Phosphorus

Phosphorus and its Importance to Water Quality

What is Phosphorus? A nonmetallic element of the nitrogen

family Phosphorus is one of the key elements

necessary for growth of plants and animals. Phosphates PO4--- are formed from this

element. Phosphates exist in three forms: orthophosphate, metaphosphate (or polyphosphate) and organically bound phosphate

Acceptable Phosphorus Levels There is no water quality standard

for total phosphorus. A guideline of 0.05 milligrams per

milliliter is used for purposes of comparison.

Sites with total phosphorus concentrations above this level are at risk of excessive algal growth.

Sources of Phosphorus The Primary Point Source for Phosphorus in

surface waters is sewage treatment plants Additional Phosphorus originates from the

use of industrial products, such as toothpaste, detergents, pharmaceuticals, and food-treating compounds

Natural sources include Phosphate deposits/-rich rocks, and sediments in lakes and reservoirs

The Impact of Phosphorus Excessive concentrations of

Phosphorus can cause extensive growth of aquatic plants and algal blooms

This can lead to depletion of oxygen that is dissolved in water, which can ultimately lead to the deaths of fish and other aquatic life.

Sources http://www.state.ky.us/nrepc/water

/wcptp.htm

http://www.deq.state.mi.us/documents/deq-swq-npdes-Phosphorus.pdf

http://www.beec.org/wq/param.html