E. coli is a widespread bacteria present in intestines and excrements of animals and humans. The presence of E. coli can indicate the presence of other germs and pathogens (bacteria , virus). The maximal recommended value for recreational water activity is 200/100 mL (200 MPN).
In aquatic environments, dissolved oxygen (DO) is a relative measure of the amount of oxygen (O2) dissolved in the water. The minimal recommended value for the protection of aquatique life is 6,5 mg/L.
Nitrates are a form of nitrogen found in water and are associated with nutrients. Nitrates generally come from excess fertilizer. In high concentrations nitrates can provoke an excessive growth of algae. The maximal recommended value to assure the protection of the aquatique life is 2,9 mg/L.
Phosphorous comes from the erosion of farm fields enriched with phosphorous, from purification discharge and factory discharge. Phosphorous combined with nitrogen can cause an excessive growth of algae. The maximal recommended value for the protection of the aquatic life is 0,03mg/L.
pH is the measure of the acidity or alkalinity of a solution. The pH of water varies from 0 to 14, 0 being the most acidic and 14 being the most basic. The recommended pH of water for the protection of aquatic life is situated between 6,5 and 9.
