Below are listed the Secchi disk transparencies obtained in the 1998 Secchi Dip-In.
| Country | State | Program | Participants | SD (m) | SD (Ft) |
| Australia | N.S.W. | Department of Environmental Sciences | 1 | 0.76 | 2.5 |
| Canada | BC | Ministry of the Environment, Lands & Parks | 8 | 5.64 | 18.5 |
| BC | Turtle Island Earth Stewards | 1 | 0.78 | 2.6 | |
| NB | Maine Volunteer Lake Monitoring Program | 3 | 4.45 | 14.6 | |
| ON | Ontario Cottage Owners Association (?) | 389 | 4.33 | 14.2 | |
| QC | APPEL Water Quality Testing Program | 1 | 4.57 | 15.0 | |
| Friends of the Gatineau River | 2 | 2.42 | 8.0 | ||
| USA | AL | Baywatch | 16 | 0.74 | 2.4 |
| CaWaCo Res. Conserv. & Develop. Council | 2 | 0.97 | 3.2 | ||
| Lake Watch of Lake Martin | 3 | 2.41 | 7.9 | ||
| Wolf Bay Watershed Watch | 2 | 0.14 | 0.5 | ||
| CA | Chris Holdren's Friends | 1 | 5.06 | 16.6 | |
| GLOBE Program Instructor | 1 | 3.61 | 11.8 | ||
| Muir Beach Environmental | 1 | - | - | ||
| Water Environment Studies Program | 4 | 0.36 | 1.2 | ||
| CO | Chris Holdren's Friends | 2 | 1.71 | 5.6 | |
| Grand Lake Water Quality Monitoring Program | 1 | 3.50 | 11.5 | ||
| CT | Adopt-A-Harbor | 5 | 1.24 | 4.1 | |
| Bashan Lake Assoc. | 1 | 8.23 | 27.0 | ||
| Highland Lake Watershed Association | 1 | 4.30 | 14.1 | ||
| Northeast Aquatic Research | 2 | 3.07 | 10.1 | ||
| FL | Citizens Vol. WQM Netwk. for the Indian River Lagoon | 26 | 0.77 | 2.5 | |
| Environmental Mgmt. County of Volusia | 17 | 0.80 | 2.6 | ||
| Florida LAKEWATCH | 104 | 1.58 | 5.2 | ||
| Hillsborough Lake Management Program | 1 | 1.07 | 3.5 | ||
| Lake Jesup Water Quality Monitoring Project | 1 | 0.28 | 0.9 | ||
| Orange County Adopt-A-Lake | 7 | 1.54 | 5.0 | ||
| Three Creek Watch/Lemon Bay | 15 | 1.23 | 4.0 | ||
| Water Resources Management | 3 | 0.60 | 2.0 | ||
| Wildpine Laboratory | 6 | 0.88 | 2.9 | ||
| GA | Georgia Lake Management Society | 2 | 0.89 | 2.9 | |
| Lake Hartwell Association | 1 | 2.70 | 8.9 | ||
| Lake Lanier Citizen's Monitoring Program | 1 | 2.33 | 7.6 | ||
| HI | Volunteer Water Quality Monitoring Program | 2 | 1.76 | 5.8 | |
| IA | Des Moines River Water Quality Network | 2 | 1.30 | 4.3 | |
| Flint Creek Water Quality | 1 | 0.24 | 0.8 | ||
| Iowa DNR | 3 | 0.22 | 0.7 | ||
| Water Quality Monitoring | 1 | 0.49 | 1.6 | ||
| West Lyon FFA | 1 | 0.63 | 2.1 | ||
| IL | Illinois Vol Lake Monitoring Program | 60 | 0.97 | 3.2 | |
| NE Illinois Planning Commission | 1 | 3.34 | 10.9 | ||
| The Illinois' Rivers Project | 1 | 1.20 | 3.9 | ||
| IN | Indiana Vol Lake Monitoring Prog | 62 | 1.95 | 6.4 | |
| Water Watchers of Indiana | 1 | 1.68 | 5.5 | ||
| KS | Clean Lakes Coordinator | 14 | 1.04 | 3.4 | |
| Oklahoma Water Watch | 3 | 0.57 | 1.9 | ||
| KY | Citizens Lake Assessment and Monitoring (CLAM) | 1 | 2.35 | 7.7 | |
| Doe Run Lake Water Watch | 1 | 0.61 | 2.0 | ||
| MA | Buzzards Bay Citizen's Water Quality Monitoring Prog. | 19 | 1.43 | 4.7 | |
| Linganore Trailblazers Environmental Committee | 1 | - | - | ||
| Massachusetts Water Watch Partnership | 50 | 1.95 | 6.4 | ||
| Northeast Aquatic Research | 1 | 1.62 | 5.3 | ||
| Orleans Marine Water Quality Task Force | 5 | 1.34 | 4.4 | ||
| Salem Sound 2000 Inc | 1 | 3.00 | 9.8 | ||
| MD | Chesapeake Bay Citizen Monitoring Prog - VA | 9 | 0.77 | 2.5 | |
| Linganore Trailblazers Environmental Committee | 1 | 0.91 | 3.0 | ||
| Magothy River Monitoring | 1 | 0.66 | 2.2 | ||
| Maryland Coastal Bays Vol. Water Qual. Monitoring Prog. | 15 | 0.53 | 1.8 | ||
| Maine Volunteer Lake Monitoring Program | 107 | 4.87 | 16.0 | ||
| NH Lakes Lay Monitoring Prog | 1 | 2.50 | 8.2 | ||
| Maine Volunteer Lake Monitoring Program | 1 | 6.50 | 21.3 | ||
| MI | Arnold Lake Prop Owners Assoc | 1 | 5.79 | 19.0 | |
| Cooperative Lakes Monitoring Program | 131 | 3.46 | 11.4 | ||
| Lake Watch/Baseline | 7 | 4.10 | 13.4 | ||
| Missaukee Soil and Water Conservation District | 1 | 2.53 | 8.3 | ||
| Tip of the Mitt Volunteer Lake Monitoring Program | 23 | 3.85 | 12.6 | ||
| Wisconsin Adopt-A-Lake | 4 | 4.43 | 14.5 | ||
| MN | Citizen Lake Monitoring Program | 483 | 2.62 | 8.6 | |
| Citizen-Assisted Monitoring Program (CAMP) | 11 | 1.06 | 3.5 | ||
| Forest Lake Watershed Management Org | 2 | 2.79 | 9.2 | ||
| Maine Volunteer Lake Monitoring Program | 1 | 2.13 | 7.0 | ||
| Program Unknown | 2 | 1.95 | 6.4 | ||
| Upper South Long Lake Improvement Association | 1 | 2.42 | 7.9 | ||
| MO | Lakes of Missouri Volunteer Program | 13 | 1.16 | 3.8 | |
| MT | Flathead Basin Volunteer Monitoring | 22 | 6.47 | 21.2 | |
| Volunteer Lake Monitoring | 13 | 4.86 | 16.0 | ||
| NC | Albemarle-Pamlico Citizens Water Qual. Monitoring Prog. | 13 | 0.72 | 2.4 | |
| Estuary-Net Water Qality Monitoring Program | 5 | 1.26 | 4.1 | ||
| Town of Butner | 1 | 1.37 | 4.5 | ||
| ND | Surface Water Program | 1 | 3.45 | 11.3 | |
| NE | Chris Holdren's Friends | 4 | 0.08 | 0.3 | |
| NH | Great Bay Watch | 12 | 0.50 | 1.6 | |
| Lake Sunapee Water Monitoring | 8 | 3.79 | 12.4 | ||
| NH Lakes Lay Monitoring Prog | 29 | 4.74 | 15.5 | ||
| NH Volunteer Lake Assessment Prog | 18 | 3.99 | 13.1 | ||
| Program Unknown | 1 | 5.65 | 18.5 | ||
| NJ | Fairview Lake | 1 | 2.56 | 8.4 | |
| Lake Owassa Community Association | 1 | 1.13 | 3.7 | ||
| NV | Chris Holdren's Friends | 1 | 6.50 | 21.3 | |
| NY | Adopt-A-Harbor | 3 | 1.00 | 3.3 | |
| Lake George Lay Monitoring Program | 17 | 6.83 | 22.4 | ||
| Northeast Aquatic Research | 1 | 3.25 | 10.7 | ||
| NY Citizens Statewide Lake Assessment Prog. (CSLAP) | 53 | 3.29 | 10.8 | ||
| NYC Dept Envir Protection | 15 | 2.99 | 9.8 | ||
| Program Unknown | 1 | 3.50 | 11.5 | ||
| Water Quality Monitoring | 6 | 2.56 | 8.4 | ||
| OH | Citizens Lake Assessment and Monitoring (CLAM) | 42 | 0.53 | 1.7 | |
| Crosley Lake Monitoring Project | 1 | 0.91 | 3.0 | ||
| Hamilton County Park District | 4 | 0.80 | 2.6 | ||
| NEFCO Volunteer Lake Monitoring Program | 8 | 1.49 | 4.9 | ||
| Trumbull Area Multi-Purpose Environ Ed Lab | 1 | 2.74 | 9.0 | ||
| OK | Creek Turnpike Wetlands | 1 | 0.60 | 2.0 | |
| Oklahoma Water Watch | 53 | 0.66 | 2.2 | ||
| OR | Lake Oswego Corporation | 1 | 1.38 | 4.5 | |
| Oregon Citizen Lake Watch | 14 | 2.72 | 8.9 | ||
| PA | Lake Sheridan Tarn Watch | 1 | 3.25 | 10.7 | |
| NY Citizens Statewide Lake Assessment Prog. (CSLAP) | 1 | 1.00 | 3.3 | ||
| Shawnee State Park | 1 | - | - | ||
| State Lakes and 319 Coordinator | 21 | 1.52 | 5.0 | ||
| RI | Adopt-A-River Program | 1 | 2.00 | 6.6 | |
| URI Watershed Watch | 33 | 1.66 | 5.4 | ||
| SC | FOLKS Water Clarity | 16 | 3.71 | 12.2 | |
| Lake Hartwell Association | 7 | 2.60 | 8.5 | ||
| Lake Murray Lakewatch | 1 | 2.30 | 7.5 | ||
| SD | Citizen Lake Monitoring | 4 | 0.68 | 2.2 | |
| TN | Garner Lake Homeowners Ass | 1 | 1.00 | 3.3 | |
| TX | Brazos Basin Citizens Monitoring | 16 | 0.86 | 2.8 | |
| Galveston Bay Foundation | 9 | 0.34 | 1.1 | ||
| Oklahoma Water Watch | 1 | 1.92 | 6.3 | ||
| Texas Watch Volunteer Environmental Monitoring | 18 | 0.47 | 1.6 | ||
| VA | Chesapeake Bay Citizen Monitoring Prog - VA | 21 | 0.71 | 2.3 | |
| Chesapeake Bay Foundation | 1 | 1.20 | 3.9 | ||
| Chesapeake Bay Youth Conservation Corps | 4 | 0.26 | 0.9 | ||
| Chris Holdren's Friends | 1 | 1.73 | 5.7 | ||
| Smith Mountain Lake Volunteer Water Quality Monitoring | 1 | 2.43 | 8.0 | ||
| VT | Vermont Lay Monitoring Program | 37 | 4.45 | 14.6 | |
| WA | King County Lake Stewardship Program | 36 | 3.29 | 10.8 | |
| Snohomish County Lake Management Prog | 14 | 1.97 | 6.5 | ||
| Washington's Citizen Lake Monitoring Project | 34 | 3.64 | 11.9 | ||
| WI | Dane County Water Education Resource Center | 1 | 1.83 | 6.0 | |
| Wisconsin Adopt-A-Lake | 19 | 2.27 | 7.4 | ||
| Wisconsin Self-Help Lake Monitoring Program | 298 | 3.02 | 9.9 | ||
| WV | Chris Holdren's Friends | 1 | 0.56 | 1.8 |
For more information on the Great American Secchi Dip-In, contact Bob Carlson at: RCarlson@kent.edu or write
Great American Secchi Dip-InUpdated: June 19, 2006