WASTEWATER TREATMENT PLANTS (WWTPs): Blue indicates WWTPs compliant with the requirements of the Directive 91/271/EEC (UWWTD). Red indicates WWTPs that are not compliant with the UWWTD, either because they do not collect a sufficient number of samples per year or because the effluent is not within the limits set by the UWWTD.

AGGLOMERATIONS: Green indicates agglomerations compliant with the UWWTD, i.e. connected with a collecting system (connection rate >98%) and served by a wastewater treatment plant. Orange indicates agglomerations not compliant with the UWWTD, i.e. not served by a collecting system or the connection rate is less than 98% or the UWWTP is not compliant with the requirements of UWWTD.

The size of the dot is logarithmically related to the capacity of the Plants and the population equivalent for the agglomerations.