Alectra says it has investigated a potential data leak and determined no customer information has been breached.

City staff announced Wednesday that there was a potential leak of information through the utility, which handles water billing for about 150,000 customers on behalf of the city.

Mayor Fred Eisenberger previously said the potential breach was discovered by staff and may have originated off shore.

City programmers were doing work and realized that some of Alectra's third party vendors may have access to information without the appropriate approval.

But on Friday the utility issued a statement saying it had carried out a "thorough investigation" and found "no breach of customer information has occurred and Alectra has met all of its applicable privacy obligations."

The utility went on to thank the city for "exercising an abundance of caution" and said it wants to reassure customers that the information it's entrusted with is secure.

"Regrettably, Alectra Utilities had not obtained written authorization from the City of Hamilton to grant access to information to some agents for the purposes of providing water billing services," the statement read. "Alectra Utilities is working closely with the City to correct this oversight."