| CODE | ORGANIZATIONS | PRINCIPAL INVESTIGATORS |
| BMSL | Battelle Marine Sciences Laboratory | Eric Crecelius/ Lisa Lefkovitz |
| CEES | Chesapeake Biological Laboratory Center for Environmental & Estuarine Studies | Robert Mason, Kristin Chaloupka |
| FWS | Fish and Wildlife Service-Green Bay | Mark Holey, Rob Elliot |
| GLERL | Great Lakes Environmental Research Laboratory | Brian Eadie, John Robbins, Dave Edgington |
| GLNPO | Great Lakes National Program Office | Marvin Palmer, Glenn Warren, Dave Anderson |
| IIT | Environmental Engineering - Illinois Institiute of Technology | Tom Holson |
| ISWS | Illinois State Water Survey | Karin Harlin, Kevin Cappo |
| IU | Indiana University | Ilora Basu, Barbara Hillary |
| LLRS | US EPA Large Lakes Research Station | Ron Rossman, Mike Mullin |
| NBSAA | National Biological Survey-Ann Arbor | Bob Hesselberg/ Larry Schmidt, G. Nirugu
John Gannon, Ed Brown, Gary Eck, Jacqueline Savino, Bruce Davis |
| NOAA | National Oceanic and Atmospheric Administration | Pat Van Hoof, Brian Eadie, John Robbins |
| UMI | Dept. of Environmental & Industrial Health - University of Michigan | Jerry Keeler |
| UMNG | Gray Freshwater Biological Institute - U. of Minnesota | Steve Eisenreich/ Shawn Schottler, Tom Franz |
| UMNP | School of Public Health - U. of Minnesota | Deborah Swackhamer |
| UMNS | Dept of Soils, Water, and Climate. - U. of Minnesota, St. Paul | Edward Nater |
| USGS-GR | United States Geological Survey - Grayling | Russ Minnerick |
| USGS-LS | United States Geological Survey - Lansing Michigan | Tom Behrendt |
| USGS-WI | United States Geological Survey Wisconsin | Peter Hughes and Dave Hall |
| UWWCL | University of Wisconsin - Water Chemistry Laboratory | Jim Hurley, Martin Schafer, Sue Cowell |
| WSLH | Wisconsin State Lab. of Hygiene - U. of Wisconsin | Bill Sonzogni |
