| Site number | 21121 |
| Measuring point system | Grundnetz |
| Community | Ampfing |
| District | |
| Operator | |
| Aquifer | Niederterrasse |
| Measurement site depth under ground [m] | 22.00 m |
| Ground level | 421.10 m above sealevel |
| Easting | 752114 (ETRS89 / UTM Zone 32N) |
| Northing | 5349703 |
| Observation period | 03.11.1975 to 12.07.2026 |
Hauptwerte (Tagesmittelwerte): |
| Maximum waterlevel (HHW) | 411.56 m above sealevel |
| Mean waterlevel (MW) | 409.46 m above sealevel |
| Minimum waterlevel (NNW) | 408.39 m above sealevel |
| Mean Highest Groundwater Level (MHGW) | 410.07 m above sealevel (Period: 01.11.1975 - 01.11.2026) |