Kooru Järv
Kooru Järv in Saare, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.8 m visibility. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 1.5 µg/L. Maximum depth: 4.6 ft. Surface area: 215.5 acres.
- Clarity
- 0.8 m
- Max depth
- 1.4 m
- Area
- 87 ha
Why Kooru Järv has no A–F grade
Kooru Järv 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).
Kooru Järv is a 216-acre lake in Saare County, Estonia with a maximum depth of 5 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-09-16. 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 Kooru Järv
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2.6 ft of visibility. Phosphorus level: 15 µg/L. Chlorophyll-a: 1.5 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.8 m | Not graded |
| Phosphorus | 15 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1.5 µg/L | Not graded |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 1.4 m |
| Surface Area | 87 ha |
Where to stay near Kooru Järv
Compare lakeside cabins, hotels, and vacation rentals near Kooru Järv in Saare, 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.
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Fishing Kooru Järv
Frequently asked questions about Kooru Järv
What is the water quality of Kooru Järv?
- Kooru Järv in Saare, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.8 m visibility. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 1.5 µg/L. Maximum depth: 4.6 ft. Surface area: 215.5 acres.
Is Kooru Järv safe to swim in?
- Kooru Järv 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 Kooru Järv?
- Kooru Järv has a maximum depth of 4.6 feet. The lake covers 215.5 acres.
Explore Kooru Järv across LakeGrade
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Where this data comes from
128 measurements from 2 monitoring stations, 2016–2025. 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-ee128 samples · 2016–2025
Analytical methods
- KESE I-level monitoring
Monitoring station identifiers (2)
SJA0836000SJA0836003
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: 2025-09-16
Monitoring stations: 2