Keski-Tiilijärvi
Keski-Tiilijärvi in Hollola, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.3 m visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 4.4 µg/L. Maximum depth: 39.4 ft.
- Clarity
- 3.3 m
- Max depth
- 12 m
Why Keski-Tiilijärvi has no A–F grade
Keski-Tiilijärvi in Finland is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the Finnish Environment Institute (Syke) and the ELY Centres.
Keski-Tiilijärvi is a lake in Hollola County, Finland with a maximum depth of 39 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Keski-Tiilijärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10.8 ft. Phosphorus level: 14 µg/L. Chlorophyll-a: 4.4 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 m | Not graded |
| Phosphorus | 14 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4.4 µg/L | Not graded |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 m |
Where to stay near Keski-Tiilijärvi
Compare lakeside cabins, hotels, and vacation rentals near Keski-Tiilijärvi in Hollola, 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.
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Fishing Keski-Tiilijärvi
Frequently asked questions about Keski-Tiilijärvi
What is the water quality of Keski-Tiilijärvi?
- Keski-Tiilijärvi in Hollola, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.3 m visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 4.4 µg/L. Maximum depth: 39.4 ft.
Is Keski-Tiilijärvi safe to swim in?
- Keski-Tiilijärvi 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 Keski-Tiilijärvi?
- Keski-Tiilijärvi has a maximum depth of 39.4 feet.
Explore Keski-Tiilijärvi across LakeGrade
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Where this data comes from
23 measurements from 1 monitoring station, 2017–2025. 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-vesla23 samples · 2017–2025
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
83184
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2025-08-12
Monitoring stations: 1