空素沼
空素沼 in Akita, Japan has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Phosphorus: 26 µg/L.
- Clarity
- 1.5 m
Why 空素沼 has no A–F grade
空素沼 in Japan 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 and phosphorus, but not 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 Ministry of the Environment (Japan).
空素沼 is a lake in Akita County, Japan.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-10-15. 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 空素沼
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 4.9 ft. Phosphorus level: 26 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 m | Not graded |
| Phosphorus | 26 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near 空素沼
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Fishing 空素沼
Frequently asked questions about 空素沼
What is the water quality of 空素沼?
- 空素沼 in Akita, Japan has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Phosphorus: 26 µg/L.
Is 空素沼 safe to swim in?
- 空素沼 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.
Explore 空素沼 across LakeGrade
More lakes in Japan
Where this data comes from
21 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-jp21 samples · 2016–2024
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (1)
0520700
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: 2024-10-15
Monitoring stations: 1