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

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Sea water monitoring

2022 monitoring calendar and results

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Source: Natural Environment

cfu = colony forming units

< = is less than the given value

Results from Jersey are submitted to the Marine Conservation Society for inclusion in the UK Good Beach Guide.

The above ratings are a weekly snapshot of bathing water quality, however, the full classification is calculated annually for each bathing water site, based on all of the samples from the previous four years.

Excellent Water Quality 3 Stars

Excellent Water Quality: Indicates this sample meets the following standard:

less than or equal to 250 Escherichia coli per 100ml

less than or equal to 100 Intestinal enterococci per 100ml​

​​Good Water Quality 3 Stars

​Good Water Quality: Indicates this sample meets the following standard:

less than or equal to 500 Escherichia coli per 100ml

less than or equal to 200 Intestinal enterococci per 100ml

Poor Water Quality 3 StarsPoor water indicates values are above 500 Escherichia coli per 100ml and above 200 Intestinal enterococci per 100ml​

We monitor sea water as part of the Bathing Water Directive.

The quality of sea water around Jersey's coast is important for a number of reasons:

  • the health of the public swimming in those bays and for those involved in water sports
  • detection of pollution within the environment
  • providing information to the aquaculture industry, for example oyster or mussel farming

Jersey prides itself on having some of the cleanest beaches in Europe.  Results from Jersey are submitted to the Marine Conservation Society for inclusion in the UK Good Beach Guide

2022 Sea water monitoring schedule

The 2022 season runs from Tuesday 18 May to Wednesday 27 September, with the most recent results reported in the table at the top of this page.

May14 and 15 May 2022
May23 and 24 May 2022
May30 and 31 May 2022
June06 and 07 June 2022
June14 and 15 June 2022
June20 and 21 June 2022
27 and 28 June 2022
July04 and 05 July 2022
July11 and 12 July 2022
July18 and 19 July 2022
July25 and 26 July 2022
August03 and 04 August 2022
08 and 09 August 2022
15 and 16 August 2022
August22 and 23 August 2022
30 and 31 August 2022
September05 and 06 September 2022
September12 and 13 September 2022
September19 and 20 September 2022
​26 and 27 September 2022

The sixteen bays around Jersey monitored include:

  • St Brelade Bay
  • Beauport
  • Portelet
  • Le Braye
  • Plémont
  • Greve de Lecq
  • Watersplash
  • Bonne Nuit
  • La Haule
  • Victoria Pool
  • Grouville
  • Archirondel
  • Havre des Pas
  • Green Island
  • Bouley Bay
  • Rozel

For ensuring accuracy and consistency a duplicate sample and analysis is carried out each week by the Official Analysts laboratory.

​​​​Quality of sea water

The sampling of sea water is carried out by officers from Natural Environment Department based at Howard Davis Farm, Telephone +44 (0) 1534 441600. If you observe pollution on the beach or in the sea, please call the Pollution hotline on +44 (0) 1534 709535.

Sea water profiles

A profile has been produced for 14 of Jersey's monitored sea waters. Each profile includes:

  • a photograph, description, map of the sea water and surrounding area
  • an identification of potential sources of pollution and measures to reduce pollution
  • the telephone number to report water pollution and contact details for further information
ArchirondelLa Haule
Beauport Le Braye
Bouley BayPlémont
Green IslandPortelet
Greve de LecqSt Brelade's Bay
GrouvilleVictoria Pool
Havre des PasWatersplash

When did sea water quality monitoring begin?

Monitoring started in 1992. We now classify our beaches following guidance from the European Directive and by the World Health Organisation.

From 2015 bathing water classifications throughout Europe are based on sampling data collected over 4 years.

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