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LakeQuality

Lake map

Map shows 2 lakes with coordinates

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Named lakes

LakePlaceTotal phosphorusChlorophyll-aSecchiYear
牛久沼Ibaraki79 µg/L—0.5 m2025
霞ヶ浦Ibaraki85 µg/L—0.7 m2025

Frequently asked questions

How many named lakes are in Ibaraki?
2 named lakes in Ibaraki, Japan, have official phosphorus and Secchi, 2025. Values are the authority's measurements, shown as reported.
Where do the Ibaraki readings come from?
Ibaraki 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.