| Brunswick School (Upper Middle) | Greenwich, CT | 295 | 34 | - |
| Chadwick Homeowners Assn., Inc. | Old Lyme, CT | 292 | 136 | - |
| The Weston Field Club - Well #1 | Weston, CT | 291 | 180 | - |
| Arrowhead by the Lake Association, Inc. | Seymour, CT | 288 | 117 | - |
| Macedonia Brook S.p./Camp Site #30 | Portland, CT | 287 | 21 | - |
| Aquarion-Oakwood Acres | Shelton, CT | 286 | 17 | - |
| John Lyman School | Durham, CT | 285 | 19 | - |
| Old Farms Condominium Association Inc | New Milford, CT | 285 | 498 | - |
| Chaplin Elementary School | Chaplin, CT | 280 | 88 | - |
| Torrington Country Club | Goshen, CT | 280 | 56 | - |
| Colchester Estates | Monsey, CT | 276 | 203 | - |
| West Hill Lake Water Assoc. | Canton, CT | 276 | 270 | - |
| Walden Apartments | Willington, CT | 276 | 167 | - |
| Crystal Lake School | Ellington, CT | 275 | 60 | - |
| Parkway School | Greenwich, CT | 275 | 90 | - |
| Whitcraft LLC | Eastford, CT | 272 | 322 | - |
| St. Thomas More School-Main System | Oakdale, CT | 270 | 135 | - |
| Moosup Garden Apartments | Weatogue, CT | 270 | 66 | - |
| Pine Point School-Campbell | Stonington, CT | 267 | 248 | - |
| Pine Point School-Mitchell | Stonington, CT | 267 | 239 | - |
| Marianapolis Prep School - Admin/School | Thompson, CT | 266 | 96 | - |
| Ctwc - Banner Village | Clinton, CT | 265 | 43 | - |
| Aquarion-Forest Hills | Shelton, CT | 265 | 205 | - |
| Bridgewater Plaza Convenience Store | Bridgewater, CT | 262 | 22 | - |
| St. Thomas More School-Fieldhouse | Oakdale, CT | 260 | 2 | - |
| The Grumman Hill Montessori Association | Wilton, CT | 259 | 116 | - |
| James Morris School | Litchfield, CT | 258 | 339 | - |
| Woodbury Knoll, LLC. | Watertown, CT | 258 | 207 | - |
| Tranquility Vineyard and Winery | Middlebury, CT | 257 | 0 | - |
| Ctwc - Northern Region-Lakewood | Clinton, CT | 256 | 143 | - |
| Matulaitis Nursing Home | Putnam, CT | 254 | 28 | - |
| Ctwc - Westchester Village | Clinton, CT | 252 | 340 | - |
| Harvest Time Assembly of God | Greenwich, CT | 250 | 137 | - |
| Rogers Corp - Rogers Well | Rogers, CT | 250 | 57 | - |
| Johnson Memorial Hospital, Inc | Stafford Springs, CT | 250 | 172 | - |
| South Broad Street Service Area | Wallingford, CT | 250 | 9 | - |
| Pine Grove Association, Inc. | Arlington, CT | 248 | 82 | - |
| Washington Primary School | Washington, CT | 247 | 19 | - |
| Devereux Glenholme School - Main Campus | Washington, CT | 245 | 111 | - |
| Aquarion-Indian Spring | Shelton, CT | 242 | 58 | - |
| Apple Rehab | Avon, CT | 238 | 12 | - |
| Country Kids Child Care | Scottsdale, CT | 234 | 43 | - |
| Ctwc - Uconn Hunting Lodge Div. | Clinton, CT | 234 | 0 | - |
| Candle Hill Mobile Home Park | Stamford, CT | 233 | 156 | - |
| Pequot Ledge Campground | Oakdale, CT | 231 | 109 | - |
| Ctwc - Pilgrim Hills Division | Clinton, CT | 229 | 23 | - |
| South Kent School | South Kent, CT | 228 | 229 | - |
| Blue Trails Water Association | Durham, CT | 228 | 178 | - |
| Ctwc - Chimney Hill | Clinton, CT | 227 | 2 | - |
| Westchester Hills Condominium Assn. | Mystic, CT | 225 | 131 | - |