| Chalk river and stream |
| Fast flowing river and stream |
| Lowland fen |
| Marginal and inundation |
| Nutrient rich eutrophic lake |
| Peat stained (dystrophic) water |
| Pond ditch and canal |
| Sluggish river and stream |
| Turlough and fluctuation mere |
| Upland lake loch and tarn |
| Upland spring flush |