Twin Lakes (North)

Water Quality

One measure of a lakes health is the trophic state, which relates to the amount of algae in the water. The average summer trophic state for the last 5 years was 41 (Mesotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Excellent.

Twin Lakes (North) has been monitored by volunteers since 1993. Volunteers monitor water clarity with a black and white Secchi disk. Some also collect water samples, which are sent to the State Lab of Hygiene to be analyzed. Volunteers are the source of the majority of Wisconsin's lake water quality data, and their dedication is greatly appreciated. Additional monitoring has been done through projects funded in part by DNR Aquatic Invasive Species Grants. Reports and graphs featuring data collected by volunteers, DNR staff and others can be viewed below.

Water Quality Reports and Graphs

Station Name	Station ID	Map	Max Year	Reports
North Twin Lake - 180 Ft West Of Military Creek Mouth	643440	Map	1995	Details
North Twin Lake - Deep Hole	643140	Map	2023	Details
North Twin Lake - Herbicide Monitoring Site NT 2	10053822	Map	2020	Details
North Twin Lake - Herbicide Monitoring Site NT1	10048315	Map	2017	Details
North Twin Lake - Herbicide Monitoring Site NT1	10053821	Map	2020	Details
North Twin Lake - Herbicide Monitoring Site NT2	10048316	Map	2017	Details
North Twin Lake - Herbicide Monitoring Site NT3	10048317	Map	2017	Details
North Twin Lake - Herbicide Monitoring Site NT4	10048318	Map	2017	Details
North Twin Lake - Herbicide Monitoring Site NT6	10048320	Map	2017	Details
North Twin Lake - NT-1	10057509	Map	2023	Details
North Twin Lake - NT-2	10057510	Map	2023	Details
North Twin Lake - North Twin Lake	644067	Map	1979	Details
North Twin Lake - Site 1-Mid / North Central Part Of Lake - Deep Hole	643429	Map	2020	Details
North Twin Lake - Site 2-SW Basin	643430	Map	2023	Details
North Twin Lake - Site 3-NE Basin	643435	Map	2018	Details