PLANNING AND ENVIRONMENT DEPARTMENT
ENVIRONMENT DIVISION
WATER (JERSEY) LAW 1972
ARTICLE 10 – DUTY TO MONITOR
(Public)
Purpose of the Report
The Minister for Planning and Environment (The Minister) is requested to approve the proposed monitoring programme of treated water for 2009 that was submitted by The Jersey New Waterworks Company Limited (Jersey Water).
Background
Under Article 10(4) of the Water (Jersey) Law 1972 as Amended, Jersey Water is required to submit its monitoring programme for treated water each year for the approval by The Minister.
Under Article 10(5) the monitoring programme should be submitted for approval by 1 July in the year immediately preceding the one in which the monitoring programme is to apply.
Discussion
Jersey Water submitted details of its monitoring programme for the calendar year 2009 on 11 April 2008 for the approval of The Minister (see Annex 1).
The monitoring programme has been reviewed by the Planning and Environment Department and is deemed fit for purpose.
The monitoring programme is based on best practice in England and Wales in accordance with The Water Supply (Water Quality) Regulations 2000 (England and Wales).
A copy of the proposed monitoring schedule for 2009 is attached to this report.
Recommendation
- The Minister approves the proposed monitoring programme submitted by Jersey Water for the calendar year 2009.
ii. Notify Jersey Water confirming approval of the monitoring programme for 2009.
Written by: Dr Tim du Feu, Head of Water Resources, Environment Division
Approved by: Chris Newton, Director of Environment
Attachments:
Monitoring programme- Jersey Water
Ministerial Decision ref: MD-PE-2008-0249
11 November 2008
Annex 1. Proposed Regulatory Monitoring Programme
for the Year 2009
Water Supply Zones
The sampling frequencies set out in The Water Supply (Water Quality) Regulations 2000 (England and Wales) are based on the population size of the zone. The estimated population of the Island is 90,800 (as at Dec. 2007) and the Company supplies approximately 90%; therefore the population supplied is approximately 81,500.
For the purposes of the setting the sampling frequencies, the population size will be taken as 100,000 and the Island taken as one supply zone.
Table 2 in schedule 3 of the Regulations sets out the frequency of sampling the water supply zones as listed below. The proposed sampling frequency per zone is highlighted in bold.
Table 2
Check monitoring | Parameter | Population size | Reduced | Standard | E.coli | <100 *100 | | 4 12 per 5,000 population i.e. 240 | Coliform bacteria | Residual disinfectant | Aluminium | <100 100-4,999 5,000-9,999 10,000-29,999 30,000-49,999 50,000-79,999 80,000-100,000 | 1 2 6 12 18 26 38 | 2 4 12 24 36 52 76 | Ammonium | Clostridium perfringens (including spores) | Colony counts | Colour | Conductivity | Hydrogen ion | Iron | Manganese | Nitrate | Nitrite | Odour | Taste | Turbidity |
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Table 2 (cont’d)
Audit monitoring | Parameter | Population size | Reduced | Standard | Aluminium | <100 100-4,999 5,000-100,000 | | 1 4 8 | Antimony | Arsenic | Benzene | Benzo(a)pyrene | Boron | Cadmium | Chromium | Copper | Cyanide | 1,2 dichloroethane | Enterococci | Fluoride | Iron | Lead | Manganese | Mercury | Nickel | Nitrate | Nitrite | Pesticides and related products | Polycyclic aromatic hydrocarbons | Selenium | Sodium | Trichloroethene | Tetrachloromethane | Trihalomethanes | Chloride | Sulphate | Total organic carbon | Tritium | Gross alpha | Gross beta |
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The Company uses aluminium sulphate as a flocculant in the primary treatment process, therefore the sample frequency for aluminium will be at the check monitoring frequency.
As the water the Company uses originates from, or is influenced by, surface waters, the sampling frequency for iron, manganese and Clostridium perfringens (including spores) will be at the check monitoring frequency.
The Company uses the chloramination disinfection process, therefore the sampling frequency for nitrate and nitrite will be at the check monitoring frequency.
Treatment Works and Supply Points
The Company has two water treatment works located at Augres WTW and Handois WTW. Both treatment works use clarifiers (chemical assisted sedimentation) for primary treatment, followed by rapid gravity filtration using dual media (anthracite and sand). During 2007 Augres WTW supplied an average of 9,216 m3/d and Handois WTW 10,464 m3/d.
The Company has treated water service reservoirs (SR) at Westmount Road, St. Helier (9 Ml capacity) and Les Platons, Trinity (9 Ml capacity).
For the purpose of the monitoring regulations, Augres WTW and Handois WTW will be referred to as treatment works and all of the above sites (Augres WTW, Handois WTW, Westmount SR and Les Platons SR) will count as supply points.
Table 3 in schedule 3 of the Regulations sets out the frequency of sampling the treatment works or supply points as listed below. The proposed sampling frequencies are highlighted in bold.
Table 3
Item no | Substances and parameters | Volume of water supplied m3/d | Reduced | Standard | 1 | E.coli | <20 20-1,999 2,000-5,999 6,000-11,999 >12,000 |
12 52 104 104 | 4 52 104 208 365 | 2 | Coliform bacteria | 3 | Colony counts | 4 | Nitrite | 5 | Residual disinfectant | 6 | Turbidity | Subject to check monitoring | 7 | Clostridium perfringens | 10,000-15,999 16,000-32,999 | 26 52 | 52 104 | 8 | Conductivity | Subject to audit monitoring | 9 | Benzene | <20 20-999 1,000-49,999 50,000-89,999 90,000-299,999 300,000-649,999 *650,000 | | 1 4 8 12 24 36 48 | 10 | Boron | 11 | Bromate | 12 | Cyanide | 13 | 1,2 dichloroethane | 14 | Fluoride | 15 | Mercury | 16 | Nitrite | 17 | Pesticides and related products | 18 | Trichloroethene } Tetrachloroethene } | 19 | Tetrachloromethane | 20 | Chloride | 21 | Sulphate | 22 | Total organic carbon | 23 | Tritium | 24 | Gross alpha | 25 | Gross beta |
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Parameters labelled as items 1 to 6 for sampling at the treatment works only.
Parameters labelled as items 7 to 25 are for sampling at supply points.
The Company uses the chloramination disinfection process, therefore the sampling frequency for nitrite will be at the check monitoring frequency as listed under item 4 in table 3.
As the water the Company uses originates from, or is influenced by, surface waters, Clostridium perfringens (including spores) will be sampled as part of the check monitoring in supply points.
The Company does not add sodium hypochlorite after the water has left the treatment works, therefore audit monitoring for bromate (a possible disinfection by-product) shall take place at the supply points.
All check monitoring will take place at the standard frequency as indicated in the above tables, with one exception if it is granted. The exception the Company would like to apply for is the frequency for nitrite monitoring at treatment works to be at the reduced rate. Results for the last two years have been below the EU regulatory limit of 0.1 mg/l, the highest result being 0.014 mg/l.
It is proposed that analysis for the parameters given in the monitoring schedules will be undertaken by either the Company laboratory or their consulting analysts.
Pesticides analysed for at the supply points and in the supply zone
Phenoxyalkanoic Acid Herbicides Oxynil Herbicides
Pentachlorophenol (PCP) 2,4-D.B. Bromoxynil
M.C.P.A. Chlorthal Ioxynil
2,4-D Triclopyr
Mecoprop Dichlorprop Triazole
2,4,5-Trichlorophenoxyacetic acid Dicamba
2,3,6-Trichlorobenzoic acid M.C.P.B Propiconazole
Tebuconazole
Urea Herbicides Triazines
Chlortoluron Isoproturon Atrazine Simazine
Linuron Diuron Prometryn Propazine
Carbetamide Monolinuron Trietazine Terbutryn
Methabenzthiazuron Terbuthylazine Cyanazine
Organochlorine Pesticides Organophosphorous
Pesticides
Aldrin Endrin Dieldrin Carbophenothion
Isodrin HCH Alpha HCH Beta Malathion
HCH Gamma HCH Delta HCH Epsilon Chlorfenvinphos
DDT o,p’ DDT p,p’ DDE o,p’ Azinphosmethyl
DDE p,p’ DDD o,p’(TDE o,p’) DDD p,p’ (TDE p,p’) Mevinphos
PCB 28 PCB 52 PCB 101 Demeton-S-Methyl
PCB 118 PCB 138 PCB 153 Triazophos
PCB 180 Hexachlorobenzene Hexachlorobutadiene Chlorpyriphos
Heptachlor Heptachlor Epoxide Endosulphan Parathion-Ethyl
Chlordane Tecnazene Trifluralin Dimethoate
Methoxychlor Diflufenican Dalapon Pirimephosmethyl
Disulfoton Mecarbam
Fenitrothion
Dichlorvos
Diazinon
Heptenophos
Propetamphos
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