New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Ws - Division of Water
Chapter Env-Ws 300 - NEW HAMPSHIRE DRINKING WATER RULES
Part Env-Ws 308 - CRITERIA AND PROCEDURES FOR NON-CENTRAL TREATMENT
Section Env-Ws 308.07 - POU Compliance Requirements

(a) The system owner shall collect a sample of untreated water annually in the sampling quarter designated by the department and have the sample analyzed for the contaminant(s) for which the POU device is treating.

(b) The system owner shall collect a treated sample and have the sample tested for the contaminant(s) from each POU device annually in the sampling quarter designed by the department. Samples from up to 5 devices may be composited by the laboratory to which the samples are taken for analysis. If composite samples are tested, samples from the same POU devices shall be composited during each future sampling event.

(c) If the results of a composite sample show contaminant levels greater than the expected treatment efficiency of the device, each individual POU device shall be sampled within 14 days of receipt of the composite sample data results.

(d) A treated water sample shall be taken within 14 days of the connection whenever any new device is installed or when a new service customer is connected to the system.