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MEASURING POINTS

Current Air Quality PM2.5

What is PM2.5

Instructions for Online Measurements

Measuring Points

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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.

WEATHER

Sunrise: 6:44

11:21

Sunset: 15:53

°C

Source HungaroMet Nonprofit Zrt.

Detailed Weather

Wind Direction

NEWS AND UPDATES

2025-10-27

PREPARING FOR THE ANNUAL CALIBRATION OF AIR QUALITY MEASURING INSTRUMENTS

2025-10-25

THE GREEN SENTINEL AT THE "JUST RABBIT" GASTRONOMY FESTIVAL

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.

2025-10-17

THE HEATING SEASON HAS BEGUN. LET'S PAY ATTENTION TO PROPER HEATING!

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.

2025-10-16

NGOs got to know the Green Sentinel!

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.

2025-08-26

Running track under construction in Józsa: service interruption at station 16

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.

2025-06-25

More than 300 students got to know the Green Sentinel

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.

2025-06-11

Dust concentration and meteorological background

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.

All news

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

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!

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OUR PARTNERS

CITY OF
DEBRECEN

UNIVERSITY OF
DEBRECEN

GREEN SENTINELDebrecen Environmental Control System

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