The council sought more money from the ministry in 2013 and 2015 for funding to install two further bores to ensure they could meet the towns' water needs.
"We trialled two bores and then once we knew that they were suitable we knew the project could go ahead," Mr Crimp said.
In total the SWDC received a $667,500 subsidy from the Ministry of Health.
"So now we have got that money we can connect those test bores into fully functioning units. We need four bores to pull enough water to suit our needs."
Mr Crimp said the project would greatly benefit the district.
"We'll have a better quality source water not requiring filtration, and as a result lower production costs," he said.
"We will be able to comply with the current New Zealand Drinking Water Standards and have better security of supply for both Featherston and Greytown," Mr Crimp said.