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 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


February 20, 2014 [IBSP and OBSP] New Data-Quality Assessment Summaries for NWQL performance on Inorganic Blind Samples and Organic Blind Samples are now available.

IBSP home page
OBSP home page
late March, 2014 [SLQA] The Sediment Laboratory Quality Assurance sample mailout is in late March
The data entry deadline will be in early June.
Go to SLQA page

March 28, 2014 [SRS] The Standard Reference Samples round robin data entry deadline is March 28, 2014
Go to SRS page

BQS News

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Page Last Modified: December 6, 2013 7:59 AM