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Hydropower
Arrajärvi
Lahti, Finland
Datum
N2000
Date
2026-10-04
Gauge
2041
74.35 m N2000
74.35 m N2000 is the gauge reading converted with SYKE's official datum correction. It is elevation, not a share of stored water. The percentage is where that elevation sits between the lower and upper levels in the regulation permit, both shown on N2000. A lake can stand above 100% when it is over the upper limit. SYKE does not publish the stage-storage curve that would turn this into a volume percent. Compared with 2025-10-04, the level is unchanged.
Water level
74.35 mvs 1 year ago
0.00 mRegulation band
90.0%Permit limits
74.17–74.37 m90.0% of the regulation band
74.17 m lower limit74.37 m upper limit
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Datum | N2000 |
| Use | Hydropower |
| Municipality | Lahti |
| Gauge | 2041 |
| Lower limit | 74.17 m N2000 |
| Upper limit | 74.37 m N2000 |