{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.2(f)", "topic": "Table 5-1 Green Infrastructure BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff Quantity"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-1 Green Infrastructure BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff Quantity\n\n| Best
Management
Practice | Stormwater
Runoff Quality
TSS removal
rate (percent) | Stormwater
Runoff Quantity | Groundwater
Recharge | Minimum
separation from
seasonal high-
water table
(feet) |\n| --- | --- | --- | --- | --- |\n| Cistern | 0 | Yes | No | - |\n| Dry Well(a) | 0 | No | Yes | 2 |\n| Grass Swale | 50 or less | No | No | 2(e)
1(f) |\n| Green Roof | 0 | Yes | No | - |\n| Manufactured
Treatment
Device(a) (g) | 50 or 80 | No | No | Dependent upon
the device |\n| Pervious Paving
System(a) | 80 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Bioretention
Basin(a) | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Infiltration
Basin(a) | 80 | Yes | Yes | 2 |\n| Small-Scale
Sand Filter(a) (b) | 80 | Yes | Yes | 2 |\n| Vegetative Filter
Strip | 60-80 | No | No | - |\n\nSource context and notes:\n\nSource revision: Last amended September 21, 2026.\n\n(f) The tables below summarize the ability of stormwater best management practices identified and\n\ndescribed in the New Jersey Stormwater Best Management Practices Manual to satisfy the green infrastructure, groundwater recharge, stormwater runoff quality, and stormwater runoff quantity standards specified in this chapter. When designed in accordance with the New Jersey Stormwater Best Management Practices Manual and this chapter, the stormwater management measures listed in Tables 5-1, 5-2, and 5-3 shall be presumed to be capable of providing stormwater controls for the design and performance standards as outlined in the tables below. Upon amendment of the New Jersey Stormwater Best Management Practices Manual to reflect additions or deletions of BMPs meeting these standards, or changes in the presumed performance of BMPs designed in accordance with the New Jersey Stormwater BMP Manual, the Department shall publish in the New Jersey Register a notice of administrative change revising the applicable table.\n\nTable 5-1 Green Infrastructure BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff Quantity\n\n\n| Best
Management
Practice | Stormwater
Runoff Quality
TSS removal
rate (percent) | Stormwater
Runoff Quantity | Groundwater
Recharge | Minimum
separation from
seasonal high-
water table
(feet) |\n| --- | --- | --- | --- | --- |\n| Cistern | 0 | Yes | No | - |\n| Dry Well(a) | 0 | No | Yes | 2 |\n| Grass Swale | 50 or less | No | No | 2(e)
1(f) |\n| Green Roof | 0 | Yes | No | - |\n| Manufactured
Treatment
Device(a) (g) | 50 or 80 | No | No | Dependent upon
the device |\n| Pervious Paving
System(a) | 80 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Bioretention
Basin(a) | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Infiltration
Basin(a) | 80 | Yes | Yes | 2 |\n| Small-Scale
Sand Filter(a) (b) | 80 | Yes | Yes | 2 |\n| Vegetative Filter
Strip | 60-80 | No | No | - |\n\n\nTable 5-2 Green Infrastructure BMPs for Stormwater Runoff Quantity (or for Groundwater Recharge and/or Stormwater Runoff Quality with a Waiver or Variance from N.J.A.C. 7:8-5.3)\n\n| Best Management Practice | Stormwater
Runoff
Quality TSS
removal rate
(percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table (feet) |\n| --- | --- | --- | --- | --- |\n| Bioretention System | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Infiltration Basin | 80 | Yes | Yes | 2 |\n| Sand Filter(b) | 80 | Yes | Yes | 2 |\n| Standard Constructed
Wetland | 90 | Yes | No | N/A |\n| Wet Pond(d) | 50-90 | Yes | No | N/A |\n\n| Table 5-3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff
Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3 | | | | |\n| --- | --- | --- | --- | --- |\n| Best Management Practice | Stormwater
Runoff
Quality
TSS removal
rate (percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table
(feet) |\n| Blue Roof | 0 | Yes | No | N/A |\n| Extended Detention Basin | 40-60 | Yes | No | 1 |\n| Manufactured Treatment
Device(h) | 50 or 80 | No | No | Dependent
upon the
device |\n| Sand Filter(c) | 80 | Yes | No | 1 |\n| Subsurface Gravel Wetland | 90 | No | No | 1 |\n| Wet pond | 50-90 | Yes | No | N/A |\n\nTable notes:\n\n(a) subject to the applicable contributory drainage area limitation specified at N.J.A.C. 7:8-5.3(b);\n\n(b) designed to infiltrate into the subsoil;\n\n(c) designed with underdrains;\n\n(d) designed to maintain at least a 10-foot wide area of native vegetation along at least 50 percent of\n\nthe shoreline and to include a stormwater runoff retention component designed to capture stormwater runoff for beneficial reuse, such as irrigation;\n\n(e) designed with a slope of less than two percent;\n\n(f) designed with a slope of equal to or greater than two percent;\n\n(g) manufactured treatment devices that meet the definition of green infrastructure at N.J.A.C. 7:8-1.2;\n\n(h) manufactured treatment devices that do not meet the definition of green infrastructure at N.J.A.C.\n\n7:8-1.2.\n\n[Source PDF](SOURCE.pdf#page=28)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.2(f)", "topic": "Table 5-2 Green Infrastructure BMPs for Stormwater Runoff Quantity (or for Groundwater Recharge and/or Stormwater Runoff Quality with a Waiver or Variance from N.J.A.C. 7:8-5.3)"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-2 Green Infrastructure BMPs for Stormwater Runoff Quantity (or for Groundwater Recharge and/or Stormwater Runoff Quality with a Waiver or Variance from N.J.A.C. 7:8-5.3)\n\n| Best Management Practice | Stormwater
Runoff
Quality TSS
removal rate
(percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table (feet) |\n| --- | --- | --- | --- | --- |\n| Bioretention System | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Infiltration Basin | 80 | Yes | Yes | 2 |\n| Sand Filter(b) | 80 | Yes | Yes | 2 |\n| Standard Constructed
Wetland | 90 | Yes | No | N/A |\n| Wet Pond(d) | 50-90 | Yes | No | N/A |\n\nSource context and notes:\n\n| Pervious Paving
System(a) | 80 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Bioretention
Basin(a) | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Small-Scale
Infiltration
Basin(a) | 80 | Yes | Yes | 2 |\n| Small-Scale
Sand Filter(a) (b) | 80 | Yes | Yes | 2 |\n| Vegetative Filter
Strip | 60-80 | No | No | - |\n\nTable 5-2 Green Infrastructure BMPs for Stormwater Runoff Quantity (or for Groundwater Recharge and/or Stormwater Runoff Quality with a Waiver or Variance from N.J.A.C. 7:8-5.3)\n\n\n| Best Management Practice | Stormwater
Runoff
Quality TSS
removal rate
(percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table (feet) |\n| --- | --- | --- | --- | --- |\n| Bioretention System | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Infiltration Basin | 80 | Yes | Yes | 2 |\n| Sand Filter(b) | 80 | Yes | Yes | 2 |\n| Standard Constructed
Wetland | 90 | Yes | No | N/A |\n| Wet Pond(d) | 50-90 | Yes | No | N/A |\n\n\n| Table 5-3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff
Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3 | | | | |\n| --- | --- | --- | --- | --- |\n| Best Management Practice | Stormwater
Runoff
Quality
TSS removal
rate (percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table
(feet) |\n| Blue Roof | 0 | Yes | No | N/A |\n| Extended Detention Basin | 40-60 | Yes | No | 1 |\n| Manufactured Treatment
Device(h) | 50 or 80 | No | No | Dependent
upon the
device |\n| Sand Filter(c) | 80 | Yes | No | 1 |\n| Subsurface Gravel Wetland | 90 | No | No | 1 |\n| Wet pond | 50-90 | Yes | No | N/A |\n\nNotes to Tables 5-1, 5-2, and 5-3:\n\nTable notes:\n\nTable notes:\n\n(a) subject to the applicable contributory drainage area limitation specified at N.J.A.C. 7:8-5.3(b);\n\n(b) designed to infiltrate into the subsoil;\n\n(c) designed with underdrains;\n\n(d) designed to maintain at least a 10-foot wide area of native vegetation along at least 50 percent of\n\nthe shoreline and to include a stormwater runoff retention component designed to capture stormwater runoff for beneficial reuse, such as irrigation;\n\n(e) designed with a slope of less than two percent;\n\n(f) designed with a slope of equal to or greater than two percent;\n\n(g) manufactured treatment devices that meet the definition of green infrastructure at N.J.A.C. 7:8-1.2;\n\n(h) manufactured treatment devices that do not meet the definition of green infrastructure at N.J.A.C.\n\n7:8-1.2.\n\n[Source PDF](SOURCE.pdf#page=28)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.2(f)", "topic": "Table 5-3 BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-3 BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3\n\n| Table 5-3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff
Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3 | | | | |\n| --- | --- | --- | --- | --- |\n| Best Management Practice | Stormwater
Runoff
Quality
TSS removal
rate (percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table
(feet) |\n| Blue Roof | 0 | Yes | No | N/A |\n| Extended Detention Basin | 40-60 | Yes | No | 1 |\n| Manufactured Treatment
Device(h) | 50 or 80 | No | No | Dependent
upon the
device |\n| Sand Filter(c) | 80 | Yes | No | 1 |\n| Subsurface Gravel Wetland | 90 | No | No | 1 |\n| Wet pond | 50-90 | Yes | No | N/A |\n\nSource context and notes:\n\n| Best Management Practice | Stormwater
Runoff
Quality TSS
removal rate
(percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table (feet) |\n| --- | --- | --- | --- | --- |\n| Bioretention System | 80 or 90 | Yes | Yes(b)
No(c) | 2(b)
1(c) |\n| Infiltration Basin | 80 | Yes | Yes | 2 |\n| Sand Filter(b) | 80 | Yes | Yes | 2 |\n| Standard Constructed
Wetland | 90 | Yes | No | N/A |\n| Wet Pond(d) | 50-90 | Yes | No | N/A |\n\n\n| Table 5-3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or Stormwater Runoff
Quantity only with a Waiver or Variance from N.J.A.C. 7:8-5.3 | | | | |\n| --- | --- | --- | --- | --- |\n| Best Management Practice | Stormwater
Runoff
Quality
TSS removal
rate (percent) | Stormwater
Runoff
Quantity | Groundwater
Recharge | Minimum
separation
from seasonal
high-water
table
(feet) |\n| Blue Roof | 0 | Yes | No | N/A |\n| Extended Detention Basin | 40-60 | Yes | No | 1 |\n| Manufactured Treatment
Device(h) | 50 or 80 | No | No | Dependent
upon the
device |\n| Sand Filter(c) | 80 | Yes | No | 1 |\n| Subsurface Gravel Wetland | 90 | No | No | 1 |\n| Wet pond | 50-90 | Yes | No | N/A |\n\n\nNotes to Tables 5-1, 5-2, and 5-3:\n\nTable notes:\n\n(a) subject to the applicable contributory drainage area limitation specified at N.J.A.C. 7:8-5.3(b);\n\nTable notes:\n\n(a) subject to the applicable contributory drainage area limitation specified at N.J.A.C. 7:8-5.3(b);\n\n(b) designed to infiltrate into the subsoil;\n\n(c) designed with underdrains;\n\n(d) designed to maintain at least a 10-foot wide area of native vegetation along at least 50 percent of\n\nthe shoreline and to include a stormwater runoff retention component designed to capture stormwater runoff for beneficial reuse, such as irrigation;\n\n(e) designed with a slope of less than two percent;\n\n(f) designed with a slope of equal to or greater than two percent;\n\n(g) manufactured treatment devices that meet the definition of green infrastructure at N.J.A.C. 7:8-1.2;\n\n(h) manufactured treatment devices that do not meet the definition of green infrastructure at N.J.A.C.\n\n7:8-1.2.\n\n[Source PDF](SOURCE.pdf#page=28)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.3(b)", "topic": "Table 2"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 2\n\n| Best Management Practice | Maximum Contributory Drainage Area |\n| --- | --- |\n| 1. Dry Well | 1 acre |\n| 2. Manufactured Treatment Device | 2.5 acres |\n| 3. Pervious Paving Systems | Area of additional inflow cannot exceed three times the
area occupied by the BMP |\n| 4. Small-scale Bioretention Systems | 2.5 acres |\n| 5. Small-scale Infiltration Basin | 2.5 acres |\n| 6. Small-scale Sand Filter | 2.5 acres |\n\nSource context and notes:\n\n# N.J.A.C. 7:8 - Stormwater Management Rules (September 21, 2026)\n\nSource revision: Last amended September 21, 2026.\n\n(b) Except as provided at (f) through (j) below, to satisfy the groundwater recharge and stormwater\n\nrunoff quality standards at N.J.A.C. 7:8-5.4 and 5.5, the design engineer shall utilize green infrastructure BMPs identified in Table 5-1 at N.J.A.C. 7:8-5.2(f) and/or an alternative stormwater management measure approved in accordance with N.J.A.C. 7:8-5.2(g). The following green infrastructure BMPs are subject to the following maximum contributory drainage area limitations:\n\n\n| Best Management Practice | Maximum Contributory Drainage Area |\n| --- | --- |\n| 1. Dry Well | 1 acre |\n| 2. Manufactured Treatment Device | 2.5 acres |\n| 3. Pervious Paving Systems | Area of additional inflow cannot exceed three times the
area occupied by the BMP |\n| 4. Small-scale Bioretention Systems | 2.5 acres |\n| 5. Small-scale Infiltration Basin | 2.5 acres |\n| 6. Small-scale Sand Filter | 2.5 acres |\n\n\n\n[Source PDF](SOURCE.pdf#page=33)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.5(d)", "topic": "Table 5-4: Water Quality Design Storm Distribution"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-4: Water Quality Design Storm Distribution\n\n| Time
(Minutes) | Cumulative
Rainfall
(Inches) | Time
(Minutes) | Cumulative
Rainfall
(Inches) | Time
(Minutes) | Cumulative
Rainfall
(Inches) |\n| --- | --- | --- | --- | --- | --- |\n| 1 | 0.00166 | 41 | 0.1728 | 81 | 1.0906 |\n| 2 | 0.00332 | 42 | 0.1796 | 82 | 1.0972 |\n| 3 | 0.00498 | 43 | 0.1864 | 83 | 1.1038 |\n| 4 | 0.00664 | 44 | 0.1932 | 84 | 1.1104 |\n| 5 | 0.00830 | 45 | 0.2000 | 85 | 1.1170 |\n| 6 | 0.00996 | 46 | 0.2117 | 86 | 1.1236 |\n| 7 | 0.01162 | 47 | 0.2233 | 87 | 1.1302 |\n| 8 | 0.01328 | 48 | 0.2350 | 88 | 1.1368 |\n| 9 | 0.01494 | 49 | 0.2466 | 89 | 1.1434 |\n| 10 | 0.01660 | 50 | 0.2583 | 90 | 1.1500 |\n| 11 | 0.01828 | 51 | 0.2783 | 91 | 1.1550 |\n| 12 | 0.01996 | 52 | 0.2983 | 92 | 1.1600 |\n| 13 | 0.02164 | 53 | 0.3183 | 93 | 1.1650 |\n| 14 | 0.02332 | 54 | 0.3383 | 94 | 1.1700 |\n| 15 | 0.02500 | 55 | 0.3583 | 95 | 1.1750 |\n| 16 | 0.03000 | 56 | 0.4116 | 96 | 1.1800 |\n| 17 | 0.03500 | 57 | 0.4650 | 97 | 1.1850 |\n| 18 | 0.04000 | 58 | 0.5183 | 98 | 1.1900 |\n| 19 | 0.04500 | 59 | 0.5717 | 99 | 1.1950 |\n| 20 | 0.05000 | 60 | 0.6250 | 100 | 1.2000 |\n| 21 | 0.05500 | 61 | 0.6783 | 101 | 1.2050 |\n| 22 | 0.06000 | 62 | 0.7317 | 102 | 1.2100 |\n| 23 | 0.06500 | 63 | 0.7850 | 103 | 1.2150 |\n| 24 | 0.07000 | 64 | 0.8384 | 104 | 1.2200 |\n| 25 | 0.07500 | 65 | 0.8917 | 105 | 1.2250 |\n| 26 | 0.08000 | 66 | 0.9117 | 106 | 1.2267 |\n| 27 | 0.08500 | 67 | 0.9317 | 107 | 1.2284 |\n| 28 | 0.09000 | 68 | 0.9517 | 108 | 1.2300 |\n| 29 | 0.09500 | 69 | 0.9717 | 109 | 1.2317 |\n| 30 | 0.10000 | 70 | 0.9917 | 110 | 1.2334 |\n| 31 | 0.10660 | 71 | 1.0034 | 111 | 1.2351 |\n| 32 | 0.11320 | 72 | 1.0150 | 112 | 1.2367 |\n| 33 | 0.11980 | 73 | 1.0267 | 113 | 1.2384 |\n| 34 | 0.12640 | 74 | 1.0383 | 114 | 1.2400 |\n| 35 | 0.13300 | 75 | 1.0500 | 115 | 1.2417 |\n| 36 | 0.13960 | 76 | 1.0568 | 116 | 1.2434 |\n| 37 | 0.14620 | 77 | 1.0636 | 117 | 1.2450 |\n| 38 | 0.15280 | 78 | 1.0704 | 118 | 1.2467 |\n| 39 | 0.15940 | 79 | 1.0772 | 119 | 1.2483 |\n| 40 | 0.16600 | 80 | 1.0840 | 120 | 1.2500 |\n\nSource context and notes:\n\n\n(d) The water quality design storm is 1.25 inches of rainfall in two hours. Water quality calculations\n\nshall take into account the distribution of rain from the water quality design storm, as reflected in Table 5-4 below. The calculation of the volume of runoff may take into account the implementation\nof stormwater management measures.\n\nTable 5-4: Water Quality Design Storm Distribution\n\n\n| Time
(Minutes) | Cumulative
Rainfall
(Inches) | Time
(Minutes) | Cumulative
Rainfall
(Inches) | Time
(Minutes) | Cumulative
Rainfall
(Inches) |\n| --- | --- | --- | --- | --- | --- |\n| 1 | 0.00166 | 41 | 0.1728 | 81 | 1.0906 |\n| 2 | 0.00332 | 42 | 0.1796 | 82 | 1.0972 |\n| 3 | 0.00498 | 43 | 0.1864 | 83 | 1.1038 |\n| 4 | 0.00664 | 44 | 0.1932 | 84 | 1.1104 |\n| 5 | 0.00830 | 45 | 0.2000 | 85 | 1.1170 |\n| 6 | 0.00996 | 46 | 0.2117 | 86 | 1.1236 |\n| 7 | 0.01162 | 47 | 0.2233 | 87 | 1.1302 |\n| 8 | 0.01328 | 48 | 0.2350 | 88 | 1.1368 |\n| 9 | 0.01494 | 49 | 0.2466 | 89 | 1.1434 |\n| 10 | 0.01660 | 50 | 0.2583 | 90 | 1.1500 |\n| 11 | 0.01828 | 51 | 0.2783 | 91 | 1.1550 |\n| 12 | 0.01996 | 52 | 0.2983 | 92 | 1.1600 |\n| 13 | 0.02164 | 53 | 0.3183 | 93 | 1.1650 |\n| 14 | 0.02332 | 54 | 0.3383 | 94 | 1.1700 |\n| 15 | 0.02500 | 55 | 0.3583 | 95 | 1.1750 |\n| 16 | 0.03000 | 56 | 0.4116 | 96 | 1.1800 |\n| 17 | 0.03500 | 57 | 0.4650 | 97 | 1.1850 |\n| 18 | 0.04000 | 58 | 0.5183 | 98 | 1.1900 |\n| 19 | 0.04500 | 59 | 0.5717 | 99 | 1.1950 |\n| 20 | 0.05000 | 60 | 0.6250 | 100 | 1.2000 |\n| 21 | 0.05500 | 61 | 0.6783 | 101 | 1.2050 |\n| 22 | 0.06000 | 62 | 0.7317 | 102 | 1.2100 |\n| 23 | 0.06500 | 63 | 0.7850 | 103 | 1.2150 |\n| 24 | 0.07000 | 64 | 0.8384 | 104 | 1.2200 |\n| 25 | 0.07500 | 65 | 0.8917 | 105 | 1.2250 |\n| 26 | 0.08000 | 66 | 0.9117 | 106 | 1.2267 |\n| 27 | 0.08500 | 67 | 0.9317 | 107 | 1.2284 |\n| 28 | 0.09000 | 68 | 0.9517 | 108 | 1.2300 |\n| 29 | 0.09500 | 69 | 0.9717 | 109 | 1.2317 |\n| 30 | 0.10000 | 70 | 0.9917 | 110 | 1.2334 |\n| 31 | 0.10660 | 71 | 1.0034 | 111 | 1.2351 |\n| 32 | 0.11320 | 72 | 1.0150 | 112 | 1.2367 |\n| 33 | 0.11980 | 73 | 1.0267 | 113 | 1.2384 |\n| 34 | 0.12640 | 74 | 1.0383 | 114 | 1.2400 |\n| 35 | 0.13300 | 75 | 1.0500 | 115 | 1.2417 |\n| 36 | 0.13960 | 76 | 1.0568 | 116 | 1.2434 |\n| 37 | 0.14620 | 77 | 1.0636 | 117 | 1.2450 |\n| 38 | 0.15280 | 78 | 1.0704 | 118 | 1.2467 |\n| 39 | 0.15940 | 79 | 1.0772 | 119 | 1.2483 |\n| 40 | 0.16600 | 80 | 1.0840 | 120 | 1.2500 |\n\n\n\n[Source PDF](SOURCE.pdf#page=37)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.7(c)", "topic": "Table 5-5: Current Precipitation Adjustment Factors"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-5: Current Precipitation Adjustment Factors\n\n| County | Current Precipitation Adjustment Factors | | |\n| --- | --- | --- | --- |\n| | 2-year
Design Storm | 10-year
Design Storm | 100-year
Design Storm |\n| Atlantic | 1.01 | 1.02 | 1.03 |\n| Bergen | 1.01 | 1.03 | 1.06 |\n| Burlington | 0.99 | 1.01 | 1.04 |\n| Camden | 1.03 | 1.04 | 1.05 |\n| Cape May | 1.03 | 1.03 | 1.04 |\n| Cumberland | 1.03 | 1.03 | 1.01 |\n| Essex | 1.01 | 1.03 | 1.06 |\n| Gloucester | 1.05 | 1.06 | 1.06 |\n| Hudson | 1.03 | 1.05 | 1.09 |\n| Hunterdon | 1.02 | 1.05 | 1.13 |\n| Mercer | 1.01 | 1.02 | 1.04 |\n| Middlesex | 1.00 | 1.01 | 1.03 |\n| Monmouth | 1.00 | 1.01 | 1.02 |\n| Morris | 1.01 | 1.03 | 1.06 |\n| Ocean | 1.00 | 1.01 | 1.03 |\n| Passaic | 1.00 | 1.02 | 1.05 |\n| Salem | 1.02 | 1.03 | 1.03 |\n| Somerset | 1.00 | 1.03 | 1.09 |\n| Sussex | 1.03 | 1.04 | 1.07 |\n| Union | 1.01 | 1.03 | 1.06 |\n| Warren | 1.02 | 1.07 | 1.15 |\n\nSource context and notes:\n\n\n(NOAA), National Weather Service’s Atlas 14 Point Precipitation Frequency Estimates: NJ, in accordance with the location(s) of the drainage area(s) of the site. This data is available at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nj; and\n\n2. The applicant shall utilize Table 5-5 below, which sets forth the applicable multiplier for the\n\ndrainage area(s) of the site, in accordance with the county or counties where the drainage area(s) of the site is located. Where the major development lies in more than one county, the precipitation values shall be adjusted according to the percentage of the drainage area in each county. Alternately, separate rainfall totals can be developed for each county using the values in the table below.\nTable 5-5: Current Precipitation Adjustment Factors\n\n\n| County | Current Precipitation Adjustment Factors | | |\n| --- | --- | --- | --- |\n| | 2-year
Design Storm | 10-year
Design Storm | 100-year
Design Storm |\n| Atlantic | 1.01 | 1.02 | 1.03 |\n| Bergen | 1.01 | 1.03 | 1.06 |\n| Burlington | 0.99 | 1.01 | 1.04 |\n| Camden | 1.03 | 1.04 | 1.05 |\n| Cape May | 1.03 | 1.03 | 1.04 |\n| Cumberland | 1.03 | 1.03 | 1.01 |\n| Essex | 1.01 | 1.03 | 1.06 |\n| Gloucester | 1.05 | 1.06 | 1.06 |\n| Hudson | 1.03 | 1.05 | 1.09 |\n| Hunterdon | 1.02 | 1.05 | 1.13 |\n| Mercer | 1.01 | 1.02 | 1.04 |\n| Middlesex | 1.00 | 1.01 | 1.03 |\n| Monmouth | 1.00 | 1.01 | 1.02 |\n| Morris | 1.01 | 1.03 | 1.06 |\n| Ocean | 1.00 | 1.01 | 1.03 |\n| Passaic | 1.00 | 1.02 | 1.05 |\n| Salem | 1.02 | 1.03 | 1.03 |\n| Somerset | 1.00 | 1.03 | 1.09 |\n| Sussex | 1.03 | 1.04 | 1.07 |\n| Union | 1.01 | 1.03 | 1.06 |\n| Warren | 1.02 | 1.07 | 1.15 |\n\n\n\n[Source PDF](SOURCE.pdf#page=42)"}
{"metadata": {"source_document": "NJAC 7.8", "version_year": "2026", "chapter_subchapter": "Front matter", "citation": "NJAC 7.8-5.7(d)", "topic": "Table 5-6: Future Precipitation Change Factors"}, "programmatic_checks": {}, "content_markdown": "# Stormwater Management Rules\n\n## Table 5-6: Future Precipitation Change Factors\n\n| County | Future Precipitation Change Factors | | |\n| --- | --- | --- | --- |\n| | 2-year
Design Storm | 10-year
Design Storm | 100-year
Design Storm |\n| Atlantic | 1.22 | 1.24 | 1.39 |\n| Bergen | 1.20 | 1.23 | 1.37 |\n| Burlington | 1.17 | 1.18 | 1.32 |\n| Camden | 1.18 | 1.22 | 1.39 |\n| Cape May | 1.21 | 1.24 | 1.32 |\n| Cumberland | 1.20 | 1.21 | 1.39 |\n| Essex | 1.19 | 1.22 | 1.33 |\n| Gloucester | 1.19 | 1.23 | 1.41 |\n| Hudson | 1.19 | 1.19 | 1.23 |\n| Hunterdon | 1.19 | 1.23 | 1.42 |\n| Mercer | 1.16 | 1.17 | 1.36 |\n| Middlesex | 1.19 | 1.21 | 1.33 |\n| Monmouth | 1.19 | 1.19 | 1.26 |\n| Morris | 1.23 | 1.28 | 1.46 |\n| Ocean | 1.18 | 1.19 | 1.24 |\n| Passaic | 1.21 | 1.27 | 1.50 |\n| Salem | 1.20 | 1.23 | 1.32 |\n| Somerset | 1.19 | 1.24 | 1.48 |\n| Sussex | 1.24 | 1.29 | 1.50 |\n| Union | 1.20 | 1.23 | 1.35 |\n| Warren | 1.20 | 1.25 | 1.37 |\n\nSource context and notes:\n\n\n(d) Table 5-6 below sets forth the change factors to be used in determining the projected two-, 10-,\n\nand 100-year storm events for use in this chapter, which are organized alphabetically by county. The precipitation depth of the projected two-, 10-, and 100-year storm events of a site shall be determined by multiplying the precipitation depth of the two-, 10-, and 100-year storm events determined from the National Weather Service’s Atlas 14 Point Precipitation Frequency Estimates pursuant to (c)1 above, by the change factor in Table 5-6 below, in accordance with the county or counties where the drainage area(s) of the site is located. Where the major development and/or its drainage area lies in more than one county, the precipitation values shall be adjusted according to the percentage of the drainage area in each county. Alternately, separate rainfall totals can be\ndeveloped for each county using the values in the table below.\n\nTable 5-6: Future Precipitation Change Factors\n\n\n| County | Future Precipitation Change Factors | | |\n| --- | --- | --- | --- |\n| | 2-year
Design Storm | 10-year
Design Storm | 100-year
Design Storm |\n| Atlantic | 1.22 | 1.24 | 1.39 |\n| Bergen | 1.20 | 1.23 | 1.37 |\n| Burlington | 1.17 | 1.18 | 1.32 |\n| Camden | 1.18 | 1.22 | 1.39 |\n| Cape May | 1.21 | 1.24 | 1.32 |\n| Cumberland | 1.20 | 1.21 | 1.39 |\n| Essex | 1.19 | 1.22 | 1.33 |\n| Gloucester | 1.19 | 1.23 | 1.41 |\n| Hudson | 1.19 | 1.19 | 1.23 |\n| Hunterdon | 1.19 | 1.23 | 1.42 |\n| Mercer | 1.16 | 1.17 | 1.36 |\n| Middlesex | 1.19 | 1.21 | 1.33 |\n| Monmouth | 1.19 | 1.19 | 1.26 |\n| Morris | 1.23 | 1.28 | 1.46 |\n| Ocean | 1.18 | 1.19 | 1.24 |\n| Passaic | 1.21 | 1.27 | 1.50 |\n| Salem | 1.20 | 1.23 | 1.32 |\n| Somerset | 1.19 | 1.24 | 1.48 |\n| Sussex | 1.24 | 1.29 | 1.50 |\n| Union | 1.20 | 1.23 | 1.35 |\n| Warren | 1.20 | 1.25 | 1.37 |\n\n\n\n[Source PDF](SOURCE.pdf#page=43)"}