# Lake Velence water quality monitoring

> Live situation record from CLSTR: https://clstr.news/situations/lake-velence-water-quality-monitoring
> Updated: 2026-09-29T08:58:35.000Z. Sources: 6. Developments: 2.

Authorities in Hungary, specifically the National Water Directorate and the Central Transdanubian Water Directorate, have deployed an automated monitoring buoy in Lake Velence to address deteriorating water quality. The measure follows extreme hydrological and climatic conditions, including severe drought and heatwaves, which have caused dropping water levels.

These conditions have resulted in highly concentrated water, increased salinity, higher turbidity, and significant algae blooms, such as picoalgae and high chlorophyll-a concentrations, particularly in the eastern basin. 

The buoy, which was relocated from the Maconkai reservoir to the Lake Velence bathing area, conducts measurements every 15 minutes. It tracks parameters including water temperature, oxygen levels, salinity, pH, turbidity, and electrical conductivity. Data is transmitted to a central online database every 30 minutes to allow experts to detect rapid changes and facilitate timely interventions.

## Timeline

### 2026-09-29: Lake Velence receives automated buoy for water quality monitoring

An automated buoy has been deployed in Lake Velence, Hungary, to monitor water quality every 15 minutes following environmental degradation caused by low water levels and high salinity.

2 sources. https://clstr.news/cluster/lake-velence-receives-automated-buoy-for-water-quality-monitoring

### 2026-09-26: Lake Velence monitoring buoy deployed to track critical water quality

Authorities have deployed an automated buoy in Hungary's Lake Velence to monitor critical water quality changes, including rising salinity and algae blooms caused by extreme drought.

4 sources. https://clstr.news/cluster/lake-velence-monitoring-buoy-deployed-to-track-critical-water-quality

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Cite as: Lake Velence water quality monitoring. CLSTR, https://clstr.news/situations/lake-velence-water-quality-monitoring