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Green Lake, Green Lake County

Green Lake, Green Lake County
Photo by Wisconsin DNR

Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
DNR Contacts for Green Lake

Green Lake Association Inc [exit DNR]

Green Lake Preservation Society [exit DNR]

Green Lake Property Owners Association [exit DNR]

Green Lake Sanitary District [exit DNR]

Find A Lake > Green Lake County > Green Lake

Green Lake
Green Lake County, 7920 Acres


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 48 (Mesotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Fair.

Green Lake has been monitored by volunteers since 1986. 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 Lake Grants. Reports and graphs featuring data collected by volunteers, DNR staff and others can be viewed below.

Water Quality Reports and Graphs

Station NameStation IDMapMax YearReports
City Millpond - Channel North (Herbicide Monitoring Site 5)10042074Map2015Details
City Millpond - Channel South (Herbicide Monitoring Site 1)10042070Map2015Details
City Millpond - Eddy Mid (Herbicide Monitoring Site 4)10042073Map2015Details
City Millpond - Eddy North (Herbicide Monitoring Site 6)10042075Map2015Details
City Millpond - Eddy South (Herbicide Monitoring Site 2)10042071Map2015Details
City Millpond -Channel Mid (Herbicide Monitoring Site 3)10042072Map2015Details
County K Marsh - Big Green Lake10044125Map2017Details
Green Lake - B10021522Map2007Details
Green Lake - C10021523Map2007Details
Green Lake - D10021524Map2007Details
Green Lake - E10021525Map2017Details
Green Lake - East Basin10042257Map2015Details
Green Lake - East End Basin - Deep Hole (USGS)243021Map2016Details
Green Lake - Eastern Basin (E-1)10041640Map1999Details
Green Lake - Eastern Basin (E-2)10041641Map1999Details
Green Lake - Eastern Basin (E-3)10041642Map1999Details
Green Lake - Eastern Basin (E-4)10041643Map1999Details
Green Lake - Eastern Basin (E-5)10041644Map1999Details
Green Lake - Eastern Basin (E-6)10041645Map1999Details
Green Lake - Eastern Basin (E-7)10041646Map1999Details
Green Lake - F10021526Map2007Details
Green Lake - G10021527Map2007Details
Green Lake - H10021528Map2007Details
Green Lake - I10021529Map2007Details
Green Lake - J10021530Map2007Details
Green Lake - Main Basin Northern Shore (N-1)10041676Map1999Details
Green Lake - Main Basin Northern Shore (N-2)10041677Map1999Details
Green Lake - Main Basin Northern Shore (N-3)10041678Map1999Details
Green Lake - Main Basin Northern Shore (N-4)10041679Map1999Details
Green Lake - Main Basin Northern Shore (N-5)10041680Map1999Details
Green Lake - Main Basin Northern Shore (N-6)10041681Map1999Details
Green Lake - Main Basin Northern Shore (N-7)10041682Map1999Details
Green Lake - Main Basin Southern Shore (S-3)10041659Map1999Details
Green Lake - Main Basin Southern Shore (S-4)10041660Map1999Details
Green Lake - Main Basin Southern Shore (S-5)10041661Map1999Details
Green Lake - Main Basin Southern Shore (S-8)10041664Map1999Details
Green Lake - Main Basin Southern Shore (S-9)10041665Map1999Details
Green Lake - Mid Lake243046Map2015Details
Green Lake - Middle Site10041638Map1999Details
Green Lake - North East middle site10041639Map1999Details
Green Lake - Norwegian Bay (B-1)10041666Map1999Details
Green Lake - Norwegian Bay (B-10)10041675Map1999Details
Green Lake - Norwegian Bay (B-2)10041667Map1999Details
Green Lake - Norwegian Bay (B-3)10041668Map1999Details
Green Lake - Norwegian Bay (B-4)10041669Map1999Details
Green Lake - Norwegian Bay (B-5)10041670Map1999Details
Green Lake - Norwegian Bay (B-6)10041671Map1999Details
Green Lake - Norwegian Bay (B-7)10041672Map1999Details
Green Lake - Norwegian Bay (B-8)10041673Map1999Details
Green Lake - Norwegian Bay (B-9)10041674Map1999Details
Green Lake - South West station10041636Map1999Details
Green Lake - West Basin10042258Map2015Details
Green Lake - West Basin Deep Hole (USGS)243049Map2017Details
Green Lake - Western Basin (W-1)10041647Map1999Details
Green Lake - Western Basin (W-10)10041655Map1999Details
Green Lake - Western Basin (W-11)10041656Map1999Details
Green Lake - Western Basin (W-2)10041744Map1999Details
Green Lake - Western Basin (W-3)10041648Map1999Details
Green Lake - Western Basin (W-4)10041649Map1999Details
Green Lake - Western Basin (W-5)10041650Map1999Details
Green Lake - Western Basin (W-6)10041651Map1999Details
Green Lake - Western Basin (W-7)10041652Map1999Details
Green Lake - Western Basin (W-8)10041653Map1999Details
Green Lake - Western Basin (W-9)10041654Map1999Details
Green Lake - at CTH A10021521Map2007Details