City of Trenton
New Jersey Stormwater BMP Manual / N.J.A.C. 7:8 (capital MS4)
CityNew JerseymediumNeeds reviewCitations verified
This extraction is flagged for quality review.
Compare each cited field to the official PDF before relying on it. What this means
Municipality coverage via NJDEP BMP Manual (Newark/Paterson pattern).
Other manuals in New Jersey: City of Elizabeth, City of Jersey City, City of Newark, City of Paterson, New Jersey, New Jersey Department of Environmental Protection (NJDEP)
Document Metadata
Jurisdiction level
City
No evidence cited
State
New Jersey
No evidence cited
Version / edition
Chapter 5: July 2023; Chapter 9.7: January 2026
No evidence cited
Adoption / effective date
2023-07
No evidence cited
Last revised date
2026-01
No evidence cited
Relationship to state manual
adopts state manual directly
No evidence cited
Design Criteria
Design storm return periods (years)
2-year, 10-year, 100-year
No evidence cited
Water quality volume method
NJDEP Water Quality Design Storm (WQDS): 1.25 inches of rain falling nonuniformly over 2 hours (N.J.A.C. 7:8-5.5). NRCS methodology computes WQDS runoff volume, peak rate, and hydrograph; BMPs such as small-scale bioretention must store/treat the entire WQDS volume.
“Water Quality Design Storm (WQDS): 1.25 inches”
N.J.A.C. 7:8-5.5 / NJDEP BMP Manual
Peak flow calculation method(s)
USDA NRCS methodology (NRCS Runoff Equation and Dimensionless Unit Hydrograph), NRCS Curve Number (CN) method
No evidence cited
Hydrologic/hydraulic software
Not found in document
No evidence cited
Approved BMP categories
Small-scale green infrastructure BMPs, Small-scale bioretention systems, Small-scale infiltration basins, Green roofs, Pervious paving systems, Grass swales, Cisterns, Green Infrastructure MTDs / MTDs
No evidence cited