Phosphate is a nutrient needed for plant and animal growth and is also a fundamental element in metabolic reactions. High levels of this nutrient can lead to overgrowth of plants, increased bacteria activity, and decreased dissolved oxygen levels.

Phosphate comes from several sources including human and animal waste, industrial pollution, and agricultural runoff.

Phosphate Procedure

  • Fill the test tube (0102) to the 10 mL line with the water sample.

  • Add one Phosphorus TesTab (5422).

  • Cap and mix by inverting until the tablet has disintegrated. Bits of material may remain in the sample.

  • Wait 5 minutes for the blue color to develop.

  • Compare the Color Of the sample to the Phosphate color chart. Record the result as ppm Phosphate.