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Report the storage of dangerous fertilisers

By law, you must tell us if you store:

  • more than 25 tonnes of high nitrogen fertiliser (ie ammonium nitrate) when displaying the oxidising substances symbol 
  • more than 150 tonnes of ‘relevant ammonium nitrate mixtures’ where the fertiliser nitrogen content exceeds 15.75%

Please note the HSE will be notified on completion of the online form.

You do not need to tell us if:

  • the total nitrogen content is less than 15.75%
  • the fertiliser does not contain both ammoniac and nitric nitrogen

Report the storage of dangerous fertilisers

You must display the sign for dangerous fertilisers at all entrances to the site:

Dangerous substances signage example

You must display the sign for oxidising agents on all doors with access to your buildings:

 

Oxidising hazard signage example

Read about the Notification and Marking of Sites (NAMOS) regulations on the HSE website.