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.

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

Field laboratory

Quality is assured by duplicate samples

Collecting samples from a river bank.