The Water Services (Amendment) Act 2012 requires local authorities to maintain a register of domestic waste water treatment systems in their local areas.

Under the Act, owners of domestic waste water treatment systems must ensure that their systems are registered. The purpose of this amendment is to protect ground and surface water quality (particularly drinking water sources) from the risks posed by poorly functioning systems.

Inspections of domestic systems have been in operation since the 1st February 2013.

The EPA is responsible for the implementation of the national inspection plan & they use a risk-based approach to prioritise areas of higher risk to human health and water quality.