Green algae: beware of invisible dangers (H2S)
On June 24, 2025, the State was ordered to compensate the family of a jogger who lost his life in Hillion (Côtes-d’Armor) in 2016, likely due to hydrogen sulfide (H₂S) poisoning an extremely toxic gas released by the decomposition of green algae.
This tragedy, far from isolated, sheds light on an invisible but deadly danger that GazDetect addresses with practical solutions.
This article is primarily intended for companies and local authorities operating near areas at risk of toxic gas emissions linked to green algae.
GazDetect: Your safety partner against toxic gases
At GazDetect, we offer a full range of portable gas detectors specially designed to prevent H₂S poisoning.
Recommended Portable Detectors:
- Ventis MX4 Portable 4 Gas Detector: A very robust, shockproof device resistant to water and dust (IP66 and IP67) and guaranteed for 4 years
- TANGO TX2 Gas Detector: Features three types of alarms visual (LED), audible (100 dB), and vibrating ensuring effective alerts in case of danger.
We also offer a range of respiratory protective equipment suited for such operations, ensuring optimal safety alongside detection.
Why Equip Your Staff with GazDetect?
Immediate Safety: H₂S is lethal at 500 ppm, but our detectors alert you starting at 5 ppm.
Regulatory Compliance: In green algae zones, the Regional Health Agency (ARS) recommends installing H₂S sensors (health component of PLAV 2022-2027), and authorities (prefectures, DREETS) require the use of respiratory protection and suitable detectors during cleanup operations.
Legal Protection: In case of an accident, proving you anticipated risks with calibrated, traceable equipment can make all the difference.
Comprehensive Service: Our free app, MyGazDetect, ensures monitoring, maintenance, and certification.
With GazDetect, you invest in safety, prevention, and peace of mind.
Need advice? Our experts are here to help you.