Freizeitzentrum Varenholz Stemmer See

Germany Lake 1 - Excellent

Freizeitzentrum Varenholz is an artificial recreational lake located in the Lippe district of North Rhine-Westphalia, Germany. The bathing water has been classified as excellent for four consecutive years (2020–2023). The lake covers 25 hectares with a sandy substrate and naturally structured shoreline. Water exchange occurs through groundwater circulation with an exchange time exceeding 30 days.

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Water

Artificial lake covering 25 hectares with a catchment area of 10–100 km². Mean depth 2.9 metres, maximum depth 6.8 metres. Water temperature ranges from 15.4 °C to 22 °C with a mean of 19.6 °C. pH values range from 8.4 to 8.6 with a mean of 8.5. Water transparency ranges from 1.1 to 5 metres with a mean of 2.6 metres. The lake is mesotrophic. Water level fluctuations are 0.1 metre. Substrate composition is sandy.

Location

Located in Kalletal, North Rhine-Westphalia, at Varenholzer Straße, 32689 Kalletal. The nearest town is Lemgo. The beach and shore section extends 400 metres.

Water Quality

Bathing water quality rated as excellent for 2020, 2021, 2022, and 2023. No relevant pollution sources identified in the catchment area. No microbiological or chemical contamination in sediments detected. The water body has been designated as a bathing water under EU regulations since 1986.

Risks

No observed cyanobacterial blooms within the past four years. No danger of future cyanobacterial mass development identified. No danger of future macroalgal or phytoplankton mass development identified. No cercariae (duck flea causing swimmer's itch) detected.