Phosphates are necessary to aquatic plant life. Increases in phosphates can lead to excessive algae growth. Forms of phosphate that occur in water are organic (needed for animal life) and inorganic (needed for plant life.) There are both organic and inorganic sources of phosphate.
Why We Test For Phosphates
Excess phosphates can lead to algae blooms, which increase turbidity and water temperature. When the algae dies, it is consumed by bacteria that significantly decrease the amount of oxygen in water. All of these affects can make habitat uninhabitable for aquatic life.
Sources of Excess Phosphate
Sources of phosphates include sewage treatment plants, septic systems, fertilizers, industrial discharges, and animal manure.
Learn More
To learn more about phosphates, please view this pdf from the USDA published in the journal Issues in Ecology. The University of Minnesota also has information about Phosphorus in Fertilizer.
How Do We Test For Phosphates:
Pdf of sampling technique used by Stream Team.

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