Hjartsjon is a lake in Sweden. This page reports official water-quality measurements, shown as reported.

Is Hjartsjon safe to swim in?

Hjartsjon 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.

Hjartsjon

SwedenView map Directions

HaV publishes the water-quality measurements for Hjartsjon. Here is what has been measured.

Clarity

5.6 m

Clearer than most

Secchi · sampled 2023

Phosphorus

5.3 µg/L

Less phosphorus than most

Measured by HaV

Chlorophyll-a

1.3 µg/L

Less algae than most

Measured by HaV

Limited data

See the measurements Directions Where to stay

Hjartsjon in Sweden has official water-quality measurements, shown as reported. Water clarity: 5.6 m visibility. Phosphorus: 5.3 µg/L. Chlorophyll-a (algae): 1.3 µg/L.

Loading map…

How Hjartsjon is classified

Hjartsjon in Sweden 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 Swedish Agency for Marine and Water Management, via UNEP GEMS/Water.

Hjartsjon is a lake in Unknown County, Sweden.

Source: the Swedish Agency for Marine and Water Management, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-10-10. Methodology: how these readings are compared.

What Hjartsjon is good for

From access and monitoring records, not editorial picks.

Clear water18.4 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 Hjartsjon is safe to swim in today is a call for the Swedish Agency for Marine and Water Management, via UNEP GEMS/Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Hjartsjon →

Water quality measurements for Hjartsjon

These are the measurements HaV publishes for Hjartsjon. More on the source.

Crystal clear, you can see 18.4 ft down. Phosphorus 5.3 µg/L. Chlorophyll-a 1.3 µg/L. TSI 32.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	5.6m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	5.3µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1.3µg/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.	32	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Hjartsjon

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

Stays via Stay22

Stays near Hjartsjon

Compare lakeside cabins, hotels, and vacation rentals near Hjartsjon in Sweden — 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 Hjartsjon

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 Hjartsjon’s readings

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

Or email

Fishing Hjartsjon

→ Hjartsjon fishing regulations (limits, seasons, special rules)

Frequently asked questions about Hjartsjon

Where is Hjartsjon?: Hjartsjon is a lake in Sweden. This page reports official water-quality measurements, shown as reported.
What is the water quality of Hjartsjon?: Hjartsjon in Sweden has official water-quality measurements, shown as reported. Water clarity: 5.6 m visibility. Phosphorus: 5.3 µg/L. Chlorophyll-a (algae): 1.3 µg/L.
Is Hjartsjon safe to swim in?: Hjartsjon 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 Hjartsjon across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Sweden

Lakes in Sweden

Official water quality for lakes in Sweden

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

81 measurements from 1 monitoring station, 2016–2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

European Environment Agencyeuropeanenvironmentagenc81 samples · —

Analytical methods

GEMStat OPEN / CC BY 4.0

Monitoring station identifiers (1)

SWE00162

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