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 as laid out in their Information letters.  The specification for Private Water supplies is covered by DWI Information Letter: IL 4/2013 (Private Water Supplies); and the specification for Compliance data is covered by IL 6/2003 (Compliance Data).   

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