By email 
Ref : 09/12/23/lk/386 
Health Protection Agency
 
Communications 
 
Public Information Access 
Mr Michael Jones 
61 Colindale Avenue 
[email address] 
London 
NW9 5EQ 
 
23 December 2009 
Tel +44 (0)20 8327 6920 
Fax +44 (0)20 8327 6633 
 
 
 
www.hpa.org.uk 
Email: [Health Protection Agency request email] 
 
Dear Mr Jones 
 
Re:  Chloramine in water 
 
Thank you for your request for further clarification regarding a letter the Health 
Protection Agency (HPA) sent you on 26 November 2009. 
 
The HPA understand that the addition of chlorine and ammonium sulphate to drinking 
water results in the formation of chloramines.  There are British Standards associated 
with both of these chemicals (chlorine BS EN 937:1999, and ammonium sulphate BS 
EN 12123:1999).  We are not aware of a British Standard for Chloramine as it is not 
directly added to drinking water. 
 
As explained in our previous reply, we do not hold information on these British 
Standards.  We suggest you direct your enquiries on the regulatory framework for 
water disinfection to the Drinking Water Inspectorate. 
 
I hope you have found this information useful, however, if you are dissatisfied with 
this response and would like a copy of the HPA complaints procedure then please 
contact Mr George Stafford, Complaints Manager at: Health Protection Agency, 61 
Colindale Avenue, London NW9 5EQ. 
 
Please note that you have the right to an independent review by the Information 
Commissioner’s Office if a complaint cannot be resolved through the HPA complaints 
procedure. The Information Commissioner’s Office can be contacted by writing to 
Information Commissioner’s Office, Wycliffe House, Water Lane, Wilmslow, Cheshire 
SK9 5AF. 
 
Please contact me if you require any further information or assistance. 
 
Yours sincerely 
Leigh Kelly 
Freedom of Information Officer 
Health Protection Agency 

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