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Information and public services for the Island of Jersey

L'înformâtion et les sèrvices publyis pouor I'Île dé Jèrri

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Water statistics

Jersey Water statistics

Jersey Water supplies water to approximately 40,000 homes and businesses from two water treatment works.

In 2017, Jersey Water supplied 7.3 billion litres through a 582 km network of water mains.

Jersey’s water resources are nearly all derived from rainfall dependent surface waters.

Jersey Water collects and stores raw (untreated) water in six storage reservoirs with a capacity of 2,687 million litres, which is equivalent to approximately 120 days of average demand.

Water connections and demand from 2012 to 2017

2012 2013 2014 20152016
2017​
Total water supplied (millions of litres)7,0157,0477,0807,2947,567​7,327​
Maximum daily demand (millions of litres)23.424.824.025.025.6​25.9​
Annual rainfall (mm)1,0899391,045964986​1,027​
New mains laid (km)1.51.51.60.22.3​1.9​
Mains re-laid / relined (km)2.12.53.52.52.0​2.1​
Number of new connections349406403506374​303​


 

Water consumption in Jersey


Source: Jersey Water, download the chart data

Jersey Water website 

Bathing water quality

You can find sea water quality results for 2017 and a summary of the 2016 results by following the link below.

Sea water monitoring

Water pollution incidents

Water pollution incidents are reported to Environmental Protection through the pollution hotline

In 2017:

  • 101 water pollution incidents were reported
  • the number of reported incidents increased by 5% compared to 2016
  • reported incidents were 8% below the recent long-term average (2006 to 2017)

Environmental Protection are continuing to try and reduce the number of incidents through its pollution prevention campaigns and public engagement.

Total number of reported pollution incidents

Source: States of Jersey Department of the Environment, download chart data

 

In 2017, oil incidents were the most frequently reported water pollution incidents (39%). 

Unsubstantiated incidents are incidents that either did not involve water pollution or did not present a risk of pollution. However, they are included in the data as Environmental Protection’s resources were used.

Reported water pollution incidents by type

Source: States of Jersey Department of the Environment, download chart data

 

Enforcement action is taken in accordance with Environmental Protection’s enforcement policy. 

For 44% of reported incidents no formal enforcement action can be taken because there is no contravention of the Water Pollution Law, evidence of pollution or an offender cannot be identified. 

Enforcement action taken in accordance with the Water Pollution (Jersey) Law 2000

Source: States of Jersey Department of the Environment, download chart data

 

Water pollution hotline

Water abstractions

Water abstraction licenses and registrations

The Water Resources (Jersey) Law 2007 came into force on 1 January 2010. 

The law requires that all water abstractions that exceed 15 cubic metres in any 24 hour period must be licensed. This includes:

  • abstractions from surface sources (streams, reservoirs etc.)
  • abstractions from sub-surface (groundwater) sources such as wells and boreholes

All abstractions for domestic purposes (irrespective of quantity) are exempt from licensing but must be registered.

Abstractions from sub-surface sources for non-domestic purposes that are less than the above quantity must be registered.

Private water abstractions

An estimated 515,700 cubic metres (about 113.4 million gallons) of water is abstracted for domestic household requirements from private sources.

Around 9% of the population get their household water supply from private sources (boreholes, wells and springs).

The majority of registered water abstractions provide a domestic supply to a single property.

Number of households and people supplied by registered or licensed private water supplies (boreholes, wells and surface water) for drinking water in April 2019

Parish Households People
Grouville242
648
St Brelade
118
326
St Clement27
80
St Helier153
518
St John301
812
St Lawrence331
906
St Martin453
1,289
St Mary148
426
St Ouen490
1,344
St Peter407
1,074
St Saviour256
740
Trinity467
1,257
Total3,393 9,420

Private water supplies: registration and licenses

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