Petenwell Lake has been monitored by volunteers since 2005. Volunteers monitor water clarity with a black and white Secchi disk. 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.
| Station Name | Station ID | Map | Max Year | Reports |
|---|
| 503 Barnum Bay Trail | 10034892 | Map | 2010 | Details |
| Castle Rock Lake - N Of Yellow R Arm / Petenwell Sed Up (T20nr5es09) | 293126 | Map | 1996 | Details |
| Castle Rock Lake - West Side Just Ab Dam / Petenwell Sed Mid (T20nr5es32) | 293127 | Map | 1996 | Details |
| Juneau County Wilderness Park bay | 10031202 | Map | 2012 | Details |
| Petenwell Flowage | 10021022 | Map | 1994 | Details |
| Petenwell Flowage - 0.5 mi. NE of 10th St. boat landing | 10031207 | Map | 2012 | Details |
| Petenwell Flowage - 0.5 mi. W of Petenwell Cty Pk | 10031206 | Map | 2012 | Details |
| Petenwell Flowage - 0.75 mi. south of 10th St. boat landing | 10031208 | Map | 2012 | Details |
| Petenwell Flowage - 1 Mi Blw Yellow Bk | 293146 | Map | 1998 | Details |
| Petenwell Flowage - 1 Mi Se Halls Pt | 013170 | Map | 1998 | Details |
| Petenwell Flowage - 1 Mi Se Longview Pt | 013169 | Map | 2023 | Details |
| Petenwell Flowage - 1 Mile Ab Dam | 013162 | Map | 1998 | Details |
| Petenwell Flowage - 2 Mi Abv Dam | 293149 | Map | 2012 | Details |
| Petenwell Flowage - 2.2 mi. NE of dam | 10031210 | Map | 2012 | Details |
| Petenwell Flowage - 2.2 mi. SW of Petenwell Co. Park | 10031209 | Map | 2012 | Details |
| Petenwell Flowage - 3 Mi Abv Dam | 293148 | Map | 1998 | Details |
| Petenwell Flowage - Barnum Bay | 10031201 | Map | 2012 | Details |
| Petenwell Flowage - County Park Monroe Center - Offshore Cylindro Sample | 013180 | Map | 2005 | Details |
| Petenwell Flowage - Deep Hole | 013134 | Map | 2015 | Details |
| Petenwell Flowage - NE Of Longview Pt | 013168 | Map | 2015 | Details |
| Petenwell Flowage - NW of Petenwell County Park | 10031205 | Map | 2012 | Details |
| Petenwell Flowage - Near 20th Ave. | 293138 | Map | 1998 | Details |
| Petenwell Flowage - Pilot Cove | 293134 | Map | 1993 | Details |
| Petenwell Flowage - Sandbar @ Wisconsin River Mouth | 10057939 | Map | 2023 | Details |
| Petenwell Flowage - Sed Mid T19nr05e18 | 013154 | Map | 2012 | Details |
| Petenwell Flowage - Strongs Prairie Flats at 3 mi. NE of dam | 10031211 | Map | 2012 | Details |
| Petenwell Flowage - West Of Barnum Bay | 013164 | Map | 1998 | Details |
| Petenwell Flowage 01 (1.8 miles US of dam) | 10031171 | Map | 2015 | Details |
| Petenwell Flowage 02 (4.7 miles US of dam) | 10031170 | Map | 2015 | Details |
| Petenwell Flowage 03 (7.8 miles US of dam) | 10031169 | Map | 2015 | Details |
| Petenwell Flowage 1 Mi Se Of Longview Point | 10021041 | Map | 1998 | Details |
| Petenwell Flowage 2 Mi Se Of Armenia Boat Landing. | 10021053 | Map | 1998 | Details |
| Petenwell Flowage River Mile 180.2 | 10021031 | Map | 1994 | Details |
| Petenwell Flowage Rm 185.4 | 10021032 | Map | 1994 | Details |
| Petenwell Flowage TMDL monitoring 04 (10.4 miles US of dam) | 10031168 | Map | 2015 | Details |
| Petenwell Flowage at Barnum Bay | 293140 | Map | 2009 | Details |
| Petenwell Flowage at Halls Point | 293147 | Map | 2015 | Details |
| Petenwell Flowage at Mi Above Dam Deepest Point | 10021040 | Map | 1998 | Details |
| Petenwell Flowage at Yellow Banks | 293145 | Map | 1998 | Details |
| Petenwell Lake - Dock 1-2 at Adams Co. Petenwell Park S of boat basin | 10033600 | Map | 2023 | Details |
| Petenwell Lake - Off Private Dock - Arkdale | 10029567 | Map | 2023 | Details |
| Upper Petenwell Flowage - SW of Cattail Islands | 10031196 | Map | 2012 | Details |
| Upper Petenwell Flowage - SW of Duck Island | 10031197 | Map | 2012 | Details |
| Upper Petenwell Flowage - Yellow Banks | 10031198 | Map | 2012 | Details |
| Upper Petenwell Flowage - east of Hochee Point | 10031200 | Map | 2012 | Details |
| Upper Petenwell Flowage - south of Catfish Bay | 10031199 | Map | 2012 | Details |
| West Petenwell Ditch - 10th St. | 293060 | Map | 1982 | Details |
| West Petenwell Ditch - Ditch-16th Ave And 13th | 293061 | Map | 1981 | Details |
| Wisconsin River - 1 Mi Ne Of Yellow Banks | 293144 | Map | 1998 | Details |
| Wisconsin River - Above Petenwell Dam | 013023 | Map | 1981 | Details |
| Wisconsin River - Near Monroe Park | 013020 | Map | 1975 | Details |
| Wisconsin River - Near Petenwell Park | 013021 | Map | 1975 | Details |
| Wisconsin River - Near Violet Lawn School | 013019 | Map | 1979 | Details |
| Wisconsin River Petenwell Flowage - 1 Mile North Of Long View Point | 013015 | Map | 1993 | Details |
| Wisconsin River Petenwell Flowage - Off Wilderness Park | 013004 | Map | 1993 | Details |
| Wisconsin River at Fish Lake | 121 | Map | 1976 | Details |
| Wisconsin River at Lake Petenwell | 122 | Map | 1976 | Details |
| Wisconsin River at New Rome | 013017 | Map | 1981 | Details |
| Wisconsin River-Petenwell Flowage - Nw Of East Dike | 013166 | Map | 1996 | Details |
| Wisconsin River-Petenwell Flowage - West Of Adams County Park | 013165 | Map | 1996 | Details |