New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1000 - SUBDIVISIONS; INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
Part Env-Wq 1009 - SEWER LINES
Section Env-Wq 1009.05 - Calculating Infiltration

Universal Citation: NH Admin Rules Env-Wq 1009.05

Current through Register No. 13, March 27, 2025

Sewer and manhole infiltration shall be figured into the flow figures established by Env-Wq 1008.03 for sewers over 100 feet long as follows:

(a) Pipe infiltration shall be figured as 300 gallons per inch diameter per mile per day; and

(b) Manhole infiltration shall be figured as one gallon per vertical foot per day.

(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08; ss by #9904-A, eff 4-16-11

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