How is lake water quality measured in Norway?

61 named lakes in Norway have official phosphorus, chlorophyll-a, and Secchi from the Norwegian Environment Agency, via UNEP GEMS/Water (OPEN GFQA), 2017–2023. These are the authority's own measurements, shown as reported.

Whose ratings do the Norway lake pages show?

The publishing authority's own. Pages for lakes in Norway show the values and classes that authority reports, with the season or year each was taken.

Lakes in Norway, 61 Named Lakes

Lake map

Map shows 61 lakes with coordinates

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Places in Norway

MjøsaPlace · 3 lakes
Northern NorwayRegion · 8 lakes
Southern NorwayRegion · 53 lakes

Named lakes

Lake	Place	Total phosphorus	Chlorophyll-a	Secchi	Year
Akersvannet	—	44 µg/L	16 µg/L	1.3 m	2023
Aremarksjoeen Lake	—	16 µg/L	6.0 µg/L	—	2023
Askjemvannet	—	18 µg/L	15 µg/L	2.5 m	2023
Atnsjoeen Lake	—	4.0 µg/L	1.5 µg/L	7.2 m	2022
Bergesvatnet	—	4.0 µg/L	1.8 µg/L	4.3 m	2020
Bjoerkelangen Lake	—	31 µg/L	4.7 µg/L	—	2023
Borrevannet	—	39 µg/L	16 µg/L	1.8 m	2023
Byglandsfjorden Lake	—	3.0 µg/L	1.4 µg/L	—	2021
Eikedalsvatnet	—	1.5 µg/L	0.90 µg/L	—	2021
Eikeren Lake	—	4.2 µg/L	1.3 µg/L	—	2023
Femsjoeen Lake	—	12 µg/L	2.3 µg/L	—	2023
Femunden Graaneset Lake	—	3.0 µg/L	0.80 µg/L	9.8 m	2023
Finnasvatnet	—	3.0 µg/L	1.3 µg/L	4.7 m	2020
Fjellgardsvatnet	—	3.0 µg/L	1.2 µg/L	7.8 m	2023
Geitvatnet	—	3.0 µg/L	0.80 µg/L	6.0 m	2020
Gjende Lake	—	7.0 µg/L	1.1 µg/L	4.3 m	2023
Gjennestadvannet	—	21 µg/L	7.1 µg/L	—	2023
Goksjoe Goksjoebukta Sydoest Lake	—	25 µg/L	21 µg/L	1.7 m	2023
Groroedvannet	—	7.0 µg/L	7.6 µg/L	4.1 m	2023
Hoeysjoeen Lake	—	8.0 µg/L	0.70 µg/L	2.7 m	2017
Hornindalsvatnet	—	2.0 µg/L	1.3 µg/L	—	2021
Isesjoen Ise	—	22 µg/L	8.6 µg/L	—	2023
Kapervatnet	—	2.0 µg/L	0.50 µg/L	13 m	2023
Leirbekkvatnet	—	2.0 µg/L	0.70 µg/L	9.5 m	2020
Lille Rostavatn	—	2.0 µg/L	0.60 µg/L	10 m	2020
Lundevatnet	—	3.0 µg/L	0.90 µg/L	—	2021
Mjavatn	—	3.0 µg/L	1.2 µg/L	5.2 m	2019
Mjoesa Broettum Lake	—	5.8 µg/L	1.2 µg/L	6.8 m	2023
Mjogsjoeen Lake	—	5.0 µg/L	0.80 µg/L	9.9 m	2021
Mjosa Lake	—	5.0 µg/L	2.0 µg/L	8.5 m	2023
Mjøsa Lake	—	4.6 µg/L	2.1 µg/L	9.0 m	2023
Moskanjavri Lake	—	4.0 µg/L	0.90 µg/L	9.3 m	2020
Mosvatnet Time	—	13 µg/L	3.6 µg/L	3.9 m	2020
Movatnet Eid	—	2.5 µg/L	0.80 µg/L	9.2 m	2019
Oegderen Lake	—	21 µg/L	7.3 µg/L	—	2023
Oerjeelva Ved Oerje Brug Lake	—	19 µg/L	—	—	2023
Olvatnet	—	8.5 µg/L	3.6 µg/L	5.4 m	2020
Ostre Bjonevatnet	—	3.0 µg/L	1.3 µg/L	4.4 m	2023
Ovre Drengsrudvann Lake	—	13 µg/L	6.3 µg/L	3.5 m	2021
Oyeren Lake	—	9.6 µg/L	3.0 µg/L	2.9 m	2022
Pasvikelva Lake	—	4.0 µg/L	—	—	2022
Randsfjorden Grymyr Lake	—	5.1 µg/L	1.8 µg/L	—	2023
Revovannet	—	39 µg/L	48 µg/L	0.9 m	2023
Roedenessjoeen Lake	—	17 µg/L	3.6 µg/L	—	2023
Sandnes-Langen Lake	—	3.5 µg/L	1.1 µg/L	6.7 m	2019
Selbusjoen	—	3.0 µg/L	1.2 µg/L	5.5 m	2023
Selsvatnet	—	24 µg/L	5.9 µg/L	2.9 m	2021
Sjusjoen	—	18 µg/L	4.6 µg/L	—	2023
Skardvatnet	—	2.3 µg/L	0.90 µg/L	7.3 m	2023
Skirfossen Lake	—	25 µg/L	—	—	2023
Skulerudsjoeen Lake	—	23 µg/L	5.1 µg/L	—	2023
Songsjoeen Lake	—	4.0 µg/L	1.2 µg/L	5.3 m	2023
Steinvatnet	—	2.0 µg/L	0.70 µg/L	15 m	2020
Storavatnet Meland	—	5.0 µg/L	2.0 µg/L	4.8 m	2020
Surtningen Lake	—	8.0 µg/L	1.7 µg/L	6.7 m	2021
Svartdalsvatnet	—	2.0 µg/L	0.90 µg/L	10 m	2023
Svartetjoerna Lake	—	2.0 µg/L	—	—	2018
Taarnvatnet	—	2.0 µg/L	0.70 µg/L	10 m	2022
Tunevannet Tun	—	29 µg/L	12 µg/L	—	2023
Tyrifjorden Holsfjorden Lake	—	4.0 µg/L	1.3 µg/L	5.0 m	2023
Vangsvatnet	—	3.0 µg/L	1.4 µg/L	—	2021

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Frequently asked questions

How is lake water quality measured in Norway?: 61 named lakes in Norway have official phosphorus, chlorophyll-a, and Secchi from the Norwegian Environment Agency, via UNEP GEMS/Water (OPEN GFQA), 2017–2023. These are the authority's own measurements, shown as reported.
Whose ratings do the Norway lake pages show?: The publishing authority's own. Pages for lakes in Norway show the values and classes that authority reports, with the season or year each was taken.