Skip to main content
LakeQuality

서호

South KoreaView mapDirections

NIER publishes the water-quality measurements for 서호. Here is what has been measured.

Clarity
0.6 m
Murkier than most
Secchi · sampled 2025
Phosphorus
97 µg/L
More phosphorus than most
Measured by NIER
Chlorophyll-a
59.9 µg/L
More algae than most
Measured by NIER
  • Limited data

서호 in South Korea has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 97 µg/L. Chlorophyll-a (algae): 59.9 µg/L.

Loading map…

How 서호 is classified

서호 in South Korea 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, phosphorus 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 National Institute of Environmental Research (Korea).

서호 is a lake in Unknown County, South Korea.

Source: the National Institute of Environmental Research (Korea) — not the EPA Water Quality Portal, last sampled 2025-12-15. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether 서호 is safe to swim in today is a call for the National Institute of Environmental Research (Korea) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for 서호 →

Water quality measurements for 서호

These are the measurements NIER publishes for 서호. More on the source.

Very murky, less than 2 ft of visibility. Phosphorus 97 µg/L. Chlorophyll-a 59.9 µg/L. TSI 69.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)0.6mMeasured, not scored

How deep a black-and-white disk stays visible from the surface. Higher is clearer.

Total phosphorus97µg/LMeasured, not scored

The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.

Chlorophyll-a (algae)59.9µg/LMeasured, not scored

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.69Eutrophic
OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about 서호

Answers come straight from the public measurements and survey records on this page.

Stays via Stay22

Stays near 서호

Compare lakeside cabins, hotels, and vacation rentals near 서호 in South Korea — 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 서호

Prices for Oct 9–11, 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 서호’s readings

Email me when new measurements post for this lake. Updates stay free.


Or email

Fishing 서호

Frequently asked questions about 서호

Where is 서호?

서호 is a lake in South Korea. This page reports official water-quality measurements, shown as reported.

What is the water quality of 서호?

서호 in South Korea has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 97 µg/L. Chlorophyll-a (algae): 59.9 µg/L.

Measurements on this page ↑

Is 서호 safe to swim in?

서호 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.

Swimming on this page ↑

Where this data comes from

845 measurements from 3 monitoring stations, 2016–2025. Retrieved from the listed programme (not the EPA Water Quality Portal). See data sources on 2026-08-20.

Collected and reported by

  • National Institute of Environmental Research (Korea)nier-kr845 samples · 2016–2025

Analytical methods

  • NIER national water-quality network (호소 surface chemistry)
Monitoring station identifiers (3)
  • 1101B30
  • 1101B35
  • 1101B40

Authority classifications are shown as the authority published them. See where the data comes from and data sources.