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 381 - CORROSION CONTROL TREATMENT, LEAD AND COPPER ACTION LEVELS
Section Env-Ws 381.22 - Sample Collection Methods for Monitoring Water Quality Parameters

(a) The owner of a small, medium, or large public water system exceeding the lead or copper action level shall monitor water quality parameters in addition to lead and copper in accordance Env-Ws 381.22 through Env-Ws 381.27.

(b) Tap samples shall be representative of water quality throughout the distribution system taking into account the number of persons served, the different sources of water, the different treatment methods employed by the system, and seasonal variability. Tap sampling as specified by Env-Ws 381.22 through Env-Ws 381.27 shall not be required to be conducted at taps targeted for lead and copper sampling under Env-Ws 381.15.

(c) A system owner may conduct tap sampling for water quality parameters at sites used for coliform sampling under Env-Ws 325.01.

(d) Samples collected at the entry point(s) to the distribution system shall be from locations representative of each source after treatment. If a system draws water from more than one source and the sources are combined before distribution, the system owner shall sample at an entry point to the distribution

system during periods of normal operating conditions, that is, when water is representative of all sources being used.