Rummu Järv
Rummu Järv in Harju, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 8.8 m visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 45.6 ft. Surface area: 216.7 acres.
- Clarity
- 8.8 m
- Max depth
- 13.9 m
- Area
- 88 ha
Why Rummu Järv has no A–F grade
Rummu 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).
Rummu Järv is a 217-acre lake in Harju County, Estonia with a maximum depth of 46 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-09-18. 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 Rummu Järv
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 28.7 ft down. Phosphorus level: 11 µg/L. Chlorophyll-a: 1 µg/L. Trophic State Index: 33.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.75 m | Not graded |
| Phosphorus | 11 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 33 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 13.9 m |
| Surface Area | 88 ha |
Where to stay near Rummu Järv
Compare lakeside cabins, hotels, and vacation rentals near Rummu Järv in Harju, 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 Rummu Järv
Frequently asked questions about Rummu Järv
What is the water quality of Rummu Järv?
- Rummu Järv in Harju, Estonia has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 8.8 m visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 45.6 ft. Surface area: 216.7 acres.
Is Rummu Järv safe to swim in?
- Rummu 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 Rummu Järv?
- Rummu Järv has a maximum depth of 45.6 feet. The lake covers 216.7 acres.
Explore Rummu Järv across LakeGrade
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Where this data comes from
12 measurements from 1 monitoring station, 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-ee12 samples · 2024
Analytical methods
- KESE I-level monitoring
Monitoring station identifiers (1)
SJA2964000
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: 2024-09-18
Monitoring stations: 1