21 Stormwater Mgmt Report_082025

Future/Projected Precipitation Adjustment Factors County Atlantic Bergen Burlington Camden Cape May Cumberland Essex Gloucester Hudson Hunterdon Mercer Middlesex Monmouth Morris Ocean Passaic Salem Somerset Sussex Union Warren 2-year Design Storm NOAA Adjustment Future Atlas 14 Factor (inches) (inches) 3.31 1.22 4.04 3.34 1.20 4.01 3.36 1.17 3.93 3.31 1.18 3.91 3.25 1.21 3.93 3.27 1.20 3.92 3.44 1.19 4.09 3.29 1.19 3.92 3.31 1.19 3.94 3.38 1.19 4.02 3.31 1.16 3.84 3.35 1.19 3.99 3.38 1.19 4.02 3.54 1.23 4.35 3.42 1.18 4.04 3.47 1.21 4.20 3.26 1.20 3.91 3.34 1.19 3.97 3.22 1.24 3.99 3.39 1.20 4.07 3.34 1.20 4.01 10-year Design Storm NOAA Adjustment Future Atlas 14 Factor (inches) (inches) 5.16 1.24 6.40 5.07 1.23 6.24 5.18 1.18 6.11 5.06 1.22 6.17 5.07 1.24 6.29 5.09 1.21 6.16 5.22 1.22 6.37 5.05 1.23 6.21 5.02 1.19 5.97 5.00 1.23 6.15 5.01 1.17 5.86 5.12 1.21 6.20 5.23 1.19 6.22 5.24 1.28 6.71 5.33 1.19 6.34 5.23 1.27 6.64 5.00 1.23 6.15 5.01 1.24 6.21 4.70 1.29 6.06 5.17 1.23 6.36 4.89 1.25 6.11 25-year Design Storm* NOAA Adjustment Future Atlas 14 Factor* (inches) (inches) 6.46 1.27 8.21 6.28 1.26 7.94 6.45 1.22 7.84 6.28 1.27 7.96 6.34 1.26 7.99 6.37 1.26 8.03 6.44 1.25 8.02 6.29 1.27 8.01 6.19 1.20 7.41 6.09 1.28 7.82 6.19 1.22 7.55 6.36 1.24 7.91 6.53 1.20 7.86 6.37 1.35 8.59 6.68 1.20 8.00 6.43 1.33 8.53 6.22 1.25 7.77 6.15 1.32 8.11 5.72 1.35 7.73 6.42 1.27 8.16 5.93 1.30 7.68 100-year Design Storm NOAA Adjustment Future Atlas 14 Factor (inches) (inches) 8.90 1.39 12.37 8.47 1.37 11.60 8.81 1.32 11.63 8.52 1.39 11.84 8.73 1.32 11.52 8.76 1.39 12.18 8.66 1.33 11.52 8.55 1.41 12.06 8.31 1.23 10.22 8.03 1.42 11.40 8.33 1.36 11.33 8.63 1.33 11.48 8.94 1.26 11.26 8.35 1.46 12.19 9.20 1.24 11.41 8.62 1.50 12.93 8.45 1.32 11.15 8.21 1.48 12.15 7.58 1.50 11.37 8.69 1.35 11.73 7.82 1.37 10.71 County Atlantic Bergen Burlington Camden Cape May Cumberland Essex Gloucester Hudson Hunterdon Mercer Middlesex Monmouth Morris Ocean Passaic Salem Somerset Sussex Union Warren * Note - NJAC 7:8 & 7:13 do not contain adjustment factors for the 25-year storm. The factors listed have been obtained from NJ Extreme Precipitation Projection Tool (https://njprojectedprecipitationchanges.com/) 9/2023