Conservation pays
Once you cross into the higher slabs, water gets 3–5× more expensive per kilolitre. Halving usage from 30 kL to 15 kL can drop bills by 60–70%. Aerators (₹150), dual-flush cisterns, and shorter showers are the easiest wins.
Municipal water bills use slab tariffs (low rate up to N kilolitres, higher rate beyond), plus a sewerage charge (typically 30–100% of water charge) and a fixed monthly meter charge.
Once you cross into the higher slabs, water gets 3–5× more expensive per kilolitre. Halving usage from 30 kL to 15 kL can drop bills by 60–70%. Aerators (₹150), dual-flush cisterns, and shorter showers are the easiest wins.