Mjosa Lake
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Miljødirektoratet publishes the water-quality measurements for Mjosa Lake. Here is what has been measured.
- Limited data
Mjosa Lake in Norway has official water-quality measurements, shown as reported. Water clarity: 8.5 m visibility. Phosphorus: 5 µg/L. Chlorophyll-a (algae): 2 µg/L.
How Mjosa Lake is classified
Mjosa Lake in Norway is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the Norwegian Environment Agency, via UNEP GEMS/Water (OPEN GFQA).
Mjosa Lake is a lake in Unknown County, Norway.
Source: the Norwegian Environment Agency, via UNEP GEMS/Water (OPEN GFQA) — not the EPA Water Quality Portal, last sampled 2023-10-30. Methodology: how these readings are compared.
What Mjosa Lake is good for
From access and monitoring records, not editorial picks.
- Clear water27.9 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Mjosa Lake is safe to swim in today is a call for the Norwegian Environment Agency, via UNEP GEMS/Water (OPEN GFQA) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mjosa Lake
These are the measurements Miljødirektoratet publishes for Mjosa Lake. More on the source.
Crystal clear, you can see 27.9 ft down. Phosphorus 5 µg/L. Chlorophyll-a 2 µg/L. TSI 31.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8.5m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 31 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Answers come straight from the public measurements and survey records on this page.
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Fishing Mjosa Lake
Frequently asked questions about Mjosa Lake
Where is Mjosa Lake?
- Mjosa Lake is a lake in Norway. This page reports official water-quality measurements, shown as reported.
What is the water quality of Mjosa Lake?
- Mjosa Lake in Norway has official water-quality measurements, shown as reported. Water clarity: 8.5 m visibility. Phosphorus: 5 µg/L. Chlorophyll-a (algae): 2 µg/L.
Is Mjosa Lake safe to swim in?
- Mjosa Lake has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
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Where this data comes from
136 measurements from 2 monitoring stations, 2016–2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc136 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (2)
NOR00050NOR00051
Authority classifications are shown as the authority published them. See where the data comes from and data sources.