La bathing water quality is back in the spotlight in the middle of the summer season, with administrations reinforcing controls and publishing updated data to ensure safe recreational use. Surveillance extends to both maritime beaches as well as continental bathing areas, with protocols that prioritize rapid incident detection.
The latest available analyses point to a mostly favorable outlook, with solid figures in the European Union and a deployment of Intensive sampling and responses within 24 hours in communities such as Valencia and Andalusia. Even so, they remain specific restrictions in specific environments due to localized pollution episodes.
State of bathing water quality: Europe and Spain
The most recent report of the European Environment Agency, with more than 20.000 sites analyzed (including countries such as Switzerland and Albania), reveals that the 96% of bathing waters meet the minimum requirements by the regulations, and just a 1,5% presents poor quality. In the lead is Cyprus (99,2% excellence), followed by Bulgaria, Greece, Austria and Croatia, all above 95% of areas assessed as excellent.
Spain is positioned in the tenth place, with the 87,6% of its areas classified as excellent quality, above the EU average in that indicator. Completing the distribution of qualities in our country is a 9,9% as good, 1,8% sufficient or with a 1,7% as worse quality, according to data published for the 2024 campaign.
At the regional level, the surveillance in Andalusia confirms that the beaches of Huelva are within the regulatory levels, after 50 samples at 50 points of 25 bathing areas and nine municipalities. The parameters reviewed include microbiological indicators, transparency, color, mineral oils, persistent foams and floating solids, among other elements of health interest.
Overall, during the first half of August in Andalusia, the number of cases has been controlled. 382 sampling points en 303 bathing areas with regular season, of which 278 are maritime y 25 continentals (with the season starting on July 1). This is a continuous monitoring process, with public reporting of results every two weeks.
Regarding incidents, a disturbance was recorded on the beach of The Pond (Salobreña) which prompted the recommendation not to swim between August 7 and 11, a measure now withdrawn following the recovery of the parameters. At the continental level, the Swimming ban in La Colada (Córdoba) by presence of cyanobacteria detected in environmental controls since August 5.
By provinces and maritime beaches, they have been carried out 91 samplings in Almería (78 zones, 14 municipalities), 79 in Cadiz (58 zones, 16 municipalities), 40 in Granada (38 points in 30 zones and 10 municipalities) and 100 in Malaga (99 points in 87 zones and 14 municipalities). These data reflect a control effort constant and homogeneous throughout the Andalusian coast.
As for the inland waters, samples have been taken, among others, in the Cela reservoir (Almería); reservoirs of the Breña II y the laundry (Cordoba); Arcos, Bornos and Arroyomolinos (Cadiz); Cubillas, Bermejales, Negratín, Fuencaliente spring and Toba River (Granada); in Jaén, several sections of the Guadalquivir, Rumblar, Jándula, Encinarejo and tributaries; in Málaga, the Count of Guadalhorce and the Hedionda spring; and in Seville, the Huéznar Riverbank.
The health report is disseminated every fifteen days during the bathing season (of 1 from June to 30 from September) and can be consulted in the territorial viewer enabled by the Andalusian Regional Government, which already includes improvements in geolocation and status by beach: official information on bathing areas. In addition, there are 16 short-term zones in continental waters, adapted to their seasonality.
Surveillance in the Valencian Community and technological developments
The Valencian Community has completed more than 4.600 microbiological analyses this season, with a program that covers 250 beaches and 15 inland bathing areas. The protocol allows to obtain results in less than 24 hours and activate emergency mechanisms with new tests and corrective measures if anomalies are detected.
As of today there is no closures in official bathing areas in the Community. However, the recommendation for prohibition in coastal sections not registered as official in Meliana and Alboraia, where ditches flow into with levels of pollution incompatible with bathing and which can affect nearby waters.
En Port Saplaya (Alboraia), the restrictions have resulted in partial closures since August 5, with a history of red flag at the end of JulyWeekly analyses are performed, while lifeguards and fences They delimit perimeters of between 100 and 150 meters around discharges. The Generalitat has requested clear signage in the sections of influence: from the San Vicente irrigation ditch y The marquesse up to 200 meters to the south, and from the Carraixet ravine up to 50 meters to the south. The council has asked to review criteria for extending closures if contaminated water could disperse further.
The Ministry of Environment frames these actions within a priority objective: to guarantee a safe summer and preserve user confidence with continuous monitoring and rapid action when deviations from the most demanding quality standards are observed.
Along with classic surveillance, the importance is gained by real time monitoring with new technological solutions. The project SEActive, developed by Sensactive Technology (Granada), Tecysa (Cádiz) and Innovia (Madrid) with support from CTA and collaboration of the Sevilla University and the San Cecilio University Hospital, integrates multiparameter sensors and biosensors to measure temperature, pH, turbidity, conductivity and E. coli and enterococciThe buoy incorporates IoT, GSM/GPRS and GPS communications to send data to digital management platforms.
The prototype has been validated on the beach of Valdelagrana (El Puerto de Santa María) and is ready to integrate with NAIAD, the official system. The interest of administrations in its acquisition anticipates its deployment in more coasts, with an impact on public health, efficiency and SDGs linked to water and the environment.
In parallel, the Bay of Cádiz starts a Bathing Water Quality Monitoring Network with smart buoys developed by local companies (WDTech, TECYSALAB and SENSACTIVE). The system collects and analyzes parameters physical-chemical and microbiological in real time, facilitating an immediate response to any contamination episode.
The project has institutional support and funding from 218.462 Euros of the Provincial Council of Cadiz for its first phase (2025), with facilities in Valdelagrana, La Cachucha, El Rompidillo and Sancti PetriA second phase, planned for 2026, includes eight new units en Cadiz, San Fernando, El Puerto, Chipiona and Rota, with a vocation for scaling and replicability.
In addition to improving user security, these solutions optimize public resources by reducing personnel and laboratory costs thanks to autonomous equipment, low maintenance and remote operation, and position the Cadiz coast as a benchmark in the application of technology to environmental management.
The reinforcement of surveillance, the favorable results in Europe and the commitment to early warning tools create a scenario in which the vast majority of areas offer safe conditions for bathing; however, it is advisable to consult official warnings and respect the local signage, especially near irrigation ditches and estuaries where occasional incidents may occur.