One Community
news
2026-05-06
MONITORING STATION CONTAINER MAINTENANCE
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.
WEATHER
Sunrise: 5:03
12:11
Sunset: 19:56
Weather icon
°C
Source HungaroMet Nonprofit Zrt.
Detailed Weather

Wind Direction

NEWS AND UPDATES
news
2026-05-06
MONITORING STATION CONTAINER MAINTENANCE
news
2026-04-21
IMPLEMENTATION OF A NEW GAS PROTOCOL FOR OUR AIR QUALITY MONITORING INSTRUMENTS
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.
More
news
2026-03-04
TRACES OF THE HEATING SEASON AND URBAN AIR QUALITY
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.
More
news
2026-03-04
How We Measure Debrecen’s Air – Sampling and Instruments
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...
More
news
2026-01-08
Temporary Shutdown of Surface Water Monitoring Stations Due to Extreme Cold
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.
More
news
2025-12-05
The annual calibration of the air quality measuring instruments has started.
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.
More
news
2025-10-27
Preparing for the annual calibration of air quality measuring instruments
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.
More
description1
GLOSSARY
ENVIRONMENTAL ELEMENT
Land, air, water, wildlife and the man-made (built) environment and their components.
HEALTH LIMIT VALUE
The maximum permissible concentration of a substance (e.g. pollutant, chemical, noise) in the environment or a given medium (e.g. air, water, food, workplace environment) that does not cause long-term health effects to humans. Hungarian legislation sets both short-term (hourly or daily) and long-term (annual) air pollution levels. Long-term levels are more stringent than short-term levels because long-term exposure to pollutants can cause serious health effects.
INFORMATION THRESHOLD
The concentration of pollutants above which the local authority is obliged to inform the public of the current air quality status. This value is lower than the alert threshold and does not necessarily justify more stringent action, but it does provide a warning that air quality is no longer ideal. The information and alert thresholds for nitrogen dioxide, particulate matter, sulphur dioxide, carbon monoxide and ozone, which form the basis for the different stages and measures of the smog alert, are set out in Annex 3 to VM Decree No 4/2011 (I. 14.) on air pollution level limits and emission limit values for stationary sources of air pollution (hereinafter: VM Decree). The Mayor is authorised to order and lift the stages of the smog alert on the basis of the Smog Alert Plan. The requirements for the preparation of the smog alert plan are set out in Government Decree 306/2010 (XII. 23.) on air protection. The National Air Pollution Monitoring Network is responsible for monitoring air pollution levels and compliance with air pollution limit values in Hungary in order to assess national air pollution.
All concepts
description1
My Green Sentinel
SCIENCE IS AT YOUR SERVICE!
Scientists and professors from the University of Debrecen and the City of Debrecen have jointly created the Green Sentinel, which monitors the environmental condition of your living environment.

The Green Sentinel, or Environmental Control System, consists of 16 complex monitoring stations and 2 surface water monitoring points, selected by experts to cover the whole city, including residential areas, forested areas and industrial sites.

Select the closest monitoring point to you on the map to find out about the status and trends in air, water, soil, noise and biodiversity!

Green Sentinel is a complex monitoring system that provides you with data 24 hours a day, 7 days a week. Designed by experts, it is a continuous information and data collection, analysis and monitoring system based on objective measurements, using instrumental observation and continuous sampling to monitor changes and conditions in air, surface and groundwater, soil and wildlife.

The development, safety and well-being of Debrecen is our common cause, so we want you to be part of the Green Sentinel! Join our Citizen Science programmes to learn more about how the system works, how our scientists research, measure results and what and how it affects your environment.

Join us, let's do something together for Debrecen!
Details
OUR PARTNERS
Picture of the author
CITY OF
DEBRECEN
Picture of the author
Picture of the author
UNIVERSITY OF
DEBRECEN
GREEN SENTINELDebrecen Environmental Control System
© 2025 GREEN SENTINEL All rights reserved!