Manufacturing Industries of India: Location and Distribution

1. Manufacturing and its importance to India

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• Manufacturing means turning raw materials into more valuable goods in large quantities. Examples are paper from wood, sugar from cane, steel from iron ore and aluminium from bauxite (Class 10, Manufacturing Industries).
• Class 12, Secondary Activities adds value addition: cotton in the boll becomes more useful once it is spun into yarn. It also lists the traits of modern large-scale manufacturing: specialisation, mechanisation and automation, technological innovation, organisational structure, and uneven geographic distribution.
• NCERT says a country's economic strength is measured by its manufacturing.
• Importance of manufacturing (Class 10):
• It modernises agriculture and gives people jobs outside farming, in the secondary and tertiary sectors.
• It is needed to remove unemployment and poverty. This was the idea behind public and joint sector industries.
• It reduces regional disparities when industries are set up in tribal and backward areas.

• It earns foreign exchange through exports.

• Agriculture and industry move together. Agro-industries buy farm produce and sell farmers pumps, fertilisers, pesticides, PVC pipes and tools.

• Under globalisation, being self-sufficient is not enough. Indian goods must match world quality.
• Beyond NCERT: manufacturing has stayed at about 15-17% of GDP. The National Manufacturing Policy (2011) aimed for 25%, and Make in India followed in 2014. PLI schemes started in 2020 and cover 14 sectors (verify current). The economics belong to industrial-policy-psu-msme.

2. Industrial location factors and classification of industries

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• Location factors (Class 12): an industry sets up where its production cost is lowest.
• Market (people who want the goods and can pay for them) is the most important factor.
• Raw material: cheap, bulky, weight-losing or perishable inputs pull industry close to their source. Examples are steel, sugar, cement and dairy.
• Labour matters less now because of automation.
• Energy: power-hungry industries such as aluminium go to cheap power. Hydel power and petroleum have reduced coal's pull.
• Transport and communication, and government regional policy for balanced development.
• Agglomeration economies: savings a firm gets from being near a leader industry and other units.

• These factors work together.

• Footloose industries can locate almost anywhere. They use components available everywhere, employ few people and pollute little. Their main need is good road access.

• High-tech industries depend heavily on R and D and employ mostly white-collar staff in campus-like parks. When they cluster into a self-sustaining region, it is called a technopolis, such as Silicon Valley. Ask yourself whether Bengaluru is one.

Basis	Classes
Raw material	Agro, mineral, chemical, forest, animal-based
Role	Basic or key (iron and steel, copper and aluminium smelting) vs consumer
Capital	Small-scale has an investment ceiling (NCERT: ₹1 crore; now combined investment-turnover limits, revised 2020 and 2025, verify current)
Size	Household or cottage, small, large
Ownership	Public (BHEL, SAIL), private (TISCO, Bajaj Auto, Dabur), joint (Oil India), cooperative
Bulk	Heavy vs light

• Cooperative sector industry: owned and run by the people who supply the raw material, by workers, or by both. They pool their resources and share profits or losses in proportion. Examples are Maharashtra sugar mills, Kerala coir and Amul dairy (Anand). The model suits seasonal industries supplied by farmers.

3. Textile industry: cotton, jute and the new textile parks

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• Textile industry: it gives a large share of industrial output, jobs and export earnings. NCERT calls it the only industry that is self-reliant and complete across the value chain, from fibre to high-value products.
• Cotton textile industry
• Before industry, cotton cloth was hand-spun and hand-woven. It suffered in colonial times against English mill cloth.
• The first successful mill opened in Mumbai in 1854. Both World Wars raised demand.
• Early mills grew in the Maharashtra-Gujarat cotton belt. That area had raw cotton, a market, a port, labour and a moist climate, which means less yarn breakage.
• Spinning is concentrated in Maharashtra, Gujarat and Tamil Nadu. Weaving is spread out across handloom, powerloom and mills, and its quality is lower.

• The industry later spread to Ahmedabad ("Manchester of India"), Coimbatore, Kanpur, Indore and Solapur.

• Khadi: hand-spun, hand-woven cloth that Gandhi promoted for swadeshi. It is a cottage industry that gives home employment and is supported by KVIC (1957).

• Jute textile industry
• India is the largest producer of raw jute and jute goods. It is the second-largest exporter, after Bangladesh.
• The first mill opened at Rishra near Kolkata in 1855.
• Mills line the Hugli for nearby jute fields, cheap water transport, plenty of water for processing, cheap labour and Kolkata's port and banks.
• At Partition, the mills stayed in India but three-fourths of the jute area went to East Pakistan.

• The Jute Packaging Materials Act 1987 makes jute bags compulsory for foodgrain.

• Tiruppur knitwear cluster (western Tamil Nadu) makes a large share of India's cotton knitwear exports. Dye waste in the Noyyal river led to court-ordered zero liquid discharge in 2011.

• PM MITRA parks (2023) are seven "farm to foreign" parks: Virudhunagar (TN), Warangal (Telangana), Navsari (Gujarat), Kalaburagi (Karnataka), Dhar (MP), Lucknow (UP) and Amravati (Maharashtra).

4. Sugar, leather and other agro- and animal-based industries

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• Sugar industry
• India is the world's second-largest sugar producer after Brazil, and has at times been first (verify current). It is first in gur and khandsari.
• Cane is bulky and loses sucrose while being transported. So mills sit near the cane fields (raw-material orientation).
• Sixty per cent of mills are in Uttar Pradesh and Bihar, but the industry is moving to Maharashtra, Karnataka and the south. Three reasons:
  • The cane there has higher sucrose content.
  • A cooler climate gives a longer crushing season.
  • Cooperatives work better there.
• Because the work is seasonal, it suits cooperatives.

• Beyond NCERT: molasses is used for ethanol blending and bagasse for co-generation of power. Thirsty cane in drought-prone Marathwada is a sustainability problem.

• Other agro-processing (Class 12): food processing, tea, coffee, edible oils, rubber and agri-business (industrial-scale "agro-factories").

• Animal-based industries: leather and wool.
• Leather industry clusters use hides from India's large livestock and cheap labour. The main clusters are:
• Kanpur and Agra (UP)
• The Vellore belt of Tamil Nadu (Ambur, Vaniyambadi, Ranipet)

• Kolkata (Bantala)

• Chromium-laden tannery waste pollutes the Ganga at Kanpur and the Palar river.

5. Iron and steel industry and the major plants

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• Iron and steel industry: a basic industry. Heavy, medium and light industries all depend on it for machinery, and steel use is an index of development.
• Inputs are iron ore, coking coal and limestone in about 4:2:1, plus manganese to harden the steel. Both inputs and outputs are heavy, so plants seek the lowest transport cost.
• The Chota Nagpur plateau has the largest concentration. It offers cheap, high-grade ore and coal close together, cheap labour and a big home market. Exercise: lay the iron ore, manganese and coal maps (Class 10, Minerals and Energy Resources) over the steel plant map.

Integrated steel plants of India

Plant	State	Note
TISCO, Jamshedpur (1907)	Jharkhand	Private; Subarnarekha-Kharkai confluence; ore from Noamundi, coal from Jharia
IISCO, Burnpur	West Bengal	SAIL
Visvesvaraya, Bhadravati (1923)	Karnataka	Charcoal-based at first
Bhilai	Chhattisgarh	USSR; ore from Dalli-Rajhara
Rourkela	Odisha	West Germany
Durgapur	West Bengal	UK
Bokaro	Jharkhand	USSR
RINL Visakhapatnam	Andhra Pradesh	First shore-based plant; imported coking coal
JSW Vijayanagar (Toranagallu, Ballari)	Karnataka	Private

• Salem makes special steels. New capacity is coming up at Kalinganagar, Angul and Jharsuguda, and on the coast (verify current).
• India became the world's second-largest crude steel producer in 2018. National Steel Policy 2017 targets 300 million tonnes of capacity by 2030-31 (verify current).
• Green steel is low-emission steel made with hydrogen or renewable power, using direct reduced iron (DRI) and electric arc furnaces. The Green Steel Taxonomy (December 2024) grades steel by emissions per tonne. The industry's weak spot is its dependence on imported coking coal.

6. Aluminium smelting and other metallurgical industries

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• Aluminium smelting is India's second most important metallurgical industry (Class 10).
• Aluminium is light, resists corrosion, conducts heat well and is malleable. It becomes strong in alloys.

• It is used for aircraft, utensils and wires, and it replaces steel, copper, zinc and lead in many uses.

• Location: NCERT names two prime factors: regular, cheap electricity and an assured supply of bauxite (a bulky, dark reddish rock). Class 12 uses aluminium as its example of an energy-oriented industry.

• Process: bauxite → alumina (in a refinery) → aluminium (in a smelter, which uses a huge amount of power).
• NCERT lists plants in Odisha, West Bengal, Kerala, UP, Chhattisgarh, Maharashtra and Tamil Nadu.
• NALCO (public sector, 1981) works entirely in Odisha: bauxite mine at Panchpatmali → alumina refinery at Damanjodi (Koraput) → smelter at Angul.
• Other plants:
• Hindalco, Renukoot (UP), near the Rihand dam's hydel power and Singrauli coal
• BALCO, Korba (Chhattisgarh)

• Vedanta, Jharsuguda and Lanjigarh (Odisha). In the Niyamgiri case (2013), the Dongria Kondh gram sabhas rejected bauxite mining.

• India is among the world's largest aluminium producers (verify current).

• Copper smelting: Khetri (Rajasthan), Ghatsila (Jharkhand) and Dahej (Gujarat). The Sterlite plant at Thoothukudi was shut in 2018 after protests.

7. Chemicals, fertilisers, refineries and pharmaceuticals

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• Chemical industry: fast-growing, with both large and small units.
• Inorganic chemicals include sulphuric acid, nitric acid, alkalis, soda ash and caustic soda. They are spread across India because inputs and markets are everywhere. Soda ash clusters on the Gujarat coast near salt and limestone.
• Organic chemicals (petrochemicals for fibres, rubber, plastics, dyes and drugs) locate near refineries.

• The chemical industry is its own largest consumer.

• Fertiliser industry

• It makes nitrogenous fertiliser (mainly urea), phosphatic fertiliser and DAP, and complex NPK.
• Potash is wholly imported because India has no commercial reserves.
• The industry spread after the Green Revolution. Gujarat, TN, UP, Punjab and Kerala give about half of output.

• Beyond NCERT: urea plants run on natural gas from the HVJ and Urja Ganga pipelines. Plants at Gorakhpur, Sindri, Barauni and Ramagundam have been revived, and Talcher uses coal gasification. IFFCO launched nano urea in 2021 (verify current).

• Refinery locations in India

• Coastal refineries use imported crude: Jamnagar and Vadinar, Mumbai, Kochi, Mangaluru, Visakhapatnam, Chennai and Paradip.

• Inland refineries are near markets or old oilfields and are fed by pipelines: Mathura, Panipat, Barauni, Bina, Bongaigaon, Guwahati, Numaligarh and Digboi.

• Jamnagar refinery (Reliance) on the Gulf of Kutch is the world's largest single-site refinery, at about 1.4 million barrels a day. It is close to Gulf crude and export markets.

• Pharmaceutical clusters of India: Hyderabad (Genome Valley), Baddi (HP), Ahmedabad-Vadodara, Mumbai-Pune, Visakhapatnam and Sikkim. India is a leading supplier of generic medicines and vaccines.
• Bulk drug parks (2022) at Bharuch (Gujarat), Una (HP) and Kakinada (AP) aim to cut dependence on China for active pharmaceutical ingredients (verify current).

8. Cement, automobiles and shipbuilding

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• Cement industry
• It uses bulky limestone, silica and gypsum, plus coal, power and rail transport. So plants sit near limestone deposits:
  • Satna-Katni and Rewa (MP)
  • Chandrapur (Maharashtra)
  • Bilaspur-Raipur (Chhattisgarh)
  • Chittorgarh (Rajasthan)
  • The Kurnool-Nalgonda belt
• Gujarat plants serve Gulf markets.

• The first plant opened in Chennai in 1904. India is the world's second-largest cement producer (verify current). Blended cement uses fly ash and slag.

• Automobile industry

• NCERT says it grew strongly after liberalisation because new models raised demand. NCERT centres: Delhi, Gurugram, Mumbai, Pune, Chennai, Kolkata, Lucknow, Indore, Hyderabad, Jamshedpur and Bengaluru.
• Beyond NCERT clusters: Gurugram-Manesar (Maruti, 1983), Pune-Chakan, Chennai-Sriperumbudur ("Detroit of Asia", with port access), Sanand (Gujarat), Hosur-Bengaluru and Jamshedpur.
• The key factor is agglomeration with component suppliers and skilled labour.

• India is the largest two-wheeler maker. EV manufacturing is moving to TN, Karnataka and Maharashtra (verify current).

• Shipbuilding clusters: Cochin Shipyard (built INS Vikrant, commissioned 2022), Mazagon Dock (Mumbai), Garden Reach (Kolkata), Hindustan Shipyard (Visakhapatnam) and Goa Shipyard. India's share of world shipbuilding is tiny. A 2025 maritime package plans new clusters (verify current).

9. Information technology, electronics and semiconductors

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• Information technology and electronics industry (Class 10)
• It makes products from transistor sets and TVs to telecom equipment, telephone exchanges, radars and computers.
• Bengaluru is the "electronic capital of India." Other centres are Mumbai, Delhi, Hyderabad, Pune, Chennai, Kolkata, Lucknow and Coimbatore. The main concentration is in Bengaluru, Noida, Mumbai, Chennai, Hyderabad and Pune, shown on NCERT's map of Software Technology Parks.

• Its biggest gains are jobs and foreign exchange from software exports.

• Location logic: IT is footloose and high-tech (Class 12). It needs skilled graduates, sites on the edges of metros and good connectivity. Early state support came from STPI (1991).

• Electronics manufacturing hubs: India is the world's second-largest mobile phone maker. Assembly is concentrated in Noida (UP), Sriperumbudur and Hosur (TN) and Bengaluru, helped by the 2020 PLI scheme and iPhone exports (verify current).
• India Semiconductor Mission (December 2021; ₹76,000 crore). Approved units (verify current):
• Micron assembly and test plant, Sanand (Gujarat)
• Tata-PSMC fab, Dholera (Gujarat)
• Tata assembly unit, Jagiroad (Assam)
• CG Power and Kaynes units, Sanand

• Later units in Odisha and elsewhere

• Constraints: reliable water and power, ultra-pure chemicals and skilled engineers. Gujarat was chosen for land, policy and ports. Assam offers an eastern location.

10. Industrial regions and product-specialised clusters

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The current NCERT has dropped these regions, but they are still asked. They come from the eight-region scheme in earlier Class 12 editions.

Region	Base → present
Mumbai-Pune industrial region (Thane, Nashik, Pimpri-Chinchwad)	Cotton mills, Bombay High oil, Western Ghats hydel → engineering, cars, petrochemicals, pharma, IT
Hugli industrial region (Bansberia to Birlanagar)	Jute, river port, Chota Nagpur coal and iron; declined after Partition and through labour and power problems
Bengaluru-Tamil Nadu industrial region (Bengaluru-Hosur-Salem-Coimbatore-Chennai-Madurai)	Cotton, Pykara hydel, public-sector engineering → cars, electronics, software
Gujarat industrial region (Ahmedabad-Vadodara to Valsad and Surat)	Textiles → petrochemicals, fertilisers, diamonds; Kandla, Mundra, Cambay oil and gas
Chota Nagpur industrial region (Jharkhand, north Odisha, western West Bengal)	Steel at Jamshedpur, Bokaro, Durgapur, Burnpur; Damodar coal, Singhbhum-Odisha ore, DVC power
Visakhapatnam-Guntur industrial region	Port, shipbuilding, steel, refinery, fertilisers, KG gas
Gurugram-Delhi-Meerut industrial region	No minerals but a huge market → light, footloose industry (cars, electronics, software)
Kollam-Thiruvananthapuram industrial region	Coir, cashew, rubber, fish processing, software (agro- and market-based)

• Product-specialised industrial towns: Tiruppur knitwear, Surat diamonds and synthetics, Moradabad brass, Firozabad glass bangles, Aligarh locks, Sivakasi fireworks and printing, Bhadohi carpets, Ludhiana hosiery, Jalandhar sports goods, Kanpur leather and Rajkot engineering. They show agglomeration economies working at a small scale.
• Surat diamond industry: Surat cuts and polishes most of the world's diamonds, using skills spread by the Palanpuri Jain and Kathiawadi communities. The Surat Diamond Bourse (2023) is among the world's largest office buildings.
• One District One Product (UP 2018, later national) picks one product per district, such as Moradabad brass, Kannauj perfume or Banaras silk. It gives branding, credit and export support and links to GI tags (verify current).

11. Industrial corridors and planned industrial cities

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• Industrial corridor: a planned belt of industry and infrastructure along a major transport route. Firms get land, power, logistics and agglomeration from the first day. This is Class 12's government-policy and transport factors put into practice.
• NICDC develops 11 corridors:
• Delhi-Mumbai, Amritsar-Kolkata, Chennai-Bengaluru, Bengaluru-Mumbai
• East Coast (Vizag-Chennai), Hyderabad-Bengaluru, Hyderabad-Nagpur, Hyderabad-Warangal

• Odisha Economic Corridor, Delhi-Nagpur, Chennai-Kanyakumari

• August 2024: 12 new industrial smart cities were approved, including Khurpia, Rajpura-Patiala, Dighi, Palakkad, Agra, Prayagraj, Gaya, Zaheerabad, Orvakal, Kopparthy and Jodhpur-Pali (verify current).

• Delhi-Mumbai Industrial Corridor (2007, with Japan): about 1,500 km along the Western Dedicated Freight Corridor through UP, Haryana, Rajasthan, MP, Gujarat and Maharashtra. Its nodes include Dholera, Shendra-Bidkin (AURIC), the Greater Noida township and Vikram Udyogpuri (Ujjain).
• Dholera Special Investment Region: a new city built from scratch on the Gulf of Khambhat (Gujarat). It hosts the Tata-PSMC semiconductor fab, approved in 2024.
• Defence industrial corridors (2018), building on ordnance factories, HAL and supplier bases:
• UP: Agra, Aligarh, Chitrakoot, Jhansi, Kanpur, Lucknow

• TN: Chennai, Coimbatore, Hosur, Salem, Tiruchirappalli

• Critique: land acquisition is slow, the coastal ecology at Dholera is at risk, and it is unclear whether corridors deepen or reduce regional imbalance.

12. Industrial pollution and its control

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• Industrial pollution affects air, water, land and noise, and thermal power plants are among the polluters (Class 10).
• Air: sulphur dioxide (SO₂), carbon monoxide (CO) and particulates from chemical and paper units, brick kilns, refineries and smelters. Toxic gas leaks are also a danger, as in Bhopal (1984).
• Water: dyes, acids, salts, lead and mercury from paper, chemical, textile, refinery, tannery and electroplating units.
• Thermal: hot water drained into rivers and ponds harms aquatic life.
• Land: dumped waste whose pollutants seep into groundwater. Nuclear waste causes cancers and birth defects.

• Major solid wastes: fly ash, phosphogypsum and steel slag.

• Control (Class 10): each litre of waste water pollutes eight times as much freshwater. Remedies:

• Reuse and recycle water, and harvest rainwater.
• Regulate how much groundwater industry draws.

• Treat effluents in three stages:

  • Primary: mechanical (screening, grinding, flocculation, sedimentation)
  • Secondary: biological
  • Tertiary: biological, chemical and physical, with recycling

• Electrostatic precipitator: a smokestack device with electrically charged plates that catch dust from flue gas. It works alongside fabric filters, scrubbers and inertial separators. Using oil or gas instead of coal also cuts smoke, and silencers cut noise.

• NTPC (1975), India's largest power generator, has ISO 14001 certification. It manages pollution through ash utilisation, green belts, ash ponds and ash-water recycling, as at Ramagundam (Telangana).
• Fly ash is the fine ash left after burning coal. The 2021 rules require 100% use in bricks, cement, roads and mine filling.
• The Comprehensive Environmental Pollution Index (CPCB, 2009) scored industrial clusters on air, water and land pollution. Ankleshwar and Vapi (Gujarat) topped the list, and Ghaziabad and Singrauli were also critical. Other tools are zero liquid discharge, online emission monitoring and the polluter pays principle.

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Exam angles

Prelims — high-yield facts and traps

• Firsts: cotton mill Mumbai 1854 · jute mill Rishra 1855 · cement Chennai 1904 · TISCO 1907 · Visvesvaraya 1923 · NALCO 1981.
• NALCO chain (all Odisha): Panchpatmali (bauxite) → Damanjodi (alumina) → Angul (smelter).
• Steel plants with collaborator and state: Bhilai (USSR, Chhattisgarh), Bokaro (USSR, Jharkhand), Rourkela (West Germany, Odisha), Durgapur (UK, West Bengal). Visakhapatnam is the first shore-based plant.
• Steel inputs are ore, coking coal and limestone at 4:2:1, with manganese to harden. Aluminium's two prime factors are power and bauxite.
• Classification traps: Oil India is joint sector. Cooperative examples are Maharashtra sugar and Kerala coir. Iron and steel and aluminium smelting are basic industries, not consumer industries.
• "Sugar, cotton textiles and vegetable oils are footloose" is FALSE. They are raw-material oriented.
• "India has some potash reserves" is FALSE. Potash is wholly imported. Gujarat, TN, UP, Punjab and Kerala give about half of fertiliser output.
• Cluster matching: Tiruppur knitwear, Sivakasi fireworks, Firozabad bangles, Moradabad brass, Aligarh locks, Surat diamonds, Baddi pharma, Sriperumbudur electronics.
• Scheme sites:
• PM MITRA: Virudhunagar, Warangal, Navsari, Kalaburagi, Dhar, Lucknow, Amravati.
• Bulk drug parks: Bharuch, Una, Kakinada.
• Semiconductor units: Sanand, Dholera, Jagiroad.

• DMIC nodes: Dholera, AURIC, Greater Noida, Vikram Udyogpuri.

• Pollution control: electrostatic precipitator, scrubber, and the three stages of effluent treatment. Ankleshwar and Vapi topped the CEPI list.

Mains — GS-I and GS-III themes

1. Why is iron and steel concentrated in the Chota Nagpur plateau, and why are newer plants coming up on the coast?
2. The sugar industry's shift from north India to the south and west: causes and consequences.
3. The decline of the Hugli region, compared with the rise of the market-led Gurugram-Delhi-Meerut and Bengaluru regions.
4. Can industrial corridors reduce regional disparities? Discuss with DMIC and the 2024 smart cities.
5. Location factors for IT and electronics, and the geography of India's semiconductor push.
6. Industrial pollution: its sources, the critically polluted clusters, and remedies such as ZLD and the polluter pays principle.
7. "Manufacturing is the backbone of development." Examine India's stagnant manufacturing share.

Current-affairs hooks

• Semiconductor approvals and the first chips from Indian units. PLI outcomes, iPhone exports, EV and battery gigafactory sites.
• Steel output rankings, green steel, and the EU's CBAM (carbon border tax) on steel and aluminium exports.
• Progress on industrial smart cities and corridors. PM MITRA allotments, bulk drug parks, the shipbuilding package.
• Industrial gas leaks and accidents, and CPCB assessments of polluted clusters.