Alton is located in IL at coordinates 38.8895°N, 90.1894°W. Water level data is provided by US Army Corps of Engineers. The latest reading is 418.77 ft.
A small badge a marina, lake association or guide can paste on their site. It always includes a link back to Alton on LakeLevels — that is the entire point.
Recommended — places a real link on the host page.