Our knowledge of the quality of the water in the river is largely dependent on our volunteer samplers. Stations are located at major bridges up and down the watershed. Sampling takes place twice a month during June, July, August and September. Training and equipment provided. To volunteer, contact us at 603-659-9363 or email

Data from sampling is compiled by the NH Department of Environmental Services through the Volunteer River Assessment Program (VRAP). More information about the program can be found here.