Rotter See Troisdorf

Germany Lake 1 - Excellent

Rotter-See is an artificial lake in Troisdorf formed from a former gravel pit filled with groundwater. The bathing area covers approximately 200 metres of shoreline. The lake has no inflows and is well protected against erosion by vegetation. Water temperatures range from 13.9°C to 25.1°C with an average of 20.6°C, and transparency is consistently 2 metres.

Reviews

No reviews yet.

Write a review

Photos

Upload a photo

Water

Artificial lake formed from a former gravel pit. Surface area approximately 25 hectares. Catchment area approximately 30 hectares. Average depth not specified; maximum depth approximately 10 metres. Water level fluctuations dependent on groundwater level. Elevation approximately 55 metres above sea level. Substrate geology: Rhenish Middle Terrace.

Location

Troisdorf, North Rhine-Westphalia, Germany. Operated by the City of Troisdorf, Environmental and Climate Protection Office, Kölner Straße 176, 53840 Troisdorf. Toilet facilities are accessible on foot. Parking information is not specified.

Facilities

Toilet facilities accessible on foot. No lifeguards. Disabled access not specified. Beach flags not mentioned. Showers not mentioned.

Season

Official monitoring season not specified. Designated bathing water since at least 1992.

Water Quality

Water quality classification: excellent for 2019–2021, good for 2022. pH values range from 8.0 to 8.8 (mean 8.3). No identified pollution sources. No cyanobacterial blooms observed in the past four years. No risk of future cyanobacterial or phytoplankton mass development. In 2009, a single incident of elevated E. coli and Enterococcus values occurred briefly during extreme summer heat with very high bathing frequency; no recurrence documented.