Anglian Water Services Limited
Overall Water Quality supplied by Anglian Water in 2000
A total of 208,630 tests were carried out by Anglian Water in 2000. Of these tests, 99.63% complied with the Regulations.
Company Information Amount of Water Supplied: 1,200 Ml/d Consumers Supplied: 4 million Areas of Supply: East Anglia, Lincolnshire, Bedfordshire, Northamptonshire, and parts of Essex, Buckinghamshire and Nottinghamshire Water Composition: 50% from rivers and reservoirs
50% from boreholes and aquifersTreatment Works: 139 Service Reservoirs: 380 Km of Mains: 35,233 Water Supply Zones: 189 Water Quality in Water Supply Zones, at Treatment Works, and in Service Reservoirs
Water supply zones
- In general, to be wholesome, water must comply with the standards set out in the Regulations. The Company carried out a total of 138,166 tests on samples taken in its 189 water supply zones. The table below includes only the parameters that breached the standard. All other parameters fully complied with the standards. Parameter meanings 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 to carry out remedial works to overcome the difficulty in meeting the individual standard.
Parameter
Total samples taken
Samples not meeting the standard
Percentage
Number of failures already covered by undertakings
Total coliforms
13,325
38
0.29
-
Faecal coliforms
13,325
5
0.04
-
Turbidity
9,194
3
0.03
1
Odour
832
1
0.12
-
Taste
821
1
0.12
-
Nitrate
3,512
7
0.20
-
Nitrite
4,777
626
13.10
-
Iron
5,406
24
0.44
21
PAH
455
27
5.93
19
Ammonium
2,579
1
0.04
-
Copper
983
1
0.10
-
Phosphorus
3,480
1
0.03
-
Total hardness
229
2
0.87
-
Treatment works
Of the Company’s 139 treatment works, 132 (95%) complied fully with the relevant standards. Contraventions at the other seven were considered trivial and unlikely to recur. Differences over the last three years in the number of treatment works, and samples from treatment works, in which coliforms were detected are not considered significant. Service reservoirs
Failure of the standard for faecal coliforms at one service reservoir was considered trivial and unlikely to recur. There has been a significant decrease since 1999 in the number of service reservoirs, and samples from service reservoirs, in which faecal coliforms were detected. All other differences were not considered significant.
- At all of the Company's 380 service reservoirs, coliforms were absent from at least 95% of samples.
Company Audit and Inspection Link to expanded information (web site version)
- The Company was inspected or audited by DWI or its appointed consultants on five occasions in 2000. Where relevant, report summaries are available in the ‘Business and Technical’ section of DWI’s web site under ‘Audit and Inspection’.
Title
Date
Annual assessment of 1999 compliance data.
April / May
Audit of plumbosolvency treatment and control programs of work
November
Audit trails of five samples
November
Follow-up of response to recommendations and inspection of service reservoirs
November
Inspection of distribution system improvement programme progress.
Ongoing
No major deficiencies were identified but a number of recommendations were made. Incidents
- The Inspectorate regarded 18 of the events notified during 2000 by the Company as incidents in which drinking water quality demonstrably deteriorated.
- Fifteen of the incidents have been assessed by DWI. Each was of short duration and the Company has taken appropriate remedial action. Eight recommendations were made to the Company, mainly regarding operations and procedures.
- During 2000, assessment was also completed for one incident which occurred in 1999.
Three incident assessments remain under consideration.
Nature of Incident
No. of Incidents
Assessment by DWI Completed
Areas Affected
Supply of discoloured water
12
Yes
Harleston, Downham Market (March); Harleston (June); Long Stratton, Halstead (July); Harleston (August); Donnington, Hadleigh (September); Corby, Harleston (October); Moulton, Grantham (November).
2
No
Skegness (February); Meppershall (August);
Wholesomeness concern following burst main
2
Yes
Daventry (October); Welton (November)
Supply of water with taste and odour
1
Yes
Beetley (January)
Wholesomeness concern following raw water deterioration
1
No
Lincoln (November)
Improvement Programmes
Carried Out by the Company
- No remedial programmes were due for full completion during 2000.
- The ongoing distribution system improvement programmes due for completion in 2002, which have been implemented by the Company, have been progressing satisfactorily.
Enforcement Action
- The table below indicates areas where DWI is considering, or has taken enforcement action for, breaches of regulations.
Parameter/Area
Number
Regulation Breached
Iron
1 zone
Regulation 3(3)c
Nitrate
1 zone
Regulation 3(3)c
