Although she is bitterly upset, the old pub has seen better days and more custom and simply isn't worth the expense and struggle to overcome this major hurdle, she said.
NRC regulatory services general manager Colin Dall said the council had investigated after receiving a complaint from a member of the public in June.
The ensuing abatement notice requires the owner to "cease contravening the Resource Management Act".
"How this is achieved is up to the tavern owner and there are several options, [including] installation of a compliant wastewater treatment and disposal system or a holding tank to collect wastewater," Mr Dall said.
Ms Harrison claims the waste matter, including sanitary items, found during the NRC inspection did not come from the tavern.
A drain from the tavern has an easement to cross neighbouring land and ends near the riverbank, about 150 metres away.
Ms Harrison and her partner bought the tavern in 2010. The LIM (land information memorandum) obtained from Kaipara District Council (KDC) stated there was no information available on the sewerage and drainage system.
The couple's lawyer raised the matter with KDC and was told "it was legal", she said.
The LIM also notes the council can not be held responsible for any information that is not up to date.
"Why have a LIM at all, if it's not got the information you need about the land?" Ms Harrison said.
The 1926 Memorandum of Transfer, or title, does not mention waste disposal and the subject was not officially documented until 1986 when then Hobson County Council registered a septic tank on the site.
Ms Harrison said she was unaware of any issues until the NRC officer arrived and told her she had "a very big problem".
The hotel was built in 1926 to accommodate builders of the Tangiteroria bridge across the Northern Wairoa River. Its current licence expires in mid-2017.
