Freilinger See Badestrand

Germany Lake 1 - Excellent

Freilinger See is a bathing beach located on a reservoir in Germany. The bathing area spans 263 metres of shoreline. Water temperatures range from 12.6°C to 21.2°C with an average of 16.9°C. The water body has been classified as excellent for the past four consecutive years (2020–2023). The lake is eutrophic with a water exchange time exceeding 30 days.

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Water

Reservoir (Talsperre). Surface area: 110 hectares. Catchment area: 10–100 km². Mean depth: 3 metres, maximum depth: 10 metres. Water level fluctuations: 1–2 metres. Substrate composition: sandy with silt and clay. Water body is stratified. Water exchange time exceeds 30 days. Altitude: above 200 metres above sea level.

Location

The bathing area is located at Freilinger See near Blankenheim in the Kreis Euskirchen district. The sampling point coordinates are E: 338092 N: 5587526 (UTM). The operator is Gemeinde Blankenheim, Rathaus, Rathausplatz 16, 53945 Blankenheim.

Water Quality

Classification: excellent (2020, 2021, 2022, 2023). Water transparency ranges from 1 to 2 metres. pH values range from 7.3 to 8.9 with a mean of 8.1. Eutrophication level: eutroph I (moderate nutrient enrichment). The lake is classified as significantly modified. During summer months, slightly elevated eutrophication may occur due to the small catchment area and associated inflow.

Risks

Cyanobacteria: no water blooms observed within the past four years; future mass development risk assessed as low. Macroalgae (filamentous algae): risk assessed as low. Phytoplankton: future mass development risk assessed as low. Cercariae (duck itch) are not documented.