South West MLC Adele Farina was one of about thirty people who attended a Keep Busselton Water Pure Group public fill-up event on Friday morning.
The group encouraged residents to come and fill up their drink bottles at the new filtered water stations installed at the Busselton foreshore.
They questioned why tourists were given chlorine-free water but not residents and wanted to let people know there was now a filtered water source in town.
The City of Busselton confirmed the fountains were filtered but did not provide a reason.
Ms Farina said the City of Busselton must explain the decision to Busselton residents.
“I think the issue here it it’s really clear the City of Busselton have failed to take a position on Busselton Water at a time when two of their members were on the Busselton Water Board,” she said.
“I think these residents have raised serious questions about the action being taken by the City of Busselton and I think they do need to explain why it’s filtered water and why they’ve not taken a stand on providing filtered water to the residents of Busselton.”
KBWPG committee member Diana Michaels said they were “reasonably happy” with the turnout to the rally but noted there was some confusion about the time.The group has called for a parliamentary inquiry into the chlorination of Busselton’s water supply, which was enacted by Busselton Water for health reasons last year.