The answer is yes. Under the Waste Water Treatment Systems (Registration) Regulations 2012 (S.I. No. 220 of 2012), owners of houses drained by a septic tank are obliged to register it with their local authority.
Under section 70D of the Water Services Act 2007 (as inserted by Section 4 of the Water Services (Amendment) Act 2012) a person who sells a property connected to a domestic wastewater treatment system (as defined in the 2012 Act) including, but not limited to, a septic tank, will be obliged on the closing of the sale to furnish a valid certificate of registration in respect of the treatment system to the purchaser.
A purchaser is obliged to notify the water services authority of the change of ownership after the sale is completed and failure to do so is an offence.
Under Section 70C there is an obligation to ensure that the plant does not constitute, and is not likely to constitute, a risk to human health or the environment and in particular it does not create a risk to water, air or soil, or plants and animals. There is also a duty not to create a nuisance through noise and odours.