AERMOD Air Dispersion Modelling in Mumbai, Pune & Maharashtra
AERMOD studies for real estate EC in MMR and Pune, MIDC chemical units in Taloja, Tarapur and Mahad, and power and industry in Chandrapur, Nashik and Chhatrapati Sambhajinagar, delivered remotely from Indore.
AERMOD Studies for Mumbai, Pune and Maharashtra
Maharashtra generates a very large volume of air quality work, from building and township projects across the Mumbai Metropolitan Region (MMR) and Pune to chemical units in MIDC estates along the Konkan coast and power, coal and cement projects in Vidarbha. Each brings its own modelling questions. In Mumbai the issues are coastal winds, dense receptors and DG sets in tall buildings; in Taloja or Tarapur it is cumulative impact in a crowded estate; in Pune and the Konkan it is terrain from the Western Ghats.
Air quality is also a live public issue in the state. Mumbai, Pune, Nagpur and several other Maharashtra cities are listed under the National Clean Air Programme (NCAP), and winter pollution episodes in Mumbai have led to closer attention to construction sites, DG sets and industrial stacks. Appraisal committees therefore read the air quality chapter of a Maharashtra application carefully, and a clear, well-documented AERMOD study helps avoid repeat queries and delays.
DSTechnoverse prepares regulatory AERMOD air dispersion modelling studies for Maharashtra projects needing environmental clearance, Consent to Establish, Consent to Operate, expansion approvals and stack height justification. We work remotely from Indore for developers, industries and EIA consultancies, using data shared online and review meetings by video call.
MPCB Consent, SEIAA Maharashtra and Modelling Requirements
Consents under the Air and Water Acts in Maharashtra are issued by the Maharashtra Pollution Control Board (MPCB) through its online consent management system, with sub-regional and regional offices handling applications and larger cases decided at headquarters. Category A projects are appraised by the Expert Appraisal Committee of the MoEFCC, and category B projects by the State Level Environment Impact Assessment Authority (SEIAA) Maharashtra on the recommendation of the State Expert Appraisal Committee (SEAC).
AERMOD studies usually enter through the EIA Terms of Reference, which ask for incremental ground level concentrations of PM10, PM2.5, SO2 and NOx and any process pollutants. At consent stage the requirement depends on the unit: larger red category industries, expansions in polluted areas and stack height cases often need modelling, while many smaller units do not. Requirements differ between regional offices and over time, so we suggest confirming the exact need with the concerned MPCB office before scoping.
Real Estate EC in MMR and Pune: DG Sets and Construction Dust
Building construction is the largest single source of EC applications in Maharashtra, driven by redevelopment and new towers in Mumbai, Thane, Navi Mumbai and the wider MMR, and by residential, IT park and township projects in Pune, Pimpri-Chinchwad and Hinjewadi. Under the EIA Notification 2006, item 8(a) covers building and construction projects of 20,000 to 1,50,000 m² built-up area, and item 8(b) covers township and area development projects of 50 ha or 1,50,000 m² and above. These are appraised by SEIAA Maharashtra.
The main modelled sources are standby DG sets during operation and dust from excavation, demolition and material handling during construction. Tall residential towers create building downwash and elevated receptors, so we check DG stack heights against CPCB requirements and the building itself, and run BPIP downwash where needed. Construction dust has become a sensitive topic in Mumbai, where air quality in recent winters has drawn the attention of the courts and the municipal corporation, so committees look closely at the dust mitigation plan alongside the model results. Our guide for construction and real estate projects explains the process for developers.
MIDC Chemical Areas We Model: Taloja, Tarapur, TTC, Mahad and Lote Parshuram
Most of Maharashtra's chemical, pharmaceutical and dye industry sits in MIDC estates, and each has its own character.
- Tarapur MIDC near Boisar (Palghar): bulk drugs, specialty chemicals and textiles in a dense estate; Tarapur was identified as a critically polluted area in the CPCB CEPI assessment
- Taloja MIDC (Raigad, near Navi Mumbai): chemicals, pharma, food and engineering units close to growing residential areas
- Thane-Belapur (TTC) industrial area: chemical, engineering and pharma units along the Thane creek, now surrounded by housing and IT parks
- Dombivli and Ambernath MIDC: dyes, chemicals and intermediates with many small boilers and process vents
- Mahad, Roha and Patalganga (Raigad): chemical, pesticide and pharma intermediates in valleys inland from the coast
- Lote Parshuram (Ratnagiri): chemical and pharma units in hilly Konkan terrain near the Vashishti river
- Pune region: Chakan, Ranjangaon, Talegaon, Kurkumbh and Pimpri-Chinchwad, with automotive, engineering and chemical units
- Nashik: Satpur, Ambad and Sinnar industrial areas with engineering, pharma and food processing
- Chhatrapati Sambhajinagar (Aurangabad): Waluj, Shendra and Chikalthana with automotive, pharma, breweries and engineering
Cumulative Modelling for Maharashtra Chemical and Pharma Units
A typical MIDC chemical or pharma application includes a boiler, a thermic fluid heater, DG sets, scrubber vents from reactors and sometimes a solvent recovery system or incinerator. We model each stack with its own exit conditions and compare process pollutants such as HCl, Cl2, NH3 or VOCs with suitable standards or guideline values, as described in our guide to AERMOD for pharmaceutical and chemical plants.
In Tarapur, Taloja or Dombivli the nearest receptors are often neighbouring factories and housing just outside the estate boundary. Committees increasingly expect a cumulative assessment, so we gather stack data for nearby units from the client, the EIA consultant or public records, and present project increment, cumulative increment and background separately. Where neighbouring data is incomplete we state our assumptions openly.
Chandrapur and Vidarbha: Power, Coal and Cement
Chandrapur is one of Maharashtra's heaviest industrial districts, with a large coal-fired thermal power station, opencast and underground coal mines, cement plants, and paper and ferro-alloy units. It was identified as a critically polluted area in the CPCB CEPI assessment, so projects there face particular scrutiny of their air impact.
Studies in Chandrapur and the wider Vidarbha region often involve tall stacks, large fugitive sources from coal handling and ash dykes, haul roads and mine pits. We cover these using the approaches in our guides to thermal power plants, mining projects and cement plants. Sugar mills and distilleries in western Maharashtra and Marathwada are another regular source of work.
Coastal Mumbai and Konkan: Sea Breeze and CRZ
Mumbai and the Konkan coast are shaped by land and sea breezes. On many days the wind turns onshore in the afternoon and offshore at night, and during the south-west monsoon strong westerly winds and heavy rain dominate. A plume released near Trombay, Uran or Tarapur may therefore travel inland during the day and back towards the sea at night, and the maximum concentration can move with the season. We report results by season where this helps the committee.
Projects in or near the Coastal Regulation Zone, which includes much of Mumbai's waterfront, creeks and the Konkan coast, also need recommendations from the Maharashtra Coastal Zone Management Authority (MCZMA). Refineries, fertiliser and power plants at Trombay and Chembur, port projects at JNPA and Uran, and creekside developments often carry an air quality chapter that the CRZ appraisal will read too. AERMOD does not model shoreline fumigation explicitly, so we state this limitation and choose met data with similar coastal exposure where possible.
Met Data and Western Ghats Terrain for Maharashtra Studies
Hourly surface data for Mumbai studies usually comes from Chhatrapati Shivaji Maharaj International Airport, with the India Meteorological Department (IMD) observatories at Santacruz and Colaba as references. Pune studies use Pune Airport at Lohegaon and IMD Pune, which is one of IMD's main centres. For the rest of the state we look at airports at Nashik, Chhatrapati Sambhajinagar, Nagpur and Kolhapur and at IMD stations near the site. One season of on-site monitoring is usually extended to a full year this way. Our article on meteorological data for air modelling in India explains the options.
Terrain is a real issue in Maharashtra. The Western Ghats rise steeply behind the Konkan coast, so sites at Mahad, Lote Parshuram, Khopoli or Lonavala sit among hills that can be higher than the stack top. Pune lies on the Deccan plateau on the leeward side of the Ghats, with hills around the city and valleys that can trap pollutants on calm winter nights. For these sites we process elevation data in AERMAP so that receptors on hill slopes are treated correctly; our guide to terrain and land use data gives the detail.
How DSTechnoverse Can Help in Mumbai, Pune and Maharashtra
We take Maharashtra projects remotely from Indore, working with developers, plant teams and EIA consultancies through shared files and video meetings. Many consultancies in Mumbai and Pune use us as a white-label partner: we prepare the AERMOD runs, isopleth maps and report chapter in your format and help you answer SEAC or EAC queries. You receive the input and output files, emission calculations, met data processing notes, receptor tables, isopleths and a report section ready for the EIA or consent application.
If you want to run screening studies in-house, our browser-based AERMOD software handles point sources on flat terrain, and firms can ask for a personalised AERMOD Studio. A free demo is available. To discuss a study in Mumbai, Pune, Taloja, Tarapur, Chandrapur or elsewhere in Maharashtra, contact us with your project details.
Frequently Asked Questions
Do you take AERMOD studies for projects in Mumbai or Pune even though you are in Indore?
Yes. All of our modelling is done remotely. Developers, industries and EIA consultancies in Mumbai, Pune and across Maharashtra share stack details, drawings and baseline monitoring data online, and we hold reviews by video call. Field monitoring is done by your EIA consultant or a NABL-accredited laboratory, and we process that data into the model and report.
Does MPCB ask for dispersion modelling for CTE?
Modelling is commonly required through the EIA Terms of Reference, and for larger red category units, expansions in polluted areas or where stack height must be justified. Consent conditions vary between units and regional offices, and practice changes over time, so we recommend confirming the requirement with the concerned MPCB office before the study is scoped.
Which meteorological station is used for a study near Mumbai?
On-site monitoring for the study season comes first. For a full year of hourly data we usually look at Chhatrapati Shivaji Maharaj International Airport, with IMD Santacruz and Colaba as references. For sites in Thane, Raigad or Palghar we check whether a closer station with similar coastal exposure gives a better match before choosing.
Which met data do you use for Pune projects?
Pune studies normally use data from Pune Airport at Lohegaon or IMD Pune, combined with on-site monitoring. Because Pune lies on the plateau east of the Western Ghats, with hills around the city, we also check whether the station represents the site's valley or ridge position and process terrain in AERMAP where it matters.
Does a residential tower or township in MMR or Pune need AERMOD?
Projects that fall under item 8(a) or 8(b) of the EIA Notification 2006 need environmental clearance from SEIAA Maharashtra, and an air quality impact assessment is a normal part of the application. The modelled sources are usually DG sets and construction dust. For tall towers we also check DG stack heights and building downwash.
Our unit is in Tarapur or Taloja MIDC. Will cumulative modelling be needed?
It is likely, especially in Tarapur, which was identified as a critically polluted area in the CPCB CEPI assessment. We model the project increment and the cumulative increment from nearby units separately, add measured background, and explain the source of all neighbouring stack data so the committee can follow the result.
Can you model projects in hilly Konkan locations such as Mahad or Lote Parshuram?
Yes. These sites sit among Western Ghats foothills and river valleys where nearby hills can be higher than stack tops. We process elevation data in AERMAP so receptors on slopes are treated as elevated, and we choose met data that reflects the valley setting as closely as the available stations allow.
Do you handle power, coal and cement projects in Chandrapur?
Yes. Chandrapur projects often combine tall stacks with large fugitive sources from coal handling, ash dykes, haul roads and mine pits. Because Chandrapur was identified as a critically polluted area by CPCB, we give careful attention to cumulative impact and the baseline, and present clear source-wise contributions.
Can you work as a white-label partner for a Mumbai or Pune EIA consultancy?
Yes. We prepare AERMOD runs, isopleth maps and report text in your format and under your name, and help you respond to SEAC or EAC queries. We do not contact your client directly unless you ask us to, and we can handle a steady flow of real estate EC studies alongside industrial work.
Get a Quote on the First Reply
Send us these details and we can scope and quote without a back-and-forth:
- Project location with MIDC area, ward or village and coordinates
- Stack list with height, diameter, temperature, velocity and fuel for boilers, heaters, DG sets and vents
- Building heights and layout, especially for towers and plants with short stacks
- Baseline AAQ and on-site met data, or the monitoring season planned
- ToR, consent copy or SEAC/EAC query letter, if available
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