Iron Testing

Iron levels are commonly tested in water because high levels will cause staining. Also, rust and insoluble iron salts can cause pipe blockages.

Iron is present in variable amounts in natural waters. This is washed from minerals in rocks during weathering processes. Water used in industrial processes must have less than 0.2 mg/L total iron.

  • Pool and spa – High levels of iron in swimming pool water can cause unsightly staining of the pool surfaces.
  • Agriculture – High amounts of iron in water used for irrigation can cause insoluble iron salts to form which can block piping.
  • Drinking water– High levels of iron in drinking water can affect the taste and can also stain laundry and baths/showers/sinks.
  • Wastewater – The total iron levels in industrial water cannot exceed 0.2 mg/L.


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