| Code | Label | Definition |
|---|---|---|
| 0 | Phreatic groundwater (shallow): 0-5 m (inclusive springs 0 m) | |
| 1a | Phreatic groundwater (deep): 5-15 m | |
| 1b | Phreatic groundwater (deep): 15-30 m | |
| 1c | Phreatic groundwater (deep): >30 m | |
| 2 | Captive groundwater | |
| 3 | Karstic groundwater | |
| 4 | River water | |
| 5 | Lake water | |
| 6 | Transitional water | |
| 7 | Coastal water | |
| 8 | Marine water |
European Environment Agency
Kgs. Nytorv 6, DK-1050 Copenhagen K, Denmark