| Primary value | 135 - 150 lpcd (litres per capita per day) |
| Applies to | Residential buildings · Apartment water tank sizing · Domestic water demand calculations |
| Exceptions | Basic / urban area → 135 lpcd |
| Typical / metropolitan → 150 lpcd | |
| Premium / luxury housing → 200 lpcd | |
| Measured as | Total daily water demand per resident, including drinking, cooking, washing, bathing, and flushing. |
| Source | NBC 2016 — Part 9, Section 2 ✓ Verified |
Water demand drives storage tank sizing, pump capacity, and the connection to municipal supply. Underestimating leads to running out of water; overestimating wastes capital on oversized infrastructure.
Indian metros typically use 135-150 lpcd for sizing calculations. Add 10-15% for losses and 1-day reserve for tank capacity.