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 381.24 - Initial Monitoring of Water Quality Parameters

Universal Citation: NH Admin Rules Env-Ws 381.24

Current through Register No. 13, March 27, 2025

(a) A large water system owner shall measure the applicable water quality parameters as specified in (c) below, at taps and at each entry point to the distribution system during each 6-month monitoring period specified in Env-Ws 381.18.

(b) A small or medium-sized system owner shall measure the applicable water quality control parameters at the locations specified in (c) below during each 6-month monitoring period specified in Env-Ws 381.18 during which the system exceeds the lead or copper action level.

(c) Sample parameter(s) collected at the taps shall include:

(1) pH;

(2) Alkalinity;

(3) Orthophosphate, when an inhibitor containing a phosphate compound is used;

(4) Silica, when an inhibitor containing a silicate compound is used;

(5) Calcium;

(6) Conductivity;

(7) Water temperature; and

(8) Any other water quality parameter as determined by the department pursuant to Env-Ws 381.09(f).

(d) At each entry point to the distribution system, sampling parameters shall include all of the parameters listed in (c) above.

(See Revision Note at chapter heading for Env-Ws 300) #6521, eff 6-4-97, ss by #7734, eff 8-2-02

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