More people seek help for problem drinking in the three months following Dry July, the Salvation Army says.
Dry July is a campaign to encourage people to give up alcohol for a month in an effort to raise money to support cancer patients.
The fundraising programme began in Australia in 2008 and expanded to New Zealand in 2012.
Money raised goes to hospitals throughout the country, mainly to provide more comfortable spaces for patients and their families.
The Cancer Society has also received funds from Dry July for patient transport services.