Cumulative Loads (March 1 to

  Total Phosphorus:
  Dissolved Reactive Phosphorus:
  Total Bioavailable Phosphorus:

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The extent and severity of algal blooms in the Western Lake Erie Basin (WLEB) are correlated with the amount of nutrients (nutrient load) entering the WLEB from the Maumee River. Measurements of nutrient concentrations in the Maumee River are collected by Heidelberg University and combined with USGS measurements of Maumee River flow to calculate daily nutrient loads. This tracking tool sums up nutrient loads day-to-day starting March 1st and ending July 31st to show the cumulative nutrient load entering the WLEB through the Maumee River, and charts the cumulative loads in the context of previous (2000-2017) years’ ranges.

Heidelberg University collects water samples on the Maumee River at least daily near Waterville, Ohio and collects three samples a day during storm events. During the critical spring and summer seasons, Heidelberg publishes analytical results and calculated daily loads every week. The intensive schedule, along with development and implementation of this web page in partnership with the Great Lakes Observing System, is supported by the Great Lakes Restoration Initiative and the National Oceanic and Atmospheric Agency’s Great Lakes Environmental Research Laboratory.

More detailed information is available from the following sources: