Data Integrity Workgroup
The Data Integrity Workgroup provides direction and guidance on field and laboratory methods and QA/QC related to the collection, processing and assessment of water quality monitoring data.
Meetings
No upcoming meetings.
CANCELED: Data Integrity Workgroup Quarterly Meeting - October 2025
Data Integrity Workgroup Quarterly Meeting - July 2025
Data Integrity Workgroup Quarterly Meeting - February 2025
About
The Data Integrity Workgroup was formerly known as the Analytical Methods and Quality Assurance Workgroup. Its members are technical advisors to the monitoring and modeling workgroups of the Scientific, Technical Analysis and Reporting Team concerning field and analytical methodology and quality assurance issues related to collection, processing and assessment of water quality data. The workgroup provides a forum for exchange of technical information focused on the standardization of methods/use of comparable methods throughout the Chesapeake Bay Monitoring Program. Members of the workgroup participate in the Coordinated Split Sample, Blind Audit and Reference Sample Programs and use this information to evaluate the quality of the monitoring data and to identify areas that require further study.
Mission Statement
To provide professional direction and guidance on field and laboratory methods and QA/QC, resulting in accurate and comparable Chesapeake Bay and tributary water quality monitoring data.
Objective
- Implement the Coordinated Split Sample program to assess water quality data comparability.
- Participate in blind audit and reference sample programs to demonstrate data accuracy; Investigate potential analytical issues; Determine corrective actions to resolve data discrepancies; Improve efficiency of data collection and reporting procedures; Perform method comparability studies.
- Explore new technologies for water quality analyses; Standardize field and laboratory techniques among agencies; Prepare reports on the quality of nutrient, chlorophyll and sediment data.
- Evaluate the use of non-traditional partner monitoring data, including quality assurance of field and lab methods.
Publications
Methods and Quality Assurance for Chesapeake Bay Water Quality Monitoring Programs
Publication date:This document provides field and laboratory methods and associated quality control requirements for use in Chesapeake Bay water quality monitoring programs.
Data Analysis Issues Tracking System (DAITS)
Publication date: Not listedA central collection point for issues raised by those involved in the management, operation and review of Chesapeake Bay Program monitoring programs.
View document [PDF, 10.8 MB] Data Analysis Issues Tracking System (DAITS)
Split Sample Water Quality Results from Laboratories Participating in the Chesapeake Bay Program: 1985-1989
Publication date:An analysis of data from five split sample programs.
Our Members
- Cindy Johnson (Chair)
Virginia Department of Environmental Quality csjohnson@deq.virginia.gov - Durga Ghosh (Coordinator)
U.S. Geological Survey (USGS) dghosh@chesapeakebay.net - Allison Welch (Staffer)
Chesapeake Research Consortium awelch@chesapeakebay.net - Alexandra Fries
University of Maryland Center for Environmental Science afries@umces.edu - Alice Volpitta
Blue Water Baltimore avolpitta@bluewaterbaltimore.org - Amber DeMarr
University of Maryland Center for Environmental Science ademarr@umces.edu - Barbara Johnson
Blue Water Baltimore bjohnson@bluewaterbaltimore.org - Becky Monahan
Maryland Department of the Environment becky.monahan@maryland.gov - Beth Wasden
bethwasden@nanticokeriver.org - Betty Neikirk
Virginia Institute of Marine Science betty@vims.edu - Breck Sullivan
U.S. Geological Survey (USGS) bsullivan@chesapeakebay.net - Brenda Majedi
U.S. Geological Survey (USGS) blfeit@usgs.gov - Carl Friedrichs
Virginia Institute of Marine Science carl.friedrichs@vims.edu - Carol Pollard
Virginia Institute of Marine Science pollard@vims.edu - Ceana Hoburn
University of Maryland Center for Environmental Science choburn@umces.edu - Chris Mason
U.S. Geological Survey (USGS) camason@usgs.gov - Clinton Leiby
Pennsylvania Department of Environmental Protection clleiby@pa.gov - Cynthia Stevenson
Maryland Department of Health cynthia.stevenson@maryland.gov - Dongmei Alvi
Virginia Tech dongmei@vt.edu - Doug Chambers
U.S. Geological Survey (USGS) dbchambe@usgs.gov - Doug Moyer
U.S. Geological Survey (USGS) dlmoyer@usgs.gov - Elgin Perry
Independent Consultant eperry@chesapeake.net - Emily Young
Interstate Commission on the Potomac River Basin eyoung@chesapeakebay.net - Evelyn Ragsdale
Fairfax County (VA) Evelyn.Ragsdale@fairfaxcounty.gov - Gabriel Duran
Chesapeake Research Consortium gduran@chesapeakebay.net - Heather Wright
Old Dominion University hcrow@odu.edu - Ian McMullen
Delaware Department of Natural Resources and Environmental Control ian.mcmullen@delaware.gov - Jaclyn Mantell
University of Maryland Center for Environmental Science jmantell@umces.edu - Jacob Kilczewski
Maryland Department of Health jacob.kilczewski@maryland.gov - James Colgin
U.S. Geological Survey (USGS) jcolgin@usgs.gov - James Shallenberger
Susquehanna River Basin Commission jshallenberger@srbc.net - James Webber
U.S. Geological Survey (USGS) jwebber@usgs.gov - Jay Armstrong
Virginia Division of Consolidated Laboratory Services jay.armstrong@dgs.virginia.gov - Jerry Frank
University of Maryland Center for Environmental Science frank@umces.edu - Joe Duris
U.S. Geological Survey (USGS) jwduris@usgs.gov - Joel Blomquist
U.S. Geological Survey (USGS) jdblomqu@usgs.gov - Joshua Inners
Susquehanna River Basin Commission jinners@srbc.net - Julie Reichert-Nguyen
National Oceanic and Atmospheric Administration (NOAA) julie.reichert-nguyen@noaa.gov - Karl Blankenship
Bay Journal bayjournal@earthlink.net - Kaylyn Gootman
U.S. Environmental Protection Agency (EPA) Gootman.Kaylyn@epa.gov - Keith Eshleman
keshleman@al.umces.edu - Kelly Krock
U.S. Environmental Protection Agency (EPA) Krock.Kelly@epa.gov - Ken Hyer
U.S. Geological Survey (USGS) kenhyer@usgs.gov - Kevin Minga
Old Dominion University kminga@odu.edu - Kim Blodnikar
University of Maryland Center for Environmental Science blodnika@umces.edu - Kristen Heyer
Maryland Department of Natural Resources KHeyer@dnr.state.md.us - Kyle Kessler
Susquehanna River Basin Commission kkessler@srbc.net - Lara Johnson
Virginia Department of Forestry Lara.Johnson@dof.virginia.gov - Lara Lutz
Bay Journal llutz@bayjournal.com - Laura Lockhard
Delaware Department of Natural Resources and Environmental Control laura.lockard@delaware.gov - Lexis Carter
Old Dominion University l2carter@odu.edu - Liz Chudoba
Alliance for the Chesapeake Bay lchudoba@allianceforthebay.org - Mariah Smith
Old Dominion University m21smith@odu.edu - Mark Brickner
Pennsylvania Department of Environmental Protection mbrickner@pa.gov - Mark Nardi
U.S. Geological Survey (USGS) mrnardi@usgs.gov - Matthew Stover
Maryland Department of the Environment matthew.stover@maryland.gov - Meg Giitter
University of Maryland Center for Environmental Science mgiitter@umces.edu - Meg Maddox
University of Maryland Center for Environmental Science mmaddox@umces.edu - Meghan Wisswell
Virginia Department of Environmental Quality meighan.wisswell@deq.virginia.gov - Michael Mueller
Fairfax County (VA) Michael.Mueller@fairfaxcounty.gov - Nianhong Chen
University of Maryland Center for Environmental Science nchen@umces.edu - Pam Higgins
Pennsylvania Department of Environmental Protection pahiggins@pa.gov - Peter Tango
U.S. Geological Survey (USGS) ptango@chesapeakebay.net - Praveen Galigutte
Delaware Department of Natural Resources and Environmental Control praveen.galigutte@delaware.gov - Rebecca Murphy
University of Maryland Center for Environmental Science rmurphy@chesapeakebay.net - Reid Downer
Virginia Department of Environmental Quality horace.downer@deq.virginia.gov - Renee Karrh
Maryland Department of Natural Resources rkarrh@DNR.STATE.MD.US - Roque Hernandez
District of Columbia Department of Energy & Environment roque.hernandez@dc.gov - Samira Azemati
Maryland Department of Health samira.azemati@maryland.gov - Sarah Holter
Blue Water Baltimore sholter@bluewaterbaltimore.org - Scott Heidel
Pennsylvania Department of Environmental Protection scheidel@pa.gov - Scott Schroeder
FIALab Instruments, Inc. scott@flowinjection.com - Sidney Anderson
University of Maryland Center for Environmental Science sanderson@umces.edu - Suzanne Doughten
Old Dominion University sdoughten@odu.edu - Tammy Domanski
Anne Arundel Community College tldomanski@aacc.edu - Tammy Zimmerman
U.S. Geological Survey (USGS) tmzimmer@usgs.gov - Tracee Cain
Delaware Department of Natural Resources and Environmental Control tracee.cain@delaware.gov - Tyler Shenk
Susquehanna River Basin Commission tshenk@srbc.net - Veronica Figueroa-Negron
University of Maryland Center for Environmental Science vfigueroa-negron@umces.edu