 1/2019* – | Member of N.H. House of Representatives | House Speaker | |||
| Rep. Kevin Maes | 1/2019* – | Member of N.H. House of Representatives | House Speaker | |||
| Clark B. Freise | 6/2017 – | Governor or Designee | Governor | |||
| Rachel Miller | 7/2016 – | State Treasurer or Designee | State Treasurer | |||
| Lisa Morris | 8/2017 – | Director of the Div. of Public Health Services; DHHS Service or Designee | HHS | |||
| Marco Philippon | 12/2018 – 12/2020 | NH Water Works Association | NHWWA | |||
| Bernie Rousseau | 8/2016 – 8/2018 | Public Member with Experience in Treatment or Delivery of Drinking Water | House Speaker | |||
| Andrea Kenter, P.G. | 9/2016 – 9/2018 | Public Member Representing Private Well Owners | Governor | |||
| Rodney Bartlett | 8/2017 – 8/2019 | Public Member | Senate President | |||
| Paul Sanderson | 8/2017 – | Executive Director of Fish and Game Department or Designee | F&G | |||
| Robert R. Scott | 8/2017 – | Commissioner of Department of Environmental Services or Designee | DES | |||
| Christopher S. Way | 8/2017 – | Director of Economic Development; Dept. of Resources & Economic Development or Designee | BEA | |||
| Rick Russman | 8/2017 – 8/2019 | State or Regional Land Trust | Governor | |||
| Bruce Breton | 8/2017 – 8/2019 | Member from Town With Private/Well Drinking Water | Governor | |||
| William W. Boyd, III | 8/2017 – 8/2019 | Member from Town With Public Drinking Water | Governor | |||
| Tim Vadney, P.E. | 8/2017 – 8/2019 | NH Water Pollution Control Association | NHWPCA | |||
| Dorothy Kurtz | 8/2017 – 8/2019 | Business Community | Senate President | |||
| * Coterminous = | Service on Commission and term in office expire together. | |||||