The Commission for Air Quality Management (CAQM) has reiterated its hard stance against polluting diesel generator (DG) sets across the National Capital Region (NCR), warning that non-compliant units will not be allowed to operate — even for essential services.
As per an order issued earlier, CAQM had directed that all eligible diesel generators be retrofitted with approved emission-control devices or dual-fuel systems by September 30, 2023. Failure to comply would result in a blanket prohibition on their operation anywhere in NCR, regardless of whether the Graded Response Action Plan (GRAP) is in force.
Rules Apply Even Outside Emergency Pollution Phases
The commission clarified that DG sets above 19 kilowatts are permitted to run only if they are retrofitted with emission-reduction technologies. This requirement applies at all times and is not limited to high-pollution episodes or emergency restrictions.
“Diesel generators cannot be treated as an exception to pollution control norms. Compliance is mandatory,” CAQM officials stated, underlining that environmental safeguards are non-negotiable.
PNG Availability Weakens Justification for Diesel Dependence
In its order, CAQM pointed out that most residential, commercial and industrial pockets in NCR already have access to piped natural gas (PNG) infrastructure. Even in areas where pipeline connectivity is not immediately feasible, gas availability through cascades and cylinders offers a practical alternative.
“Cleaner fuel options are widely accessible. Continued reliance on diesel generators is no longer justified,” the commission noted.
Certification and Cost Concerns Acknowledged
CAQM acknowledged industry concerns regarding the high cost of retrofitting, particularly for smaller generator sets where the expense can be nearly equal to purchasing a new DG unit.
At present, certified retrofit emission control devices (RECDs) are available for generators in the 125–500 kW range, while certification for 500–800 kW units is expected soon. Authorities have assured that the certification process is being expedited to remove compliance bottlenecks.
Gurgaon Remains a Hotspot for DG Usage
Despite the regulatory push, diesel generators continue to be heavily used in Gurgaon, primarily due to frequent localised power outages and sanctioned electricity loads falling short of actual demand.
In many residential townships, high-rise condominiums and commercial complexes, generators automatically kick in during peak load periods, often becoming a routine power source rather than an emergency backup. This repeated use leads to mechanical stress, breakdowns, and persistent
