The addition of chlorine at the headworks of a plant prior to other treatment processes. Done mainly for disinfection and control of tastes, odors, and aquatic growths, and to aid in coagulation and settling. The tendency of the Earth's axis to wobble in space over a period of 23,000 years. The Earth's precession is one of the factors that results in the planet receiving different amounts of solar energy over extended periods of time. The process by which atmospheric moisture falls onto a land or water surface as rain, snow, hail, or other forms of moisture.
Precursors react in sunlight to form ozone or other photochemical oxidants.
Water rights which are acquired by diverting water and putting it to use in accordance with specified procedures. These procedures include filing a request to use unused water in a strewn, river or lake with a state agency. A switch which operates on changes in pressure. Usually this is a diaphragm pressing against a spring. A system of pipes in which water, wastewater, or other liquid is pumped to a higher elevation.