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OBSP Data Quality Assessment Summaries are now on the internal page

The Branch of Quality Systems (BQS) operates an Organic Blind Sample Project (OBSP). One of the goals of the project is to document bias and variability for the National Water Quality Laboratory (NWQL) through the use of blind quality assurance (QA) samples. From these summaries, districts can be informed of the NWQL's performance on QA samples that parallel their own environmental samples.

The OBSP has created several different summaries over the years. Currently the OBSP is publishing periodic data quality assessment summaries. The former summaries were called Quarterly summaries, Cumulative Summaries and Corrective Action reports and all can be found at the OBSP archived summaries link below.

The charts and data that you might secure from this U.S. Geological Survey (USGS) web page (identified as "OBSP") have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Internal Data Assessment Summaries

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Page Last Modified: June 22, 2016