U.S. Geological Survey
Water-Resources Investigations Report 02-4228
Prepared as part of the
NATIONAL WATER-QUALITY ASSESSMENT PROGRAM

Quality of Shallow Ground Water in Areas of Recent Residential and Commercial Development, Wichita, Kansas, 2000

Table 7. Statistical summary and U.S. Environmental Protection Agency (2000a) drinking-water standards for
selected nutrients in water from 30 monitoring wells in areas of recent residential and commercial
development, Wichita, Kansas, 2000

[<, less than; --, not applicable; MCL, Maximum Contaminant Level]

Nutrient Number of
samples 		Concentration
(milligrams per liter)
 Minimum  Median  Maximum		 Drinking-water
standard
(milligrams per
liter)
Ammonia, as nitrogen 30 <0.02 <0.02 0.18 --
Ammonia plus organic nitrogen, as nitrogen 30   <.10   <.10    .41 --
Nitrate, as nitrogen 30   <.05 2.2 10      10 (MCL)
Phosphate, ortho, as phosphorus 30   <.01     .06     .32 --
Phosphorus 30    <.006      .06     .30 --
Organic carbon, dissolved 30   .7   3.0 100        --

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