Ancient water purification

Relying mainly on rainwater for drinking, the people of Mandu have developed a very advanced water cleaning mechanism in the 15th century.
Water collected in Baolies was flown first in a small tank filled with limestone, then it passes through various small tanks filled with different materials like coal, fine sand, coarse sand, gravel, herbs, etc and then finally gets collected in a small solid tank, from where it then gets distributed to royalties for drinking.
Mandu, MP,
January 2021
Baoli in the backdrop and limestone tank in front, first step of water purification

Baoli in the backdrop and limestone tank in front, the first step of water purification

The second step of water purification with other materials

The second step of water purification with other materials