The survey was conducted at 12 stations in the coastal waters of the Maltese Islands over a period of one year between May 2012 and July 2013. Sea water samples were collected at a depth of 5 metres using a Niskin bottle. These were transported to the laboratory in appropriate containers, where they were analysed for the level of pollutants using International Organization for Standardization and US Environmental Protection Agency standard procedures. The pollutants tested for are Priority substances and are divided into oils and miscellaneous. All stations were tested for oils, while only 9 stations were tested for miscellaneous pollutants. The measurements were made in connection with a monitoring survey of Maltese coastal waters. The resultant datasets generated provide the benchmark for long term monitoring programs and assessments that are required in order to implement EU Directives on water resources.

The survey was conducted at 26 stations in the coastal waters of the Maltese Islands over a period of one year between May 2012 and July 2013. Sea water samples were collected at 5 metres using a Niskin bottle. Nitrites, nitrates and Total Nitrogen were calculated on site using a probe and photometer, since these have a short holding time. They were then verified in the laboratory, where the other parameters were also measured, using the following methods: UNI EN ISO 10304-1:2009 (for Nitrites. Nitrates and Phosphates), APAT CNR IRSA 4060 Man 29 2003 (for Total Nitrogen), APAT CNR IRSA 4030B Man 29 2003 (for Ammonium Ions) and EPA 2007 1994 (for Total Phosphorous as P).

The survey was conducted at 26 stations in the coastal waters of the Maltese Islands. The pollutant levels were measured during a pilot survey and then once (in two replicates) over the period between 30th May 2012 and 7th August 2012. During the surveys, samples of P. oceanica were collected from representative areas along the Maltese coast, and shipped to a laboratory in Italy for analysis according to the following procedures: UNI EN 15763:2010 (for Mercury); UNI EN 15662:2009 (for Hexachlorobenzene); EPA 5021A 2003 + EPA 8260C 2006 (for Hexachlorobutadiene). The measurements were made in connection with a monitoring survey of Maltese coastal waters. The resultant datasets generated provide the benchmark for long term monitoring programs and assessments that are required to implement EU Directives on water resources.

The survey was conducted at 26 stations in the coastal waters of the Maltese Islands. Physicochemical parameters were measured at monthly intervals over the period between 30th May 2012 and 24th July 2013. Measurements were made only at a depth of 5m from the surface. All parameters were measured using a multi-parametric probe. The multiparametric probe used was the YSI 6820 V2-1, equipped with a data display and logging system YSI 650 MDS. This probe has one optical port, conductivity/temperature port, Rapid Pulse DO port, pH/ORP port, and 3 ISE ports.