Brian Barton
The UK has many beautiful beaches, lakes, and rivers that are enjoyed by swimmers and other water enthusiasts. However, pollution can sometimes pose a risk to these environments and the people who use them. The Environment Agency regularly tests the water quality of designated bathing waters and makes this information available to the public via the Swimfo website. Water quality is assessed by taking samples and testing for bacteria, such as E. coli and intestinal enterococci, which can come from sources of pollution like sewage and agricultural livestock. To help protect public health and the environment, organisations like Surfers Against Sewage also provide real-time water quality updates and alerts for pollution risks across the UK through their Safer Seas and Rivers Service app. These resources enable people to make informed decisions about where and when to swim, ensuring they can enjoy the UK's waterways safely.
| Characteristics | Values |
|---|---|
| Water quality testing period | May to September |
| Frequency of sampling | Daily |
| Number of samples | 7,500 |
| Bacteria tested | E coli and intestinal enterococci |
| Sources of bacteria | Sewage, agricultural livestock, wildlife, birds and road drainage |
| Water quality classification | Excellent, Good, Sufficient or Poor |
| Water quality information sources | Swimfo website, Gov.uk, and signs at beaches |
| Pollution risk forecasting | Available on the Swimfo website |
| Sewage alerts | Available on the Safer Seas and Rivers Service app |
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What You'll Learn
Water quality testing by the Environment Agency
Water quality testing is conducted by the Environment Agency to ensure that the bathing waters in England are safe and clean for the public to enjoy. From May to September, the Environment Agency conducts weekly assessments and issues daily pollution risk forecasts for designated bathing water sites. These sites include beaches, lakes, and rivers.
During the bathing season, Environment Officers like Jenny Kent take thousands of water samples from various locations across England. These samples are then sent to laboratories for testing, focusing on two types of bacteria: E. coli and intestinal Enterococci, which indicate the presence of faecal matter in the water. The sources of bacteria can include livestock, urban drainage, sewage, birds, wildlife, and pets.
The Environment Agency uses semi-quantitative gas chromatography-mass spectrometry (GC-MS and LC-MS) to analyse water samples for a wide range of substances simultaneously. This comprehensive testing helps identify any potential health risks for swimmers and bathers. The data collected from these tests is made available to the public through the Water Data Explorer portal, where users can access live and historical water quality information.
The Environment Agency's efforts have significantly improved water quality at designated bathing water sites compared to previous decades. Most of these sites are now classified as "Excellent" or "Good". However, there is still room for improvement, especially in tackling various sources of pollution. The agency works collaboratively with water companies, farmers, regulators, councils, and local businesses to reduce pollution and maintain high standards of water quality.
Additionally, organisations like Surfers Against Sewage are actively campaigning for national standards and consistent sewage alerts. Their Safer Seas and Rivers Service app provides real-time water quality updates and alerts for pollution risks across the UK. This empowers communities and individuals to make informed decisions about their health and wellbeing when visiting UK beaches and bathing waters.
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Sewage discharge and pollution risk alerts
- Surfers Against Sewage's Safer Seas and Rivers Service (SSRS): This service provides a free app that offers real-time water quality and beach safety information for over 550 locations across the UK. The app alerts users to sewage discharges and pollution risks, helping them make informed decisions about their swimming locations. The coverage of the app depends on the data provided by water companies and the availability of Pollution Risk Forecasts. SSRS also allows users to add locations as “dormant," even if there is no data available for that specific location, enabling them to flag these spots to water companies for investigation.
- Environment Agency's Swimfo Website: The Environment Agency, which is responsible for monitoring and testing bathing water quality in England, provides regular updates on water quality through its Swimfo website. They publish daily pollution risk forecasts during the bathing season (May to September) to inform the public about potential reductions in water quality due to factors such as heavy rainfall, wind, or tides. The website also offers bathing water profiles, including information on algae blooms during the bathing season, to help users make informed choices about their swimming locations.
- Bathing Water Quality Profiles: The Environment Agency produces profiles for designated bathing waters, displaying the latest classifications based on water quality testing. These profiles provide detailed information about each bathing water location, helping people decide where to swim. The profiles are available on the Environment Agency's Swimfo website and are also displayed on signs at beaches.
- Interactive Maps: Organisations like Surfers Against Sewage create interactive maps to provide visual representations of pollution risk warnings across the UK. These maps enable locals and tourists to identify affected areas, from popular seaside towns to specific counties, and make informed decisions about their beach visits.
- Water Company Notifications: Water companies are responsible for managing sewage discharges and providing notifications to relevant organisations, such as Surfers Against Sewage, when there are concerns about potential sewage pollution incidents. These organisations then disseminate this information to their members, keeping them informed about potential risks.
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Testing for bacteria (e.g. E. coli)
Bacteria testing is conducted by taking samples of the water at designated bathing sites. These samples are then analysed to detect the presence of specific bacteria that indicate faecal contamination. One of the commonly tested bacteria is Escherichia coli, or E. coli, which is a type of faecal indicator organism (FIO). FIOs can originate from various sources, including sewage, agricultural livestock, wildlife, birds, and road drainage.
The presence of E. coli and other FIOs in water samples is measured against standardised thresholds specified in the Bathing Water Regulations, which are based on World Health Organization research. These regulations help classify bathing waters as excellent, good, sufficient, or poor. If a beach is classified as poor, a sign advising against bathing will be displayed, but the beach will remain open for visitors to enjoy other activities.
To keep the public informed about water quality and potential health risks, the Environment Agency publishes water quality test data on its website and through the Safer Seas Service app. This app provides notifications and alerts about water quality issues and sewage discharges at over 550 locations across the UK. Additionally, organisations like Surfers Against Sewage contribute to public awareness by providing a Sewage Map and collaborating with water companies to establish consistent sewage pollution alerts.
By combining regular water sampling, data analysis, and the use of technology, such as apps and maps, beachgoers in the UK can make informed decisions about their health and safety when visiting beaches and bathing sites.
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Using the Swimfo website and app
The Swimfo website and app provide a convenient way to access information about beach pollution in the UK. By using Swimfo, you can ensure that you have the latest data and insights to make informed decisions about your beach visits. Here's how you can use Swimfo to test for pollution at UK beaches:
Website Features:
- Visit the Swimfo website and navigate to the "Beach Pollution" section.
- Here, you'll find an interactive map of the UK, with colour-coded indicators for each beach, reflecting the latest pollution levels.
- Zoom in on your area of interest or use the search bar to find a specific beach.
- Click on the indicators to view detailed information about the pollution levels, including the type of pollution, the potential sources, and the recommended course of action.
- The website also provides a historical pollution record for each beach, allowing you to track changes over time.
Mobile App Features:
- Download the Swimfo mobile app on your device from the Apple App Store or Google Play Store.
- Create an account or log in to customise your experience and save your favourite beaches.
- Enable location services to find the nearest beaches with real-time pollution data.
- Set up notifications to receive alerts about changes in pollution levels at your favourite beaches.
- The app offers a user-friendly interface with easy-to-understand graphics for on-the-go access to information.
- It displays the latest pollution measurements, including water quality parameters and any potential health risks.
- You can also report pollution incidents directly through the app, providing photos or videos, and view reports from other users.
By utilising both the Swimfo website and mobile app, you can benefit from timely updates and comprehensive insights into beach pollution levels. This empowers you to make informed choices, ensuring a safe beach experience. Stay connected to the website and app for regular updates, especially before planning beach visits.
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Algal blooms and their potential toxicity
Algal blooms, or harmful algal blooms (HABs), occur when colonies of algae, or simple aquatic plants, grow out of control and produce toxic or harmful effects. Algae are always present in natural bodies of water like oceans, lakes, and rivers, and while most are non-toxic, a few types produce toxins. In these toxic algae, environmental factors such as light, temperature, salinity, pH, and nutrient levels can stimulate toxin production.
The toxins released by these algae can seriously harm people, animals, fish, and other parts of the ecosystem. Human illnesses caused by HABs are rare but can be debilitating or even fatal. The toxins can also kill fish, mammals, and birds. Some algal blooms can also reduce the oxygen levels in the water as they decay, clogging the gills of fish and invertebrates, or smothering corals and aquatic vegetation.
The immediate health effects of harmful algal blooms are known, but long-term health effects in people and animals are still unclear. Scientists are currently investigating the potential chronic health impacts of HABs. For instance, consuming trace amounts of neurotoxic domoic acid, a neurotoxin produced by certain harmful algae, over time may damage brain function, especially in children or the elderly.
To identify and address HABs, NOAA's HAB Analytical Response Team provides scientific guidance and identification of harmful algae and their toxins during suspected HABs. They also respond to related marine animal mortality events and potential toxin-related human illnesses. NOAA also has a Prevention, Control, and Mitigation of Harmful Algal Blooms Research program, which aims to provide coastal managers with cost-effective HAB management strategies to promote healthier fisheries and ecosystems.
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Frequently asked questions
The Environment Agency regularly tests the water quality of designated bathing waters and makes this information available to the public via the Swimfo website. You can also check the water quality on the Safer Seas and Rivers Service app, which provides real-time water quality and beach safety information.
The Environment Agency takes samples of water from designated bathing sites, which are then sent to a specialist laboratory for testing. The samples are tested for two types of bacteria: E. coli and intestinal enterococci. The amount of bacteria found in the water is used to determine the standard of water quality and give each bathing water a classification of excellent, good, sufficient, or poor.
Pollution can reduce water quality, and certain types of pollution can make it unsafe for swimming. Sewage discharges, for example, can introduce harmful bacteria into the water. Other sources of pollution include agricultural livestock, wildlife, birds, and road drainage.
Swimming in polluted water can pose several health risks. Bacteria and other contaminants in the water can cause skin, ear, eye, and wound infections, as well as gastrointestinal illnesses. It is important to check for pollution risk warnings and avoid swimming in areas with known pollution issues.
