Petäjärvi
Kirkkonummi, FinlandView mapDirections
Syke publishes the water-quality measurements for Petäjärvi. Here is what has been measured.
- 12 ft max depth
- Limited data
Petäjärvi in Kirkkonummi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.4 m visibility. Phosphorus: 100 µg/L. Chlorophyll-a (algae): 83 µg/L. Maximum depth: 12.1 ft.
How Petäjärvi is classified
Petäjärvi 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.
Petäjärvi is a lake in Kirkkonummi County, Finland with a maximum depth of 12 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2024-09-12. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Petäjärvi 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.
Water quality measurements for Petäjärvi
These are the measurements Syke publishes for Petäjärvi. More on the source.
Very murky, less than 1.3 ft of visibility. Phosphorus 100 µg/L. Chlorophyll-a 83 µg/L. TSI 73.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.4m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 100µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 83µg/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. | 73 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Petäjärvi
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
3.7 m
Stays via Stay22
Stays near Petäjärvi
Compare lakeside cabins, hotels, and vacation rentals near Petäjärvi in Kirkkonummi, 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 Petäjärvi
Prices for Oct 9–11, 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 Petäjärvi’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Petäjärvi
Frequently asked questions about Petäjärvi
Where is Petäjärvi?
- Petäjärvi is a lake in Kirkkonummi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Petäjärvi?
- Petäjärvi in Kirkkonummi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.4 m visibility. Phosphorus: 100 µg/L. Chlorophyll-a (algae): 83 µg/L. Maximum depth: 12.1 ft.
Is Petäjärvi safe to swim in?
- Petäjärvi 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 Petäjärvi?
- Petäjärvi has a maximum depth of 12.1 feet.
Explore Petäjärvi across LakeQuality
More lakes in Finland
Where this data comes from
91 measurements from 2 monitoring stations, 2016–2024. Retrieved from Syke VESLA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Finnish Environment Institute (Syke) and ELY Centres
syke-vesla91 samples · 2016–2024
Analytical methods
- SYKE VESLA
Monitoring station identifiers (2)
5383269611
Authority classifications are shown as the authority published them. See where the data comes from and data sources.