| 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. Linda Gould | 3/2021* – | Member of N.H. House of Representatives | House Speaker | |||
| Rep. Bruce Cohen | 1/2021* – | Member of N.H. House of Representatives | House Speaker | |||
| Joshua Elliott | 11/2021 | Governor or Designee | Governor | |||
| Rachel Miller | 7/2016 – | State Treasurer or Designee | State Treasurer | |||
| Michele Roberge | 1/2021 – | Public Health Protection Bureau Chief, Div. of Public Health Services; DHHS Service or Designee | DHHS | |||
| Marco Philippon | 12/2018 – | NH Water Works Association | NHWWA | |||
| Bernie Rousseau | 8/2016 – | Public Member with Experience in Treatment or Delivery of Drinking Water | House Speaker | |||
| Andrea Kenter, P.G. | 9/2016 – | Public Member Representing Private Well Owners | Governor | |||
| Rodney Bartlett | 8/2017 – | Public Member | Senate President | |||
| Vacant | 8/2021 – | Fish and Game Department or Designee | F&G | |||
| Robert R. Scott | 8/2017 – | Commissioner of Department of Environmental Services or Designee | NHDES | |||
| Cynthia Harrington | 6/2021 – | Dept. of Resources & Economic Development or Designee | BEA | |||
| Rick Russman | 8/2017 – | State or Regional Land Trust | Governor | |||
| Bruce Breton | 8/2017 – | Member from Town Without Public Drinking Water | Governor | |||
| Rep. William W. Boyd, III | 10/2017 – | Member from Town With Public Drinking Water | Governor | |||
| Jason Gagnon | 9/2019 – | Representative of NH Water Pollution control Association | NHWPCA | |||
| Vacant | 8/2017 – | Business Community | Senate President | |||
| * Coterminous = | Service on Commission and term in office expire together. | |||||