| Stokkevannet | Telemark, Norway | 4 | 4 | 0 | 1989-09-13 | |
| Storavatnet | Vestland, Norway | 1 | 1 | 0 | 2007-08-29 | |
| Storavatnet | Vestland, Norway | 5 | 3 | 0 | 1993-09-02 | |
| Storavatnet, Krohnegården | Vestland, Norway | 1 | 1 | 0 | 2015-05-05 | |
| Stordammen | Akershus, Norway | 5 | 5 | 0 | 1989-09-27 | |
| Storelva skole | Troms, Norway | 1 | 1 | 1 | 2013-09-06 | |
| Storsteinen, Jurdalen, Napp | Nordland, Norway | 1 | 1 | 0 | 2013-09-27 | |
| Stortjønna Andås | Nordland, Norway | 2 | 2 | 0 | 2013-09-12 | |
| Sundkilen | Telemark, Norway | 1 | 1 | 0 | 1990-06-01 | |
| Svanevatnet | Rogaland, Norway | 11 | 8 | 0 | 1993-05-26 | |
| Svartaholtjørnet | Vestland, Norway | 25 | 9 | 0 | 1994-05-18 | |
| Svartelva, ved Fløta, Ådalsbruk | Innlandet, Norway | 1 | 1 | 0 | 2005-09-21 | |
| Svartputten | Oslo, Norway | 1 | 1 | 0 | 2003-06-06 | |
| Svartvatnet Tortenlia | Nordland, Norway | 2 | 1 | 2 | 2015-09-24 | |
| Svartåstjern | Buskerud, Norway | 2 | 2 | 0 | 1994-06-06 | |
| Svullrya, Rotna | Innlandet, Norway | 2 | 1 | 2 | 2022-08-25 | |
| Sætertjern | Akershus, Norway | 20 | 11 | 0 | 1994-06-06 | |
| Søndre Aas gård, Holmlia | Oslo, Norway | 2 | 2 | 0 | 2013-06-17 | |
| Testområde | Vestland, Norway | 1 | 1 | 0 | 1992-10-08 | |
| Tjennane | Telemark, Norway | 18 | 13 | 0 | 1994-05-11 | |
| tjennetjenn | Østfold, Norway | 1 | 1 | 0 | 2004-09-09 | |
| Tjødnet ved ungdomsskulen | Vestland, Norway | 2 | 2 | 0 | 2006-06-09 | |
| Tjørnadalstjørni (Vaksdal, Bergsdalen) | Vestland, Norway | 7 | 2 | 0 | 2012-09-18 | |
| Todalen | Buskerud, Norway | 3 | 3 | 0 | 2013-09-03 | |
| Tornesvatnet | Rogaland, Norway | 5 | 3 | 0 | 1993-09-14 | |
| Torsteinsvik | Vestland, Norway | 1 | 1 | 1 | 2007-07-06 | |
| Tovegstjørn, Bolstadhaugen | Vestland, Norway | 2 | 1 | 2 | 2015-11-15 | |
| Tranevannet | Vestland, Norway | 1 | 1 | 0 | 2005-08-22 | |
| Tranevatnet | Vestland, Norway | 9 | 4 | 3 | 2007-05-29 | |
| Tretjønnet | Agder, Norway | 1 | 1 | 0 | 1990-06-26 | |
| Trytetjønnet | Buskerud, Norway | 1 | 1 | 0 | 1990-09-26 | |
| Tussvatnet | Nordland, Norway | 3 | 3 | 0 | 1990-06-07 | |
| Tveitavatnet | Vestland, Norway | 22 | 12 | 0 | 1992-10-01 | |
| Tveitevannet | Vestland, Norway | 4 | 4 | 0 | 2009-09-15 | |
| Tylldalen skole | Innlandet, Norway | 1 | 1 | 0 | 2013-10-14 | |
| Tømmervatnet | Troms, Norway | 1 | 1 | 0 | 1993-09-17 | |
| Vaksvik | Møre og Romsdal, Norway | 1 | 1 | 0 | 2023-06-24 | |
| Vassbotnen | Møre og Romsdal, Norway | 2 | 2 | 0 | 2013-09-25 | |
| Vasslivatnet | Rogaland, Norway | 4 | 4 | 0 | 1992-06-04 | |
| Ved Svinndal kirke | Østfold, Norway | 1 | 1 | 0 | 2013-09-25 | |
| Vetletjørn | Vestland, Norway | 1 | 1 | 0 | 2018-09-10 | |
| Vikerauntjønna | Trøndelag, Norway | 12 | 6 | 0 | 1993-09-15 | |
| Vollsvannet | Trøndelag, Norway | 1 | 1 | 0 | 2014-05-19 | |
| Vollsvatnet | Trøndelag, Norway | 11 | 2 | 5 | 2015-08-31 | |
| Vålåsjøen | Innlandet, Norway | 4 | 1 | 0 | 1993-06-09 | |
| Ærdalsbassenget | Agder, Norway | 3 | 3 | 0 | 2016-06-16 | |
| Ørsjøen | Innlandet, Norway | 4 | 3 | 0 | 1994-06-07 | |
| Østernvannet | Akershus, Norway | 4 | 4 | 0 | 1990-08-28 | |
| Øvre Mjølsnes | Rogaland, Norway | 1 | 1 | 0 | 2009-05-30 | |
| Øygårdsvannet | Agder, Norway | 1 | 1 | 0 | 2015-06-20 | |