Where is Hormajärvi?

Hormajärvi is a lake in Lohja, Finland. This page reports official water-quality measurements, shown as reported.

Is Hormajärvi safe to swim in?

Hormajärvi 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 Hormajärvi?

Hormajärvi has a maximum depth of 68.9 feet.

Hormajärvi

Lohja, FinlandView map Directions

Syke publishes the water-quality measurements for Hormajärvi. Here is what has been measured.

Clarity

3.5 m

Clearer than most

Secchi · sampled 2026

Phosphorus

13 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

2.9 µg/L

Less algae than most

Measured by Syke

Max depth

21 m

Bathymetric survey

69 ft max depth
Limited data

See the measurements Directions Where to stay

Hormajärvi in Lohja, Finland has official water-quality measurements, shown as reported. Water clarity: 3.5 m visibility. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 2.9 µg/L. Maximum depth: 68.9 ft.

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How Hormajärvi is classified

Hormajärvi in Finland 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 Finnish Environment Institute (Syke) and the ELY Centres.

Hormajärvi is a lake in Lohja County, Finland with a maximum depth of 69 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-07-22. Methodology: how these readings are compared.

What Hormajärvi is good for

From access and monitoring records, not editorial picks.

Clear water11.5 ft of visibility
Deep water68.9 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 Hormajärvi is safe to swim in today is a call for the Finnish Environment Institute (Syke) and the ELY Centres and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Hormajärvi

These are the measurements Syke publishes for Hormajärvi. More on the source.

Good clarity, visible to about 11.5 ft. Phosphorus 13 µg/L. Chlorophyll-a 2.9 µg/L. TSI 41.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	3.5m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	13µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	2.9µg/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.	41	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Hormajärvi

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

Lake Details

Max depth

21 m

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Stays near Hormajärvi

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Fishing Hormajärvi

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

Frequently asked questions about Hormajärvi

Where is Hormajärvi?: Hormajärvi is a lake in Lohja, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Hormajärvi?: Hormajärvi in Lohja, Finland has official water-quality measurements, shown as reported. Water clarity: 3.5 m visibility. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 2.9 µg/L. Maximum depth: 68.9 ft.
Is Hormajärvi safe to swim in?: Hormajärvi 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 Hormajärvi?: Hormajärvi has a maximum depth of 68.9 feet.

Explore Hormajärvi 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

196 measurements from 2 monitoring stations, 2016–2026. Retrieved from Syke VESLA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

Finnish Environment Institute (Syke) and ELY Centressyke-vesla196 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (2)

1196
1195

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