In implementation of Directive 91/676/EEC (Nitrates Directive), Legislative Decree of April 3, 2006, No. 152, in Article 92, paragraph 7, requires Regions to adopt and implement mandatory action programs (PdA) for the protection and recovery of water from pollution caused by agricultural nitrates in areas designated as Nitrate Vulnerable Zones (ZVN). Paragraph 8-bis of the same article requires Regions to review and, if necessary, revise the mandatory action programs at least every four…

The presence or absence of a sewage network and the percentage of wastewater conveyed into collection systems indicate the degree of compliance with the requirements of the applicable regulations. In 2022-2023, the national compliance rate is 99.1%. Of the organic load, 95.7% is conveyed into the sewer system, 3.6% is treated through individual systems, while 0.7% is not connected.

Compliance monitoring allows for an understanding of the technological adaptation status of urban wastewater treatment systems for agglomerations greater than or equal to 2,000 PE (Population Equivalent). This is particularly useful for planning potential actions aimed at water protection.

Between 2022 and 2023, out of the 3,037 agglomerations analyzed, approximately 77% were found to be compliant, 13.8% non-compliant, 4.6% partially compliant, and 4.6% with data unavailable. A 100%…