An urgent warning not to use or drink water issued to Pukehina Beach residents this morning has now been extended to the wider Bay of Plenty.
The warning which was originally aimed at beach residents now also includes Paengaroa, Maketu, Little Waihi and Pongakawa areas.
The warning comes after two complaints, including a report of a woman who came out in a rash after taking a shower.
An investigation was being held into the cause of the issue.
Western Bay of Plenty District Council said the system that supplied water to these areas was going to be flushed and in the meantime residents were being asked not to drink or bathe in the water as a precaution.