9 Folkestone and Dover Water Services Limited
Overall Water Quality supplied by Folkestone and Dover Water Services Limited in 2001
- A total of 7,401 tests were carried out by Folkestone and Dover Water Services Limited in 2001.
- Of these tests, 99.95% complied with the Regulations.
Company Information
Amount of Water Supplied: 50 Ml/d
Consumers Supplied: 162,000
Areas of Supply: Coastal strip from Dungeness
to Dover on the Kent coast
Water Composition: 15% from rivers and reservoirs
85% from boreholes and aquifers
Treatment Works: 16
Service Reservoirs: 13
Km of Mains: 1,068
Water Supply Zones: 10Water Quality in Water Supply Zones, at Treatment Works, and in Service Reservoirs
Water supply zones
- To be wholesome, water must comply with the standards set out in the Regulations. The Company carried out a total of 3,305 tests on samples taken in its 10 water supply zones. The table below includes only the parameters that breached the standard; all other parameters were fully compliant. A list of these parameters and their significance can be found at the beginning of this section.
- The last column indicates the number of failures in zones already covered by legally binding undertakings given by the Company. These undertakings required remedial work to be carried out to ensure compliance with the individual standard.
Parameter Total samples taken Samples not meeting the standard Percentage Number of failures already covered by undertakings Total coliforms 600 1 0.17 0 Iron 164 1 0.61 0 Manganese 64 1 1.56 0
Treatment works
- Of the Company's 16 treatment works, 15 (94%) complied fully with the relevant standards. Failures of the standards at one works were considered trivial, or unlikely to recur as a result of remedial action taken by the Company. Differences over the last three years in the number of treatment works, and samples from treatment works, in which coliforms or faecal coliforms were detected, were not significant.
Service reservoirs
- There were no contraventions of the microbiological standards at any of the Company's 13 service reservoirs.
Cryptosporidium
- The Company does not carry out regulatory monitoring for oocysts. However, during 2001, 189 samples were taken for operational purposes from two sites. Very low numbers of oocysts were detected in four (2.12%) samples at one site but the treatment standard was not exceeded.
Company Audit and Inspection
- The Company was inspected or audited by the Inspectorate or its appointed consultants on a number of occasions during 2001. Where relevant, report summaries are available in the 'Business and Technical' section of the web site under 'Audit and Inspection'.
Audit or Inspection Date Audit of incident notification procedures
February Audit trails of ten samples
October
Review of policies and procedures on contaminated land
November Inspection of one water treatment works and one service reservoir
November Audit of procedures for compliance with Regulation 25
November Review of plumbosolvency treatment and control programmes of work
November
Three recommendations were made in respect of action required to avoid the risk of a breach of a regulatory duty. These recommendations were in relation to the audit of service reservoirs and procedures for notification of incidents.
Three recommendations for improvements were made in respect of progress with the distribution system undertaking and plumbosolvency treatment for lead.
Incidents
- The Inspectorate regarded two of the events notified during 2001 by the Company as incidents. For further details on the classification of incidents see Chapter C, 'Events affecting Water Quality', in Part 3.
- Both of the incidents have been assessed by the Inspectorate. They were of short duration and the Company has taken appropriate remedial action. Five recommendations were made to the Company regarding procedures and sampling.
Nature of incident
No. of incidents Assessment completed by DWI Areas affected Supply of discoloured water
1 Yes Parts of the Dungeness Peninsula (June)
Supply of water with taste and odour 1 Yes Parts of the Dungeness Peninsula (July)
Improvement Programmes
- No remedial programmes were due for completion during 2001.
- The ongoing distribution system improvement programme has been progressing satisfactorily. The Company is required to renovate 69 km of mains by 2007.
- The Company has improvement programmes to meet the new and revised standards set down in the new Water Supply (Water Quality) Regulations 2000, which will come into force on 25 December 2003. These relate to arsenic at one site, plus additional work required to meet the new standard for lead. The Company also has programmes of work to further reduce any risk from Cryptosporidium oocysts at three sites. Progress with delivery of the programmes is monitored by the Inspectorate, and has been satisfactory.
Enforcement Action
- No enforcement action was considered for the Company as a result of the Inspectorate's activities during 2001.
table 9.1 Folkestone and Dover Water Services Limited
MICROBIOLOGICAL QUALITY OF WATER LEAVING TREATMENT WORKS2001 2000 1999 Number of water treatment works 16 15 19 Works with no sampling shortfall 16 15 19 COLIFORMS Total number of determinations 1,372 1,234 1,400 - number containing coliforms 1 1 0 - % containing coliforms <0.1 <0.1 0.0 Treatment works with coliforms detected 1 1 0 - % of all works 6.3 6.7 0.0 FAECAL COLIFORMS Total number of determinations 1,372 1,234 1,400 - number containing faecal coliforms 0 1 0 - % containing faecal coliforms 0.0 <0.1 0.0 Treatment works with faecal coliforms detected 0 1 0 - % of all works 0 6.7 0
table 9.2 Folkestone and Dover Water Services Limited
MICROBIOLOGICAL QUALITY OF WATER IN SERVICE RESERVOIRS2001 2000 1999 Number of service reservoirs 13 13 13 Service reservoirs with no sampling shortfall 13 13 13 COLIFORMS Total number of determinations 676 665 675 - number containing coliforms 0 o 1 - % containing coliforms 0.0 0.0 0.2 Service reservoirs with coliforms detected 0 0 1 Service reservoirs with coliforms detected in more than 5% of samples 0 0 0 - % of all service reservoirs 0 0 0 FAECAL COLIFORMS Total number of determinations 676 665 675 - number containing faecal coliforms 0 0 0 - % containing faecal coliforms 0.0 0.0 0.0 Service reservoirs with faecal coliforms detected 0 0 0 - % of all service reservoirs 0 0 0
table 9.3 Folkestone and Dover Water Services Limited
WATER QUALITY IN SUPPLY ZONESColumns 'CBU' show, for determinations, contraventions covered by undertakings and, for zones, the total number of zones covered by undertakings in 2001. Column 'E' shows the number of zones for which new enforcement action is under consideration as a result of contraventions of the PCV in 2001. PARAMETER DETERMINATIONS in 2001 ZONES (10 in 2001)* Total Contravening PCV Non-compliant No. % CBU CBU E Number in: 2001 2001 2000 1999 Coliforms 600 1 0.2 0 0 0 0 0 0 Faecal coliforms 600 0 0.0 0 0 0 0 0 0 Colour 40 0 0.0 0 0 0 0 0 0 Turbidity 140 0 0.0 0 4 0 0 0 0 Odour 46 0 0.0 0 0 0 0 0 0 Taste 46 0 0.0 0 0 0 0 0 0 Hydrogen ion 264 0 0.0 0 0 0 0 0 0 Nitrate 65 0 0.0 0 0 0 0 0 0 Nitrite 62 0 0.0 0 0 0 0 0 0 Aluminium 46 0 0.0 0 0 0 0 0 0 Iron 164 1 0.6 0 4 0 1 0 0 Manganese 64 1 1.6 0 0 0 1 0 0 Lead 25 0 0.0 0 0 0 0 1 0 PAH 50 0 0.0 0 0 0 0 0 1 Trihalomethanes 14 0 0.0 0 0 0 0 0 0 Total pesticides 69 0 0.0 0 0 0 0 0 0 Other pesticides 277 0 0.0 0 0 0 0 0 0 All others 733 0 0.0 0 0 0 0 0 0 TOTAL 3,305 3 <0.1 0 - - - - - *10 zones in 2000; 10 zones in 1999. [ Previous ] [ Contents ] [ Next ]
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Drinking Water Inspectorate,
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Telephone : 020 7944 5956 - Facsimile : 020 7944 5969
E-mail: dwi.enquiries@defra.gsi.gov.uk
Published 10 July 2002
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