Is India's electricity getting cleaner, or only in some states?

How clean is each state's electricity?

The map shows the carbon intensitycarbon intensityHow much CO2 is released per unit of electricity generated, usually gCO2/kWh. A low number means cleaner power.The main way we compare how clean different states' electricity really is. of power generation inside each state in 2024. It is not a story of one Indian grid, but about thirty. The colour on a state tells you how many grams of CO2 are released for every kilowatt-hour of electricity produced there. Dark red means coal-heavy; pale blue or green means clean.

At one end, the Himalayan and northeastern states are almost entirely hydro. Himachal Pradesh, Jammu and Kashmir, Sikkim, and Arunachal Pradesh sit near the methodology floor of about 24 gCO2/kWh. That is not a measured zero, it is a constant applied to grids dominated by renewablesrenewablesEnergy sources that replenish naturally: solar, wind, hydro, and biomass. They produce little or no CO2 when generating electricity.The growth of renewables, especially solar, is the main reason India's clean share is rising. and nuclearnuclearElectricity produced by splitting atoms in a reactor. It is low-carbon but not renewable, and it runs steadily.Nuclear provides about 3% of India's electricity and has a high capacity factor (76%), so it punches above its installed capacity., but it reflects near-zero-carbon generation.

At the other end, the coal belt burns aggressively. Bihar and Jharkhand sit around 815 gCO2/kWh, Chhattisgarh around 806. Those numbers mean that for every unit of power produced inside those states, over 800 grams of CO2 enter the atmosphere. The national average, about 620 gCO2/kWh, sits exactly between the two poles, hiding the entire spread.

It is vital to remember that this is generation, not consumption. A state that hosts a large coal plant may be making power for a neighbouring state, and a state with a clean generating mix may still import dirty power.

Has India's electricity grid really been getting cleaner nationally?

In the big picture, yes. The clean shareclean shareThe percentage of total electricity generation that comes from renewables (hydro, wind, solar, biomass) plus nuclear.The headline metric for how much of India's grid is low-carbon. But it can rise even as coal generation grows. of India's electricity generation, renewables plus nuclear, has risen from 16.8% in 2000 to 26.7% in 2025. The line chart shows a genuine, decade-plus climb. The shift is real: a quarter of the country's electricity now comes from low-carbon sources, up from a sixth at the turn of the century.

"Clean" here means hydropower, wind, solar, biomass, and nuclear. Fossil fuelsfossil fuelsCoal, natural gas, and oil. Burning them for electricity releases CO2, the main driver of climate change.Almost all India's power emissions come from burning coal; gas plays a minor role., coal, gas, oil, are the rest. The climb has not been perfectly steady; a sharp spike in 2020 partly reflects the demand dip during the pandemic lockdown. But the direction is unmistakable. India's renewable capacity additions are beginning to register in the generation numbers.

Still, a rising share is a ratio. It does not guarantee that the absolute amount of dirty power is falling. That is the honest complication the next chart reveals.

If the grid is getting cleaner, why did coal generation keep growing?

Because India needed far more electricity, and clean supply could not keep pace with demand. The multi-line chart shows that from 2000 to 2025, coal generation nearly quadrupled, from roughly 390 TWhTWhTerawatt-hour. One TWh is a billion kilowatt-hours, roughly the annual electricity use of a million Indian homes.All generation figures are in TWh; helps compare the scale of coal, solar, and total demand. to nearly 1,500 TWh. That is not a typo: even as the clean share rose, the absolute amount of coal burned each year surged.

Solar, the brightest spot, climbed from near zero to about 196 TWh. Wind grew from about 1.6 to about 104 TWh. Hydro expanded from about 77 to about 178 TWh, and nuclear from about 16 to about 54 TWh. Gas, the other fossil fuel, actually slipped from about 56 to about 49 TWh. So the fossil growth is almost entirely coal.

The whole pie expanded so fast that even a larger clean slice could not shrink the coal slice. Total generation grew roughly 31% between 2019 and 2024 alone. A rising clean share and growing coal generation are not contradictory; they happen together when demand outruns clean additions.

Why doesn't a megawatt of solar replace a megawatt of coal?

Because a solar panel does not work at night. The simple reason is capacity factorcapacity factorThe share of the year a power plant actually runs at full capacity. A solar panel might have a 16% capacity factor because the sun doesn't shine at night.Explains why solar's installed capacityinstalled capacityThe maximum power a plant can produce at once, measured in megawatts (MW). It's like the size of a pipe, not the water that flows through it.States with high installed solar capacity may still generate modest amounts because of low capacity factors. share (21%) far exceeds its generation share (7%).: the share of the year a plant actually runs at full power. Nuclear runs at 76% capacity factor in India, coal at 69%. They are reliable baseload. Hydro, at 34%, swings with the seasons. Wind is 19%. Solar is just 16%. Gas is 16%, and bioenergy 14%.

A 100 MW solar plant, on a 16% capacity factor, generates about 140 million units a year. A 100 MW coal plant at 69% generates about 605 million units. To match the annual output of that single coal plant, you would need roughly 4.3 times the solar capacity, over 430 MW of panels. And you would still need to handle nights and cloudy days.

So when you see that solar accounts for 21% of India's installed capacity but only around 7% of actual generation, that gap is not a policy failure. It is physics. A megawatt of solar simply produces far fewer kilowatt-hours in a year than a megawatt of coal or nuclear. This is the reality that means India must install enormous amounts of solar to make a dent in coal's dominance.

What are the three different ways India's states generate their power?

Open a map of India's power generation, and you see three distinct grids. Not political boundaries, but energy geologies.

First, the hydro states. In the Himalayan north and the northeastern hill states, steep rivers have been harnessed for decades. Himachal Pradesh generates almost 100% of its electricity from hydro. These states did not go clean through recent policies; they were born clean, because the mountains left them no coal and plenty of water. Their carbon intensity sits near the 24 gCO2/kWh floor, but it is not a transition, it is an inheritance.

Second, the wind and solar belt. Rajasthan, Gujarat, and Tamil Nadu have built their way to high clean shares with new capital, not old rivers. Wind corridors in the south and west, and vast solar parks in the desert, have pushed the share of renewables in generation to levels the coal belt can only dream of. These states are actually moving the needle.

Third, the coal heartland. East of the Ganges and across the central belt, coal is king. Chhattisgarh runs on 98% coal, Bihar and Jharkhand on 99% fossil fuels. These states host India's largest coal reserves and generate the power that feeds the national grid, but their own grids remain overwhelmingly dirty. A high clean share in the national average papers over this fundamental divide.

Where did India actually build all its wind and solar?

Not everywhere. Look at the bars of installed wind and solar capacity in 2024, and the concentration is stark. Rajasthan leads with about 31,700 MW. Gujarat follows with about 29,300 MW. Tamil Nadu about 20,900 MW, Karnataka about 15,700 MW, Maharashtra about 14,200 MW. After that, the numbers drop sharply: Andhra Pradesh about 8,800 MW, Madhya Pradesh about 7,800 MW, Telangana about 5,000 MW, Uttar Pradesh about 3,300 MW, and Haryana about 2,000 MW.

The top five states hold the overwhelming majority of India's renewable hardware. This is the real transition landscape, stripped of the inherited hydro that distorts the clean share map. But again, capacity is not generation. Those roughly 31,700 MW in Rajasthan, with a typical solar capacity factor of around 16% in the desert, translate to far fewer actual units than the installed figure suggests. Still, it is in these states that the physical assets of the energy transition are going into the ground.

Of the new power added since 2019, how much was clean?

This is the toughest test of a transition. When demand surged, did a state reach for more coal or more clean power? Between 2019 and 2024, India's total generation rose by about 425 TWh. Nationally, only about 26% of that new power came from clean sources. Three-quarters of the growth was fossil.

The state-by-state breakdown is even more revealing. Gujarat is an outlier: it met more than all its new demand with clean power, reducing fossil generation in absolute terms. Its clean share of growth was 117%. Rajasthan (69%) and Tamil Nadu (61%) also covered most of their growth with renewables. But many other states barely moved. Bihar met essentially 0% of its new demand with clean power. Odisha and West Bengal around 1%, Chhattisgarh 4%, Uttar Pradesh 5%. Even Karnataka, with its large renewable fleet, only managed 27% clean growth.

A state can have a high clean share of total generation and still lock in fossil growth at the margin. The marginal test reveals who is truly transitioning and who is just running on inherited hydro or a large but static renewable base.

If the grid is getting cleaner, why are power emissions still rising in most states?

Because absolute emissions follow the tonnes of coal burned, not the share of clean power. Between 2019 and 2024, India's power-sector CO2 emissions rose by roughly 267 million tonnes. The map of emissions change is almost uniformly red. Chhattisgarh added about 42 million tonnes, Uttar Pradesh about 33, Madhya Pradesh about 26, Odisha about 23, and Bihar about 21. These are massive increases.

Only Gujarat managed a meaningful cut, reducing its power emissions by about 2.4 million tonnes over the same period, a direct consequence of its aggressive solar and wind build. A handful of other states eked out tiny declines, but the overwhelming message is that generation growth is swamping the carbon intensity improvements. India is producing more electricity each year, and the extra power is still largely coal.

Falling carbon intensity per kilowatt-hour is not the same as falling total emissions. As long as the pie keeps growing, the tonnes can rise even as each unit gets marginally cleaner. This is the central honesty the clean share narrative must hold.

Where do India's power-sector emissions actually come from?

Intensity tells you how dirty each unit is; this chart tells you where the physical tonnes are. In 2024, the largest absolute emitter was Chhattisgarh, at about 135 million tonnes of CO2. Uttar Pradesh was almost identical, about 132 million tonnes, followed by Madhya Pradesh at about 121 million tonnes and Maharashtra at about 113 million tonnes. Rounding out the top ten: West Bengal about 76 million tonnes, Gujarat about 76 million tonnes, Tamil Nadu about 64 million tonnes, Andhra Pradesh about 59 million tonnes, Odisha about 56 million tonnes, and Rajasthan about 56 million tonnes.

Notice that some of these are not the states with the highest carbon intensity. Chhattisgarh and Uttar Pradesh are both coal-heavy, but Maharashtra and Gujarat are not the worst in intensity terms. Yet they appear high on the absolute list because they generate a lot of electricity. This is where decarbonisation efforts must focus: not only on making each unit cleaner, but on displacing the sheer volume of coal generation in these big states.

Again, these are production-side emissions. A state that hosts a large coal power complex may be generating electricity and emissions for consumers hundreds of kilometres away, so the climate burden is physically located there but economically shared.

How does the monsoon decide India's clean power output?

India's clean power is not a flat, steady stream. It breathes with the seasons, and the monsoonmonsoonThe seasonal rainy season in South Asia (June, September). It fills rivers for hydro and drives strong winds.Explains why hydro and wind output surge in the second half of the year, giving India's clean power a strong seasonal rhythm. is its lungs. Using monthly data for 2024, we can see the rhythm.

Wind generation nearly quadruples from its November low to its July high, a 4.4-fold swing. Hydro more than triples from its February trough to its August-September peak, a 3.6-fold swing. Solar is the steadiest, with only about a 1.4-fold swing between its winter low and summer high, but even that matters.

Coal, the workhorse, dips noticeably during the monsoon months as hydro and wind surge. In May 2024, coal generated about 123 TWh; by September, that had fallen to about 100 TWh. The monsoon effectively pushes coal aside for a few months, giving the grid a cleaner season. But this is one year's data; it shows a seasonal shape, not a long-term trend. Dry years will suppress hydro, and the wind does not always blow. The clean grid's output is hostage to the sky.

This variability is the central challenge. India must manage a grid where clean power can surge 3-4 times between months, and where the backup, still coal, has to be ready to ramp up when the rains end.

How should you read these numbers?

None of these numbers are magic. They come with clear boundaries and a few honest footnotes.

The state-level data is drawn from Ember's India electricity dataset, which compiles figures from the Central Electricity Authority (CEA) and the Ministry of New and Renewable Energy (MNRE) and releases them under a Creative Commons licence. The national long-run series from 2000 to 2025 comes from Ember's separately built electricity database. These two Ember series are compiled differently and differ a little in level: the national series puts 2024 coal generation somewhat higher than the state figures add up to, so the long-run national chart and the state-level charts are best read on their own terms rather than summed against each other. The state data covers only the years 2019 to 2024. That is a six-year snapshot of the current transition, not a multi-decade trend. Longer comparisons at the state level are not yet possible with this dataset.

Every figure in these charts is electricity generated inside a state's boundaries. It is not the electricity consumed by that state's residents. Power crosses borders constantly, so a state with a clean generation mixgeneration mixThe combination of fuels used to produce electricity: coal, gas, hydro, nuclear, solar, wind, etc.Different states have very different mixes, which explains why some are clean and others are coal-heavy. may still use dirty power imported from elsewhere, and a coal-heavy state may be exporting its emissions.

The carbon intensity floor of about 24 gCO2/kWh seen in hydro-dominated states is a methodology constant, not a measured value. It should not be over-interpreted as a precise zero-carbon claim. Similarly, the emissions figures are estimates based on generation and fuel types; they are not direct stack measurements.

Finally, correlation is not causation. When a state's clean share rises as coal emissions also rise, that does not mean the clean additions caused the coal growth. It reflects the deeper reality that India's electricity demand is growing so fast that it is adding all sources simultaneously. The numbers in these charts reveal what is happening, not always why.