Find river, sea, groundwater and rainfall levels
| Measuring station | Height | Trend | State |
|---|---|---|---|
| Monnow at Skenfrith (Natural Resources Wales) | n/a | n/a | n/a |
| Monnow at Grosmont, Rhosllwyn (Natural Resources Wales) | n/a | n/a | n/a |
| Garren Brook at Marstow Mill | 0.46m | steady | LOW |
| Dulas Brook at Ewyas Harold | 0.06m | steady | LOW |