National Water-Quality Assessment (NAWQA) Project

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Tracking the Source and Quantity of Nutrients to the Nation's Estuaries

California Coast > Back to Estuary Selection Page

Click on a watershed to access maps of nutrient contributions to an estuary.


Online Decision Support Tool:
Access national and regional SPARROW models to:

  • Map predictions of nutrient sources;
  • Track the sources and quantities of nutrients to downstream waters
  • Develop science-based estimates of how changes in nutrient sources affect the transport of nutrients to downstream waters.

SPARROW model Fact Sheet

SPARROW model Applications


National Nutrient Assessments



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Page Last Modified: Tuesday, 02-Aug-2016 08:06:35 EDT