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.

In the first half of October 2025, the average daily temperature dropped significantly, and the heating season began accordingly, which was also detected by the Green Sentinel’s air quality measuring instruments. The sudden increase in the amount of airborne dust is the result of solid fuel burning by the population: wood, coal, lignite, and in the worst cases, waste.

Citizen science programmes continue, with NGOs in focus. This time, experts from the University of Debrecen and the HUN-REN Institute for Nuclear Research gave a presentation to NGOs at the measuring station of the Green Sentinel 14.

A running track is being built in the center of Józsa, on Klastrompart. The one-kilometer-long running track will cross the Tócó stream in two places. Here, among the trees, on the banks of the stream, it will be possible to exercise in a natural environment, where the Green Sentinel will also watch over joggers.

The Citizen Science program continues: this time, more than 300 students at three locations learned about the operation of the Green Watch. The children learned how data is collected, what measuring instruments the system uses, and how the environment is examined. The importance of biodiversity was illustrated in an interactive presentation.

The Green Sentinel senors reported a significant increase in PM10 and PM2.5 particulate matter concentrations on 11 June 2025 between 02:00 and 04:00 am, due to adverse meteorological effects.

The Green Sentinel has expanded with a new community initiative: the Citizen Science program has been launched! The goal is to give the residents of Debrecen a closer look at how environmental data collection works and even allow them to participate in it.

The European Commission has recognized Debrecen's commitment to environmental protection: our city has been named one of the ten best candidates for the European Green Capital Award 2027. This decision further reinforces the knowledge-based, green approach that characterizes Debrecen's development.

The Environmental Control System, one of the priority measures of Debrecen's Environmental Strategy, the Green Codex, has been implemented, and the details of its operation were presented at a scientific conference by the university researchers and experts involved in its development. This marked the launch of the Green Sentinel, a short tutorial video of which can be found on its website here.

The Environmental Monitoring System monitoring station network has been completed and a public site visit was held on 30 January 2025. The press tour, which was attended by the Mayor, included a presentation to the press of the first completed Józsa Klastrompart complex monitoring station.

One of the 50 measures outlined in Debrecen's environmental program, the Green Code, is the creation of an Environmental Monitoring System. This Green Watch is unique in the country: it is an automated information and data collection, analysis and monitoring system developed by experts, operated and supervised 24 hours a day, which continuously monitors our environment.