Where is Viljandi Järv?

Viljandi Järv is a lake in Viljandi, Estonia. This page reports official water-quality measurements, shown as reported.

Is Viljandi Järv safe to swim in?

Viljandi Järv 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.

How deep is Viljandi Järv?

Viljandi Järv has a maximum depth of 38.1 feet. The lake covers 396.1 acres.

Viljandi Järv

Viljandi, Estonia160 haView map Directions

KAUR publishes the water-quality measurements for Viljandi Järv. Here is what has been measured.

Clarity

2.2 m

Clearer than most

Secchi · sampled 2023

Phosphorus

32 µg/L

Typical for Estonia

Measured by KAUR

Chlorophyll-a

11 µg/L

Typical for Estonia

Measured by KAUR

Max depth

11.6 m

Bathymetric survey

Area

160 ha

Surface area

38 ft max depth
Limited data

See the measurements Directions Where to stay

Viljandi Järv in Viljandi, Estonia has official water-quality measurements, shown as reported. Water clarity: 2.2 m visibility. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 11 µg/L. Maximum depth: 38.1 ft. Surface area: 396.1 acres.

Loading map…

How Viljandi Järv is classified

Viljandi Järv in Estonia 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 Estonian Environment Agency (Keskkonnaagentuur).

Viljandi Järv is a 396-acre lake in Viljandi County, Estonia with a maximum depth of 38 feet.

Source: the Estonian Environment Agency (Keskkonnaagentuur) — not the EPA Water Quality Portal, last sampled 2023-09-12. Methodology: how these readings are compared.

What Viljandi Järv is good for

From access and monitoring records, not editorial picks.

Deep water38.1 ft surveyed max depth

Swimming conditions

No reading

Limited data

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

Whether Viljandi Järv is safe to swim in today is a call for the Estonian Environment Agency (Keskkonnaagentuur) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Viljandi Järv →

Water quality measurements for Viljandi Järv

These are the measurements KAUR publishes for Viljandi Järv. More on the source.

Moderate clarity, visible to about 7.2 ft. Phosphorus 32 µg/L. Chlorophyll-a 11 µg/L. TSI 52.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	2.2m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	32µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	11µg/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.	52	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Viljandi Järv

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

Lake Details

Max depth

11.6 m

Surface area

160 ha

Stays via Stay22

Stays near Viljandi Järv

Compare lakeside cabins, hotels, and vacation rentals near Viljandi Järv in Viljandi, Estonia — 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 Viljandi Järv

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 Viljandi Järv’s readings

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

Or email

Fishing Viljandi Järv

→ Viljandi Järv fishing regulations (limits, seasons, special rules)

Frequently asked questions about Viljandi Järv

Where is Viljandi Järv?: Viljandi Järv is a lake in Viljandi, Estonia. This page reports official water-quality measurements, shown as reported.
What is the water quality of Viljandi Järv?: Viljandi Järv in Viljandi, Estonia has official water-quality measurements, shown as reported. Water clarity: 2.2 m visibility. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 11 µg/L. Maximum depth: 38.1 ft. Surface area: 396.1 acres.
Is Viljandi Järv safe to swim in?: Viljandi Järv 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.
How deep is Viljandi Järv?: Viljandi Järv has a maximum depth of 38.1 feet. The lake covers 396.1 acres.

Explore Viljandi Järv across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Estonia

Lakes in Estonia

Official water quality for lakes in Estonia

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

42 measurements from 2 monitoring stations, 2019–2023. Retrieved from KESE / Estonian Environment Agency (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

Estonian Environment Agency (Keskkonnaagentuur)kese-ee42 samples · 2019–2023

Analytical methods

KESE I-level monitoring

Monitoring station identifiers (2)

SJA9126000
SJA9126005

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