The water profile is important to identify conditions or elements existing in the water that may damage or kill plants such as excessive salts and boron. Additionally, dissolved elements in the water can damage irrigation systems and clog emitters. Typical tests for agriculture irrigation water supplies include: pH, specific conductance, total dissolved solids, iron, manganese, boron, sodium, calcium, magnesium, total alkalinity, sodium absorption ratio, and calculated hardness.
Agriculture may be subject to surface water monitoring requirements and monitoring the condition of ponds subject to discharge in streams or other surface water. Essentially, water monitoring and discharge requirements mandate that any water discharged into ground water and surface water systems be essentially pure and free from chemicals and additives resulting from the use of the water. Testing requirements are varied by locale but often include total and fecal coliform, pH, total suspended solids, biologic oxygen demand, total nitrogen, total organic carbon, and others as required by regulation.