| Tonningsøyra | Vestland, Norway | 2 | 1 | 2 | 2022-08-24 | |
| Toppesanden | Vestland, Norway | 1 | 1 | 1 | 2020-09-28 | |
| Toppås | Akershus, Norway | 1 | 1 | 1 | 2020-09-24 | |
| Tornesvatnet | Rogaland, Norway | 3 | 3 | 0 | 1989-09-07 | |
| Torshaug | Trøndelag, Norway | 1 | 1 | 0 | 2003-04-25 | |
| Torshov kirke | Oslo, Norway | 1 | 1 | 1 | 2020-09-15 | |
| Totenvika | Innlandet, Norway | 1 | 1 | 0 | 2007-04-16 | |
| Tranbergbakken | Innlandet, Norway | 1 | 1 | 0 | 2020-09-16 | |
| Traverbanen | Vestland, Norway | 2 | 2 | 2 | 2013-05-22 | |
| Tresodden | Rogaland, Norway | 1 | 1 | 0 | 2022-05-31 | |
| Tretjønnet | Agder, Norway | 2 | 1 | 0 | 1990-06-26 | |
| Trollkjærra (Fjære) | Agder, Norway | 1 | 1 | 0 | 2018-01-31 | |
| Tromsdalen | Troms, Norway | 1 | 1 | 0 | 2007-06-05 | |
| Tromsøya | Troms, Norway | 7 | 2 | 0 | 2005-10-27 | |
| Tråstad Ungdomsskole | Innlandet, Norway | 2 | 1 | 1 | 2015-06-02 | |
| Tursted Borge | Telemark, Norway | 4 | 3 | 0 | 2011-06-06 | |
| Tussvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Tveidevik | Rogaland, Norway | 1 | 1 | 1 | 2020-09-29 | |
| Tveiteskogen (Askøy) | Vestland, Norway | 1 | 1 | 0 | 2010-09-11 | |
| Tveitevannet | Vestland, Norway | 3 | 3 | 2 | 2014-05-22 | |
| Tveitevannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| tyholmen vgs skolegår | Agder, Norway | 1 | 1 | 0 | 2022-09-05 | |
| Tyholt | Trøndelag, Norway | 3 | 2 | 0 | 2023-05-28 | |
| tylldalen | Innlandet, Norway | 1 | 1 | 1 | 2012-08-24 | |
| Tylldalen | Innlandet, Norway | 1 | 1 | 1 | 2012-08-22 | |
| Tylldalen | Innlandet, Norway | 3 | 2 | 3 | 2012-08-22 | |
| Tylldalen | Innlandet, Norway | 12 | 3 | 4 | 2012-06-05 | |
| Tylldalen skole | Innlandet, Norway | 1 | 1 | 0 | 2016-06-06 | |
| Tømmervatnet | Troms, Norway | 1 | 1 | 0 | 1993-09-17 | |
| Ullern vgs | Oslo, Norway | 5 | 1 | 0 | 2017-09-04 | |
| Ullern videregående skole | Oslo, Norway | 6 | 1 | 5 | 2015-09-17 | |
| Ulriksbotn | Vestland, Norway | 1 | 1 | 1 | 2020-09-24 | |
| Ulveset utmark | Vestland, Norway | 1 | 1 | 1 | 2012-09-21 | |
| Ulvøyna | Vestland, Norway | 1 | 1 | 1 | 2020-09-23 | |
| Undredal | Vestland, Norway | 4 | 3 | 5 | 2008-05-01 | |
| Universitetet i Nordland, Campus | Nordland, Norway | 2 | 1 | 0 | 2014-10-10 | |
| Uradalsvegen | Rogaland, Norway | 1 | 1 | 1 | 2020-09-23 | |
| Uranes | Vestland, Norway | 3 | 2 | 0 | 2008-05-05 | |
| Uraskjeret | Vestland, Norway | 1 | 1 | 1 | 2020-09-23 | |
| Ustaoset | Buskerud, Norway | 1 | 1 | 0 | 2016-07-29 | |
| Uteklasserommet | Møre og Romsdal, Norway | 1 | 1 | 0 | 2007-09-05 | |
| Uteskole-plassen | Vestfold, Norway | 1 | 1 | 0 | 2010-04-30 | |
| Vaksvik | Møre og Romsdal, Norway | 115 | 23 | 2 | 2024-06-30 | |
| Valle videregående skole | Innlandet, Norway | 2 | 1 | 1 | 2018-09-24 | |
| Vang barne- og ungdomsskule | Innlandet, Norway | 3 | 3 | 0 | 2015-09-07 | |
| Vangshaugen | Trøndelag, Norway | 1 | 1 | 1 | 2020-09-16 | |
| Vardafjellet | Rogaland, Norway | 2 | 2 | 2 | 2020-09-04 | |
| Vardeveien | Akershus, Norway | 1 | 1 | 1 | 2024-06-05 | |
| vassenden | Innlandet, Norway | 1 | 1 | 0 | 2019-09-10 | |
| Vassetsætra | Møre og Romsdal, Norway | 9 | 2 | 0 | 2009-09-04 | |
Sustain.no is provided by the Norwegian Centre for Science Education