七ケ宿ダム
Miyagi, JapanView mapDirections
MOE publishes the water-quality measurements for 七ケ宿ダム. Here is what has been measured.
- Limited data
七ケ宿ダム in Miyagi, Japan has official water-quality measurements, shown as reported. Water clarity: 3.2 m visibility. Phosphorus: 8 µg/L.
How 七ケ宿ダム is classified
七ケ宿ダム 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 water clarity and phosphorus, but not 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).
七ケ宿ダム is a lake in Miyagi County, Japan.
Source: the Ministry of the Environment (Japan) — not the EPA Water Quality Portal, last sampled 2025-03-15. Methodology: how these readings are compared.
What 七ケ宿ダム is good for
From access and monitoring records, not editorial picks.
- Clear water10.5 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether 七ケ宿ダム 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 七ケ宿ダム
These are the measurements MOE publishes for 七ケ宿ダム. More on the source.
Good clarity, visible to about 10.5 ft. Phosphorus 8 µg/L. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.2m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 8µg/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. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about 七ケ宿ダム
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near 七ケ宿ダム
Compare lakeside cabins, hotels, and vacation rentals near 七ケ宿ダム 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 七ケ宿ダム
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 七ケ宿ダム’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing 七ケ宿ダム
Frequently asked questions about 七ケ宿ダム
Where is 七ケ宿ダム?
- 七ケ宿ダム is a lake in Miyagi, Japan. This page reports official water-quality measurements, shown as reported.
What is the water quality of 七ケ宿ダム?
- 七ケ宿ダム in Miyagi, Japan has official water-quality measurements, shown as reported. Water clarity: 3.2 m visibility. Phosphorus: 8 µg/L.
Is 七ケ宿ダム safe to swim in?
- 七ケ宿ダム 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 七ケ宿ダム across LakeQuality
More lakes in Japan
Where this data comes from
45 measurements from 1 monitoring station, 2016–2025. 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-jp45 samples · 2016–2025
Analytical methods
- MOE public water body monitoring (kosui, lakes)
Monitoring station identifiers (1)
0420400
Authority classifications are shown as the authority published them. See where the data comes from and data sources.