Dam Ogosta is a lake in Bulgaria. This page reports official water-quality measurements, shown as reported.

Is Dam Ogosta safe to swim in?

Dam Ogosta 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.

Dam Ogosta

BulgariaView map Directions

ExEA publishes the water-quality measurements for Dam Ogosta. Here is what has been measured.

Clarity

3.4 m

Secchi · sampled 2023

Phosphorus

53 µg/L

Measured by ExEA

Chlorophyll-a

10.8 µg/L

Measured by ExEA

Limited data

See the measurements Directions Where to stay

Dam Ogosta in Bulgaria has official water-quality measurements, shown as reported. Water clarity: 3.4 m visibility. Phosphorus: 53 µg/L. Chlorophyll-a (algae): 10.8 µg/L.

Loading map…

How Dam Ogosta is classified

Dam Ogosta in Bulgaria 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 Executive Environment Agency of Bulgaria, via UNEP GEMS/Water.

Dam Ogosta is a lake in Unknown County, Bulgaria.

Source: the Executive Environment Agency of Bulgaria, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-10-09. Methodology: how these readings are compared.

What Dam Ogosta is good for

From access and monitoring records, not editorial picks.

Clear water11 ft of visibility

Swimming conditions

No reading

Limited data

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

Whether Dam Ogosta is safe to swim in today is a call for the Executive Environment Agency of Bulgaria, via UNEP GEMS/Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Dam Ogosta →

Water quality measurements for Dam Ogosta

These are the measurements ExEA publishes for Dam Ogosta. More on the source.

Good clarity, visible to about 11 ft. Phosphorus 53 µg/L. Chlorophyll-a 10.8 µg/L. TSI 53.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	3.35m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	53µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	10.8µg/L	Measured, 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.	53	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Dam Ogosta

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

Stays via Stay22

Stays near Dam Ogosta

Compare lakeside cabins, hotels, and vacation rentals near Dam Ogosta in Bulgaria — 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 Dam Ogosta

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 Dam Ogosta’s readings

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

Or email

Fishing Dam Ogosta

→ Dam Ogosta fishing regulations (limits, seasons, special rules)

Frequently asked questions about Dam Ogosta

Where is Dam Ogosta?: Dam Ogosta is a lake in Bulgaria. This page reports official water-quality measurements, shown as reported.
What is the water quality of Dam Ogosta?: Dam Ogosta in Bulgaria has official water-quality measurements, shown as reported. Water clarity: 3.4 m visibility. Phosphorus: 53 µg/L. Chlorophyll-a (algae): 10.8 µg/L.
Is Dam Ogosta safe to swim in?: Dam Ogosta 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 Dam Ogosta across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Bulgaria

Lakes in Bulgaria

Official water quality for lakes in Bulgaria

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

29 measurements from 1 monitoring station, 2016–2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

European Environment Agencyeuropeanenvironmentagenc29 samples · —

Analytical methods

GEMStat OPEN / CC BY 4.0

Monitoring station identifiers (1)

BGR00023

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