River level River Itchen at City Mill

Check for flood warnings in this area

Latest recorded level 0.54m at 4:30am Thursday 21 March 2019.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 0.78m here, minor flooding is possible in this area
• Highest recorded level. Hide
• Show highest recorded level

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Observed data

DateTime	Value	Error
2019-03-21T04:30Z	0.541	false
2019-03-21T04:15Z	0.54	false
2019-03-21T04:00Z	0.539	false
2019-03-21T03:45Z	0.539	false
2019-03-21T03:30Z	0.54	false
2019-03-21T03:15Z	0.538	false
2019-03-21T03:00Z	0.541	false
2019-03-21T02:45Z	0.54	false
2019-03-21T02:30Z	0.541	false
2019-03-21T02:15Z	0.541	false
2019-03-21T02:00Z	0.542	false
2019-03-21T01:45Z	0.54	false
2019-03-21T01:30Z	0.543	false
2019-03-21T01:15Z	0.537	false
2019-03-21T01:00Z	0.54	false
2019-03-21T00:45Z	0.54	false
2019-03-21T00:30Z	0.541	false
2019-03-21T00:15Z	0.541	false
2019-03-21T00:00Z	0.541	false
2019-03-20T23:45Z	0.543	false
2019-03-20T23:30Z	0.542	false
2019-03-20T23:15Z	0.543	false
2019-03-20T23:00Z	0.539	false
2019-03-20T22:45Z	0.542	false
2019-03-20T22:30Z	0.542	false
2019-03-20T22:15Z	0.54	false
2019-03-20T22:00Z	0.542	false
2019-03-20T21:45Z	0.539	false
2019-03-20T21:30Z	0.544	false
2019-03-20T21:15Z	0.543	false
2019-03-20T21:00Z	0.543	false
2019-03-20T20:45Z	0.541	false
2019-03-20T20:30Z	0.541	false
2019-03-20T20:15Z	0.54	false
2019-03-20T20:00Z	0.541	false
2019-03-20T19:45Z	0.542	false
2019-03-20T19:30Z	0.538	false
2019-03-20T19:15Z	0.54	false
2019-03-20T19:00Z	0.539	false
2019-03-20T18:45Z	0.543	false
2019-03-20T18:30Z	0.539	false
2019-03-20T18:15Z	0.542	false
2019-03-20T18:00Z	0.542	false
2019-03-20T17:45Z	0.542	false
2019-03-20T17:30Z	0.542	false
2019-03-20T17:15Z	0.539	false
2019-03-20T17:00Z	0.54	false
2019-03-20T16:45Z	0.539	false
2019-03-20T16:30Z	0.515	false
2019-03-20T16:15Z	0.515	false
2019-03-20T16:00Z	0.515	false
2019-03-20T15:45Z	0.514	false
2019-03-20T15:30Z	0.519	false
2019-03-20T15:15Z	0.517	false
2019-03-20T15:00Z	0.516	false
2019-03-20T14:45Z	0.515	false
2019-03-20T14:30Z	0.513	false
2019-03-20T14:15Z	0.512	false
2019-03-20T14:00Z	0.517	false
2019-03-20T13:45Z	0.515	false
2019-03-20T13:30Z	0.515	false
2019-03-20T13:15Z	0.517	false
2019-03-20T13:00Z	0.516	false
2019-03-20T12:45Z	0.517	false
2019-03-20T12:30Z	0.515	false
2019-03-20T12:15Z	0.517	false
2019-03-20T12:00Z	0.514	false
2019-03-20T11:45Z	0.517	false
2019-03-20T11:30Z	0.516	false
2019-03-20T11:15Z	0.516	false
2019-03-20T11:00Z	0.517	false
2019-03-20T10:45Z	0.514	false
2019-03-20T10:30Z	0.516	false
2019-03-20T10:15Z	0.515	false
2019-03-20T10:00Z	0.542	false
2019-03-20T09:45Z	0.54	false
2019-03-20T09:30Z	0.541	false
2019-03-20T09:15Z	0.539	false
2019-03-20T09:00Z	0.54	false
2019-03-20T08:45Z	0.537	false
2019-03-20T08:30Z	0.54	false
2019-03-20T08:15Z	0.539	false
2019-03-20T08:00Z	0.537	false
2019-03-20T07:45Z	0.54	false
2019-03-20T07:30Z	0.534	false
2019-03-20T07:15Z	0.535	false
2019-03-20T07:00Z	0.538	false
2019-03-20T06:45Z	0.538	false
2019-03-20T06:30Z	0.538	false
2019-03-20T06:15Z	0.54	false
2019-03-20T06:00Z	0.54	false
2019-03-20T05:45Z	0.539	false
2019-03-20T05:30Z	0.539	false
2019-03-20T05:15Z	0.538	false
2019-03-20T05:00Z	0.54	false
2019-03-20T04:45Z	0.54	false
2019-03-20T04:30Z	0.536	false
2019-03-20T04:15Z	0.54	false
2019-03-20T04:00Z	0.538	false
2019-03-20T03:45Z	0.538	false
2019-03-20T03:30Z	0.536	false
2019-03-20T03:15Z	0.536	false
2019-03-20T03:00Z	0.538	false
2019-03-20T02:45Z	0.54	false
2019-03-20T02:30Z	0.537	false
2019-03-20T02:15Z	0.537	false
2019-03-20T02:00Z	0.54	false
2019-03-20T01:45Z	0.54	false
2019-03-20T01:30Z	0.538	false
2019-03-20T01:15Z	0.538	false
2019-03-20T01:00Z	0.538	false
2019-03-20T00:45Z	0.54	false
2019-03-20T00:30Z	0.539	false
2019-03-20T00:15Z	0.542	false
2019-03-20T00:00Z	0.542	false
2019-03-19T23:45Z	0.54	false
2019-03-19T23:30Z	0.543	false
2019-03-19T23:15Z	0.54	false
2019-03-19T23:00Z	0.538	false
2019-03-19T22:45Z	0.539	false
2019-03-19T22:30Z	0.544	false
2019-03-19T22:15Z	0.544	false
2019-03-19T22:00Z	0.541	false
2019-03-19T21:45Z	0.541	false
2019-03-19T21:30Z	0.542	false
2019-03-19T21:15Z	0.542	false
2019-03-19T21:00Z	0.542	false
2019-03-19T20:45Z	0.544	false
2019-03-19T20:30Z	0.542	false
2019-03-19T20:15Z	0.542	false
2019-03-19T20:00Z	0.542	false
2019-03-19T19:45Z	0.538	false
2019-03-19T19:30Z	0.54	false
2019-03-19T19:15Z	0.541	false
2019-03-19T19:00Z	0.542	false
2019-03-19T18:45Z	0.542	false
2019-03-19T18:30Z	0.543	false
2019-03-19T18:15Z	0.544	false
2019-03-19T18:00Z	0.543	false
2019-03-19T17:45Z	0.544	false
2019-03-19T17:30Z	0.542	false
2019-03-19T17:15Z	0.545	false
2019-03-19T17:00Z	0.543	false
2019-03-19T16:45Z	0.542	false
2019-03-19T16:30Z	0.522	false
2019-03-19T16:15Z	0.518	false
2019-03-19T16:00Z	0.521	false
2019-03-19T15:45Z	0.521	false
2019-03-19T15:30Z	0.52	false
2019-03-19T15:15Z	0.518	false
2019-03-19T15:00Z	0.521	false
2019-03-19T14:45Z	0.517	false
2019-03-19T14:30Z	0.518	false
2019-03-19T14:15Z	0.522	false
2019-03-19T14:00Z	0.519	false
2019-03-19T13:45Z	0.517	false
2019-03-19T13:30Z	0.519	false
2019-03-19T13:15Z	0.516	false
2019-03-19T13:00Z	0.52	false
2019-03-19T12:45Z	0.52	false
2019-03-19T12:30Z	0.519	false
2019-03-19T12:15Z	0.517	false
2019-03-19T04:30Z	0.564	false
2019-03-19T04:15Z	0.567	false
2019-03-19T04:00Z	0.566	false
2019-03-19T03:45Z	0.57	false
2019-03-19T03:30Z	0.566	false
2019-03-19T03:15Z	0.567	false
2019-03-19T03:00Z	0.566	false
2019-03-19T02:45Z	0.572	false
2019-03-19T02:30Z	0.57	false
2019-03-19T02:15Z	0.567	false
2019-03-19T02:00Z	0.568	false
2019-03-19T01:45Z	0.569	false
2019-03-19T01:30Z	0.568	false
2019-03-19T01:15Z	0.568	false
2019-03-19T01:00Z	0.571	false
2019-03-19T00:45Z	0.569	false
2019-03-19T00:30Z	0.567	false
2019-03-19T00:15Z	0.569	false
2019-03-19T00:00Z	0.568	false
2019-03-18T23:45Z	0.57	false
2019-03-18T23:30Z	0.572	false
2019-03-18T23:15Z	0.57	false
2019-03-18T23:00Z	0.57	false
2019-03-18T22:45Z	0.57	false
2019-03-18T22:30Z	0.57	false
2019-03-18T22:15Z	0.57	false
2019-03-18T22:00Z	0.572	false
2019-03-18T21:45Z	0.572	false
2019-03-18T21:30Z	0.57	false
2019-03-18T21:15Z	0.572	false
2019-03-18T21:00Z	0.573	false
2019-03-18T20:45Z	0.57	false
2019-03-18T20:30Z	0.57	false
2019-03-18T20:15Z	0.569	false
2019-03-18T20:00Z	0.57	false
2019-03-18T19:45Z	0.569	false
2019-03-18T19:30Z	0.533	false
2019-03-18T19:15Z	0.516	false
2019-03-18T19:00Z	0.517	false
2019-03-18T18:45Z	0.518	false
2019-03-18T18:30Z	0.527	false
2019-03-18T18:15Z	0.518	false
2019-03-18T18:00Z	0.558	false
2019-03-18T17:45Z	0.559	false
2019-03-18T17:30Z	0.556	false
2019-03-18T17:15Z	0.556	false
2019-03-18T17:00Z	0.519	false
2019-03-18T16:45Z	0.518	false
2019-03-18T16:30Z	0.522	false
2019-03-18T16:15Z	0.518	false
2019-03-18T16:00Z	0.517	false
2019-03-18T15:45Z	0.52	false
2019-03-18T15:30Z	0.518	false
2019-03-18T15:15Z	0.519	false
2019-03-18T15:00Z	0.521	false
2019-03-18T14:45Z	0.519	false
2019-03-18T14:30Z	0.519	false
2019-03-18T14:15Z	0.52	false
2019-03-18T14:00Z	0.523	false
2019-03-18T13:45Z	0.518	false
2019-03-18T13:30Z	0.519	false
2019-03-18T13:15Z	0.522	false
2019-03-18T13:00Z	0.52	false
2019-03-18T12:45Z	0.519	false
2019-03-18T12:30Z	0.518	false
2019-03-18T12:15Z	0.519	false
2019-03-18T12:00Z	0.517	false
2019-03-18T11:45Z	0.518	false
2019-03-18T11:30Z	0.518	false
2019-03-18T11:15Z	0.518	false
2019-03-18T11:00Z	0.52	false
2019-03-18T10:45Z	0.522	false
2019-03-18T10:30Z	0.522	false
2019-03-18T10:15Z	0.521	false
2019-03-18T10:00Z	0.519	false
2019-03-18T09:45Z	0.524	false
2019-03-18T09:30Z	0.562	false
2019-03-18T09:15Z	0.563	false
2019-03-18T09:00Z	0.564	false
2019-03-18T08:45Z	0.559	false
2019-03-18T08:30Z	0.563	false
2019-03-18T08:15Z	0.561	false
2019-03-18T08:00Z	0.561	false
2019-03-18T07:45Z	0.563	false
2019-03-18T07:30Z	0.562	false
2019-03-18T07:15Z	0.562	false
2019-03-18T07:00Z	0.561	false
2019-03-18T06:45Z	0.559	false
2019-03-18T06:30Z	0.562	false
2019-03-18T06:15Z	0.562	false
2019-03-18T06:00Z	0.562	false
2019-03-18T05:45Z	0.561	false
2019-03-18T05:30Z	0.563	false
2019-03-18T05:15Z	0.561	false
2019-03-18T05:00Z	0.565	false
2019-03-18T04:45Z	0.563	false
2019-03-18T04:30Z	0.561	false
2019-03-18T04:15Z	0.563	false
2019-03-18T04:00Z	0.563	false
2019-03-18T03:45Z	0.564	false
2019-03-18T03:30Z	0.563	false
2019-03-18T03:15Z	0.561	false
2019-03-18T03:00Z	0.564	false
2019-03-18T02:45Z	0.564	false
2019-03-18T02:30Z	0.567	false
2019-03-18T02:15Z	0.566	false
2019-03-18T02:00Z	0.565	false
2019-03-18T01:45Z	0.565	false
2019-03-18T01:30Z	0.567	false
2019-03-18T01:15Z	0.565	false
2019-03-18T01:00Z	0.563	false
2019-03-18T00:45Z	0.564	false
2019-03-18T00:30Z	0.565	false
2019-03-18T00:15Z	0.566	false
2019-03-18T00:00Z	0.568	false
2019-03-17T23:45Z	0.565	false
2019-03-17T23:30Z	0.566	false
2019-03-17T23:15Z	0.567	false
2019-03-17T23:00Z	0.568	false
2019-03-17T22:45Z	0.567	false
2019-03-17T22:30Z	0.573	false
2019-03-17T22:15Z	0.569	false
2019-03-17T22:00Z	0.569	false
2019-03-17T21:45Z	0.57	false
2019-03-17T21:30Z	0.567	false
2019-03-17T21:15Z	0.568	false
2019-03-17T21:00Z	0.57	false
2019-03-17T20:45Z	0.57	false
2019-03-17T20:30Z	0.57	false
2019-03-17T20:15Z	0.569	false
2019-03-17T20:00Z	0.569	false
2019-03-17T19:45Z	0.568	false
2019-03-17T19:30Z	0.569	false
2019-03-17T19:15Z	0.57	false
2019-03-17T19:00Z	0.57	false
2019-03-17T18:45Z	0.569	false
2019-03-17T18:30Z	0.571	false
2019-03-17T18:15Z	0.573	false
2019-03-17T18:00Z	0.571	false
2019-03-17T17:45Z	0.573	false
2019-03-17T17:30Z	0.573	false
2019-03-17T17:15Z	0.574	false
2019-03-17T17:00Z	0.572	false
2019-03-17T16:45Z	0.572	false
2019-03-17T16:30Z	0.575	false
2019-03-17T16:15Z	0.572	false
2019-03-17T16:00Z	0.533	false
2019-03-17T15:45Z	0.527	false
2019-03-17T15:30Z	0.53	false
2019-03-17T15:15Z	0.527	false
2019-03-17T15:00Z	0.531	false
2019-03-17T14:45Z	0.531	false
2019-03-17T14:30Z	0.531	false
2019-03-17T14:15Z	0.531	false
2019-03-17T14:00Z	0.533	false
2019-03-17T13:45Z	0.528	false
2019-03-17T13:30Z	0.53	false
2019-03-17T13:15Z	0.527	false
2019-03-17T13:00Z	0.531	false
2019-03-17T12:45Z	0.533	false
2019-03-17T12:30Z	0.531	false
2019-03-17T12:15Z	0.53	false
2019-03-17T12:00Z	0.53	false
2019-03-17T11:45Z	0.53	false
2019-03-17T11:30Z	0.531	false
2019-03-17T11:15Z	0.531	false
2019-03-17T11:00Z	0.587	false
2019-03-17T10:45Z	0.585	false
2019-03-17T10:30Z	0.582	false
2019-03-17T10:15Z	0.535	false
2019-03-17T10:00Z	0.57	false
2019-03-17T09:45Z	0.569	false
2019-03-17T09:30Z	0.57	false
2019-03-17T09:15Z	0.571	false
2019-03-17T09:00Z	0.568	false
2019-03-17T08:45Z	0.57	false
2019-03-17T08:30Z	0.57	false
2019-03-17T08:15Z	0.569	false
2019-03-17T08:00Z	0.573	false
2019-03-17T07:45Z	0.572	false
2019-03-17T07:30Z	0.572	false
2019-03-17T07:15Z	0.569	false
2019-03-17T07:00Z	0.573	false
2019-03-17T06:45Z	0.569	false
2019-03-17T06:30Z	0.572	false
2019-03-17T06:15Z	0.571	false
2019-03-17T06:00Z	0.57	false
2019-03-17T05:45Z	0.572	false
2019-03-17T05:30Z	0.57	false
2019-03-17T05:15Z	0.569	false
2019-03-17T05:00Z	0.571	false
2019-03-17T04:45Z	0.568	false
2019-03-17T04:30Z	0.571	false
2019-03-17T04:15Z	0.568	false
2019-03-17T04:00Z	0.569	false
2019-03-17T03:45Z	0.567	false
2019-03-17T03:30Z	0.57	false
2019-03-17T03:15Z	0.568	false
2019-03-17T03:00Z	0.567	false
2019-03-17T02:45Z	0.567	false
2019-03-17T02:30Z	0.568	false
2019-03-17T02:15Z	0.571	false
2019-03-17T02:00Z	0.566	false
2019-03-17T01:45Z	0.569	false
2019-03-17T01:30Z	0.57	false
2019-03-17T01:15Z	0.57	false
2019-03-17T01:00Z	0.568	false
2019-03-17T00:45Z	0.569	false
2019-03-17T00:30Z	0.566	false
2019-03-17T00:15Z	0.567	false
2019-03-17T00:00Z	0.569	false
2019-03-16T23:45Z	0.567	false
2019-03-16T23:30Z	0.568	false
2019-03-16T23:15Z	0.569	false
2019-03-16T23:00Z	0.569	false
2019-03-16T22:45Z	0.57	false
2019-03-16T22:30Z	0.57	false
2019-03-16T22:15Z	0.568	false
2019-03-16T22:00Z	0.571	false
2019-03-16T21:45Z	0.571	false
2019-03-16T21:30Z	0.571	false
2019-03-16T21:15Z	0.572	false
2019-03-16T21:00Z	0.567	false
2019-03-16T20:45Z	0.564	false
2019-03-16T20:30Z	0.558	false
2019-03-16T20:15Z	0.558	false
2019-03-16T20:00Z	0.554	false
2019-03-16T19:45Z	0.554	false
2019-03-16T19:30Z	0.554	false
2019-03-16T19:15Z	0.554	false
2019-03-16T19:00Z	0.555	false
2019-03-16T18:45Z	0.555	false
2019-03-16T18:30Z	0.556	false
2019-03-16T18:15Z	0.552	false
2019-03-16T18:00Z	0.55	false
2019-03-16T17:45Z	0.553	false
2019-03-16T17:30Z	0.554	false
2019-03-16T17:15Z	0.555	false
2019-03-16T17:00Z	0.555	false
2019-03-16T16:45Z	0.519	false
2019-03-16T16:30Z	0.516	false
2019-03-16T16:15Z	0.537	false
2019-03-16T16:00Z	0.515	false
2019-03-16T15:45Z	0.516	false
2019-03-16T15:30Z	0.512	false
2019-03-16T15:15Z	0.514	false
2019-03-16T15:00Z	0.514	false
2019-03-16T14:45Z	0.513	false
2019-03-16T14:30Z	0.515	false
2019-03-16T14:15Z	0.516	false
2019-03-16T14:00Z	0.516	false
2019-03-16T13:45Z	0.516	false
2019-03-16T13:30Z	0.516	false
2019-03-16T13:15Z	0.514	false
2019-03-16T13:00Z	0.515	false
2019-03-16T12:45Z	0.514	false
2019-03-16T12:30Z	0.513	false
2019-03-16T12:15Z	0.517	false
2019-03-16T12:00Z	0.511	false
2019-03-16T11:45Z	0.515	false
2019-03-16T11:30Z	0.511	false
2019-03-16T11:15Z	0.514	false
2019-03-16T11:00Z	0.513	false
2019-03-16T10:45Z	0.513	false
2019-03-16T10:30Z	0.513	false
2019-03-16T10:15Z	0.519	false
2019-03-16T10:00Z	0.518	false
2019-03-16T09:45Z	0.529	false
2019-03-16T09:30Z	0.528	false
2019-03-16T09:15Z	0.528	false
2019-03-16T09:00Z	0.527	false
2019-03-16T08:45Z	0.525	false
2019-03-16T08:30Z	0.527	false
2019-03-16T08:15Z	0.526	false
2019-03-16T08:00Z	0.528	false
2019-03-16T07:45Z	0.526	false
2019-03-16T07:30Z	0.527	false
2019-03-16T07:15Z	0.528	false
2019-03-16T07:00Z	0.527	false
2019-03-16T06:45Z	0.524	false
2019-03-16T06:30Z	0.526	false
2019-03-16T06:15Z	0.526	false
2019-03-16T06:00Z	0.527	false
2019-03-16T05:45Z	0.526	false
2019-03-16T05:30Z	0.527	false
2019-03-16T05:15Z	0.525	false
2019-03-16T05:00Z	0.525	false
2019-03-16T04:45Z	0.524	false

Forecast data

Key information

• Station name: City Mill
• Station ID: 1052
• River name: River Itchen
• Typical range: 0.39m to 0.78m
• Highest level on record: 1.28m on 12 February 2014
• Site datum: 34.72mAOD (what does this mean?)

How are river levels measured?

The Environment agency uses a network of monitoring stations across the country. Each one has its own datum - a height in metres fixed relative to mean sea level. This height is expressed as metres above ordnance datum (mAOD). The river levels we provide for each monitoring station are all relative to its site datum.

If we didn't do this, we'd show some very high measurements, which could cause confusion. By using a local site datum, the river levels are easier to understand, especially by users familiar with the data from a particular monitoring station.

A river's height above ordnance datum can be seen by adding the site datum to the river level.

How often are river levels measured?

We use measuring stations like this one to collect water level data, usually once or twice a day. We collect data more frequently when there's a greater risk of flooding. That's why the graph might show a short time lag since the last measurement.

How might river levels affect flood risk?

Typical range

This is the usual range of river levels at this station, based on historical data.

Above typical

This means that flooding is possible because river levels at this station are currently higher than usual.
Many factors can influence the possibility of flooding - river levels are only one indicator. Always check if there's a flood warning in place at a particular location.

Below typical

This means that river levels at this station are currently lower than usual.
Drought or water management measures may be in place. Please check for the latest information on water resources and restrictions in your area.

• View nearby measuring stations

• View the flood information service for England
• View your property's long term risk of flooding

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