宍道湖
Shimane, JapanView mapDirections
MOE publishes the water-quality measurements for 宍道湖. Here is what has been measured.
- Limited data
宍道湖 in Shimane, Japan has official water-quality measurements, shown as reported. Water clarity: 1.5 m visibility. Phosphorus: 44.5 µg/L.
How 宍道湖 is classified
宍道湖 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).
宍道湖 is a lake in Shimane County, Japan.
Source: the Ministry of the Environment (Japan) — not the EPA Water Quality Portal, last sampled 2025-03-15. 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 宍道湖 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 宍道湖
These are the measurements MOE publishes for 宍道湖. More on the source.
Murky, only visible to about 4.9 ft. Phosphorus 44.5 µg/L. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.5m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 44.5µg/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. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about 宍道湖
Where is 宍道湖?
- 宍道湖 is a lake in Shimane, Japan. This page reports official water-quality measurements, shown as reported.
What is the water quality of 宍道湖?
- 宍道湖 in Shimane, Japan has official water-quality measurements, shown as reported. Water clarity: 1.5 m visibility. Phosphorus: 44.5 µg/L.
Is 宍道湖 safe to swim in?
- 宍道湖 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
362 measurements from 8 monitoring stations, 2016–2025. 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-jp362 samples · 2016–2025
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (8)
32202203220230322024032202503220260322027032203303220340
Authority classifications are shown as the authority published them. See where the data comes from and data sources.