Gauge Mainz: current water level and draft

Water level at the Mainz gauge

On 25/10/2026 at 05:15 the Mainz gauge read 126 cm, 1 cm lower than 24 hours earlier. Source: PEGELONLINE (WSV).

Gauge Mainz is on the Rhine at kilometre 498, on the km 462–508 stretch.

Fairway depth and rule of thumb

The GlW is 171 cm and the fairway depth maintained below it (TuGlW) is 210 cm; after deducting 30 cm of safety margin the official rule of thumb comes out at Mainz +9. In practice Mainz +30 is used here, +21 cm against the official rule.

The fairway depth below GlW is what counts as long as no Fehltiefen are reported. Fehltiefen (shortfalls in fairway depth) are published on ELWIS Fehltiefen. The safety margin is not a statutory value and has to be taken on top of the reduced fairway depth listed there.

High water: Marke I and Marke II

At high water Marke I is at 475 cm and Marke II, above which the waterway closes, at 630 cm.

Forecasts and neighbouring gauges

This gauge has one forecast source: the 2-day forecast from the Hochwasserzentrale Rheinland-Pfalz (red). Upstream lies Worms, downstream Oestrich.

Reference planes

The reference planes at the Mainz gauge, evaluated at the gauge's position.

• GlW171 cm PNP
  GlW 2022
  Source: WSV, GlW 2022

Gauge zero: 78.373 m NHN (DHHN2016)