伊豆沼
Miyagi, JapanView mapDirections
MOE publishes the water-quality measurements for 伊豆沼. Here is what has been measured.
- Limited data
伊豆沼 in Miyagi, Japan has official water-quality measurements, shown as reported. Phosphorus: 98 µg/L.
How 伊豆沼 is classified
伊豆沼 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 phosphorus, but not water clarity and 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).
伊豆沼 is a lake in Miyagi County, Japan.
Source: the Ministry of the Environment (Japan) — not the EPA Water Quality Portal, last sampled 2024-07-01. 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 伊豆沼 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 伊豆沼
These are the measurements MOE publishes for 伊豆沼. More on the source.
No clarity data. Phosphorus 98 µg/L. TSI 70.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 98µg/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. | 70 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about 伊豆沼
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near 伊豆沼
Compare lakeside cabins, hotels, and vacation rentals near 伊豆沼 in Miyagi, Japan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near 伊豆沼
Prices for Oct 2–4, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow 伊豆沼’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing 伊豆沼
Frequently asked questions about 伊豆沼
Where is 伊豆沼?
- 伊豆沼 is a lake in Miyagi, Japan. This page reports official water-quality measurements, shown as reported.
What is the water quality of 伊豆沼?
- 伊豆沼 in Miyagi, Japan has official water-quality measurements, shown as reported. Phosphorus: 98 µg/L.
Is 伊豆沼 safe to swim in?
- 伊豆沼 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 伊豆沼 across LakeQuality
More lakes in Japan
Where this data comes from
27 measurements from 3 monitoring stations, 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-jp27 samples · 2016–2024
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (3)
042022004203800420410
Authority classifications are shown as the authority published them. See where the data comes from and data sources.