The level of purity of water; the safety or purity of drinking water.
|Water quality testing||
monitoring water for various contaminants to make sure it is safe for fish protection, drinking, and swimming.
A water supply that limits food production, human health, and economic development. Severe scarcity is taken to be equivalent to 1,000 cubic meters per year per person or greater than 40% use... read more
|Water Table, Perched (Perched Ground Water Table)||
The upper surface of a local zone of soil water saturation held above the main body of groundwater by an impermeable layer or stratum, (usually clay) and separated from the main body of... read more
a region or area over which water flows into a particular lake, reservoir, stream, or river.
a dug or drilled hole used to get water from the earth.