Official annual classification
ACHTERDIEKSEE
2025: SufficientNot a live safety signal. This is an annual official classification. Temporary pollution, algae, weather, currents or closures may change current conditions. Check the competent authority before swimming.
Quality history
Historical annual classifications from the EEA record, where available.
2025Sufficient
2024Poor
2023Sufficient
2022Poor
2021Sufficient
2020Good
2019Good
2018Excellent
2017Excellent
2016Excellent
2015Excellent
History summary
4 of 11 classified seasons in the 2015–2025 record are Excellent; the previous classified season (2024) was Poor.
Nearby official bathing waters
Closest records in Germany by straight-line distance. This is not road distance or a live safety ranking.
BULTENSEE
Lake · Good3.1 kmROTTKUHLE ARBERGEN
Lake · Excellent4.7 kmMAHNDORFER SEE
Lake · Excellent5.8 kmWESER
River · Excellent6.3 kmSTADTWALDSEE
Lake · Excellent6.3 km
Lake · Good3.1 kmROTTKUHLE ARBERGEN
Lake · Excellent4.7 kmMAHNDORFER SEE
Lake · Excellent5.8 kmWESER
River · Excellent6.3 kmSTADTWALDSEE
Lake · Excellent6.3 km
Official source
Data source: European Environment Agency (EEA); bathing-water data and coordinates are reported by national authorities. Imported for this site on 2026-09-14.
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