皆瀬ダム
Akita, JapanView mapDirections
MOE publishes the water-quality measurements for 皆瀬ダム. Here is what has been measured.
- Limited data
皆瀬ダム in Akita, Japan has official water-quality measurements, shown as reported. Water clarity: 1.7 m visibility. Phosphorus: 16 µg/L.
How 皆瀬ダム is classified
皆瀬ダム in Japan 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 and phosphorus, but not algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the Ministry of the Environment (Japan).
皆瀬ダム is a lake in Akita County, Japan.
Source: the Ministry of the Environment (Japan) — not the EPA Water Quality Portal, last sampled 2024-08-15. 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 皆瀬ダム is safe to swim in today is a call for the Ministry of the Environment (Japan) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for 皆瀬ダム
These are the measurements MOE publishes for 皆瀬ダム. More on the source.
Murky, only visible to about 5.4 ft. Phosphorus 16 µg/L. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.65m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 16µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Frequently asked questions about 皆瀬ダム
Where is 皆瀬ダム?
- 皆瀬ダム is a lake in Akita, Japan. This page reports official water-quality measurements, shown as reported.
What is the water quality of 皆瀬ダム?
- 皆瀬ダム in Akita, Japan has official water-quality measurements, shown as reported. Water clarity: 1.7 m visibility. Phosphorus: 16 µg/L.
Is 皆瀬ダム safe to swim in?
- 皆瀬ダム 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.
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Where this data comes from
17 measurements from 1 monitoring station, 2016–2024. Retrieved from Japan MOE public water-body monitoring (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Ministry of the Environment (Japan)
moe-jp17 samples · 2016–2024
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (1)
0520530
Authority classifications are shown as the authority published them. See where the data comes from and data sources.