| CODE | LABORATORY NAME |
| AREAL | Atmospheric Research Exposure Lab |
| BMSL | Batelle Marine Science Laboratory |
| CEES | Chesapeake Biological Laboratory-Center for Environmental and Estuarine Studies |
| FWS | Fish and Wildlife Service-Green Bay |
| *GLAS | Great Lakes Analytical Support |
| IIT | Illinois Institute of Technology Dept. of Environmental Engineering |
| ISWS | Illinois State Water Survey |
| IU | Indiana University |
| LLRS | US EPA Large Lakes Research Station |
| NBSAA | National Biological Survey-Ann Arbor |
| NOAA | National Oceanic and Atmospheric Administration |
| UMI | University of Michigan Dept. of Environmental & Industrial Health |
| UMNG | University of Minnesota Gray Freshwater Biological Institute |
| UMNP | Univ. of Minn. School of Public Health |
| UMNS | Univ. of Minnesota Soils Department |
| USGS-CO | United States Geological Survey Colorado |
| USGS-WI | United States Geological Survey Wisconsin |
| UWWCL | Univ. of Wisc. - Water Chemistry Lab |
| WDNR | Wisconsin Department of Natural Resources Southern District Headquarters |
| WSLH | Wisconsin State Laboratory of Hygiene |
