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 347 - BEST AVAILABLE TREATMENT - ORGANICS
Section Env-Ws 347.05 - BAT Disinfection Byproducts
Universal Citation: NH Admin Rules Env-Ws 347.05
Current through Register No. 13, March 27, 2025
The technology listed in Table 347-3 below shall be the best technology, treatment technique, or other means available for achieving compliance with the MCL level for disinfection byproducts as specified in Env-Ws 315.03:
Table 347-3
BAT For Disinfection Byproducts
| Disinfection Byproduct | Best available technology |
| TTHM | Enhanced coagulation or enhanced softening or GAC10, with chlorine as the primary and residual disinfectant |
| HAA5 | Enhanced coagulation or enhanced softening or GAC10, with chlorine as the primary and residual disinfectant. |
| Bromate | Control of ozone treatment process to reduce production of bromate. |
| Chlorite | Control of treatment processes to reduce disinfectant demand and control of disinfection treatment processes to reduce disinfectant levels. |
(See Revision Note at chapter heading Env-Ws 300) #6521, eff 6-4-97; ss by #7735, eff 8-2-02; ss by #8497, eff 11-30-05 (formerly Env-Ws 347.701)
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