The Water Almanac reads Michigan's lakes the way a survey chart does: measured depth, water clarity, fish stocking, algae tests and public launches, each from the state or federal agency that keeps the record, with the date we fetched it. Where a lake has no record, the page says nothing rather than guess.
200 lake pages · 67 counties · 15 agency sources
Depths are Michigan DNR survey soundings; clarity is a satellite estimate from Michigan EGLE; stockings come from Michigan DNR Fisheries; algae records from Michigan DHHS and the EPA's CyAN satellites. How we measure explains each one and the traps we found in the data.
Sources named on every page.