The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer.
Tracer Dye Studies - General Information
Tracer Dye Studies - General Information
EGLE has regulatory jurisdiction over application or discharge of tracer dyes to surface waters of the state (Rule 97 of the Water Quality Standards, promulgated under Part 31, Water Resources Protection, of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended [NREPA]).
Under R 323.1097 of the Michigan Water Quality Standards the Water Resources Division (WRD) is responsible for approving projects where tracer dyes are applied or may be discharged to surface waters of the state. Surface waters of the state are defined as the Great Lakes and their connecting waters, inland lakes, rivers, streams, impoundments, open drains, wetlands, and other surface bodies of water within the confines of the state.
The following link details EGLE process for obtaining authorization to use tracer dyes: EGLE Process for Tracer Dye Studies