Parameter Notes:

Upstream-to-Downstream Report (Boxplots)

Explore annual statistics for any parameter or year, by basin, with locations ordered upstream-to-downstream and compared to historical conditions. See more details below on how to interpret these graphs.

Expand to view more monitoring location details

Additional Instructions for interpreting the graphs

For each monitoring location there are two boxplots:

  • The darker plot represents the selected year
  • The lighter colored plot represents the selected historical period.
(Review more on how to read a boxplot in the Methods, Analysis and Standards section).

There are three historical comparison period options including:

  • The 5-year period preceding this study year (2018 - 2022)
  • The 10-year period preceding this study year (2013 - 2022)
  • All data available for that location and parameter, excluding 2023

Please note that choosing a different Year does not change the years included in the three comparison period options.