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Government of

Information and public services for the Island of Jersey

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

Seawater monitoring

​​​​​​​​​​​​​​​​​Latest results

Find the latest results of the seawater quality in the map and table below.

The results are a weekly snapshot of seawater quality.​

The full classification is calculated once a year for each bathing water site. This is based on all samples from the last 4 years.

If you notice pollution on the beach or in the sea, call +44 (0) 1534 709535.​

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Open seawater results map

Open seawater results table

Non-routine sampling 

We may sometimes undertake additional sampling if there are concerns about the quality of the bathing water.

​Result (E.coli cfu/100ml)
​15 May 2024
​Greve de Lecq
​​15 May 2024
​Victoria Pool
​​15 May 2024
​La Haule
​16 May 2024
​Victoria Pool
​Less than 10
​16 May 2024
​La Haule
​17 May 2024
​Greve de Lecq

Bathing water classifications​

​Bathing classification
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 Stars

Poor water quality

Indicates values are above 500 Escherichia coli per 100ml and above 200 Intestinal enterococci per 100ml​

Water safety for swimming

We provide the seawater data to Environmental and Consumer Protection every week.

They analyse the data and consult other stakeholders to make a decision on whether to advise against swimming in specific bays. If the results are poor, they would notify the media and signage would be displayed at the relevant bays.

Jersey has some of the cleanest water in Europe. Poor water quality can happen after periods of heavy rain. You should wait at least 24 hours before you swim after bad weather.

To contact Environmental and Consumer Protection call +44 (0)1534 445808 or email​.

Monitoring seawater

We monitor seawater from Monday 13 May to Tuesday 24 September as part of the EU Bathing Water Directive.

You can find the most recent results on the map and table above.

We monitor seawater quality to:

  • ensure compliance with the EU Bathing water directive
  • gain information on Jerseys sea​​​​water safety for swimming and recreational use
  • identify episodes of pollution and ensuring compliance with Water Pollution (Jersey) Law 2000
  • get valuable information for Jersey residents and tourists on the quality of Jerseys seawater
  • provide information to the aquaculture industry, such as oyster or mussel farming

Different teams are involved in the monitoring process: 

  • the Water and Air team and Environmental Protection team take the samples 
  • the Official Analyst’ laboratory carry out the analysis
  • Environmental and Consumer Protection advise on the safety of swimming in consultation with other stakeholders

​We classify our beaches following guidance from the European Directive and by the World Health Organisation.

Since 2015 bathing water classifications throughout Europe are based on sampling data collected over 4 years. Monitoring in Jersey started in 1992.

If you want historic data call +44 (0) 1534 441600 or email

Monitoring schedule

Month Date
May13 and 14 May 2024
May20 and 21 May 2024
May28 and 29 May 2024
June3 and 4 June 2024
June10 and 11 June 2024
June17 and 18 June 2024
June24 and 25 June 2024
July1 and 2 July 2024
July8 and 9 July 2024
July15 and 16 July 2024
July22 and 23 July 2024
August29 and 30 July 2024
August5 and 6 August 2024
August12 and 13 August 2024
August19 and 20 August 2024
August27 and 28 August 2024
September2 and 3 September 2024
September9 and 10 September 2024
September16 and 17 September 2024
September23 and 24 September 2024

​List of bays we monitor

We monitor 16 bays around Jersey:

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

To ensure accuracy and consistency, a duplicate sample and analysis is done each week by the Official Analysts laboratory.

Seawater profiles for each bay

A profile has been produced for Jersey's monitored seawaters.

Each profile includes:

  • a photograph, description, map of the seawater and surrounding area
  • an identification of potential sources of pollution and measures to reduce pollution
  • the phone number to report water pollution and contact details for more information

Archirondel seawater profile

Beauport seawater profile

Bonne Nuit seawater profile

Bouley Bay seawater profile

Green Island seawater profile

Greve de Lecq seawater profile

Grouville seawater profile

Havre des Pas seawater profile

La Haule seawater profile

Le Braye seaw​ater profile

Plémont seawater profile

Portelet seawater profile

Rozel seawater profile

St Brelade's Bay seawater profile

Victoria Pool seawater profile

Watersplash seawater profile

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