River & stream data quality assurance

We follow strict protocols to ensure our freshwater quality data are credible and defensible. We calibrate equipment frequently and test duplicate samples to eliminate errors.

The cover of the quality assurance monitoring plan

Monitoring plan updated for 2023

Our 2023 quality-assurance monitoring plan describes our most up-to-date study methods, including data-quality objectives, quality-control systems, field and laboratory methods, and data-management procedures.

We follow strict data-gathering protocols

Scientist works with bottles and pump in a laboratory set up inside a sampling van. There is an iron grate in the foreground. — Field laboratory

River and stream – monitoring plans lists all Quality Assurance Monitoring Plans (QAMPs) and addenda we have published since 2009. These plans define our long-term ambient monitoring program.
Ambient freshwater biological and water quality monitoring standard operating procedures lists all of our published SOPs for this long-term program. These describe our basic processes for collecting and analyzing water samples and data.

Quality is assured by duplicate samples

Scientist tosses a group of sample bottles on a rope into a wide river from an Eastern Washington river bank. — Collecting samples from a river bank.

Contact information

Markus Von Prause
Ambient Water Quality Monitoring Lead
mark.vonprause@ecy.wa.gov
206-305-8179

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River & stream data quality assurance

Monitoring plan updated for 2023

We follow strict data-gathering protocols

Quality is assured by duplicate samples

Related links

Contact information