The O/O of a PWS subject to this part at which water is treated by conventional filtration or direct filtration and spent backwash water, thickener supernatant, or liquids from dewatering processes are recycled shall comply with 40 CFR § 141.76.
N.H. Code Admin. R. Env-Dw 716.07
#9620, eff 1-1-10 (See Revision Note #2 at chapter heading for Env-Dw 700)