A chlorine gas leak from a 900-kg cylinder at a water treatment plant in Nagpur's Godhani village shortly after midnight on 23 August 2026 sent residents fleeing and left dozens hospitalised, with the National Disaster Response Force (NDRF) and fire crews working until dawn to neutralise the cylinder thehindubusinessline.com deccanchronicle.com rediff.com. The single reported incident dominated the day's water-treatment news.
Key takeaways
- Chlorine gas leaked from a 900-kg cylinder at the Godhani water treatment plant in Nagpur at around 1 am on 23 August 2026 thehindubusinessline.com.
- More than 40 locals fell ill with coughing and breathing difficulties, with several taken to Sparsh Hospital in Zingabai Takli and Mayo Hospital deccanchronicle.com.
- Police evacuated residents within a 200-metre radius and cordoned off the area rediff.com.
- The leak was plugged by about 5.30 am, when the cylinder was submerged in a caustic soda solution thehindubusinessline.com.
System Failures, Spills & Outages
Chlorine cylinder leak at Godhani WTP, Nagpur
A 900-kg capacity chlorine gas cylinder leaked at the Maharashtra Jeevan Pradhikaran's Godhani Municipal Council Water Treatment Plant at around 1 am on Monday, with the gas spreading to nearby residential areas and triggering panic, the Nagpur Municipal Corporation (NMC) said thehindubusinessline.com deccanchronicle.com. Many residents developed cough and breathing difficulties, and more than 40 people fell ill, with affected residents taken to Sparsh Hospital in Zingabai Takli and Mayo Hospital deccanchronicle.com.
Local police and administrative officials evacuated residents within a 200-metre radius and cordoned off the area, with an official at Mankapur police station stating that "security personnel evacuated residents within a 200-metre radius to safe locations and cordoned off the area," and that "many people went to hospitals on their own, while many others were hospitalised by the police" rediff.com. The Nagpur Municipal Corporation Fire Department dispatched two water tenders with breathing apparatus, while staff of Orange City Water Pvt Ltd (OCW), which supplies drinking water in Nagpur, and an NDRF team were called in thehindubusinessline.com.
By about 5.30 am the leak was plugged, and the NDRF team, firefighters and OCW personnel placed the chlorine cylinder into a tank of water mixed with caustic soda to neutralise the gas, the civic body said thehindubusinessline.com deccanchronicle.com.
Specification read — Godhani WTP chlorine incident
A single 900-kg chlorine cylinder is the bulk-supply size typically used to dose finished water at municipal works in the 50–200 MLD range (50,000–200,000 m³/day, roughly 250,000 to 1,000,000 population equivalent); a release from one cylinder is what triggers a 200-m evacuation radius and a multi-agency response, which lines up with what was reported at Godhani. The plant's relevant treatment stage is post-clarification disinfection, where gaseous Cl₂ is dosed through vacuum regulators and an emergency scrubber, normally sodium hydroxide (caustic soda) solution, to absorb any leaked gas. Caustic soda neutralisation is the standard response because Cl₂ + 2NaOH → NaCl + NaOCl + H₂O converts toxic chlorine into a salt + bleach solution that can be held safely in the dosing bund; the on-site caustic tank size is what determines how long the response team can keep the cylinder submerged until the leak is fully drawn down. The recognition sentence is this: if your plant runs a 50–200 MLD surface-water or clearwater works, stores 900-kg chlorine cylinders on site, and depends on a single vacuum chlorinator train, the gap that produced the Godhani incident is the absence of a dedicated scrubber loop sized to your full cylinder inventory plus redundancy on the regulator and nitrogen-purge line — that is the engineering scope a buyer should be pricing now. Municipal drinking-water works handling finished-water chlorination are exactly the municipal segment this incident belongs to.
FAQ
What size plant would normally store a 900-kg chlorine cylinder?
A 900-kg cylinder is standard bulk supply for municipal drinking-water works in the 50–200 MLD range (50,000–200,000 m³/day), and is also common at large industrial WTPs treating process water or cooling-tower make-up above roughly 20,000 m³/day deccanchronicle.com.
How is a leaking chlorine cylinder neutralised at a water plant?
Standard practice is to submerge the leaking cylinder in a tank of water mixed with caustic soda (NaOH), which converts chlorine to salt and sodium hypochlorite — the method used at Godhani by NDRF, fire crews and OCW personnel by 5.30 am thehindubusinessline.com.
What is the typical evacuation radius for a 900-kg chlorine cylinder leak?
The 200-metre evacuation and cordoning radius reported at Godhani is in line with the initial isolation distance used for a single bulk chlorine cylinder release at a water treatment plant rediff.com.
How much caustic soda is needed to neutralise a 900-kg chlorine cylinder?
As a general engineering range, neutralising 900 kg of Cl₂ requires roughly 1,240 kg of NaOH at stoichiometric ratio, with plant scrubbers typically sized at 1.5–2× that figure to provide margin; this is a general sizing range, not a reported figure from the incident.
