| Site number | 25142 |
| Measuring point system | Grundnetz |
| Community | Jachenau |
| District | Bad Tölz-Wolfratshausen |
| Operator | |
| Aquifer | Quartär |
| Measurement site depth under ground [m] | 19.72 m |
| Ground level | 805.00 m above sealevel |
| Easting | 679378 (ETRS89 / UTM Zone 32N) |
| Northing | 5268896 |
| Observation period | 07.05.1979 to 22.06.2026 |
Hauptwerte (Tagesmittelwerte): |
| Maximum waterlevel (HHW) | 804.04 m above sealevel |
| Mean waterlevel (MW) | 802.42 m above sealevel |
| Minimum waterlevel (NNW) | 800.06 m above sealevel |
| Mean Highest Groundwater Level (MHGW) | 803.13 m above sealevel (Period: 01.11.1978 - 01.11.2026) |