India Fuel Retail Outlets — 82k Geocoded Map (Part 2 of 3)

What the dots on this map are actually connected to

Every one of the roughly 82,000 points on this map is, functionally, two different retail businesses sharing one plot of land: a liquid-fuel forecourt selling petrol and diesel under an OMC brand, and, at a growing share of sites, a CNG dispensing point that belongs to an entirely separate distribution system — the city-gas network this blog's Part 1 map (the CGD geographical-area allotments) covers. PNGRB's city-gas rollout has now authorised 307 geographical areas, reaching close to 100 per cent of India's landmass outside the islands and roughly 784 districts, with over 5,665 CNG stations built out as of March 2023. The goal behind that expansion, as PNGRB and the Ministry of Petroleum and Natural Gas have stated it repeatedly, is straightforward: get piped and compressed natural gas within reach of as much of the country as possible, to displace liquid-fuel demand in transport and industry and cut urban air pollution — which is exactly why a retail-outlet map and a CGD-coverage map belong next to each other.

Not every dot gets its gas the same way

What the coordinates on this map don't show is that a CNG-dispensing outlet can be supplied through one of several structurally different arrangements, and which one applies at a given site changes its economics substantially. A CNG mother station sits directly on a natural-gas pipeline and runs a large on-site compressor, both to dispense CNG to vehicles at the site and to fill the mobile cascades — banks of interconnected high-pressure cylinders, commonly holding around 530kg of gas at 250 bar — that get trucked out to sites with no pipeline access. A CNG online station is also pipeline-connected and runs its own compressor, but only to fill its own stationary cascades for dispensing, without supplying other sites. A daughter station, by contrast, has no pipeline connection at all: it receives gas that has already been compressed elsewhere, delivered by mobile cascade, and simply decants and dispenses it. A daughter booster station is the same idea with one refinement — a smaller booster compressor tops up the pressure of gas remaining in a part-used cascade, which is what lets these sites push cascade utilisation up to 70–80 per cent instead of stranding gas that's dropped below dispensing pressure.

Why that split matters for cost, not just plumbing

The pipeline-connected end of that spectrum — mother and online stations — carries the heavy capital cost in this system: industrial-scale compressors, dispensers, cascade-filling infrastructure, and the pipeline tie-in itself. A daughter station's investment is the lowest of the four categories precisely because it never has to own that compression capacity; it's paying, in effect, for the mother station's compression work to already be embedded in the gas it receives. That's the direct answer to why pipeline-connected outlets carry a structurally higher compression-cost burden than cascade-fed ones do — it isn't a pricing quirk, it's that the compressor sits at one specific point in the supply chain (the mother/online station) and every site downstream of it, decanting from a cascade, avoids that cost by construction. For a network this map is trying to visualise at 82,000-outlet scale, that split is the real story underneath the geography: the coastal and metro-adjacent GAs with dense pipeline build-out look very different, economically, from the newer GAs served mostly by cascade until their own pipeline networks catch up.

Where biogas fits into the same pipes and cascades

The same cascade and pipeline infrastructure that moves fossil natural gas to these outlets is also the delivery route for compressed biogas (CBG) under the government's SATAT scheme: CBG plants are explicitly built to distribute their output to fuel-station networks via cascade cylinders or pipeline injection, the identical logistics this piece has just described for CNG. That means a retail outlet on this map showing as CNG-supplied today is, in a growing number of cases, actually blending in or fully switching to CBG as plant capacity scales — without needing any change to the station's own dispensing equipment, since a daughter or booster station can't tell the difference between a cascade filled at a gas-processing plant and one filled at a biogas plant. That fungibility is a large part of why CBG is being positioned as a genuine displacement fuel for fossil CNG at exactly this retail layer, not just a niche rural-energy product.