A discharge of mine processing waste water in Tasmania's north-west has prompted a warning from the Environment Protection Authority.
The EPA says there's a low risk the Park River at the Kara Mine near Hampshire could have small amounts of dissolved metal and is advising people not to drink it for the next several days.
"EPA officers have been on site today working with representatives from the mine operator collecting water samples," a DPIPWE statement said.
"The discharge relates to a failure of a pipe transferring mine tailings to the tailings settlement dam. Work has been undertaken to repair the pipe today and the discharge has ceased."
The river is expected to be discoloured due to clay sediment as the discharge moves down Park River and will enter the Emu River which flows through Burnie to Bass Strait.
Investigations are continuing.