Sinijärv
Sinijärv in Lääne-Viru, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 6.3 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 21 ft. Surface area: 4.7 acres.
- Clarity
- 6.3 m
- Max depth
- 6.4 m
- Area
- 2 ha
Why Sinijärv has no A–F grade
Sinijärv in Estonia 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 Estonian Environment Agency (Keskkonnaagentuur).
Sinijärv is a 5-acre lake in Lääne-Viru County, Estonia with a maximum depth of 21 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-09-10. 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 Sinijärv
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 20.5 ft down. Phosphorus level: 10 µg/L. Chlorophyll-a: 1 µg/L. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.25 m | Not graded |
| Phosphorus | 10 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 6.4 m |
| Surface Area | 2 ha |
Where to stay near Sinijärv
Compare lakeside cabins, hotels, and vacation rentals near Sinijärv in Lääne-Viru, Estonia — 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 Sinijärv
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Fishing Sinijärv
Frequently asked questions about Sinijärv
What is the water quality of Sinijärv?
- Sinijärv in Lääne-Viru, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 6.3 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 21 ft. Surface area: 4.7 acres.
Is Sinijärv safe to swim in?
- Sinijärv 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 Sinijärv?
- Sinijärv has a maximum depth of 21 feet. The lake covers 4.7 acres.
Explore Sinijärv across LakeGrade
More lakes in Estonia
Where this data comes from
106 measurements from 2 monitoring stations, 2016–2024. Retrieved from KESE / Estonian Environment Agency (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Estonian Environment Agency (Keskkonnaagentuur)
kese-ee106 samples · 2016–2024
Analytical methods
- KESE I-level monitoring
Monitoring station identifiers (2)
SJA7186000SJA7186002
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: 2024-09-10
Monitoring stations: 2