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LakeQuality

Lake map

Map shows 4 lakes with coordinates

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Named lakes

LakePlaceTotal phosphorusChlorophyll-aSecchiYear
山中湖Yamanashi10 µg/L—4.4 m2025
本栖湖Yamanashi3.0 µg/L—14 m2025
河口湖Yamanashi12 µg/L—3.5 m2025
精進湖Yamanashi16 µg/L—2.8 m2025

Frequently asked questions

How many named lakes are in Yamanashi?
4 named lakes in Yamanashi, Japan, have official phosphorus and Secchi, 2025. Values are the authority's measurements, shown as reported.
Where do the Yamanashi readings come from?
Yamanashi pages show official phosphorus, chlorophyll-a, and Secchi from the publishing authority, with the year each was taken.

Official surface phosphorus, chlorophyll-a, and/or Secchi. Not a LakeQuality A–F grade — the authority does not publish a letter on this scale.