DWI

REF

TITLE

Annex

03/2013

Cost recovery: publication of fees (PDF 95KB)

Schedule of fees

02/2013

Service reservoirs (SRs) – summary findings of technical audits of service reservoirs, sampling facilities, security and frequency of sampling between January and November 2012 (PDF 776KB)

N/A

01/2013

The 2014 Periodic Review of prices – Guidance on drinking water quality requirements (PDF 287KB)

N/A

REF

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Annex

09/2012

The Water Industry (Suppliers' Information) Direction 2012 (PDF 137KB)

Annex (PDF 196KB)
Annex B (PDF 60KB)
(Data specification)

08/2012

Outline of the Drinking Water Inspectorate cost recovery regime (PDF 112KB)

N/A

07/2012

Publication of further research on nitrosamines in water treatment coagulants and drinking water (PDF 102KB)

N/A

06/2012

Regulation 15 compliance arrangements (PDF 180KB)

N/A

05/2012

Collection of data under the Private Water Supplies Regulations 2009 and the Private Water Supplies (Wales) Regulations 2010 (PDF 88KB)

Annex 1 (excel 327KB)
Annex 2 (excel 396KB)
Annex 3 (PDF 231KB)
Annex 4 (PDF 54KB)

04/2012

Water supply hygiene – summary findings of technical audits of distribution depots and associated network operations between July and November 2011 (PDF 144KB)

N/A

03/2012

Publication of research report on human pharmaceuticals in raw and treated river water to inform regulatory risk assessment methodology (PDF 96KB)

Link to report

02/2012

Arrangements for demonstrating that the laboratory analysis of samples of drinking water and the associated reporting of analytical results meet regulatory requirements (PDF 111KB)

N/A

01/2012

Update of the Inspectorate’s structure (PDF 143KB)

A (JPG 421KB)
B (PDF 22KB) - both updated January 2013

REF

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Annex

10/2011

Guidance to local authorities in England on charging arrangements under the Private Water Supplies Regulations 2009

10a/2011 - sent to local authorities in England that have private water supplies and sent a data return to DWI for 2010 (PDF 92KB)
10b/2011 - sent to local authorities in England that have no private water supplies or did not send a data return to DWI for 2010 (PDF 92KB)
10c/2011 - sent to local authorities in Wales for information (PDF 93KB)

N/A

08/2011

Publication of report: Objectionable taste and odour in water supplies in North-East London between January and March 2010 (PDF 91KB)

Report
(PDF 1.6MB)

07/2011

Implementation of the new SCA blue book 233: The determination of taste and odour in drinking waters (2010) (PDF 50KB)

N/A

06/2011

Technical Audit of Water Companies under Section 86 of the Water Industry Act 1991: Publication of the report following the audit of STS Analytical Services at Bridgend (PDF 94KB)

A (PDF 513KB)

05/2011

Production, delivery, receipt and control of water treatment chemicals (PDF 101KB)

N/A

04/2011

Guidance on the general provisions for monitoring of parameters relevant to radioactivity (PDF 106KB)

N/A

03/2011

Publication of World Health Organisation (WHO) document entitled 'Water safety in buildings' (PDF 80KB)

N/A

02/2011

DWI Enforcement Policy (PDF 88KB)

A (PDF 169KB)

01/2011

Amendment to The Water Supply (Water Quality) Regulations 2010 (Wales) (PDF 92KB)

N/A

REF

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Annex

13/2010

Collection of data under the Private Water Supplies Regulations 2009 (PDF 99KB)

Please see IL 09/2011

11/2010

Guidance to local authorities in England on charging arrangements under the Private Water Supplies Regulation 2009 (PDF 106KB)

A (PDF 702KB)
B (PDF 55KB)

10/2010

Guidance on using contractors to deliver Local Authority duties under the Private Water Supplies Regulations (PDF 113KB)

N/A

09/2010

Revised DWI Guidance on the Water Supply (Water Quality) Regulations (PDF 153KB)

1 (PDF 896KB)
2 (PDF 1.29MB)
3 (PDF 251KB)
4 (PDF 1.29MB)

08/2010

Changes to the process for assessment of drinking water quality event notifications (PDF 93KB)

N/A

07/2010

Drinking water quality improvement programmes - process for reporting on, agreeing changes to and closure of improvement programmes (PDF 120KB)

1 (Word 56KB)
2 (Word 66KB)
3 (Word 53KB)
4 (Word 44KB)
5 (Word 51KB)
6 (Word 47KB)

06/2010

Consultation on update DWI guidance on the Water Supply (Water Quality) Regulations (PDF 116KB)

A (PDF 1.4MB)

04/2010

New drinking water quality legislation (2010) (PDF 247KB)

A (PDF 69KB)
B (PDF 251KB)
C (PDF 48KB)

03/2010

Better Regulation Executive : Report on the Hampton implementation review of the Drinking Water Inspectorate (PDF 76KB)

N/A

02/2010

Revision of guidance on the regulatory responsibilities of new (inset) appointees in relation to public water supplies (PDF 76KB)

A (282KB)

01/2010

Guidance on the use of ultraviolet (UV) irradiation for the disinfection of public water supplies (PDF 75KB)

A (181KB)

REF

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Annex

10/2009

Revision of guidance on the water supply (water quality) regulations 2000/2001 specific to PFOS (perfluorooctane sulphonate) and PFOA (perfluorooctanoic acid) concentrations in drinking water (PDF 140KB)

A (5MB)

9/2009

Drinking water safety - Guidance to health and water professionals (PDF 140KB)

A (5MB)

8/2009

Reappointment of Chief Drinking Water Inspector and further update on the restructuring of the Drinking Water Inspectorate (PDF 93KB)

For up to date cascade list see Info letter 01/2012

5/2009

Guidance on the reporting and investigation of taste and odour detections (PDF 159KB)

N/A

4/2009

Submission of raw water monitoring data to the Drinking Water Inspectorate (PDF 138KB)

A (PDF 34KB)
B (PDF 369KB)
B (excel 111KB)
Updated Dec '12

3/2009

Further guidance on changes within the operations team and the inspector liaison role (PDF 141KB)

N/A

2/2009

Changes to the process for assessment of drinking water quality event notifications (PDF 101KB)

N/A

REF

TITLE

Annex

10/2008

Guidance on the Water Supply (Water Quality) Regulations 2000 (England) & 2001 (Wales) incorporating the Water Supply (Water Quality) (Amendment) Regulations 2007 (PDF 85KB)

A (PDF 827KB)

09/2008

Publication of research report on N-Nitrosodimethylamine (NDMA) in drinking water and associated guidance to the industry (PDF 80KB)

N/A

08/2008

Changes to the approval of disinfectants for emergency use (PDF 93KB)

N/A

07/2008  

Guidance on the requirement to submit a risk assessment under regulations 27 and 28 of the Water Supply (Water Quality) Regulations 2000 (2001 in Wales) (Amendment) Regulations 2007 (PDF 93KB)

A (PDF 123KB)

06/2008 

Audit of Regulations 35(1) (PDF 69KB)

1 (PDF 1.5MB)

05/2008 

Concessionary supplies - further guidance (PDF 109KB)

N/A

04/2008 

Regulation 31 (PDF 101KB)

N/A

03/2008

Guidance on the notification of events (PDF 81KB)

N/A

01/2008 

The Water Supply (Water Quality) Regulations 2000 as amended - Publication of an unofficial consolidated version of the Regulations (PDF 129KB)

N/A

REF

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Annex

10/2007 

Updated guidance on the notification of events (PDF 71KB)

N/A

09/2007 

The Water Supply (Water Quality) Regulations 2000 (Amendment) Regulations 2007 - Changes to water company data tables (PDF 299KB)

N/A

08/2007 

Guidance on interpretation of Regulation 16(2)(d)(i) of the Water Supply (Water Quality) Regulations 2000 (2001 in Wales) (PDF 87KB)

A (PDF 130KB)

07/2007 

Outcome of the consultation exercise on amendment to the Water Supply (Water Quality) Regulations 2000 - Publication of the amendment regulations and the government response to the consultation (PDF 126KB)

N/A

06/2007 

Outcome of the consultation exercise on amendment to the Water Supply (Water Quality) Regulations 2000 - Requirements for raw water monitoring (PDF 89KB)

N/A

05/2007  

Guidance on the Water Supply (Water Quality) Regulations 2000/2001 specific to PFOS (Perfluorooctane Sulphonate) AND PFOA (Perflourooctanoic Acid) concentrations in drinking water (PDF 79KB)

N/A

01/2007  

Technical audit of Water Companies under section 86 of the Water Industry Act 1991: Summary report for the vertical audits for pesticide parameters (PDF 72KB)

A (PDF 249KB)

REF

TITLE

Annex

11/2006

Technical Audit of Water Companies under section 86 of the Water Industry Act 1991: Summary report for the vertical audits for non-microbiological parameters, 2005 (PDF 102KB)

N/A

10/2006 

Cryptosporidiosis in England and Wales (PDF 98KB)

A (PDF 14KB)
B (PDF 27KB)

06/2006

DWI Drinking Water Quality Improvement Programmes - Process for agreeing changes to improvement programmes associated with legal instruments (PDF 164KB)

N/A

05/2006 

Control of Water Treatment Chemicals (PDF 86KB)

N/A

03/2006 

Issues relating to 2006 monthly data submissions to the Drinking Water Inspectorate, and information required for inclusion in the chief Inspector's Report (PDF 260KB)

N/A

02/2006 

Concessionary Supplies: Reporting of compliance results and the calculation of Operational Performance Indices (PDF 81KB)

N/A

01/2006 

Annual Provision of Information on Consumer Contacts (PDF 172KB)

A (PDF 67KB)

REF

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Annex

17/2005

Cryptosporidiosis in England and Wales (PDF 141KB)

N/A

15/2005

Distribution Operation and Maintenance Strategies (DOMS) - Update to DWI requirements and expectations (PDF 29KB)

N/A

14/2005

List of water treatment works in England and Wales (PDF 75KB)

A (PDF 279KB)

12/2005

Guidance on sample and sample extract stability trials and the preservation and preparation of samples for metals analysis (PDF 135KB)

A (PDF 169KB)
B (PDF 102KB)
C (PDF 10KB)

08/2005

Technical audit of water companies under Section 86 of the Water Industry Act 1991: Summary report for the vertical audits for non microbiological parameters, 2004 (PDF 107KB)

A (PDF 269KB)

05/2005

Code of Practice on technical aspects of Fluoridation of water supplies 2005 (PDF 77KB)

A (PDF 64KB)

03/2005

Guidance on the calibration and analytical quality control for residual chlorine measurements (PDF 76KB)

A (PDF 169KB)

02/2005

Issues relating to the submission of sample data to the Drinking Water Inspectorate (PDF 204KB)

N/A

01/2005

Requirements for monitoring radioactivity in water supplies (PDF 85KB)

N/A

REF

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Annex

13/2004

Common Carriage: Guidance on the drinking water quality aspects (PDF 82KB)

A (PDF 214KB)

11/2004

Information requirements following notification of an exceedence of a regulatory standard (PDF 80KB)

A (PDF 70KB)
B (PDF 104KB)

10/2004

Monitoring drinking water at establishments where water is supplied to the public (PDF 91KB)

A (PDF 37KB)

05/2004

Commencement of Part 3 Provisions of Water Act 2003 (PDF 82KB)

N/A

04/2004

Water Supply (Water Quality) Regulations 2000: Report on the results of the survey of analytical performance for the measurement of lead (PDF 128KB)

N/A

REF

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Annex

18/2003

Monitoring for conservative parameters in water supply zones supplied by bulk supplies of treated water (PDF 86KB)

A (PDF 98KB)

17/2003

Section 19 Undertakings continuing beyond 31 December 2003 and the frequency of monitoring requirements (PDF 98KB)

N/A

16/2003

The Water Supply (Water Quality) Regulations 2000 and the Water Supply (Water Quality) Regulations 2001 - Monitoring for Clostridium perfringens (including spores) (PDF 139KB)

N/A

12/2003

Procedures for the Delivery of Water Treatment Chemicals (PDF 82KB)

N/A

09/2003

Authorised and Automatic Supply Point Authorisations (PDF 46KB)

1 (PDF 86KB)
2 (PDF 89KB)
3 (PDF 64KB)
4 (PDF 74KB)

06/2003

The Water Undertakers (Information) Direction 2003 - Format for provision of certain information (PDF 88KB)

A (PDF 40KB)
B (PDF 115KB)
C (PDF 369KB) Updated Dec '12

03/2003

Water Supply (Water Quality) Regulations 2000 - Authorised Departures under Regulations 42 and 20 (PDF 88KB)

A (PDF 50KB)

REF

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Annex

15/2002

Distribution Operation and Maintenance Strategies (DOMS) - DWI Requirements and Expectations (PDF 175KB)

A (PDF 141KB)

03/2002

Cryptosporidium in water supplies: guidance on low-pressure membrane integrity monitoring (PDF 99KB)

A (PDF 34KB)

REF

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Annex

13/2001

Water Supply (Water Quality) (Amendment) Regulations 2001 (SI 2001/2885)  (PDF 23KB)

N/A

11/2001

The Water Supply (Water Quality) (Amendment) Regulations 1999: Cryptosporidium in Water Supplies - Listing of products capable of removing or retaining particles greater than 1 micron diameter (PDF 113KB)

N/A

03/2001

Further Guidance on Requirements to Meet New Lead Standards (PDF 231KB)

N/A

02/2001

Water Supply (Water Quality) Regulations 1989: Guidelines for Calibration in Laboratories (PDF 251KB)

N/A

01/2001

Radon and Uranium in Drinking Water Supplies (PDF 98KB)

A (PDF 104KB)
B (PDF 42KB)
C (PDF 103KB)

REF

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Annex

16/2000

Review of procedures for operation and maintenance of the distribution network (PDF 77KB)

1 (PDF 17KB)
2 (PDF 50KB)
3 (PDF 19KB)
4 (PDF 18KB)
5 (PDF 15KB)
6 (PDF 16KB)
7 (PDF 23KB)
8 (PDF 14KB)
9 (PDF 14KB)
10 (PDF 18KB)
11 (PDF 12KB)
12 (PDF 14KB)

09/2000

Distribution System Undertakings: Investigations, Pre- and Post-Renovation Assessment (PPRA) and New Undertakings (PDF 89KB)

A (PDF 120KB)
B (PDF 63KB)

REF

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Annex

18/1999

Further guidance on analytical quality control (AQC) and analytical reporting limits (PDF 81KB)

A (PDF 157KB)

REF

TITLE

Annex

14/1998

Disinfection After Mains Bursts and Repairs and Other Mains Activities (PDF 24KB)

N/A

REF

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Annex

15/1997

S19 distribution system undertakings: customer questionnaires for assessing discoloured water problems (PDF 41KB)

N/A

13/1997

Incidents involving discoloured or 'dirty' water supplies (PDF 36KB)

N/A

REF

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Annex

04/1996

Monitoring of distribution system undertakings (PDF 66KB)

N/A