The Heinz Center's State of the Nation's Ecosystems
ecosystem: Urban and Suburban Areas
indicator Name: Phosphorus in Urban and Suburban Streams: Ecosystem Comparison: Phosphorus in Streams, 1992-1998
page # in printed report: 187
location on page: lower
data source: USGS National Water Quality Assessment. Coverage: lower 48 states. Each sampling area was sampled intensively for approximately 2 years during 1992-1998.
notes: please see technical notes for further details on accessing these data from their original source this data table comes from a specific graphic in The State of the Nation's Ecosystems report (www.heinzctr.org/ecosystems)

units: % of all stream sites tested
  Farmlands Forests Urban
less than 0.1 ppm 27.1 89.7 31.6
0.1 to less than 0.3 ppm 41.1 7.7 36.9
0.3 to less than 0.5 ppm 16.8 0 21
at least 0.5 ppm 15 2.6 10.5