Firefighters and farmers have been praised for preventing a major pollution incident in the Conwy Valley.
Bunds - or embankments - were put up to contain water used during a fertiliser, tyre and vehicle fire at Talybont early on Sunday.
Drains were also blocked and it prevented the water flowing to the Afon Dulas which feeds the Afon Conwy river.
Environment Agency Wales said the fire crews and the farmers had prevented a "serious environmental incident".
"The fire incinerated many tonnes of fertiliser, tyres and two vehicles," said Sian Williams, from the agency.
"All of these contained pollutants which could have entered the Conwy in the water which firefighters used to tackle the blaze," she added.
Ms Williams said the incident was a great example of how agencies could work together to prevent a "secondary" incident happening when tackling fires of this type.
"We can be quite sure that this would have been a serious environmental incident if the fire crew had not used this equipment," she added.
The farmers involved, Gareth and Martin Hughes, were also praised for calling in a contractor when the run-off water was threatening to overflow the bunds.
The contaminated water was spread on a nearby field.