Having monitored Ireland's surface and ground waters between 2004 and 2006, it shows "an improvement in river and lake water quality, but poorer quality in some groundwaters". Findings included that:
- River channel: 71% was of satisfactory water quality.
- Lake surface: 92% was of satisfactory water quality.
- Estuarine/coastal water bodies: 19% were eutrophic; 3% were potentially eutrophic.
- Groundwater samples: 57% contaminated by faecal coliforms; 25% exceeded the national guideline value for nitrate concentration for drinking water, and 2% breached the mandatory limit.
- Fish kills: fewer than in 2005, but still unreasonably high.