The US Geological Survey's Branch of Quality Systems (BQS) operates seven blind sample quality assurance projects or programs to benefit the Water Science Centers,
the laboratories used by USGS, and to assure USGS analytical data quality.
USGS data users will find helpful charts and tables summarizing laboratory performance over time for different laboratory types and for USGS field technicians and volunteers collecting water samples.
[NFQA] NFQA to send out samples to the field offices in March 2015
[IBSP and OBSP] New data-quality assessment summaries for NWQL performance on Inorganic and Organic blind samples are now available!
[SRS] Invitation to participate in the Spring 2015 study sent out. <SRS Home Page>