Where is Byglandsfjorden Lake?

Byglandsfjorden Lake is a lake in Norway. This page reports official water-quality measurements, shown as reported.

Is Byglandsfjorden Lake safe to swim in?

Byglandsfjorden 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.

Byglandsfjorden Lake

NorwayView map Directions

Miljødirektoratet publishes the water-quality measurements for Byglandsfjorden Lake. Here is what has been measured.

Phosphorus

3 µg/L

Typical for Norway

Measured by Miljødirektoratet

Chlorophyll-a

1.4 µg/L

Typical for Norway

Measured by Miljødirektoratet

Limited data

See the measurements Directions Where to stay

Byglandsfjorden Lake in Norway has official water-quality measurements, shown as reported. Phosphorus: 3 µg/L. Chlorophyll-a (algae): 1.4 µg/L.

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How Byglandsfjorden Lake is classified

Byglandsfjorden 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 phosphorus and algae (chlorophyll-a), but not water clarity.

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).

Byglandsfjorden 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 2021-10-05. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Byglandsfjorden 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.

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Water quality measurements for Byglandsfjorden Lake

These are the measurements Miljødirektoratet publishes for Byglandsfjorden Lake. More on the source.

No clarity data. Phosphorus 3 µg/L. Chlorophyll-a 1.4 µg/L. TSI 27.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	3µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1.4µg/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.	27	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

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Fishing Byglandsfjorden Lake

→ Byglandsfjorden Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Byglandsfjorden Lake

Where is Byglandsfjorden Lake?: Byglandsfjorden Lake is a lake in Norway. This page reports official water-quality measurements, shown as reported.
What is the water quality of Byglandsfjorden Lake?: Byglandsfjorden Lake in Norway has official water-quality measurements, shown as reported. Phosphorus: 3 µg/L. Chlorophyll-a (algae): 1.4 µg/L.
Is Byglandsfjorden Lake safe to swim in?: Byglandsfjorden 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

24 measurements from 1 monitoring station, 2017–2021. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

European Environment Agencyeuropeanenvironmentagenc24 samples · —

Analytical methods

GEMStat OPEN / CC BY 4.0

Monitoring station identifiers (1)

NOR00080

Authority classifications are shown as the authority published them. See where the data comes from and data sources.