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 381.23 - Number of Water Quality Parameter Samples

(a) A system owner shall collect 2 tap samples for applicable water quality parameters during each monitoring period specified under Env-Ws 381.24 through Env-Ws 381.27 pursuant to Table 381-2 below:

Table 381-2

Number of Sites for Water Quality Parameters

(b) Except as provided in (c) below, a system owner shall collect 2 samples for each applicable water quality parameter at each entry point to the distribution system during each monitoring period specified in Env-Ws 381.24. During each monitoring period specified in Env-Ws 381.25 through Env-Ws 381.27, a system owner shall collect one sample for each applicable water quality control parameter at each entry point to the distribution system.

(c) The owner of a system which obtains its water supply from ground water may limit entry point sampling described in (b) above to those entry points that are representative of water quality and treatment conditions throughout the system.

(d) If water from untreated ground water sources mixes with water from treated ground water sources, the system owner shall monitor for water quality parameters both at representative entry points receiving treatment and representative entry points receiving no treatment.

(e) Prior to the start of any monitoring under (c) above, the system owner shall provide to the department written information identifying the selected entry points and documentation, including information on seasonal variability sufficient to demonstrate that the sites are representative of water quality and treatment conditions throughout the system.