New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1500 - ALTERATION OF TERRAIN
Part Env-Wq 1508 - PERMANENT METHODS FOR PROTECTING WATER QUALITY
Section Env-Wq 1508.13 - Pretreatment Practices: Vegetated Filter Strips

Universal Citation: NH Admin Rules Env-Wq 1508.13

Current through Register No. 13, March 27, 2025

Vegetated filter strips shall comply with the following:

(a) The vegetative cover type of the filter strip shall be forest, meadow, or a combination of forest and meadow;

(b) The overland flow length to the filter strip shall not exceed 75 feet for impervious surfaces and 150 feet for pervious surfaces;

(c) Longitudinal slopes shall be no less than 0.5 percent and no greater than 15 percent; and

(d) The vegetated filter strip shall be at least 25 feet long and as wide as the area draining to the strip.

(See Revision Note #1 at chapter heading for Env-Wq 1500) #9343, eff 1-1-09

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