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 345 - BEST AVAILABLE TECHNOLOGY, TREATMENT TECHNIQUES, OR OTHER MEANS GENERALLY AVAILABLE
Section Env-Ws 345.01 - BAT for Microbiological

Universal Citation: NH Admin Rules Env-Ws 345.01

Current through Register No. 13, March 27, 2025

(a) The following shall be the best technology, treatment techniques, or other means available for achieving compliance with the MCL for total coliforms specified in Env-Ws 313.01:

(1) Protection of wells from contamination by coliforms by appropriate placement and construction as required in Env-Ws 370, Env-Ws 372, Env-Ws 373, Env-Ws 378, and Env-Ws 379;

(2) Maintenance of a disinfectant residual throughout the distribution system;

(3) Proper maintenance of the distribution system, including appropriate pipe replacement and repair procedures, main flushing programs, proper operation and maintenance of storage tanks and reservoirs, and continual maintenance of positive water pressure in all parts of the distribution systems;

(4) Filtration or disinfection, or both, of surface water, or disinfection of ground water using strong oxidants such as chlorine, chlorine dioxide, or ozone; and

(5) The development and implementation of a wellhead protection program in accordance with applicable provisions of Env-Ws 378, Env-Ws 379, and Env-Ws 421.

(b) No variance or exemption from the MCL for bacteria specified in Env-Ws 313.01 shall be permitted.

(c) No variances from the requirements of Env-Ws 380 concerning surface water filtration and disinfection shall be permitted. The granting of an exemption shall be specified in Env-Ws 380.26.

(See Revision Note at chapter heading Env-Ws 300) #6521, eff 6-4-97; ss by #8360, INTERIM, eff 6-4-05, EXPIRES: 12 -1-05 ; ss by #8497, eff 11-30-05

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