The extreme heat, with temperatures persistently exceeding 40°C, places an exceptional strain on our devices located outdoors in direct sunlight, particularly the AQMesh air quality monitors. Temporary data gaps may occur in the gas sensor measurements of these devices. The measurement results are expected to become available again once temperatures decrease, likely after 20:00.

Due to planned electrical maintenance by OPUS TITÁSZ Zrt., the power supply in the vicinity of the KER04 monitoring station (Southern Economic Zone, at the intersection of Highways No. 481 and No. 47) will be interrupted on 28 July 2026, from 08:00 to 16:00. During the power outage, the monitoring instruments will not transmit data to the website.

As part of the professional programme of their 79th Annual Field Meeting, members of the Hungarian Geographical Society visited the monitoring station at the Vezér Street Reservoir on 5 July 2026, where they learned about the operation of Green Sentinel, the Debrecen Environmental Monitoring System.

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Maintenance work on the measuring containers of the Green Sentinel monitoring stations has begun. During the maintenance period, the air quality measuring instruments will be dismantled to ensure their protection. No data will be provided on the website during this time.

The implementation of a new gas protocol for the air quality monitoring instruments of Green Sentinel is currently underway. The English manufacturer of our air quality monitoring devices is developing and applying this new gas protocol to improve the accuracy of the instruments. The process itself takes place over several weeks and is expected to be completed in week 18.

The experts of the Green Sentinel Air Working Group demonstrate the impact of the heating season on air quality, the physical sampling methods required for this, and the specialized laboratory analyses. In addition, the meteorologist of the Air Working Group introduces the meteorological phenomena that influence air quality.

The experts and professors of Green Sentinel continuously monitor Debrecen’s air quality through both online and physical sampling. We present the sampling, laboratory, and scientific work of the HUN-REN Institute for Nuclear Research and the Institute of Applied Chemistry at the University of Debrecen, along with their state-of-the-art instrumentation and the scientific evaluation of the...

According to the forecasts of HungaroMet Nonprofit Zrt., temperatures may drop below -18°C in the coming days; therefore, in order to protect the integrity of the probes and sensors, it is necessary to remove the equipment from the surface water monitoring stations.

The annual calibration and intercomparison of our air quality measuring instruments has started, which we are carrying out simultaneously with the final two-week measurement of the baseline air quality monitoring.

The continuous maintenance of the operation and technical condition of the Green Sentinel, the Debrecen Environmental Control System, the maintenance and calibration of the measuring instruments is of utmost importance for accurate and reliable measurements, data collection and information.

On 25.10.2025, at 11 am, the preparations for the cooking competition started on the Klastrompart in Józsa for this year's "Just Rabbit" gastronomic festival. Fires were lit under the stoves, which were immediately detected by the air quality sensors at the Green Sentinels's monitoring station in Yorsa.