 |
USGS Home Contact USGS Search USGS |
|
 |
|
|
|
SLQA Project began displaying study results in a new format starting with Study-2, 2008.
All participating laboratory results are displayed using the Lab ID number assigned.
Data tables and control charts are accessible by selecting the colored tabs at the bottom of each page.
* To display all functionalities within the spreadsheet you must download the study file (linked below).
For example: Notes associated with the charts are only visible after downloading the spreadsheet. *
Click here for dynamic viewing via Tableau (added June 2022).
| Study-2, 2023 (Oct/Nov, 2023)
Study-1, 2023 (Apr/May, 2023) Study-2, 2022 (Oct/Nov, 2022) Study-1, 2022 (Apr/May, 2022) Study-2, 2021 (Oct/Nov, 2021) Study-1, 2021 (Apr/May, 2021) Study-2, 2020 (Oct/Nov, 2020) Study-1, 2020 (Apr/May, 2020) Study-2, 2019 (Oct/Nov, 2019) Study-1, 2019 (Apr/May, 2019) Study-2, 2018 (Oct/Nov, 2018) Study-1, 2018 (Apr/May, 2018) Study-2, 2017 (Oct/Nov, 2017) Study-1, 2017 (Apr/May, 2017) Study-2, 2016 (Oct/Nov, 2016) Study-1, 2016 (Apr/May, 2016) Study-2, 2015 (Oct/Nov, 2015) Study-1, 2015 (Apr/May, 2015) Study-2, 2014 (Oct/Nov, 2014) Study-1, 2014 (Apr/May, 2014) Study-2, 2013 (Oct/Nov, 2013) Study-1, 2013 (Apr/May, 2013) Study-2, 2012 (Oct/Nov, 2012) Study-1, 2012 (Apr/May, 2012) Study-2, 2011 (Oct/Nov, 2011) Study-1, 2011 (Apr/May, 2011) Study-2, 2010 (Oct/Nov, 2010) Study-1, 2010 (Apr/May, 2010) Study-2, 2009 (Oct/Nov, 2009) Study-1, 2009 (Apr/May, 2009) Study-2, 2008 (Oct/Nov, 2008) |
|
| Old Format | |
| Study-1, 1997 to Study-1, 2008 |
HISTORICAL RESULTS
Here is a look at the historical Median Percent
Differences between the reported and expected results from 1997 to present. Below are individual lab
charts from 2008 to present.