Potable Water Supply
This supply may come from several possible sources.
Tap water systems have been evolving since people first located their homes near a running water supply, e.g., a stream or river.
The water flow also allowed sending waste water away from the domiciles.
Modern indoor plumbing delivers clean, safe, potable water to each service point in the distribution system.
It is imperative that the clean tap water not be contaminated by the waste water (disposal) side of the process system.
Historically, this contamination of drinking water has been the largest killer of humans.