Analytical Services

Private water samples should be collected, transported and tested within the scope of accreditation; further details about these requirements can be found in information letter 05/2013 which, amongst other things, state that the minimum regulatory requirement is for all sampling, transport and analysis of drinking water, supplied under these Regulations, to be UKAS accredited under ISO/IEC 17025 to the Drinking Water Testing specification (DWTS).

A list of companies including laboratories that are UKAS accredited under ISO/IEC 17025 to the Drinking Water Testing specification (DWTS) and therefore approved to carry out drinking water sampling, transportation and analysis under these Regulations can be found below. The companies and laboratories listed here may be accredited for some but not all drinking water tests and services.  All drinking water test results and other services, such as sampling and transportation, should be accredited including when subcontracted.

The revision to the agreement between DWI and UKAS forms the basis of the UKAS Drinking Water Testing Specification (Lab 37) which is available on the UKAS website.

The nearest DWTS accredited company can be found by following this link to the UKAS website.

Details of radioactivity drinking water analysis laboratories are available and will be updated with additional information/laboratories should this become available.

A list of organisations that carrying out drinking water testing, and report private water test results electronically, and compatibly with local authority annual returns; showing their accreditation status for drinking water testing *

Note: Accreditation Status = UKAS No./Sampling/Analysis

Organisation	UKAS No.	Sampling	Analysis	Electronic Reporting in DWI format
Affinity Water Shared Services Ltd	1758	ISO17025 DWTS	ISO17025 DWTS	YES
Latis Scientific	2279		ISO17025	YES
Northumbrian Water Ltd	1181	ISO 17025 DWTS	ISO17025 DWTS	YES
South East Water Ltd trading as South East Water Scientific Services	1579	ISO 17025 DWTS	ISO 17025 DWTS	YES
United Utilities Scientific Services	1494	ISO 17025 DWTS	ISO 17025 DWTS	YES

A list of organisations carrying out drinking water testing; showing their accreditation status for drinking water testing *

Note: Accreditation Status = UKAS No./Sampling/Analysis

Organisation	UKAS No.	Sampling	Analysis	Electronic Reporting **
Aberdeen City Council	1325		ISO17025 DWTS	NO
Agri-Food and Biosciences Institute Northern Ireland	1279		ISO17025 DWTS	NO
ALS Environmental Ltd	1314	ISO17025 DWTS	ISO17025 DWTS	NO
Anchem Laboratories Ltd	0934	Not Accredited for DWTS	Not Accredited for DWTS	NO
Anglian Water Services Ltd	1223	ISO17025	ISO17025 DWTS	NO
Bio-Search (NI) Ltd	1369		ISO17025 DWTS	NO
Derwentside Environmental Testing Services Ltd	2139	ISO17025	ISO17025	NO
Dŵr Cymru Cyfyngedig	7742	ISO17025 DWTS	ISO17025 DWTS	NO
Eclipse Scientific Group Limited trading as ALS Food and Pharmaceutical	1282		ISO17025 DWTS	NO
Environment Agency – Nottingham	0754		ISO17025	NO
Eurofins UK 2016 Ltd	9658		ISO17025	NO
Glasgow City Council	1278		ISO17025 DWTS	NO
Index Microbiology	8229		ISO17025 DWTS	NO
Initial Projects Ltd trading as Enitial	4485	ISO17025		NO
Lancashire County Scienfic Services	0625		ISO17025	NO
LGC Ltd	0003		ISO17025 DWTS	NO
Marine Biological and Chemical Consultants	1562		ISO17025	NO
Mercian Science Ltd	2450		ISO17025	NO
Minton, Treharne and Davies Ltd	0077		ISO17025	NO
Northern Hygiene Laboratories Ltd	1463		ISO17025	NO
Northern Ireland Water	1835		ISO17025 DWTS	NO
Northern Ireland Water	2148		ISO17025 DWTS	NO
Pathology Management Services	1736		ISO17025	NO
Princess Royal Hospital Brighton and Sussex University Hospitals NHS Trust, Environmental Microbiological Unit	1970		ISO17025	NO
Public Health England – Birmingham	1375		ISO17025	NO
Public Health England – Glasgow	1502		ISO17025	NO
Public Health England – London	4063		ISO17025	NO
Public Health England – Preston	1496		ISO17025	NO
Public Health England – Porton	1645		ISO17025	NO
Public Health England – York	2724		ISO17025	NO
Public Health Wales Bangor	1817		ISO17025	NO
Public Health Wales Cardiff	1591		ISO17025	NO
Public Health Wales Microbiology Carmarthenshire	1810		ISO17025	NO
Scientific Analysis Laboratories Ltd	1549		ISO17025	NO
Scottish Water	1565	ISO17025 DWTS	ISO17025 DWTS	NO
Serco Limited	2252	ISO17025 DWTS	ISO17025 DWTS	NO
Severn Trent Water Ltd	1229	ISO17025 DWTS	ISO17025 DWTS	NO
Somerset Scientific Services	0369		ISO17025	NO
South West Water 1361 4591	1361 4591	ISO17025 DWTS	ISO17025 DWTS	NO
Staffordshire Scientific Services	1692		ISO17025	NO
Stansted Laboratories Ltd	2266		ISO17025	NO
Sutton and East Surrey Water plc	0976	ISO17025 DWTS	ISO17025 DWTS	NO
Tayside Scientific Services	1639		ISO17025 DWTS	NO
Thames Water Utilities Ltd – 0677 1572	0677 1572	ISO17025 DWTS	ISO17025 DWTS	NO
The City of Edinburgh Council	1005		ISO17025 DWTS	NO
Wessex Water Scientific Centre	0905	ISO17025 DWTS	ISO17025 DWTS	NO
Worcestershire Scientific Services	0627	Not Accredited for DWTS	Not Accredited for DWTS	NO

* Please contact dwi.enquiries@defra.gov.uk if your test laboratory should be included, or the information needs updating, quoting the UKAS accreditation number.

** The ‘Electronic Reporting’ refers to producing data in the format for the DWI specifications. For more information see here.