渡之瀬ダム貯水池
Hiroshima, JapanView mapDirections
MOE publishes the water-quality measurements for 渡之瀬ダム貯水池. Here is what has been measured.
- Limited data
渡之瀬ダム貯水池 in Hiroshima, Japan has official water-quality measurements, shown as reported. Phosphorus: 16.5 µg/L.
How 渡之瀬ダム貯水池 is classified
渡之瀬ダム貯水池 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 phosphorus, but not water clarity and 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).
渡之瀬ダム貯水池 is a lake in Hiroshima County, Japan.
Source: the Ministry of the Environment (Japan) — not the EPA Water Quality Portal, last sampled 2021-07-01. 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 渡之瀬ダム貯水池 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 渡之瀬ダム貯水池
These are the measurements MOE publishes for 渡之瀬ダム貯水池. More on the source.
No clarity data. Phosphorus 16.5 µg/L. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 16.5µg/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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Frequently asked questions about 渡之瀬ダム貯水池
Where is 渡之瀬ダム貯水池?
- 渡之瀬ダム貯水池 is a lake in Hiroshima, Japan. This page reports official water-quality measurements, shown as reported.
What is the water quality of 渡之瀬ダム貯水池?
- 渡之瀬ダム貯水池 in Hiroshima, Japan has official water-quality measurements, shown as reported. Phosphorus: 16.5 µg/L.
Is 渡之瀬ダム貯水池 safe to swim in?
- 渡之瀬ダム貯水池 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
6 measurements from 1 monitoring station, 2016–2021. 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-jp6 samples · 2016–2021
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (1)
3420060
Authority classifications are shown as the authority published them. See where the data comes from and data sources.