Table 1. Land use and peak chloride concentrations in streams of Baltimore
Population density, people per ha
Maximum CI concentration, mg/liter
Station Land use Drainage area, ha Winter Spring Summer Fall
With roadways
Baisman Run Suburban/forest (≈ 1% impervious surface) 381 1 38-116 19-29 22-37 23-29
Gwynnbrook Suburbanizing 1,066 16 181-1,051 34-57 30-216 24-33
Glyndon Suburban 81 9 229-1,509 79-117 96-469 72-606
Villa Nova Suburban/urban 8,348 12 341-2,458 45-285 38-54 39-55
Dead Run Suburban/urban 1,414 13 1,786-4,629 249-336 176-211 101-391
Carroll Park Urban 16,278 20 960-2,085 63-86 44-86 49-66
Without roadways
Pond Branch Forested 32.3 0 3-6 3-8 3-4 2-3
McDonogh Agriculture 7.8 0 5-8 4-5 4-5 5-7
  • Range in the maximum concentration of chloride from 1998 through 2003 during winter, spring, summer, and fall in the streams of the Baltimore LTER site.