Ammonium

What is Ammonium (NH4)?
Ammonium (NH4) is a colorless and potent gas that is widely used to make nitrogen-based fertilizers. It is oxidized in the environment and may also be present in trace amounts in natural waters at concentrations less than 0.1 mg/liter. When concentrations are found to be significantly greater than 0.1 mg/liter, i.e. tens to hundreds of mg/liters, it indicates large scale contamination. Ammonia in water can cause corrosion of copper pipes and fittings, causing stains cloths and towels etc. In the Drinking Water Regulations, it is defined as an Indicator parameter.
What is an exceedance of Ammonium (NH4)?
The limit designated for Ammonium (NH4)) in the EU drinking water directive is 0.30mg/l. Therefore, any result above this level is an exceedance for Ammonium.
How can an exceedance of Ammonium (NH4) occur?
The presence of Ammonium (NH4) in water supplies indicates contamination from agricultural or industrial practices as well as sewage systems. Increased levels of ammonium can also occur in areas heavily used for agriculture.