Sinijärv is a lake in Lääne-Viru, Estonia. This page reports official water-quality measurements, shown as reported.

Is Sinijärv safe to swim in?

Sinijärv 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 Sinijärv?

Sinijärv has a maximum depth of 21 feet. The lake covers 4.7 acres.

Sinijärv

Lääne-Viru, Estonia2 haView map Directions

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

Clarity

6.3 m

Clearer than most

Secchi · sampled 2024

Phosphorus

10 µg/L

Less phosphorus than most

Measured by KAUR

Chlorophyll-a

1 µg/L

Less algae than most

Measured by KAUR

Max depth

6.4 m

Bathymetric survey

Area

2 ha

Surface area

21 ft max depth
Limited data

See the measurements Directions Where to stay

Sinijärv in Lääne-Viru, Estonia has official water-quality measurements, shown as reported. Water clarity: 6.3 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 21 ft. Surface area: 4.7 acres.

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How Sinijärv is classified

Sinijärv 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).

Sinijärv is a 5-acre lake in Lääne-Viru County, Estonia with a maximum depth of 21 feet.

Source: the Estonian Environment Agency (Keskkonnaagentuur) — not the EPA Water Quality Portal, last sampled 2024-09-10. Methodology: how these readings are compared.

What Sinijärv is good for

From access and monitoring records, not editorial picks.

Clear water20.5 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 Sinijärv 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.

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Water quality measurements for Sinijärv

These are the measurements KAUR publishes for Sinijärv. More on the source.

Crystal clear, you can see 20.5 ft down. Phosphorus 10 µg/L. Chlorophyll-a 1 µg/L. TSI 34.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	6.25m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	10µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1µg/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.	34	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Sinijärv

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

Lake Details

Max depth

6.4 m

Surface area

2 ha

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Stays near Sinijärv

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Fishing Sinijärv

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

Frequently asked questions about Sinijärv

Where is Sinijärv?: Sinijärv is a lake in Lääne-Viru, Estonia. This page reports official water-quality measurements, shown as reported.
What is the water quality of Sinijärv?: Sinijärv in Lääne-Viru, Estonia has official water-quality measurements, shown as reported. Water clarity: 6.3 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 21 ft. Surface area: 4.7 acres.
Is Sinijärv safe to swim in?: Sinijärv 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 Sinijärv?: Sinijärv has a maximum depth of 21 feet. The lake covers 4.7 acres.

Explore Sinijärv across LakeQuality

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Species activity outlook by water temperature and season

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EU bathing ratings and named-lake measurements

Where this data comes from

106 measurements from 2 monitoring stations, 2016–2024. 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-ee106 samples · 2016–2024

Analytical methods

KESE I-level monitoring

Monitoring station identifiers (2)

SJA7186000
SJA7186002

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