USGS - science for a changing world

 The Branch of Quality Systems (BQS)

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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.

Loch Vale Sampling Site, Colorado


May 29, 2015
[SLQA]  Data entry deadline for the Spring 2015 study.
<SLQA Home Page>

March 27, 2015
[SRS]   Data entry deadline for the Spring 2015 study.
<SRS Home Page>

March 16, 2015
[SLQA]   Samples mailed out to labs for Spring study.
<SLQA Home Page>

March 2015
[NFQA]   NFQA samples mailed out to field offices.

February 2015
[IBSP and OBSP]   New data-quality assessment summaries for NWQL performance on Inorganic and Organic blind samples are now available!

October 2014
[IBSP]   New website launched!    Up to seven different charts available for viewing the results from inorganic blind-samples submitted to the NWQL.         Check it out! <IBSP Charts>

BQS News

OTHER LINKS        BQS Contacts Publications NADP NWQL OWQ

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Page Last Modified: March 26, 2015 10:10 AM