The Aug. 19 editorial, "Great Lakes' Water Level Not Rising," rejects a claim that no scientist is making. I'm confident that scientists who study the Great Lakes are well aware of the NOAA Great Lakes water level data. The function of the Graham Sustainability Institute map (www.graham.umich.edu/glaac/great-lakes-atlas) that you refer to is to provide socioeconomic and basic climate data to Great Lakes counties from Minnesota to New York. The climate data presented are very basic: summer temperature (average), winter temperature (average), spring precipitation (total) and the summer drought index. If you will look at the map, you will see that lake levels are not discussed.