Jackson Bottom Wetlands Preserve

Providing interpretive education on wetlands and wildlife, panoramic views, water quality, weather, natural resource management, trails, bird watching, recreation, exhibits, displays and an eagles nest, Jackson Bottom Wetlands Preserve is a treasure of the Hillsboro community.

Water Quality - Tualatin River

Tualatin River Water Quality Data

The Tualatin River drains an area of 712 square miles. The river generally flows in easterly direction from its headwaters in the Coast Range to its confluence with the Willamette River. The river is approximately 83 miles long, with several tributaries, including Scoggins, Gales, Dairy, Rock and Fanno Creeks.

Jackson Bottom Wetlands Preserve is located in the 3000-acre Jackson Bottom floodplain of the Tualatin River. Jackson Bottom is located just downriver of the Dairy Creek confluence with the Tualatin. In winter and spring, as a result of significant precipitation events, the Tualatin River overflows onto large areas of the Preserve. Most of the Preserve is at 128-130 feet MSL (above Mean Sea Level). The Tualatin River water quality monitoring site at the Preserve is at River Mile (RM) 44.4. (RM 0 is at the confluence with the Willamette River.)

The following parameters are measured at this site:

  • Temperature
  • pH
  • Dissolved oxygen
  • Conductivity
  • Turbidity
  • River stage


Tualatin River Graphs for Last 14 Days

Preliminary Real-Time Data

Note that the data shown here are preliminary. They are based on raw data measurements with little or no review to ensure the quality of the data. If the data are used for any purpose, a disclaimer should be included that denotes the provisional status of the data and the possibility of errors.

Graph of Temperature
Graph of DO
Graph of pH
Graph of Specific Conductance
Graph of Turbidity
Graph of Stage
Graph of Flow
Graph of Level above MSL