Harappa had a well-planned drainage system. It was distinctive and well developed.
• The roads and streets were laid out along an approximate “grid” pattern, intersecting at right angles.
• The streets with drains were laid out first and then houses built along them.
• Each house had one wall along a street so that domestic waste water can be flowed out into the drains.
Thus a proper system of drainage was laid down so that no waste water gets collected on the streets. Hygiene and sanitation were its hallmarks.
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