Chesapeake Bay Watershed Boundary (1)
State Boundaries (2)
Chesapeake Bay Shoreline (3)
All Catchment Boundaries (4)
Healthy Watershed Boundaries (5)
Health Index Overall Score (7)
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Landscape Condition (9)
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Hydrology (10)
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Geomorphology (11)
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Habitat (12)
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Biological Condition (13)
|
| Low |
| Medium-Low |
| Medium |
| Medium-High |
| High |
Water Quality (14)
| Low |
|
| Medium-Low |
| Medium |
| Medium-Low |
| High |
% Forest Cover in Riparian Zone (17)
| Low (0-35%) |
| Medium-Low (35-70%) |
| Medium (70-80%) |
| Medium-High (80-90%) |
| High (90-100%) |
Housing Unit Density (housing units/sq. km) (18)
| Low (0-10) |
| Medium-Low (10-100) |
| Medium (100-200) |
| Medium-High (200-500) |
| High (500-2500) |
Population Density (persons/sq. km) (19)
|
| Low (≤1) |
|
| Medium-Low (1-10) |
|
| Medium (10-100) |
|
| Medium-High (100-500) |
|
| High (500-4540) |
Mine Density (mines/sq. km) (20)
| None |
| Less than or = 1 |
| High (≤1.28) |
% Managed Turf Grass (21)
| Low (0-1%) |
| Medium-Low (1-25%) |
| Medium (25-50%) |
| Medium-High (50-75%) |
| High (75-100%) |
% Historic Forest Loss (22)
| Low (0-20%) |
| Medium-Low (20-40%) |
| Medium (40-60%) |
| Medium-High (60-80%) |
| High (80-100%) |
% Natural Land Cover (23)
| Low (0-20%) |
| Medium-Low (20-40%) |
| Medium (40-60%) |
| Medium-High (60-80%) |
| High (80-100%) |
% Forest in Watershed (25)
| Low (0-25%) |
| Medium-Low (25-45%) |
| Medium (45-55%) |
| Medium-High (55-75%) |
| High (100.0%) |
% Impervious (26)
| Low (0-2%) |
| Medium-Low (2-5%) |
| Medium (5-10%) |
| Medium-High (10-15%) |
| High (15-100%) |
% Wetlands (27)
| Low (0-5%) |
| Medium-Low (5-10%) |
| Medium (10-30%) |
| Medium-High (30-60%) |
| High (60-100%) |
% Agriculture On Hydric Soil (28)
| Low (0-1%) |
| Medium-Low (1-10%) |
| Medium (10-20%) |
| Medium-High (20-30%) |
| High (30-100%) |
% Forest Remaining (29)
| Low (0-20%) |
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
| Medium-High (60-80%) |
| High (80-100%) |
% Wetlands Remaining (30)
|
| Low (≤2.5%) |
|
| Medium-Low (≤10%) |
|
| Medium (≤30%) |
|
| Medium-High (≤60%) |
|
| High (≤100%) |
Road Stream Crossings Density (crossings/sq. km) (31)
| Low (0-.5) |
| Medium-Low (.5-.75) |
| Medium (.75-1.5) |
| Medium-High (1.5-2) |
| High (2-9.74) |
% Impervious in Riparian Zone (33)
|
| Low (0-2%) |
|
| Medium-Low (2-5%) |
|
| Medium (5-10%) |
|
| Medium-High (10-15%) |
|
| High (15-100%) |
Dam Density (dams/sq. km) (34)
|
| Low (0-.05) |
|
| Medium-Low(.05-.25) |
|
| Medium (.25-1) |
|
| Medium High (1-1.5) |
|
| High (1.5-3.77) |
% Vulnerable Geology (35)
| Low (0-10%) |
| Medium-Low (10-25%) |
|
| Medium (25-50%) |
| Medium-High (50-75%) |
| High (75-100%) |
% Natural Connectivity (Nature's Network Conservation Habitats) (37)
| Low (0-1%) |
|
| Medium-Low (1-10%) |
| Medium (10-50%) |
| Medium High (50-75%) |
| High (75-100%) |
Fish Habitat Condition Index: Local Catchment (38)
| Low (0-1) |
| Medium-Low (1-2) |
|
| Medium (2-3) |
|
| Medium-High (3-4) |
| High (4-5) |
Outlet Aquatic Condition Index (40)
|
| Low (0-.5) |
|
| Medium-Low (.5-.65) |
|
| Medium (.65-.75) |
|
| Medium-High (.75-.85) |
|
| High (.85-1) |
% Impaired Streams (42)
| Low (0-15%) |
| Medium-Low (15-45%) |
| Medium (45-70%) |
| Medium-High (70-90%) |
| High (90-100%) |
SPARROW - Total Nitrogen (lbs/ac/yr) (43)
| Low (0-0.007) |
| Medium-Low (0.007-0.030) |
| Medium (0.030-0.071) |
| Medium-High (0.071-0.141) |
| High (0.141-0.582) |
Nitrogen Load Agricultural Sources (lbs/ac) (44)
|
| Low (0-0.002) |
|
| Medium-Low (0.002-0.008) |
|
| Medium (0.008-0.021) |
|
| Medium-High (0.021-0.044) |
|
| High (0.044-0.080) |
Phosphorus Load Agricultural Sources (lbs/ac) (45)
| Low (0-0.012) |
| Medium-Low (0.012-0.053) |
| Medium (0.053-0.138) |
| Medium-High (0.138-0.275) |
| High (0.275-0.489) |
Sediment Load Agricultural Sources (lbs/ac) (46)
| Low (0-0.008) |
| Medium-Low (0.008-0.032) |
| Medium (0.032-0.082) |
| Medium-High (0.082-0.152) |
| High (0.152-0.565) |
Nitrogen Load CSO Sources (lbs/ac) (47)
|
| Low (0-0.004) |
|
| Medium-Low (0.004-0.015) |
|
| Medium (0.015-0.052) |
|
| Medium-High (0.052-0.149) |
|
| High (0.149-0.252) |
Phosphorus Load CSO Sources (lbs/ac) (48)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.032) |
|
| Medium (0.032-0.069) |
|
| Medium-High (0.069-0.142) |
|
| High (0.142-0.930) |
Sediment Load CSO Sources (lbs/ac) (49)
|
| Low (0-0.010) |
|
| Medium-Low (0.010-0.054) |
|
| Medium (0.054-0.116) |
|
| Medium-High (0.116-0.241) |
|
| High (0.241-0.88) |
Nitrogen Load Development Sources (lbs/ac) (50)
|
| Low (0-0.007) |
|
| Medium-Low (0.007-0.030) |
|
| Medium (0.030-0.074) |
|
| Medium-High (0.074-0.131) |
|
| High (0.131-0.569) |
Phosphorus Load Development Sources (lbs/ac) (51)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.023) |
|
| Medium (0.023-0.068) |
|
| Medium-High (0.068-0.222) |
|
| High (0.222-0.545) |
Sediment Load Development Sources (lbs/ac) (52)
|
| Low (0-0.010) |
|
| Medium-Low (0.010-0.035) |
|
| Medium (0.035-0.080) |
|
| Medium-High (0.080-0.155) |
|
| High (0.155-0.590) |
Nitrogen Load Septic Sources (lbs/ac) (53)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-≤0.019) |
|
| Medium (0.019-0.047) |
|
| Medium-High (0.047-0.084) |
|
| High (0.084-0.386) |
Nitrogen Load Wastewater Sources (lbs/ac) (54)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
Phosphorus Load Wastewater Sources (lbs/ac) (55)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
Sediment Load Wastewater Sources (lbs/ac) (56)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
% Average Forest Loss (59)
| Low (0-1%) |
| Medium-Low (1-5%) |
| Medium (5-15%) |
| Medium-High (15-30%) |
| High (30-100%) |
% Protected Lands (60)
| Low (0-20%) |
| Medium-Low (20-40%) |
| Medium (40-60%) |
| Medium-High (60-80%) |
| High (80-100%) |
% Increase in Development (61)
|
| Low (0-5%) |
|
| Medium Low (5-10%) |
|
| Medium (10-40%) |
|
| Medium - High (40-80%) |
|
| High (80-100%) |
Domestic Water Use (mil gal/day) (63)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-110) |
Industrial Water Use (mil gal/day) (64)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5mil) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-290) |
Agricultural Water Use (mil gal/day) (65)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-81) |
% Wildfire Risk (67)
| Low (=0.00) |
| Medium-Low (0-15%) |
| Medium (15%-30%) |
| Medium-High (30-60%) |
| High (60-100%) |
Brook Trout Occurrence (Current) (69)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
Brook Trout Occurrence (Future) with 6 deg. C increase (70)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
Climate Stress (Habitat) (71)
| Low (0-.2) |
| Medium-Low (.2-.4) |
| Medium (.4-.6) |
| Medium-High (.6-.8) |
| High (.8-1) |
Health Index Overall Score (73)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Landscape Condition (75)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Hydrology (76)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Geomorphology (77)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Habitat (78)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Biological Condition (79)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-High |
|
| High |
Water Quality (80)
|
| Low |
|
| Medium-Low |
|
| Medium |
|
| Medium-Low |
|
| High |
% Forest Cover in Riparian Zone (83)
|
| Low (0-35%) |
|
| Medium-Low (35-70%) |
|
| Medium (70-80%) |
|
| Medium-High (80-90%) |
|
| High (90-100%) |
Housing Unit Density (housing units/sq. km) (84)
|
| Low (0-10) |
|
| Medium-Low (10-100) |
|
| Medium (100-200) |
|
| Medium-High (200-500) |
|
| High (500-2500) |
Population Density (persons/sq. km) (85)
|
| Low (≤1) |
|
| Medium-Low (1-10) |
|
| Medium (10-100) |
|
| Medium-High (100-500) |
|
| High (500-4540) |
Mine Density (mines/sq. km) (86)
|
| None |
|
| Less than or = 1 |
|
| High (≤1.28) |
% Managed Turf Grass (87)
|
| Low (0-1%) |
|
| Medium-Low (1-25%) |
|
| Medium (25-50%) |
|
| Medium-High (50-75%) |
|
| High (75-100%) |
% Historic Forest Loss (88)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
% Natural Land Cover (89)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
% Forest in Watershed (91)
|
| Low (0-25%) |
|
| Medium-Low (25-45%) |
|
| Medium (45-55%) |
|
| Medium-High (55-75%) |
|
| High (100.0%) |
% Impervious (92)
|
| Low (0-2%) |
|
| Medium-Low (2-5%) |
|
| Medium (5-10%) |
|
| Medium-High (10-15%) |
|
| High (15-100%) |
% Wetlands (93)
|
| Low (0-5%) |
|
| Medium-Low (5-10%) |
|
| Medium (10-30%) |
|
| Medium-High (30-60%) |
|
| High (60-100%) |
% Agriculture On Hydric Soil (94)
|
| Low (0-1%) |
|
| Medium-Low (1-10%) |
|
| Medium (10-20%) |
|
| Medium-High (20-30%) |
|
| High (30-100%) |
% Forest Remaining (95)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
% Wetlands Remaining (96)
|
| Low (≤2.5%) |
|
| Medium-Low (≤10%) |
|
| Medium (≤30%) |
|
| Medium-High (≤60%) |
|
| High (≤100%) |
Road Stream Crossings Density (crossings/sq. km) (97)
|
| Low (0-.5) |
|
| Medium-Low (.5-.75) |
|
| Medium (.75-1.5) |
|
| Medium-High (1.5-2) |
|
| High (2-9.74) |
% Impervious in Riparian Zone (99)
|
| Low (0-2%) |
|
| Medium-Low (2-5%) |
|
| Medium (5-10%) |
|
| Medium-High (10-15%) |
|
| High (15-100%) |
Dam Density (dams/sq. km) (100)
|
| Low (0-.05) |
|
| Medium-Low(.05-.25) |
|
| Medium (.25-1) |
|
| Medium High (1-1.5) |
|
| High (1.5-3.77) |
% Vulnerable Geology (101)
|
| Low (0-10%) |
|
| Medium-Low (10-25%) |
|
| Medium (25-50%) |
|
| Medium-High (50-75%) |
|
| High (75-100%) |
% Natural Connectivity (Nature's Network Conservation Habitats) (103)
|
| Low (0-1%) |
|
| Medium-Low (1-10%) |
|
| Medium (10-50%) |
|
| Medium High (50-75%) |
|
| High (75-100%) |
Fish Habitat Condition Index: Local Catchment (104)
|
| Low (0-1) |
|
| Medium-Low (1-2) |
|
| Medium (2-3) |
|
| Medium-High (3-4) |
|
| High (4-5) |
Outlet Aquatic Condition Index (106)
|
| Low (0-.5) |
|
| Medium-Low (.5-.65) |
|
| Medium (.65-.75) |
|
| Medium-High (.75-.85) |
|
| High (.85-1) |
% Impaired Streams (108)
|
| Low (0-15%) |
|
| Medium-Low (15-45%) |
|
| Medium (45-70%) |
|
| Medium-High (70-90%) |
|
| High (90-100%) |
SPARROW - Total Nitrogen (lbs/ac/yr) (109)
|
| Low (0-0.007) |
|
| Medium-Low (0.007-0.030) |
|
| Medium (0.030-0.071) |
|
| Medium-High (0.071-0.141) |
|
| High (0.141-0.582) |
Nitrogen Load Agricultural Sources (lbs/ac) (110)
|
| Low (0-0.002) |
|
| Medium-Low (0.002-0.008) |
|
| Medium (0.008-0.021) |
|
| Medium-High (0.021-0.044) |
|
| High (0.044-0.080) |
Phosphorus Load Agricultural Sources (lbs/ac) (111)
|
| Low (0-0.012) |
|
| Medium-Low (0.012-0.053) |
|
| Medium (0.053-0.138) |
|
| Medium-High (0.138-0.275) |
|
| High (0.275-0.489) |
Sediment Load Agricultural Sources (lbs/ac) (112)
|
| Low (0-0.008) |
|
| Medium-Low (0.008-0.032) |
|
| Medium (0.032-0.082) |
|
| Medium-High (0.082-0.152) |
|
| High (0.152-0.565) |
Nitrogen Load CSO Sources (lbs/ac) (113)
|
| Low (0-0.004) |
|
| Medium-Low (0.004-0.015) |
|
| Medium (0.015-0.052) |
|
| Medium-High (0.052-0.149) |
|
| High (0.149-0.252) |
Phosphorus Load CSO Sources (lbs/ac) (114)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.032) |
|
| Medium (0.032-0.069) |
|
| Medium-High (0.069-0.142) |
|
| High (0.142-0.930) |
Sediment Load CSO Sources (lbs/ac) (115)
|
| Low (0-0.010) |
|
| Medium-Low (0.010-0.054) |
|
| Medium (0.054-0.116) |
|
| Medium-High (0.116-0.241) |
|
| High (0.241-0.88) |
Nitrogen Load Development Sources (lbs/ac) (116)
|
| Low (0-0.007) |
|
| Medium-Low (0.007-0.030) |
|
| Medium (0.030-0.074) |
|
| Medium-High (0.074-0.131) |
|
| High (0.131-0.569) |
Phosphorus Load Development Sources (lbs/ac) (117)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.023) |
|
| Medium (0.023-0.068) |
|
| Medium-High (0.068-0.222) |
|
| High (0.222-0.545) |
Sediment Load Development Sources (lbs/ac) (118)
|
| Low (0-0.010) |
|
| Medium-Low (0.010-0.035) |
|
| Medium (0.035-0.080) |
|
| Medium-High (0.080-0.155) |
|
| High (0.155-0.590) |
Nitrogen Load Septic Sources (lbs/ac) (119)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-≤0.019) |
|
| Medium (0.019-0.047) |
|
| Medium-High (0.047-0.084) |
|
| High (0.084-0.386) |
Nitrogen Load Wastewater Sources (lbs/ac) (120)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
Phosphorus Load Wastewater Sources (lbs/ac) (121)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
Sediment Load Wastewater Sources (lbs/ac) (122)
|
| Low (0-0.006) |
|
| Medium-Low (0.006-0.026) |
|
| Medium (0.026-0.077) |
|
| Medium-High (0.077-0.207) |
|
| High (0.207-0.489) |
% Average Forest Loss (125)
|
| Low (0-1%) |
|
| Medium-Low (1-5%) |
|
| Medium (5-15%) |
|
| Medium-High (15-30%) |
|
| High (30-100%) |
% Protected Lands (126)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
% Increase in Development (127)
|
| Low (0-5%) |
|
| Medium Low (5-10%) |
|
| Medium (10-40%) |
|
| Medium - High (40-80%) |
|
| High (80-100%) |
Domestic Water Use (mil gal/day) (129)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-110) |
Industrial Water Use (mil gal/day) (130)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5mil) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-290) |
Agricultural Water Use (mil gal/day) (131)
|
| Low (0-0.2) |
|
| Medium-Low (0.2-5) |
|
| Medium (5-25) |
|
| Medium-High (25-50) |
|
| High (50-81) |
% Wildfire Risk (133)
|
| Low (=0.00) |
|
| Medium-Low (0-15%) |
|
| Medium (15%-30%) |
|
| Medium-High (30-60%) |
|
| High (60-100%) |
Brook Trout Occurrence (Current) (135)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
Brook Trout Occurrence (Future) with 6 deg. C increase (136)
|
| Low (0-20%) |
|
| Medium-Low (20-40%) |
|
| Medium (40-60%) |
|
| Medium-High (60-80%) |
|
| High (80-100%) |
Climate Stress (Habitat) (137)
|
| Low (0-.2) |
|
| Medium-Low (.2-.4) |
|
| Medium (.4-.6) |
|
| Medium-High (.6-.8) |
|
| High (.8-1) |
|
