River level River Bulbourne at Hemel Hempstead, Old Fishery Lane

Check for flood warnings in this area

Latest recorded level 0.81m at 5:30am Friday 10 July 2020.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 1.99m here, minor flooding is possible in this area
• Highest recorded level. Hide
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Observed data

DateTime	Value	Error
2020-07-10T04:30Z	0.806	false
2020-07-10T04:15Z	0.806	false
2020-07-10T04:00Z	0.807	false
2020-07-10T03:45Z	0.806	false
2020-07-10T03:30Z	0.808	false
2020-07-10T03:15Z	0.81	false
2020-07-10T03:00Z	0.811	false
2020-07-10T02:45Z	0.81	false
2020-07-10T02:30Z	0.813	false
2020-07-10T02:15Z	0.813	false
2020-07-10T02:00Z	0.813	false
2020-07-10T01:45Z	0.813	false
2020-07-10T01:30Z	0.814	false
2020-07-10T01:15Z	0.814	false
2020-07-10T01:00Z	0.815	false
2020-07-10T00:45Z	0.815	false
2020-07-10T00:30Z	0.815	false
2020-07-10T00:15Z	0.815	false
2020-07-10T00:00Z	0.815	false
2020-07-09T23:45Z	0.816	false
2020-07-09T23:30Z	0.817	false
2020-07-09T23:15Z	0.816	false
2020-07-09T23:00Z	0.815	false
2020-07-09T22:45Z	0.814	false
2020-07-09T22:30Z	0.814	false
2020-07-09T22:15Z	0.814	false
2020-07-09T22:00Z	0.812	false
2020-07-09T21:45Z	0.811	false
2020-07-09T21:30Z	0.809	false
2020-07-09T21:15Z	0.809	false
2020-07-09T21:00Z	0.809	false
2020-07-09T20:45Z	0.808	false
2020-07-09T20:30Z	0.808	false
2020-07-09T20:15Z	0.808	false
2020-07-09T20:00Z	0.811	false
2020-07-09T19:45Z	0.813	false
2020-07-09T19:30Z	0.817	false
2020-07-09T19:15Z	0.82	false
2020-07-09T19:00Z	0.828	false
2020-07-09T18:45Z	0.843	false
2020-07-09T18:30Z	0.868	false
2020-07-09T18:15Z	0.855	false
2020-07-09T18:00Z	0.803	false
2020-07-09T17:45Z	0.805	false
2020-07-09T17:30Z	0.808	false
2020-07-09T17:15Z	0.808	false
2020-07-09T17:00Z	0.808	false
2020-07-09T16:45Z	0.8	false
2020-07-09T16:30Z	0.802	false
2020-07-09T16:15Z	0.801	false
2020-07-09T16:00Z	0.803	false
2020-07-09T15:45Z	0.805	false
2020-07-09T15:30Z	0.808	false
2020-07-09T15:15Z	0.816	false
2020-07-09T15:00Z	0.833	false
2020-07-09T14:45Z	0.862	false
2020-07-09T14:30Z	0.897	false
2020-07-09T14:15Z	0.874	false
2020-07-09T14:00Z	0.829	false
2020-07-09T13:45Z	0.792	false
2020-07-09T13:30Z	0.792	false
2020-07-09T13:15Z	0.789	false
2020-07-09T13:00Z	0.79	false
2020-07-09T12:45Z	0.793	false
2020-07-09T12:30Z	0.793	false
2020-07-09T12:15Z	0.788	false
2020-07-09T12:00Z	0.783	false
2020-07-09T11:45Z	0.782	false
2020-07-09T11:30Z	0.784	false
2020-07-09T11:15Z	0.785	false
2020-07-09T11:00Z	0.784	false
2020-07-09T10:45Z	0.78	false
2020-07-09T10:30Z	0.78	false
2020-07-09T10:15Z	0.781	false
2020-07-09T10:00Z	0.779	false
2020-07-09T09:45Z	0.778	false
2020-07-09T09:30Z	0.776	false
2020-07-09T09:15Z	0.777	false
2020-07-09T09:00Z	0.778	false
2020-07-09T08:45Z	0.783	false
2020-07-09T08:30Z	0.785	false
2020-07-09T08:15Z	0.784	false
2020-07-09T08:00Z	0.785	false
2020-07-09T07:45Z	0.785	false
2020-07-09T07:30Z	0.785	false
2020-07-09T07:15Z	0.787	false
2020-07-09T07:00Z	0.785	false
2020-07-09T06:45Z	0.786	false
2020-07-09T06:30Z	0.786	false
2020-07-09T06:15Z	0.785	false
2020-07-09T06:00Z	0.785	false
2020-07-09T05:45Z	0.788	false
2020-07-09T05:30Z	0.788	false
2020-07-09T05:15Z	0.79	false
2020-07-09T05:00Z	0.788	false
2020-07-09T04:45Z	0.789	false
2020-07-09T04:30Z	0.789	false
2020-07-09T04:15Z	0.791	false
2020-07-09T04:00Z	0.793	false
2020-07-09T03:45Z	0.792	false
2020-07-09T03:30Z	0.791	false
2020-07-09T03:15Z	0.792	false
2020-07-09T03:00Z	0.791	false
2020-07-09T02:45Z	0.793	false
2020-07-09T02:30Z	0.793	false
2020-07-09T02:15Z	0.795	false
2020-07-09T02:00Z	0.796	false
2020-07-09T01:45Z	0.798	false
2020-07-09T01:30Z	0.8	false
2020-07-09T01:15Z	0.8	false
2020-07-09T01:00Z	0.795	false
2020-07-09T00:45Z	0.793	false
2020-07-09T00:30Z	0.792	false
2020-07-09T00:15Z	0.792	false
2020-07-09T00:00Z	0.792	false
2020-07-08T23:45Z	0.791	false
2020-07-08T23:30Z	0.792	false
2020-07-08T23:15Z	0.792	false
2020-07-08T23:00Z	0.792	false
2020-07-08T22:45Z	0.792	false
2020-07-08T22:30Z	0.791	false
2020-07-08T22:15Z	0.792	false
2020-07-08T22:00Z	0.791	false
2020-07-08T21:45Z	0.791	false
2020-07-08T21:30Z	0.791	false
2020-07-08T21:15Z	0.793	false
2020-07-08T21:00Z	0.793	false
2020-07-08T20:45Z	0.793	false
2020-07-08T20:30Z	0.793	false
2020-07-08T20:15Z	0.795	false
2020-07-08T20:00Z	0.797	false
2020-07-08T19:45Z	0.8	false
2020-07-08T19:30Z	0.804	false
2020-07-08T19:15Z	0.805	false
2020-07-08T19:00Z	0.806	false
2020-07-08T18:45Z	0.813	false
2020-07-08T18:30Z	0.811	false
2020-07-08T18:15Z	0.804	false
2020-07-08T18:00Z	0.806	false
2020-07-08T17:45Z	0.807	false
2020-07-08T17:30Z	0.806	false
2020-07-08T17:15Z	0.806	false
2020-07-08T17:00Z	0.808	false
2020-07-08T16:45Z	0.805	false
2020-07-08T16:30Z	0.806	false
2020-07-08T16:15Z	0.806	false
2020-07-08T16:00Z	0.805	false
2020-07-08T15:45Z	0.801	false
2020-07-08T15:30Z	0.797	false
2020-07-08T15:15Z	0.797	false
2020-07-08T15:00Z	0.802	false
2020-07-08T14:45Z	0.808	false
2020-07-08T14:30Z	0.808	false
2020-07-08T14:15Z	0.806	false
2020-07-08T14:00Z	0.804	false
2020-07-08T13:45Z	0.801	false
2020-07-08T13:30Z	0.802	false
2020-07-08T13:15Z	0.8	false
2020-07-08T13:00Z	0.8	false
2020-07-08T12:45Z	0.796	false
2020-07-08T12:30Z	0.794	false
2020-07-08T12:15Z	0.79	false
2020-07-08T12:00Z	0.784	false
2020-07-08T11:45Z	0.776	false
2020-07-08T11:30Z	0.769	false
2020-07-08T11:15Z	0.769	false
2020-07-08T11:00Z	0.777	false
2020-07-08T10:45Z	0.783	false
2020-07-08T10:30Z	0.787	false
2020-07-08T10:15Z	0.789	false
2020-07-08T10:00Z	0.785	false
2020-07-08T09:45Z	0.777	false
2020-07-08T09:30Z	0.772	false
2020-07-08T09:15Z	0.773	false
2020-07-08T09:00Z	0.78	false
2020-07-08T08:45Z	0.781	false
2020-07-08T08:30Z	0.783	false
2020-07-08T08:15Z	0.785	false
2020-07-08T08:00Z	0.787	false
2020-07-08T07:45Z	0.787	false
2020-07-08T07:30Z	0.789	false
2020-07-08T07:15Z	0.793	false
2020-07-08T07:00Z	0.795	false
2020-07-08T06:45Z	0.799	false
2020-07-08T06:30Z	0.805	false
2020-07-08T06:15Z	0.811	false
2020-07-08T06:00Z	0.823	false
2020-07-08T05:45Z	0.824	false
2020-07-08T05:30Z	0.822	false
2020-07-08T05:15Z	0.817	false
2020-07-08T05:00Z	0.818	false
2020-07-08T04:45Z	0.808	false
2020-07-08T04:30Z	0.797	false
2020-07-08T04:15Z	0.782	false
2020-07-08T04:00Z	0.78	false
2020-07-08T03:45Z	0.78	false
2020-07-08T03:30Z	0.778	false
2020-07-08T03:15Z	0.779	false
2020-07-08T03:00Z	0.78	false
2020-07-08T02:45Z	0.778	false
2020-07-08T02:30Z	0.78	false
2020-07-08T02:15Z	0.78	false
2020-07-08T02:00Z	0.779	false
2020-07-08T01:45Z	0.78	false
2020-07-08T01:30Z	0.78	false
2020-07-08T01:15Z	0.781	false
2020-07-08T01:00Z	0.781	false
2020-07-08T00:45Z	0.779	false
2020-07-08T00:30Z	0.779	false
2020-07-08T00:15Z	0.778	false
2020-07-08T00:00Z	0.78	false
2020-07-07T23:45Z	0.78	false
2020-07-07T23:30Z	0.782	false
2020-07-07T23:15Z	0.785	false
2020-07-07T23:00Z	0.785	false
2020-07-07T22:45Z	0.784	false
2020-07-07T22:30Z	0.781	false
2020-07-07T22:15Z	0.78	false
2020-07-07T22:00Z	0.779	false
2020-07-07T21:45Z	0.777	false
2020-07-07T21:30Z	0.78	false
2020-07-07T21:15Z	0.78	false
2020-07-07T21:00Z	0.783	false
2020-07-07T20:45Z	0.784	false
2020-07-07T20:30Z	0.786	false
2020-07-07T20:15Z	0.787	false
2020-07-07T20:00Z	0.79	false
2020-07-07T19:45Z	0.793	false
2020-07-07T19:30Z	0.795	false
2020-07-07T19:15Z	0.795	false
2020-07-07T19:00Z	0.798	false
2020-07-07T18:45Z	0.801	false
2020-07-07T18:30Z	0.801	false
2020-07-07T18:15Z	0.798	false
2020-07-07T18:00Z	0.793	false
2020-07-07T17:45Z	0.787	false
2020-07-07T17:30Z	0.785	false
2020-07-07T17:15Z	0.786	false
2020-07-07T17:00Z	0.794	false
2020-07-07T16:45Z	0.796	false
2020-07-07T16:30Z	0.799	false
2020-07-07T16:15Z	0.8	false
2020-07-07T16:00Z	0.801	false
2020-07-07T15:45Z	0.804	false
2020-07-07T15:30Z	0.803	false
2020-07-07T15:15Z	0.805	false
2020-07-07T15:00Z	0.805	false
2020-07-07T14:45Z	0.807	false
2020-07-07T14:30Z	0.808	false
2020-07-07T14:15Z	0.805	false
2020-07-07T14:00Z	0.804	false
2020-07-07T13:45Z	0.805	false
2020-07-07T13:30Z	0.8	false
2020-07-07T13:15Z	0.798	false
2020-07-07T13:00Z	0.798	false
2020-07-07T12:45Z	0.8	false
2020-07-07T12:30Z	0.806	false
2020-07-07T12:15Z	0.812	false
2020-07-07T12:00Z	0.811	false
2020-07-07T11:45Z	0.806	false
2020-07-07T11:30Z	0.804	false
2020-07-07T11:15Z	0.801	false
2020-07-07T11:00Z	0.796	false
2020-07-07T10:45Z	0.796	false
2020-07-07T10:30Z	0.797	false
2020-07-07T10:15Z	0.8	false
2020-07-07T10:00Z	0.793	false
2020-07-07T09:45Z	0.787	false
2020-07-07T09:30Z	0.78	false
2020-07-07T09:15Z	0.776	false
2020-07-07T09:00Z	0.773	false
2020-07-07T08:45Z	0.772	false
2020-07-07T08:30Z	0.776	false
2020-07-07T08:15Z	0.778	false
2020-07-07T08:00Z	0.785	false
2020-07-07T07:45Z	0.787	false
2020-07-07T07:30Z	0.787	false
2020-07-07T07:15Z	0.786	false
2020-07-07T07:00Z	0.787	false
2020-07-07T06:45Z	0.786	false
2020-07-07T06:30Z	0.788	false
2020-07-07T06:15Z	0.785	false
2020-07-07T06:00Z	0.786	false
2020-07-07T05:45Z	0.786	false
2020-07-07T05:30Z	0.786	false
2020-07-07T05:15Z	0.787	false
2020-07-07T05:00Z	0.788	false
2020-07-07T04:45Z	0.789	false
2020-07-07T04:30Z	0.786	false
2020-07-07T04:15Z	0.786	false
2020-07-07T04:00Z	0.787	false
2020-07-07T03:45Z	0.789	false
2020-07-07T03:30Z	0.786	false
2020-07-07T03:15Z	0.785	false
2020-07-07T03:00Z	0.788	false
2020-07-07T02:45Z	0.786	false
2020-07-07T02:30Z	0.787	false
2020-07-07T02:15Z	0.785	false
2020-07-07T02:00Z	0.784	false
2020-07-07T01:45Z	0.785	false
2020-07-07T01:30Z	0.784	false
2020-07-07T01:15Z	0.783	false
2020-07-07T01:00Z	0.782	false
2020-07-07T00:45Z	0.782	false
2020-07-07T00:30Z	0.782	false
2020-07-07T00:15Z	0.779	false
2020-07-07T00:00Z	0.781	false
2020-07-06T23:45Z	0.777	false
2020-07-06T23:30Z	0.778	false
2020-07-06T23:15Z	0.779	false
2020-07-06T23:00Z	0.776	false
2020-07-06T22:45Z	0.776	false
2020-07-06T22:30Z	0.776	false
2020-07-06T22:15Z	0.773	false
2020-07-06T22:00Z	0.773	false
2020-07-06T21:45Z	0.775	false
2020-07-06T21:30Z	0.774	false
2020-07-06T21:15Z	0.775	false
2020-07-06T21:00Z	0.774	false
2020-07-06T20:45Z	0.776	false
2020-07-06T20:30Z	0.775	false
2020-07-06T20:15Z	0.775	false
2020-07-06T20:00Z	0.776	false
2020-07-06T19:45Z	0.774	false
2020-07-06T19:30Z	0.774	false
2020-07-06T19:15Z	0.774	false
2020-07-06T19:00Z	0.778	false
2020-07-06T18:45Z	0.781	false
2020-07-06T18:30Z	0.784	false
2020-07-06T18:15Z	0.784	false
2020-07-06T18:00Z	0.779	false
2020-07-06T17:45Z	0.778	false
2020-07-06T17:30Z	0.771	false
2020-07-06T17:15Z	0.768	false
2020-07-06T17:00Z	0.773	false
2020-07-06T16:45Z	0.782	false
2020-07-06T16:30Z	0.793	false
2020-07-06T16:15Z	0.801	false
2020-07-06T16:00Z	0.809	false
2020-07-06T15:45Z	0.809	false
2020-07-06T15:30Z	0.806	false
2020-07-06T15:15Z	0.805	false
2020-07-06T15:00Z	0.81	false
2020-07-06T14:45Z	0.808	false
2020-07-06T14:30Z	0.809	false
2020-07-06T14:15Z	0.805	false
2020-07-06T14:00Z	0.797	false
2020-07-06T13:45Z	0.787	false
2020-07-06T13:30Z	0.789	false
2020-07-06T13:15Z	0.797	false
2020-07-06T13:00Z	0.798	false
2020-07-06T12:45Z	0.797	false
2020-07-06T12:30Z	0.794	false
2020-07-06T12:15Z	0.793	false
2020-07-06T12:00Z	0.79	false
2020-07-06T11:45Z	0.79	false
2020-07-06T11:30Z	0.786	false
2020-07-06T11:15Z	0.781	false
2020-07-06T11:00Z	0.786	false
2020-07-06T10:45Z	0.79	false
2020-07-06T10:30Z	0.794	false
2020-07-06T10:15Z	0.785	false
2020-07-06T10:00Z	0.78	false
2020-07-06T09:45Z	0.78	false
2020-07-06T09:30Z	0.78	false
2020-07-06T09:15Z	0.786	false
2020-07-06T09:00Z	0.788	false
2020-07-06T08:45Z	0.788	false
2020-07-06T08:30Z	0.791	false
2020-07-06T08:15Z	0.792	false
2020-07-06T08:00Z	0.791	false
2020-07-06T07:45Z	0.789	false
2020-07-06T07:30Z	0.792	false
2020-07-06T07:15Z	0.791	false
2020-07-06T07:00Z	0.793	false
2020-07-06T06:45Z	0.793	false
2020-07-06T06:30Z	0.793	false
2020-07-06T06:15Z	0.792	false
2020-07-06T06:00Z	0.793	false
2020-07-06T05:45Z	0.793	false
2020-07-06T05:30Z	0.793	false
2020-07-06T05:15Z	0.796	false
2020-07-06T05:00Z	0.793	false
2020-07-06T04:45Z	0.794	false
2020-07-06T04:30Z	0.791	false
2020-07-06T04:15Z	0.793	false
2020-07-06T04:00Z	0.794	false
2020-07-06T03:45Z	0.793	false
2020-07-06T03:30Z	0.788	false
2020-07-06T03:15Z	0.788	false
2020-07-06T03:00Z	0.793	false
2020-07-06T02:45Z	0.79	false
2020-07-06T02:30Z	0.788	false
2020-07-06T02:15Z	0.784	false
2020-07-06T02:00Z	0.785	false
2020-07-06T01:45Z	0.785	false
2020-07-06T01:30Z	0.784	false
2020-07-06T01:15Z	0.782	false
2020-07-06T01:00Z	0.78	false
2020-07-06T00:45Z	0.777	false
2020-07-06T00:30Z	0.775	false
2020-07-06T00:15Z	0.774	false
2020-07-06T00:00Z	0.772	false
2020-07-05T23:45Z	0.772	false
2020-07-05T23:30Z	0.769	false
2020-07-05T23:15Z	0.768	false
2020-07-05T23:00Z	0.768	false
2020-07-05T22:45Z	0.765	false
2020-07-05T22:30Z	0.765	false
2020-07-05T22:15Z	0.763	false
2020-07-05T22:00Z	0.762	false
2020-07-05T21:45Z	0.762	false
2020-07-05T21:30Z	0.765	false
2020-07-05T21:15Z	0.763	false
2020-07-05T21:00Z	0.765	false
2020-07-05T20:45Z	0.764	false
2020-07-05T20:30Z	0.765	false
2020-07-05T20:15Z	0.765	false
2020-07-05T20:00Z	0.765	false
2020-07-05T19:45Z	0.765	false
2020-07-05T19:30Z	0.769	false
2020-07-05T19:15Z	0.768	false
2020-07-05T19:00Z	0.773	false
2020-07-05T18:45Z	0.777	false
2020-07-05T18:30Z	0.781	false
2020-07-05T18:15Z	0.78	false
2020-07-05T18:00Z	0.781	false
2020-07-05T17:45Z	0.786	false
2020-07-05T17:30Z	0.781	false
2020-07-05T17:15Z	0.784	false
2020-07-05T17:00Z	0.783	false
2020-07-05T16:45Z	0.778	false
2020-07-05T16:30Z	0.772	false
2020-07-05T16:15Z	0.767	false
2020-07-05T16:00Z	0.763	false
2020-07-05T15:45Z	0.769	false
2020-07-05T15:30Z	0.777	false
2020-07-05T15:15Z	0.783	false
2020-07-05T15:00Z	0.786	false
2020-07-05T14:45Z	0.786	false
2020-07-05T14:30Z	0.785	false
2020-07-05T14:15Z	0.783	false
2020-07-05T14:00Z	0.786	false
2020-07-05T13:45Z	0.784	false
2020-07-05T13:30Z	0.784	false
2020-07-05T13:15Z	0.781	false
2020-07-05T13:00Z	0.785	false
2020-07-05T12:45Z	0.782	false
2020-07-05T12:30Z	0.784	false
2020-07-05T12:15Z	0.784	false
2020-07-05T12:00Z	0.783	false
2020-07-05T11:45Z	0.784	false
2020-07-05T11:30Z	0.786	false
2020-07-05T11:15Z	0.787	false
2020-07-05T11:00Z	0.794	false
2020-07-05T10:45Z	0.792	false
2020-07-05T10:30Z	0.789	false
2020-07-05T10:15Z	0.789	false
2020-07-05T10:00Z	0.786	false
2020-07-05T09:45Z	0.785	false
2020-07-05T09:30Z	0.789	false
2020-07-05T09:15Z	0.793	false
2020-07-05T09:00Z	0.793	false
2020-07-05T08:45Z	0.788	false
2020-07-05T08:30Z	0.789	false
2020-07-05T08:15Z	0.79	false
2020-07-05T08:00Z	0.79	false
2020-07-05T07:45Z	0.791	false
2020-07-05T07:30Z	0.789	false
2020-07-05T07:15Z	0.79	false
2020-07-05T07:00Z	0.789	false
2020-07-05T06:45Z	0.79	false
2020-07-05T06:30Z	0.79	false
2020-07-05T06:15Z	0.789	false
2020-07-05T06:00Z	0.792	false
2020-07-05T05:45Z	0.792	false
2020-07-05T05:30Z	0.791	false
2020-07-05T05:15Z	0.79	false
2020-07-05T05:00Z	0.793	false
2020-07-05T04:45Z	0.793	false

Forecast data

Key information

• Station name: Hemel Hempstead, Old Fishery Lane
• Station ID: 7186
• River name: River Bulbourne
• Typical range: 0.64m to 1.99m
• Highest level on record: 1.80m on 23 September 1992
• Site datum: 83.07mAOD (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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