Freehold Township, NJ Environmental Rules: Stormwater Management (2026)

Section 190-80, last amended by Ord. No. C. 5:21, plus any major development the Township itself undertakes. Its policy statement calls for green infrastructure best management practices and low-impact development to maintain natural hydrology, reduce runoff volume and erosion, and encourage infiltration and recharge, with minimum erosion-control standards set by the state Soil and Sediment Control Act. On groundwater recharge, the design engineer must show through hydrologic and hydraulic analysis either that the site keeps 100% of the average annual pre-construction recharge volume, or that the increased runoff volume from the projected two-year storm is infiltrated; certain contaminated or high-pollutant-loading areas are barred from recharge entirely.

On water quality, projects triggering an increase of a quarter-acre or more of regulated motor vehicle surface must remove 80% of the total suspended solids load, expressed as an annual average, from runoff off that added surface, using green infrastructure practices such as dry wells, sand filters, bioretention systems, subsurface gravel wetlands or wet ponds drawn from the tables in the section, or an alternative measure the design engineer justifies to the Township and reports to the state Department of Environmental Protection. The section states that where its standards conflict with any other Township ordinance, rule or law, the more restrictive standard controls, and it does not relieve an applicant of the need for any other required permit or approval.