Phylum: Diatoms (Bacillariophyta)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Sillongen | Innlandet, Norway | 10 | 6 | 0 | 1990-05-22 | |
| Skadberg | Rogaland, Norway | 1 | 1 | 0 | 1994-06-02 | |
| Skarvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skatestraumen | Vestland, Norway | 1 | 1 | 0 | 2006-09-05 | |
| Skjelbreidvatnet | Vestland, Norway | 3 | 2 | 0 | 1991-06-06 | |
| Slidrefjorden | Innlandet, Norway | 2 | 1 | 0 | 2012-05-16 | |
| Spildervatnet | Nordland, Norway | 19 | 8 | 0 | 1994-06-02 | |
| Stavsjø | Innlandet, Norway | 26 | 10 | 0 | 1993-09-24 | |
| Steglevannet | Buskerud, Norway | 2 | 2 | 0 | 1989-10-06 | |
| Stikla | Østfold, Norway | 1 | 1 | 0 | 1994-06-08 | |
| Stokkavatnet | Nordland, Norway | 4 | 2 | 0 | 1990-09-18 | |
| Storavatnet | Vestland, Norway | 11 | 3 | 0 | 1993-09-02 | |
| Stordammen | Akershus, Norway | 3 | 3 | 0 | 1989-09-27 | |
| Store Bjørnevatnet | Agder, Norway | 2 | 2 | 0 | 1989-08-30 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Storvannet | Nordland, Norway | 4 | 3 | 0 | 1990-09-07 | |
| Sundkilen | Telemark, Norway | 8 | 7 | 0 | 1990-06-01 | |
| Svanevatnet | Rogaland, Norway | 10 | 5 | 0 | 1991-06-18 | |
| Svartaholtjørnet | Vestland, Norway | 12 | 6 | 0 | 1996-09-17 | |
| Svartputten | Oslo, Norway | 1 | 1 | 0 | 2003-06-06 | |
| Svartåstjern | Buskerud, Norway | 8 | 4 | 0 | 1994-06-06 | |
| Sælenvannet | Vestland, Norway | 1 | 1 | 0 | 1989-11-08 | |
| Testområde | Vestland, Norway | 1 | 1 | 0 | 1991-09-26 | |
| Tjennane | Telemark, Norway | 4 | 4 | 0 | 1994-09-06 | |
| Tornesvatnet | Rogaland, Norway | 24 | 16 | 0 | 1994-09-05 | |
| Tretjønnet | Agder, Norway | 1 | 1 | 0 | 1990-06-26 | |
| Trytetjønnet | Buskerud, Norway | 3 | 1 | 0 | 1990-06-14 | |
| Tveitavatnet | Vestland, Norway | 9 | 3 | 0 | 1991-05-23 | |
| Tveitevannet | Vestland, Norway | 5 | 5 | 0 | 1992-09-10 | |
| Tømmervatnet | Troms, Norway | 2 | 2 | 0 | 1994-09-16 | |
| Ulfsbakktjønn | Vestfold, Norway | 4 | 4 | 0 | 1996-09-25 | |
| V. Måsane | Akershus, Norway | 4 | 1 | 0 | 1996-08-21 | |
| Vangsmjøsa | Innlandet, Norway | 1 | 1 | 0 | 2016-09-12 | |
| Vangsmjøsa | Innlandet, Norway | 1 | 1 | 0 | 2016-09-12 | |
| Vasslivatnet | Rogaland, Norway | 3 | 3 | 0 | 1990-10-04 | |
| Vestre Åmøy | Rogaland, Norway | 1 | 1 | 0 | 1993-10-11 | |
| Vikerauntjønna | Trøndelag, Norway | 7 | 3 | 0 | 1993-09-04 | |
| Vålåsjøen | Innlandet, Norway | 8 | 4 | 0 | 1993-06-09 | |
| Øksnevadtjørna | Rogaland, Norway | 4 | 3 | 0 | 1993-10-07 | |
| Ørsjøen | Innlandet, Norway | 3 | 2 | 0 | 1994-09-22 | |
| Østernvannet | Akershus, Norway | 5 | 3 | 0 | 1990-08-28 | |
| Øvre Storfjordvatnet | Nordland, Norway | 11 | 5 | 0 | 1991-09-04 | |
| Årstadtjødne | Rogaland, Norway | 4 | 2 | 0 | 1996-10-11 | |
| Årungen | Akershus, Norway | 19 | 8 | 0 | 1996-09-16 | |
| Åstveitvannet | Vestland, Norway | 10 | 4 | 0 | 1991-09-27 | |
Sustain.no is provided by the Norwegian Centre for Science Education