Ontamojärvi
Pudasjärvi, FinlandView mapDirections
Syke publishes the water-quality measurements for Ontamojärvi. Here is what has been measured.
- 5 ft max depth
- Limited data
Ontamojärvi in Pudasjärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.9 m visibility. Phosphorus: 28.5 µg/L. Chlorophyll-a (algae): 9.6 µg/L. Maximum depth: 5.2 ft.
How Ontamojärvi is classified
Ontamojärvi 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.
Ontamojärvi is a lake in Pudasjärvi County, Finland with a maximum depth of 5 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2023-09-19. 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 Ontamojärvi 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 Ontamojärvi
These are the measurements Syke publishes for Ontamojärvi. More on the source.
Very murky, less than 2.8 ft of visibility. Phosphorus 28.5 µg/L. Chlorophyll-a 9.6 µg/L. TSI 56.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.85m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 28.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 9.6µg/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. | 56 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ontamojärvi
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
1.6 m
Stays via Stay22
Stays near Ontamojärvi
Compare lakeside cabins, hotels, and vacation rentals near Ontamojärvi in Pudasjärvi, 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 Ontamojärvi
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 Ontamojärvi’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Ontamojärvi
Frequently asked questions about Ontamojärvi
Where is Ontamojärvi?
- Ontamojärvi is a lake in Pudasjärvi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Ontamojärvi?
- Ontamojärvi in Pudasjärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.9 m visibility. Phosphorus: 28.5 µg/L. Chlorophyll-a (algae): 9.6 µg/L. Maximum depth: 5.2 ft.
Is Ontamojärvi safe to swim in?
- Ontamojärvi 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 Ontamojärvi?
- Ontamojärvi has a maximum depth of 5.2 feet.
Explore Ontamojärvi across LakeQuality
More lakes in Finland
Where this data comes from
11 measurements from 1 monitoring station, 2023. 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-vesla11 samples · 2023
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
30750
Authority classifications are shown as the authority published them. See where the data comes from and data sources.