Measure GL-15 Metadata


Most Recent Measure Description:
ACS Code:GL-15
PERS Code:630
Measure Key Words:Phosphorus loadings from tributaries
Measure Language:Five-year average annual loadings of soluble reactive phosphorus (metric tons per year) from tributaries draining targeted watersheds.
Goal, Objective and Subobjective:2.2.4: Improve the Health of the Great Lakes
Measure Type:Target
ACS Shareholder: 
Comments:New measure starting in FY11. 2003-07 baseline (metric ton/year) is the following: Fox River is 212, Saginaw River is 133, Maumee River is 623, St. Louis River is TBD, and Genesee River is 85. The commitments measure percent reduction in five-year average annual loadings.


Type of Measure *Yes/NoFY09FY10FY11FY12
NPGYes  0.5%0.5%
Budget (target)Yes  0.5%0.5%
Strategic PlanNo   n/a
KPINo   n/a
ARRANo   n/a
StateGrantNo  n/an/a
* Note: The figures for all budget measures are targets. The figures for all the other types of measures are commitments established during the development of the National Water Program Guidance.


Office Information:
Office Lead:GLNPO
Contact:Michael Russ, EPA Great Lakes National Program Office: russ.michael@epa.gov | (312) 886-4013


Most Recent Measure Definition (From FY2010 or FY2010, if available):
Terms and Phrases:o Soluble reactive phosphorus includes the dissolved forms of phosphorus compounds that are readily absorbed and used by algae and other aquatic plants. Total phosphorus also includes forms of phosphorus that are attached to particles such as clay. o Targeted watersheds are those that contribute large quantities of phosphorus to the waters of the Great Lakes, thereby contributing to the nuisance growth of algae or other degraded conditions. The Great Lakes Restoration Initiative Action Plan specifically references the watersheds for the following rivers: St. Louis River (Lake Superior), Saginaw River (Lake Huron), Fox River (Lake Michigan), Maumee River (Lake Erie), and Genesee River (Lake Ontario). o Metric tonne: 1000 kg; 2,200 lbs
Methodology for Computation of Results:The U.S. Geological Survey collects real-time, near-real-time, and synoptic flow and water-quality data from tributaries to the Great Lakes. Surface water-quality data are entered into the National Water Information System. Data are available from the web portal at http://waterdata.usgs.gov/nwis Exit EPA Disclaimer Near-real-time concentrations and loads will be modeled using watershed models coupled with real-time flow and water-quality data. The resulting capability will provide recent and real-time data to estimate current nutrient loadings and to forecast loadings from the targeted watersheds to the Great Lakes.
Units:Metric tons per year of soluble reactive phosphorus
Universe:n/a
Baseline: 5-year flow-weighted average 2003-2007, metric tonnes/yr: Fox River: 212 Saginaw River: 133 Maumee River: 623 Genesee River: 85 (2006-2007) St. Louis River: TBD


Most Recent Regional Measure Results Trend Data (From FY2010 End of Year Report, if available):
Measure Results Trend Data 


Most Recent National Results Trend Data Chart (From FY2010 End of Year Report, if available):
Measure Results Trend Data Chart 


ACS Measure History:
Fiscal YearACS CodeMeasure Description
2012GL-15Five-year average annual loadings of soluble reactive phosphorus (metric tons per year) from tributaries draining targeted watersheds.
2011GL-15Five-year average annual loadings of soluble reactive phosphorus (metric tons per year) from tributaries draining targeted watersheds.


Decision History: Click for measure decision details


Most Recent Data Sources and Data Quality and Limitations (From FY2011 or FY2010 V & V, if available):GL-15.docx




External Links:
Congressional Justification
2010 EOY Report


Return to Measure Index

Go to EPA Homepage