Hitdorfer See

Germany Lake 1 - Excellent

Hitdorfer See is an artificial lake located in Leverkusen, Germany. The bathing water has been classified as excellent for four consecutive years (2022–2025). The lake covers 9.5 hectares with a sandy and gravelly substrate and has been designated as an EU bathing water since 2009. The beach or shoreline extends for 250 metres.

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Water

Artificial lake covering 9.5 hectares. Average water depth is 10 metres with a maximum depth of 18 metres. Water temperature ranges from 13.0 to 26.6°C with an average of 19.8°C. pH ranges from 7.40 to 9.18 with an average of 8.29. Conductivity ranges from 326 to 455 µS·cm⁻¹ with an average of 390.5 µS·cm⁻¹. Transparency ranges from 1.5 to 4.5 metres with an average of 3.0 metres. Water exchange time exceeds 30 days. Water level fluctuations reach 4 metres.

Location

Hitdorfer See is located in Leverkusen, Germany. A parking area is available, with occasional charges. A kiosk and toilets are present on-site.

Facilities

Kiosk, toilets, parking area (occasionally charged).

Water Quality

Water quality classification: excellent (2022, 2023, 2024, 2025). No relevant pollution sources have been identified. Occasional bird presence causes minor fluctuations in water quality, particularly regarding microbial counts.

Risks

Occasional bird presence causes minor fluctuations in water quality, particularly regarding microbial counts. Macralgae, including filamentous algae, present in minor amounts. No cyanobacteria blooms observed in the past four years and no risk of future cyanobacteria mass development.