Water Quality Monitoring Data

Crew member looking at water quality data

Water quality within the Priest Rapids Project area supports domestic, industrial and agricultural water supply, stock watering, wildlife habitat, fish spawning, migration and rearing. We currently operate and maintain four, fixed-site water quality stations within the Priest Rapids Project Area. These sites are located in the forebays and tailraces of Wanapum and Priest Rapids dams. A multi-probe water quality measuring device located at each station collects water temperature (Temp - Celsius - ° C), barometric pressure (mm/hg) and total dissolved gas (TDG - percent saturation) data on an hourly basis. Bi-weekly grab samples of turbidity, dissolved oxygen and pH are also collected from these sites. The data collected is used to document the status of key water quality variables within the Priest Rapids Project area and to comply with our 401 water quality certification.

Water Quality Data

Dissolved Gas Supersaturation Measurements

Dissolved Gas Biological Smolt Monitoring

  • Priest Rapids Monitoring Site Data (xls):  2017  |  2016  |  2015  |  2014 

Fish Spill Season Total Dissolved Gas Summary Reports


WARNING-PROVISIONAL DATA, SUBJECT TO REVISION: Real-time data presented by Grant County Public Utility District No. 2 (Grant PUD) on this website - including discharge (Kcfs), spill (Kcfs), percent spill (spill %), temperature (temp - Celsius), total dissolved gas (TDG saturation %), total dissolved pressure (mm/hg), and barometric pressure (mm Hg) are preliminary and have not received final quality assurance/quality control (QA/QC) review and verification. Inaccuracies in the data may be present, and can be the result of instrument malfunctions, instrument failure, or physical changes at Fixed Monitoring Stations. Subsequent review may result in significant revisions to this data.

THIS DATA SHOULD NOT BE USED AS THE BASIS FOR MAKING BUSINESS, PERSONAL, OR OTHER DECISIONS AND GRANT PUD DOES NOT WARRANT ITS FITNESS FOR ANY USE OR PURPOSE. Data that has received QA/QC review and verification is posted daily, for the preceding day Monday through Thursday, and on Monday for the preceding Friday, Saturday, and Sunday at our Water Quality Monitoring page.