Where is Lille Rostavatn?

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

Is Lille Rostavatn safe to swim in?

Lille Rostavatn 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.

Lille Rostavatn

NorwayView map Directions

Miljødirektoratet publishes the water-quality measurements for Lille Rostavatn. Here is what has been measured.

Clarity

10.3 m

Clearer than most

Secchi · sampled 2020

Phosphorus

2 µg/L

Less phosphorus than most

Measured by Miljødirektoratet

Chlorophyll-a

0.6 µg/L

Less algae than most

Measured by Miljødirektoratet

Limited data

See the measurements Directions Where to stay

Lille Rostavatn in Norway has official water-quality measurements, shown as reported. Water clarity: 10.3 m visibility. Phosphorus: 2 µg/L. Chlorophyll-a (algae): 0.6 µg/L.

Loading map…

How Lille Rostavatn is classified

Lille Rostavatn 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).

Lille Rostavatn 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 2020-10-12. Methodology: how these readings are compared.

What Lille Rostavatn is good for

From access and monitoring records, not editorial picks.

Clear water33.6 ft of visibility

Swimming conditions

No reading

Limited data

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

Whether Lille Rostavatn 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.

Get alerts for Lille Rostavatn →

Water quality measurements for Lille Rostavatn

These are the measurements Miljødirektoratet publishes for Lille Rostavatn. More on the source.

Crystal clear, you can see 33.6 ft down. Phosphorus 2 µg/L. Chlorophyll-a 0.6 µg/L. TSI 22.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	10.25m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	2µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	0.6µg/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.	22	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Lille Rostavatn

Answers come straight from the public measurements and survey records on this page.

Stays via Stay22

Stays near Lille Rostavatn

Compare lakeside cabins, hotels, and vacation rentals near Lille Rostavatn in Norway — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Lille Rostavatn

Prices for Oct 2–4, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Follow Lille Rostavatn’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Lille Rostavatn

→ Lille Rostavatn fishing regulations (limits, seasons, special rules)

Frequently asked questions about Lille Rostavatn

Where is Lille Rostavatn?: Lille Rostavatn is a lake in Norway. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lille Rostavatn?: Lille Rostavatn in Norway has official water-quality measurements, shown as reported. Water clarity: 10.3 m visibility. Phosphorus: 2 µg/L. Chlorophyll-a (algae): 0.6 µg/L.
Is Lille Rostavatn safe to swim in?: Lille Rostavatn 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.

Explore Lille Rostavatn across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Norway

Lakes in Norway

Official water quality for lakes in Norway

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

40 measurements from 1 monitoring station, 2016–2020. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

European Environment Agencyeuropeanenvironmentagenc40 samples · —

Analytical methods

GEMStat OPEN / CC BY 4.0

Monitoring station identifiers (1)

NOR00215

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