Four Dead from Toxic Gas in Chittagong Septic Tanks

Four people have tragically lost their lives after inhaling toxic gas in two separate septic tank incidents across the Chittagong district. The fatal accidents occurred within a span of less than two hours on Friday afternoon, prompting fresh concerns over safety standards in confined-space maintenance.

The First Tragedy in Raozan

The first incident took place at around 12:30 pm in the Jhikuti Para area of Noapara Union, located within the Raozan Upazila. Two men died whilst working on a septic tank at an under-construction residence owned by a local individual known as Dr Ratan.

The victims have been identified as Pradip Das, a resident of the Kachukhain area in Raozan, and Samiran Das, from the Kadurkhil area of Boalkhali. Local sources confirmed that Pradip was the son-in-law of the property owner.

According to residents and local authorities, Pradip initially entered the septic tank, which had remained tightly sealed for a prolonged period during the building’s construction phase. Upon entering, he was immediately overcome by a dense accumulation of poisonous gases and lost consciousness. Seeing him collapse, Samiran courageously descended into the tank to rescue him but was also quickly incapacitated by the lethal fumes.

Upon receiving emergency calls, teams from the Bangladesh Fire Service and Civil Defence rushed to the scene to conduct a rescue operation. Officers extracted both men in an unconscious state and transported them to a nearby hospital, where attending doctors pronounced them dead on arrival. Jashim Uddin, the Officer-in-Charge (OC) of Raozan Police Station, confirmed the details of the incident and stated that an investigation into the matter is underway.

Fatal Suburb Incident Follows

Barely two hours later, at approximately 2:00 pm, a remarkably similar tragedy unfolded within Chittagong city itself. Two more workers died whilst cleaning a septic tank at the Lucky Mansion building in the Dhaniwala Para residential area.

One of the deceased has been identified as Shakib, whilst the identity of his co-worker remains unconfirmed. Fire service personnel reported that the pair had entered the subterranean tank to perform routine cleaning operations without adequate safety equipment. They were suffocated by a sudden buildup of toxic emissions, likely a combination of methane and carbon monoxide. Their bodies were later recovered and sent to the Chittagong Medical College Hospital morgue for post-mortem examinations.

A Persistent Safety Challenge

These twin accidents highlight a recurring and deadly issue in urban and rural infrastructure maintenance across the country. Sealed septic tanks, underground sewers, and deep wells naturally accumulate hazardous gases such as hydrogen sulphide, methane, carbon dioxide, and carbon monoxide whilst depleting vital oxygen levels.

Fire safety experts emphasise that entering these confined spaces without proper ventilation or specialised breathing apparatus is highly perilous. Standard safety protocols dictate that such chambers should be left open for at least several hours prior to entry, and tested with basic techniques—such as lowering a lit candle or utilising gas detectors—to ensure the air is safe. Regrettably, a lack of awareness and a shortage of protective equipment amongst local labourers continue to lead to preventable loss of life.