"7Q10" means the lowest average flow rate for a period of 7 consecutive days on an annual basis with an expected recurrence interval of once in every 10 years, determined at a fixed location on a river or stream, and expressed in terms of volume per unit of time.
N.H. Admin. Code § Env-Wq 1902.01
#7901, eff 5-29-03 (See Revision Note at chapter heading for Env-Wq 1900) (formerly Env-Ws 1902.01); ss by #9936, eff 5-28-11