CAQM Regulations 2026: What Delhi NCR Businesses Must Know About Air Quality Compliance

CAQM regulations in 2026 have shifted Delhi NCR air-quality compliance from seasonal firefighting to a year-round, legally binding obligation for every business. If your facility runs a boiler, a diesel generator, a construction site or a vehicle fleet, the Commission for Air Quality Management now sets fixed statutory deadlines you must meet — not just directions that surface when winter smog arrives. Here is what has changed in 2026 and exactly what your business must do.

Who Is CAQM and Why Its Orders Are Binding

The Commission for Air Quality Management in NCR and Adjoining Areas (CAQM) is a statutory body created under the CAQM Act, 2021. Its directions sit above State Pollution Control Boards, so a CAQM order overrides conflicting state instructions across Delhi and the NCR districts of Haryana, Uttar Pradesh and Rajasthan.

The teeth matter. Under Section 14 of the Act, non-compliance with a CAQM direction can attract imprisonment of up to five years, a fine of up to Rs 1 crore, or both. In 2026 the Commission has been issuing standalone statutory directions — not just seasonal advisories — which means the compliance clock now runs all year.

The Big One: Direction No. 98 and the 50 mg/Nm³ PM Standard

On 21 February 2026, CAQM issued Statutory Direction No. 98, prescribing a uniform particulate matter (PM) emission standard of 50 mg/Nm³ for identified industries across Delhi NCR. This is a significant tightening from the older, sector-specific limits many units still operate under.

The 50 mg/Nm³ limit applies to 17 categories of highly polluting industries identified by the Central Pollution Control Board (CPCB), red-category medium and large air-polluting industries, food and food-processing units running boilers or thermic fluid heaters, textile units with boilers, and metal industries with furnaces. The Commission based the standardon studies by IIT Kanpur and the recommendations of a CPCB Technical Committee, concluding that 50 mg/Nm³ is both technically achievable and environmentally necessary.

The deadlines you cannot miss

The compliance schedule is phased. Large and medium industries must comply with effect from 1 August 2026. All remaining industries must comply from 1 October 2026. With the first deadline days away, affected units should already be retrofitting air pollution control devices (APCDs) — upgraded bag filters or electrostatic precipitators — and installing or recalibrating online continuous emission monitoring systems (CEMS) linked to the CPCB and state board servers.

Fuel and DG Sets: PNG Switchover and the Dual-Fuel Rule

CAQM continues to enforce its fuel directions. Industries in the NCR outside the jurisdiction of the Government of NCT of Delhi were directed to switch completely to Piped Natural Gas (PNG) or approved biomass fuels, with the original deadline of 30 September 2022 now long past — units still on unapproved fuels are in open violation.

Diesel generator (DG) sets must run in dual-fuel mode wherever PNG infrastructure and supply are available. During GRAP restrictions, DG sets face tight limits — including a maximum of two hours of operation per day in some stages. Keep documented fuel-purchase and run-hour records; these are the first thing an inspecting team asks for.

GRAP 2026: Revised and Tighter

The Graded Response Action Plan (GRAP) was revised for the 2026 cycle, and the changes make earlier stages stricter. Several measures that previously appeared only in Stage IV have been pulled forward into Stage III — including allowing up to 50% of staff in government, private and municipal offices to work from home. In practice, restrictions now bite sooner as the AQI worsens.

GRAP stages track the Air Quality Index: Stage I (Poor, AQI 201–300), Stage II (Very Poor, 301–400), Stage III (Severe, 401–450) and Stage IV (Severe+, above 450). As stages escalate, expect bans on construction and demolition, restrictions on DG sets, curbs on truck entry into Delhi, and brick-kiln and hot-mix plant shutdowns. Through 2026 the Commission has repeatedly invoked and revoked stages within weeks as AQI moved — so a static plan is not enough.

Build a GRAP response SOP

Every NCR business should maintain a written GRAP standard operating procedure that maps each stage to specific site actions: switching fuels, pausing dusty activity, adjusting shifts, and deploying anti-smog measures. When a stage is invoked with immediate effect, you will not have time to plan from scratch.

End-of-Life Vehicle Fuel Ban Hits Fleets

For anyone running vehicles, the end-of-life vehicle (ELV) fuel ban is the most operationally disruptive CAQM measure. Diesel vehicles older than 10 years and petrol vehicles older than 15 years are denied fuel at NCR fuel stations. Enforcement uses Automatic Number Plate Recognition (ANPR) cameras — around 498 fuel stations in Delhi are equipped — that check plates against the VAHAN database in real time.

The rollout is phased: Delhi and five high vehicle-density districts (Gurugram, Faridabad, Ghaziabad, Gautam Budh Nagar and Sonipat) came under the ban first, with the rest of the NCR following from 1 April 2026. The rationale is stark — transport contributes roughly 28% of PM2.5, 41% of sulphur dioxide and 78% of nitrogen oxide emissions in the NCR. If your fleet includes ageing vehicles, audit registration dates now and plan replacement or relocation.

Enforcement Is Real — Not SymbolicCAQM has demonstrated that these are not paper rules. In 2026 the Commission issued closure directions to 16 industrial units in the NCR for gross violations. In April 2026 it imposed environmental compensation of roughly Rs 61.85 crore on six coal-based thermal power plants for breaching the statutory requirement to co-fire biomass with coal under the Environment (Utilisation of Crop Residue by Thermal Power Plants) Rules, 2023. The message for industry is clear: environmental compensation and closure are live risks, not remote ones.

Construction and Dust Compliance

Construction and demolition sites face continuous obligations regardless of GRAP stage: dust barriers, covered material storage, wheel-washing, water sprinkling, and anti-smog guns at larger sites. Projects above prescribed thresholds must register on the relevant state dust-monitoring portal and self-report. During Stage III and IV, most non-essential C&D activity halts entirely, so sequence critical work with the GRAP calendar in mind.

What This Means for Your Business

The 2026 CAQM framework rewards businesses that treat air-quality compliance as a standing operational discipline rather than a winter scramble. The 1 August and 1 October PM deadlines, the revised GRAP, the ELV fuel ban and a visibly active enforcement wing together raise the cost of getting caught unprepared. Testa & Tegmen helps NCR industries, developers and fleet operators map their obligations under Direction No. 98 and the wider CAQM regime, build defensible GRAP SOPs, and put the monitoring and documentation in place before an inspection — not after. Talk to our advisory team to run a CAQM readiness check for your facility this quarter.