Sea water monitoring

2020 monitoring calendar and results

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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: 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: 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 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.

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

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

2020 Sea water monitoring schedule

The 2020 season runs from Monday 11 May to Monday 14 September, with the most recent results reported in the table at the top of this page.

Month	Date
May	11 May 2020
May	19 May 2020
May	27 May 2020
June	02 June 2020
June	08 June 2020
June	16 June 2020
June	22 June 2020
June	30 June 2020
July	06 July 2020
July	14 July 2020
July	22 July 2020
July	28 July 2020
August	03 August 2020
August	11 August 2020
August	19 August 2020
August	25 August 2020
September	2 September 2020
September	8 September 2020
September	14 September 2020
September	22 September 2020

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.

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

St Brelade
Victoria Pool
Grouville

'Sufficient' quality classification

Bouley Bay
Le Haule

'Poor' quality classification

No bathing water sites were rated as 'poor' 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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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.

Sea water profiles

A profile has been produced for each 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

Archirondel