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Sea water monitoring

2019 monitoring calendar and results

Article 3(1) of the revised Bathing Water Directive requires sea waters to be identified on an annual basis. The length of the sea water season is to be defined each year.

The 2019 season runs from Monday 13 May until Tuesday 24 September.

It is also a requirement to establish a monitoring calendar to identify days when water samples will be collected.

In addition to those beaches identified within the Bathing Water Directive we have added Bonne Nuit Bay to the 2019 sampling regime.

Jersey Coastguard and the RNLI are informed as to the weekly results for inclusion on social media.

2019 bathing water results
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width:750
height:360

Source: Environmental Health, download the data

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​

2019 Sea water monitoring schedule

​Date
Route
13 May 2019​​A
21 May 2019
​B
28 May 2019​A​
​4 June 2019
​B
​10 June 2019
​A
​18 June 2019
​B
​24 June 2019
​A
​2 July 2019
B​
​8 July 2019
​A
​15 July 2019
​B
​22 July 2019
​A
​30 July 2019
​B
5 August 2019​
A​
​12 August 2019
B​
​19 August 2019
​A
​27 August 2019
​B
​2 September 2019
​A
​9 September 2019
​B
​16 September 2019
​A
​24 September 2019
​B


The 2019 bathing season shall be defined as commencing on Monday 13 May and ending on Tuesday 24 September.  

Route A

Greve de Lecq, Le Braye, St Brelade’s Bay, La Haule, Victoria Pool, Grouville, Green Island, Havre des Pas, Plemont, Portelet, Archirondel.

Route B

Greve de Lecq, Le Braye, St Brelade’s Bay, La Haule, Victoria Pool, Grouville, Green Island, Havre des Pas, Watersplash, Beauport, Bonne Nuit, Bouley Bay.

Bouley Bay, Greve de Lecq, St Brelade, La Haule, Victoria Pool and Grouville will be sampled 20 times during the bathing season. Plémont, Watersplash, Le Braye,  Beauport, Portelet, Havre des Pas, Green Island and Archirondel will be sampled 10 times during the bathing season as these sites have consistently excellent water quality.

​​​​Quality of sea water

The sampling and analysis of sea water is carried out by Environmental Health. 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.

2019 bathing water results for the bacteria Escherichia coli and intestinal enterococci
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width:750
height:380

Source: Environmental Health, download the data

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.

Most popular beaches

Sea water at 15 of the most popular beaches around Jersey is monitored up to 20 times between mid May to the end of September each year. Bathing waters are classified annually based on samples collected from the previous 4 years. The classifications are 'Excellent, 'Good', 'Sufficient' and 'Poor'. Water samples are tested for the bacteria Escherichia coli and intestinal enterococci, which indicate whether there is faecal matter in the water. The annual classifications are shown in the sea water profiles.

2018 sea water quality ​results

During the 2018 summer season, 9 of Jersey's bathing water sites of 'Excellent' quality, 2 were 'Good' quality and one was 'Sufficient' quality.

'Excellent' quality classification

  • Archirondel
  • Beauport
  • Green Island
  • Grève de Lecq
  • Havre Des Pas
  • Le Braye
  • Plémont
  • Portelet
  • Watersplash

'Good' quality classification

  • ​​Bouley
  • ​St Brelade
  • Victoria Pool

'Sufficient' quality classification

  • ​Bouley Bay
  • ​Le Haule

'Poor' quality classification

  • ​No bathing water sites were rated as 'poor' quality

Sea water profiles

A profile has been produced for each of Jersey's monitored sea waters. As well as providing useful information they are a requirement of the revised Bathing Water Directive. 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

Archirondel

Beauport

Bouley Bay

Green Island

Greve de Lecq

Grouville

Havre des Pas

La Haule

Le Braye

Plémont

Portelet

St Brelade's Bay

Victoria Pool

Watersplash

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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