A new EPA report says the water quality in Irish waters has fallen.
A new assessment says 197 river water bodies have improved in quality between 2015 and 2017 - but 269 have dropped.
This means a net overall decline of 3% - or 72 water bodies.
Most pollution's caused by too much nitrogen and phosphorus entering waters - which come from human activities, like farms and urban areas.
Source: EPA
But there have been some positive changes too - as serious pollution continues to decrease.
The EPA says only two rivers were 'seriously polluted', compared to five in the 2013-2015 period.
EPA science officer Wayne Trodd says they want to tackle the problem locally.
"The plan is to start tackling these issues on a local level, using the local water communities officers.
"They'll be working with the local authorities, they'll be looking at the rivers at that local level and to see what the problem is and where it can be tackled."
