Tochigi, Japan
County page for 6 named lakes in Japan. Official surface phosphorus, chlorophyll-a, and Secchi — not a swim-safety class and not a LakeQuality letter.
Lake map
Loading map…
Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| 中禅寺湖 | Tochigi | 5.0 µg/L | — | 7.8 m | 2024 |
| 川俣ダム貯水池 | Tochigi | 7.0 µg/L | — | 6.1 m | 2025 |
| 川治ダム貯水池 | Tochigi | 8.0 µg/L | — | 4.5 m | 2025 |
| 深山ダム貯水池 | Tochigi | 4.0 µg/L | — | 7.3 m | 2024 |
| 渡良瀬貯水池 | Tochigi | 100 µg/L | — | 0.6 m | 2025 |
| 湯の湖 | Tochigi | 14 µg/L | — | 3.1 m | 2024 |
Where to stay near Tochigi, Japan
Lakeside cabins, hotels, and vacation rentals near Tochigi, Japan — live availability from Booking.com, Vrbo and Expedia.
Top-rated places to stay near Tochigi, Japan
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Tochigi, Japan?
Get lake water-quality report cards plus the best cabin & lodging deals near Tochigi, Japan — straight to your inbox. No spam, unsubscribe anytime.