Residents from two Perthshire villages have been assured there is now no danger from pollution that seeped into two rivers earlier this week.
The scare arose after aluminium sulphate was found downstream of the Glenfarg Reservoir following an incident at the Glenfarg Water Treatment Works overnight on Tuesday.
As the chemical spill moved downstream to Glenfarg and Aberargie, a risk management group consisting of representatives of NHS Tayside, Perth and Kinross Council, Scottish Water, Health Protection Scotland and the Scottish Environment Protection Agency (Sepa), was established.
The group was chaired by Dr Jackie Hyland, consultant in public health medicine with NHS Tayside.
Householders were subsequently warned to stay away from the water and advised not to allow pets or livestock access to it.
Some Glenfarg residents said the spill had led to a “milky coloured froth” in the river Farg and the river Earn.
The multi-agency group confirmed that the water quality conditions had returned to normal and that there was no longer any risk to river users.
They still advised people to avoid contact with dead fish that may be found in the river and said that a pond in Glenfarg still has traces of pollution.
A spokesperson for Scottish Water said: “The spill has now dispersed and water in the river Farg and river Earn has returned to normal.
“Pollution is still evident in a pond in Glenfarg village and remedial measures are being implemented.”
He continued: “Dead fish will still be evident in the river. Members of the public are advised to avoid contact with the dead fish.
“The risk management group will not meet again but partner agencies will continue to monitor the situation over the next couple of days.
“Scottish Water apologises to local residents and businesses for any inconvenience as a result of this incident and wants to thank people for their patience and understanding as they managed this event.”
For further details, call Scottish Water’s customer helpline on 0845 601 8855.