N.H. Code Admin. R. We 602.03
A person who completes construction of a new well, installs a new pump in a well, or reinstalls an existing pump in a well shall chlorinate the well to a minimum concentration of 50 parts per million for a minimum of 4 hours upon completion of such construction or installation.
Source. (See Revision Note at chapter heading for We 600) #12083 eff 3-1-17