Where is Vähä Onkijärvi?

Vähä Onkijärvi is a lake in Orimattila, Finland. This page reports official water-quality measurements, shown as reported.

Is Vähä Onkijärvi safe to swim in?

Vähä Onkijärvi 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.

Vähä Onkijärvi

Orimattila, FinlandView map Directions

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

Phosphorus

14 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

6.4 µg/L

Typical for Finland

Measured by Syke

Limited data

See the measurements Directions Where to stay

Vähä Onkijärvi in Orimattila, Finland has official water-quality measurements, shown as reported. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 6.4 µg/L.

Loading map…

How Vähä Onkijärvi is classified

Vähä Onkijärvi 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 phosphorus and algae (chlorophyll-a), but not water clarity.

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.

Vähä Onkijärvi is a lake in Orimattila County, Finland.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-06-08. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

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

Whether Vähä Onkijärvi 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.

Get alerts for Vähä Onkijärvi →

Water quality measurements for Vähä Onkijärvi

These are the measurements Syke publishes for Vähä Onkijärvi. More on the source.

No clarity data. Phosphorus 14 µg/L. Chlorophyll-a 6.4 µg/L. TSI 46.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	14µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	6.4µg/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.	46	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Vähä Onkijärvi

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

Stays via Stay22

Stays near Vähä Onkijärvi

Compare lakeside cabins, hotels, and vacation rentals near Vähä Onkijärvi in Orimattila, Finland — 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 Vähä Onkijärvi

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 Vähä Onkijärvi’s readings

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

Or email

Fishing Vähä Onkijärvi

→ Vähä Onkijärvi fishing regulations (limits, seasons, special rules)

Frequently asked questions about Vähä Onkijärvi

Where is Vähä Onkijärvi?: Vähä Onkijärvi is a lake in Orimattila, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Vähä Onkijärvi?: Vähä Onkijärvi in Orimattila, Finland has official water-quality measurements, shown as reported. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 6.4 µg/L.
Is Vähä Onkijärvi safe to swim in?: Vähä Onkijärvi 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 Vähä Onkijärvi across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Finland

Lakes in Finland

Official water quality for lakes in Finland

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

2 measurements from 1 monitoring station, 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-vesla2 samples · 2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

98719

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