Water Quality Trends

Explore short- and long-term trends for those water quality parameters that are most useful in evaluating the extent of nutrient pollution.

Total Nitrogen for the Period of Record

The map below shows the trend being experienced at the long-term monitoring stations spread throughout the CHNEP area.

View Data Source Details

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Note: Trends were prepared on August 20, 2019 using the latest available data. Results presented replace all previous editions.

Map Legend

  • Increasing Trend, Larger Rate Improving
  • Increasing Trend, Smaller Rate Improving
  • No Trend
  • Decreasing Trend, Smaller Rate Declining
  • Decreasing Trend, Larger Rate Declining
  • CHNEP Watershed Boundaries

Map Legend

  • Increasing Trend, Larger Rate Declining
  • Increasing Trend, Smaller Rate Declining
  • No Trend
  • Decreasing Trend, Smaller Rate Improving
  • Decreasing Trend, Larger Rate Improving
  • CHNEP Watershed Boundaries

Map Legend

  • Increasing Trend, Larger Rate
  • Increasing Trend, Smaller Rate
  • No Trend
  • Decreasing Trend, Smaller Rate
  • Decreasing Trend, Larger Rate
  • CHNEP Watershed Boundaries

Download Trend Analysis Output

You can download raw data for your own analysis by clicking on the link below. The data is formatted as a ZIP file containing a Microsoft Access database and multiple PDF maps, and R script.

Download (ZIP, ~ 13MB)

Note: Trends were prepared on August 20, 2019 using the latest available data. Results presented replace all previous editions.

Contacts

For more information, please contact the Coastal & Heartland National Estuary Partnership: