Fact: The City of Lusaka sits on a Limestone bedrock which is a rock form of Calcium Carbonate (CaCO3). This means most of its water table is covered by the rock and at significant depths which becomes tricky to access.
Fact: Lusaka City is in a Sanitation Crisis. Statistics indicate 90% of residents rely on pit latrines and only 10% use sewers & septic tanks.
Repercussions: Because of all this, both new home owners and old home owners have to search high and low for not only water, but safe water for human consumption. This can of course be a costly enterprise to undertake but the long term effects are quite rewarding. Because of this rock beneath, it’s not often that sinking boreholes is successful, not even when dug at an eyebrow-raising depth of 150+ meters.
Therefore, alternative options now have to be sought if we are to be proactive. One such option is a Domestic Water Harvesting & Purification Plant for water and a common Cesspool for sewage. The former, however, is only effective for areas endowed with natural water resources like rivers and streams, unless intended only for use in the Rainy Season then by all means.
For this to work, all you’ll need is a Water Pump, a Sand Tank, Water Filters, Chlorine Tank and Pipes to complete the network.
Thence, what you do first is to identify a resource with running water.
Securing a path for pipes would save best than when left unattended since tampering in the way of wear and tear, and vandalism might be a commonplace.
The first in the network is a suction pipe that draws water from the resource with the help of a fuel run pump, through a chlorine tank and into a reservoir tank at Ground level. At the press of a switch, this water is sent through a series of pipes and through a sand tank which traps all manner of particles from the chlorinated water.
From there, water goes through a further network of pipes during the filtration process and upwards towards an elevated tank before gravity can finally send it down at the turn of a tap in the house for consumption.
Lastly, it’d be wise to take a sample of this water to a Laboratory at either the Zambia Bureau of Standards (ZABS, hereafter) or the University of Zambia (UNZA, hereafter) just to be sure of purity.