River level Nunney Brook at Holwell

Check for flood warnings in this area

Latest recorded level 0.82m at 4:00am Monday 30 November 2020.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 2.00m 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
2020-11-30T04:00Z	0.818	false
2020-11-30T03:45Z	0.818	false
2020-11-30T03:30Z	0.818	false
2020-11-30T03:15Z	0.818	false
2020-11-30T03:00Z	0.818	false
2020-11-30T02:45Z	0.818	false
2020-11-30T02:30Z	0.818	false
2020-11-30T02:15Z	0.818	false
2020-11-30T02:00Z	0.819	false
2020-11-30T01:45Z	0.82	false
2020-11-30T01:30Z	0.82	false
2020-11-30T01:15Z	0.82	false
2020-11-30T01:00Z	0.82	false
2020-11-30T00:45Z	0.822	false
2020-11-30T00:30Z	0.821	false
2020-11-30T00:15Z	0.821	false
2020-11-30T00:00Z	0.822	false
2020-11-29T23:45Z	0.821	false
2020-11-29T23:30Z	0.822	false
2020-11-29T23:15Z	0.822	false
2020-11-29T23:00Z	0.822	false
2020-11-29T22:45Z	0.823	false
2020-11-29T22:30Z	0.823	false
2020-11-29T22:15Z	0.823	false
2020-11-29T22:00Z	0.824	false
2020-11-29T21:45Z	0.823	false
2020-11-29T21:30Z	0.825	false
2020-11-29T21:15Z	0.825	false
2020-11-29T21:00Z	0.825	false
2020-11-29T20:45Z	0.827	false
2020-11-29T20:30Z	0.827	false
2020-11-29T20:15Z	0.827	false
2020-11-29T20:00Z	0.827	false
2020-11-29T19:45Z	0.828	false
2020-11-29T19:30Z	0.828	false
2020-11-29T19:15Z	0.829	false
2020-11-29T19:00Z	0.829	false
2020-11-29T18:45Z	0.83	false
2020-11-29T18:30Z	0.829	false
2020-11-29T18:15Z	0.829	false
2020-11-29T18:00Z	0.829	false
2020-11-29T17:45Z	0.828	false
2020-11-29T17:30Z	0.827	false
2020-11-29T17:15Z	0.826	false
2020-11-29T17:00Z	0.825	false
2020-11-29T16:45Z	0.825	false
2020-11-29T16:30Z	0.825	false
2020-11-29T16:15Z	0.825	false
2020-11-29T16:00Z	0.825	false
2020-11-29T15:45Z	0.825	false
2020-11-29T15:30Z	0.827	false
2020-11-29T15:15Z	0.827	false
2020-11-29T15:00Z	0.827	false
2020-11-29T14:45Z	0.827	false
2020-11-29T14:30Z	0.827	false
2020-11-29T14:15Z	0.827	false
2020-11-29T14:00Z	0.827	false
2020-11-29T13:45Z	0.827	false
2020-11-29T13:30Z	0.828	false
2020-11-29T13:15Z	0.828	false
2020-11-29T13:00Z	0.828	false
2020-11-29T12:45Z	0.829	false
2020-11-29T12:30Z	0.828	false
2020-11-29T12:15Z	0.829	false
2020-11-29T12:00Z	0.828	false
2020-11-29T11:45Z	0.829	false
2020-11-29T11:30Z	0.83	false
2020-11-29T11:15Z	0.829	false
2020-11-29T11:00Z	0.83	false
2020-11-29T10:45Z	0.83	false
2020-11-29T10:30Z	0.831	false
2020-11-29T10:15Z	0.832	false
2020-11-29T10:00Z	0.831	false
2020-11-29T09:45Z	0.832	false
2020-11-29T09:30Z	0.832	false
2020-11-29T09:15Z	0.832	false
2020-11-29T09:00Z	0.833	false
2020-11-29T08:45Z	0.832	false
2020-11-29T08:30Z	0.832	false
2020-11-29T08:15Z	0.832	false
2020-11-29T08:00Z	0.834	false
2020-11-29T07:45Z	0.834	false
2020-11-29T07:30Z	0.832	false
2020-11-29T07:15Z	0.832	false
2020-11-29T07:00Z	0.833	false
2020-11-29T06:45Z	0.834	false
2020-11-29T06:30Z	0.834	false
2020-11-29T06:15Z	0.834	false
2020-11-29T06:00Z	0.834	false
2020-11-29T05:45Z	0.834	false
2020-11-29T05:30Z	0.835	false
2020-11-29T05:15Z	0.835	false
2020-11-29T05:00Z	0.836	false
2020-11-29T04:45Z	0.835	false
2020-11-29T04:30Z	0.836	false
2020-11-29T04:15Z	0.836	false
2020-11-29T04:00Z	0.836	false
2020-11-29T03:45Z	0.837	false
2020-11-29T03:30Z	0.837	false
2020-11-29T03:15Z	0.837	false
2020-11-29T03:00Z	0.837	false
2020-11-29T02:45Z	0.838	false
2020-11-29T02:30Z	0.838	false
2020-11-29T02:15Z	0.838	false
2020-11-29T02:00Z	0.838	false
2020-11-29T01:45Z	0.839	false
2020-11-29T01:30Z	0.839	false
2020-11-29T01:15Z	0.84	false
2020-11-29T01:00Z	0.841	false
2020-11-29T00:45Z	0.841	false
2020-11-29T00:30Z	0.841	false
2020-11-29T00:15Z	0.841	false
2020-11-29T00:00Z	0.842	false
2020-11-28T23:45Z	0.843	false
2020-11-28T23:30Z	0.844	false
2020-11-28T23:15Z	0.844	false
2020-11-28T23:00Z	0.844	false
2020-11-28T22:45Z	0.844	false
2020-11-28T22:30Z	0.845	false
2020-11-28T22:15Z	0.846	false
2020-11-28T22:00Z	0.847	false
2020-11-28T21:45Z	0.848	false
2020-11-28T21:30Z	0.848	false
2020-11-28T21:15Z	0.85	false
2020-11-28T21:00Z	0.851	false
2020-11-28T20:45Z	0.852	false
2020-11-28T20:30Z	0.852	false
2020-11-28T20:15Z	0.853	false
2020-11-28T20:00Z	0.854	false
2020-11-28T19:45Z	0.854	false
2020-11-28T19:30Z	0.856	false
2020-11-28T19:15Z	0.854	false
2020-11-28T19:00Z	0.854	false
2020-11-28T18:45Z	0.854	false
2020-11-28T18:30Z	0.852	false
2020-11-28T18:15Z	0.851	false
2020-11-28T18:00Z	0.85	false
2020-11-28T17:45Z	0.848	false
2020-11-28T17:30Z	0.848	false
2020-11-28T17:15Z	0.847	false
2020-11-28T17:00Z	0.847	false
2020-11-28T16:45Z	0.848	false
2020-11-28T16:30Z	0.847	false
2020-11-28T16:15Z	0.848	false
2020-11-28T16:00Z	0.85	false
2020-11-28T15:45Z	0.85	false
2020-11-28T15:30Z	0.849	false
2020-11-28T15:15Z	0.85	false
2020-11-28T15:00Z	0.85	false
2020-11-28T14:45Z	0.85	false
2020-11-28T14:30Z	0.85	false
2020-11-28T14:15Z	0.851	false
2020-11-28T14:00Z	0.851	false
2020-11-28T13:45Z	0.851	false
2020-11-28T13:30Z	0.852	false
2020-11-28T13:15Z	0.852	false
2020-11-28T13:00Z	0.852	false
2020-11-28T12:45Z	0.853	false
2020-11-28T12:30Z	0.852	false
2020-11-28T12:15Z	0.852	false
2020-11-28T12:00Z	0.853	false
2020-11-28T11:45Z	0.852	false
2020-11-28T11:30Z	0.852	false
2020-11-28T11:15Z	0.852	false
2020-11-28T11:00Z	0.853	false
2020-11-28T10:45Z	0.854	false
2020-11-28T10:30Z	0.853	false
2020-11-28T10:15Z	0.854	false
2020-11-28T10:00Z	0.854	false
2020-11-28T09:45Z	0.854	false
2020-11-28T09:30Z	0.854	false
2020-11-28T09:15Z	0.854	false
2020-11-28T09:00Z	0.854	false
2020-11-28T08:45Z	0.854	false
2020-11-28T08:30Z	0.854	false
2020-11-28T08:15Z	0.854	false
2020-11-28T08:00Z	0.854	false
2020-11-28T07:45Z	0.853	false
2020-11-28T07:30Z	0.852	false
2020-11-28T07:15Z	0.851	false
2020-11-28T07:00Z	0.85	false
2020-11-28T06:45Z	0.85	false
2020-11-28T06:30Z	0.849	false
2020-11-28T06:15Z	0.848	false
2020-11-28T06:00Z	0.848	false
2020-11-28T05:45Z	0.846	false
2020-11-28T05:30Z	0.846	false
2020-11-28T05:15Z	0.847	false
2020-11-28T05:00Z	0.846	false
2020-11-28T04:45Z	0.845	false
2020-11-28T04:30Z	0.846	false
2020-11-28T04:15Z	0.845	false
2020-11-28T04:00Z	0.848	false
2020-11-28T03:45Z	0.848	false
2020-11-28T03:30Z	0.85	false
2020-11-28T03:15Z	0.849	false
2020-11-28T03:00Z	0.845	false
2020-11-28T02:45Z	0.844	false
2020-11-28T02:30Z	0.844	false
2020-11-28T02:15Z	0.844	false
2020-11-28T02:00Z	0.844	false
2020-11-28T01:45Z	0.844	false
2020-11-28T01:30Z	0.845	false
2020-11-28T01:15Z	0.845	false
2020-11-28T01:00Z	0.845	false
2020-11-28T00:45Z	0.845	false
2020-11-28T00:30Z	0.846	false
2020-11-28T00:15Z	0.846	false
2020-11-28T00:00Z	0.846	false
2020-11-27T23:45Z	0.846	false
2020-11-27T23:30Z	0.846	false
2020-11-27T23:15Z	0.847	false
2020-11-27T23:00Z	0.848	false
2020-11-27T22:45Z	0.847	false
2020-11-27T22:30Z	0.848	false
2020-11-27T22:15Z	0.848	false
2020-11-27T22:00Z	0.848	false
2020-11-27T21:45Z	0.848	false
2020-11-27T21:30Z	0.848	false
2020-11-27T21:15Z	0.849	false
2020-11-27T21:00Z	0.85	false
2020-11-27T20:45Z	0.85	false
2020-11-27T20:30Z	0.85	false
2020-11-27T20:15Z	0.85	false
2020-11-27T20:00Z	0.85	false
2020-11-27T19:45Z	0.85	false
2020-11-27T19:30Z	0.851	false
2020-11-27T19:15Z	0.852	false
2020-11-27T19:00Z	0.851	false
2020-11-27T18:45Z	0.853	false
2020-11-27T18:30Z	0.852	false
2020-11-27T18:15Z	0.852	false
2020-11-27T18:00Z	0.852	false
2020-11-27T17:45Z	0.853	false
2020-11-27T17:30Z	0.852	false
2020-11-27T17:15Z	0.854	false
2020-11-27T17:00Z	0.854	false
2020-11-27T16:45Z	0.854	false
2020-11-27T16:30Z	0.854	false
2020-11-27T16:15Z	0.854	false
2020-11-27T16:00Z	0.856	false
2020-11-27T15:45Z	0.855	false
2020-11-27T15:30Z	0.855	false
2020-11-27T15:15Z	0.856	false
2020-11-27T15:00Z	0.857	false
2020-11-27T14:45Z	0.856	false
2020-11-27T14:30Z	0.857	false
2020-11-27T14:15Z	0.857	false
2020-11-27T14:00Z	0.856	false
2020-11-27T13:45Z	0.857	false
2020-11-27T13:30Z	0.857	false
2020-11-27T13:15Z	0.857	false
2020-11-27T13:00Z	0.858	false
2020-11-27T12:45Z	0.858	false
2020-11-27T12:30Z	0.857	false
2020-11-27T12:15Z	0.858	false
2020-11-27T12:00Z	0.858	false
2020-11-27T11:45Z	0.86	false
2020-11-27T11:30Z	0.859	false
2020-11-27T11:15Z	0.859	false
2020-11-27T11:00Z	0.86	false
2020-11-27T10:45Z	0.861	false
2020-11-27T10:30Z	0.861	false
2020-11-27T10:15Z	0.861	false
2020-11-27T10:00Z	0.861	false
2020-11-27T09:45Z	0.862	false
2020-11-27T09:30Z	0.862	false
2020-11-27T09:15Z	0.861	false
2020-11-27T09:00Z	0.863	false
2020-11-27T08:45Z	0.865	false
2020-11-27T08:30Z	0.864	false
2020-11-27T08:15Z	0.865	false
2020-11-27T08:00Z	0.864	false
2020-11-27T07:45Z	0.866	false
2020-11-27T07:30Z	0.866	false
2020-11-27T07:15Z	0.865	false
2020-11-27T07:00Z	0.866	false
2020-11-27T06:45Z	0.867	false
2020-11-27T06:30Z	0.867	false
2020-11-27T06:15Z	0.868	false
2020-11-27T06:00Z	0.868	false
2020-11-27T05:45Z	0.867	false
2020-11-27T05:30Z	0.868	false
2020-11-27T05:15Z	0.869	false
2020-11-27T05:00Z	0.869	false
2020-11-27T04:45Z	0.87	false
2020-11-27T04:30Z	0.87	false
2020-11-27T04:15Z	0.872	false
2020-11-27T04:00Z	0.871	false
2020-11-27T03:45Z	0.872	false
2020-11-27T03:30Z	0.873	false
2020-11-27T03:15Z	0.873	false
2020-11-27T03:00Z	0.873	false
2020-11-27T02:45Z	0.873	false
2020-11-27T02:30Z	0.873	false
2020-11-27T02:15Z	0.874	false
2020-11-27T02:00Z	0.873	false
2020-11-27T01:45Z	0.875	false
2020-11-27T01:30Z	0.873	false
2020-11-27T01:15Z	0.875	false
2020-11-27T01:00Z	0.876	false
2020-11-27T00:45Z	0.876	false
2020-11-27T00:30Z	0.878	false
2020-11-27T00:15Z	0.879	false
2020-11-27T00:00Z	0.878	false
2020-11-26T23:45Z	0.879	false
2020-11-26T23:30Z	0.88	false
2020-11-26T23:15Z	0.881	false
2020-11-26T23:00Z	0.881	false
2020-11-26T22:45Z	0.882	false
2020-11-26T22:30Z	0.881	false
2020-11-26T22:15Z	0.882	false
2020-11-26T22:00Z	0.884	false
2020-11-26T21:45Z	0.883	false
2020-11-26T21:30Z	0.884	false
2020-11-26T21:15Z	0.885	false
2020-11-26T21:00Z	0.885	false
2020-11-26T20:45Z	0.887	false
2020-11-26T20:30Z	0.888	false
2020-11-26T20:15Z	0.888	false
2020-11-26T20:00Z	0.888	false
2020-11-26T19:45Z	0.889	false
2020-11-26T19:30Z	0.889	false
2020-11-26T19:15Z	0.89	false
2020-11-26T19:00Z	0.892	false
2020-11-26T18:45Z	0.893	false
2020-11-26T18:30Z	0.893	false
2020-11-26T18:15Z	0.894	false
2020-11-26T18:00Z	0.895	false
2020-11-26T17:45Z	0.895	false
2020-11-26T17:30Z	0.893	false
2020-11-26T17:15Z	0.894	false
2020-11-26T17:00Z	0.894	false
2020-11-26T16:45Z	0.895	false
2020-11-26T16:30Z	0.897	false
2020-11-26T16:15Z	0.897	false
2020-11-26T16:00Z	0.897	false
2020-11-26T15:45Z	0.898	false
2020-11-26T15:30Z	0.899	false
2020-11-26T15:15Z	0.9	false
2020-11-26T15:00Z	0.901	false
2020-11-26T14:45Z	0.9	false
2020-11-26T14:30Z	0.902	false
2020-11-26T14:15Z	0.902	false
2020-11-26T14:00Z	0.902	false
2020-11-26T13:45Z	0.904	false
2020-11-26T13:30Z	0.904	false
2020-11-26T13:15Z	0.905	false
2020-11-26T13:00Z	0.906	false
2020-11-26T12:45Z	0.907	false
2020-11-26T12:30Z	0.908	false
2020-11-26T12:15Z	0.909	false
2020-11-26T12:00Z	0.909	false
2020-11-26T11:45Z	0.911	false
2020-11-26T11:30Z	0.912	false
2020-11-26T11:15Z	0.913	false
2020-11-26T11:00Z	0.914	false
2020-11-26T10:45Z	0.914	false
2020-11-26T10:30Z	0.915	false
2020-11-26T10:15Z	0.915	false
2020-11-26T10:00Z	0.916	false
2020-11-26T09:45Z	0.918	false
2020-11-26T09:30Z	0.919	false
2020-11-26T09:15Z	0.922	false
2020-11-26T09:00Z	0.921	false
2020-11-26T08:45Z	0.924	false
2020-11-26T08:30Z	0.923	false
2020-11-26T08:15Z	0.925	false
2020-11-26T08:00Z	0.925	false
2020-11-26T07:45Z	0.927	false
2020-11-26T07:30Z	0.927	false
2020-11-26T07:15Z	0.93	false
2020-11-26T07:00Z	0.93	false
2020-11-26T06:45Z	0.932	false
2020-11-26T06:30Z	0.932	false
2020-11-26T06:15Z	0.935	false
2020-11-26T06:00Z	0.936	false
2020-11-26T05:45Z	0.938	false
2020-11-26T05:30Z	0.939	false
2020-11-26T05:15Z	0.939	false
2020-11-26T05:00Z	0.941	false
2020-11-26T04:45Z	0.944	false
2020-11-26T04:30Z	0.944	false
2020-11-26T04:15Z	0.945	false
2020-11-26T04:00Z	0.946	false
2020-11-26T03:45Z	0.949	false
2020-11-26T03:30Z	0.95	false
2020-11-26T03:15Z	0.951	false
2020-11-26T03:00Z	0.953	false
2020-11-26T02:45Z	0.955	false
2020-11-26T02:30Z	0.957	false
2020-11-26T02:15Z	0.959	false
2020-11-26T02:00Z	0.961	false
2020-11-26T01:45Z	0.961	false
2020-11-26T01:30Z	0.964	false
2020-11-26T01:15Z	0.965	false
2020-11-26T01:00Z	0.968	false
2020-11-26T00:45Z	0.97	false
2020-11-26T00:30Z	0.972	false
2020-11-26T00:15Z	0.974	false
2020-11-26T00:00Z	0.977	false
2020-11-25T23:45Z	0.979	false
2020-11-25T23:30Z	0.981	false
2020-11-25T23:15Z	0.983	false
2020-11-25T23:00Z	0.987	false
2020-11-25T22:45Z	0.988	false
2020-11-25T22:30Z	0.991	false
2020-11-25T22:15Z	0.994	false
2020-11-25T22:00Z	0.997	false
2020-11-25T21:45Z	1.001	false
2020-11-25T21:30Z	1.003	false
2020-11-25T21:15Z	1.006	false
2020-11-25T21:00Z	1.009	false
2020-11-25T20:45Z	1.013	false
2020-11-25T20:30Z	1.016	false
2020-11-25T20:15Z	1.02	false
2020-11-25T20:00Z	1.022	false
2020-11-25T19:45Z	1.027	false
2020-11-25T19:30Z	1.031	false
2020-11-25T19:15Z	1.036	false
2020-11-25T19:00Z	1.039	false
2020-11-25T18:45Z	1.043	false
2020-11-25T18:30Z	1.048	false
2020-11-25T18:15Z	1.054	false
2020-11-25T18:00Z	1.058	false
2020-11-25T17:45Z	1.063	false
2020-11-25T17:30Z	1.069	false
2020-11-25T17:15Z	1.075	false
2020-11-25T17:00Z	1.08	false
2020-11-25T16:45Z	1.085	false
2020-11-25T16:30Z	1.093	false
2020-11-25T16:15Z	1.1	false
2020-11-25T16:00Z	1.107	false
2020-11-25T15:45Z	1.115	false
2020-11-25T15:30Z	1.123	false
2020-11-25T15:15Z	1.13	false
2020-11-25T15:00Z	1.141	false
2020-11-25T14:45Z	1.15	false
2020-11-25T14:30Z	1.162	false
2020-11-25T14:15Z	1.174	false
2020-11-25T14:00Z	1.188	false
2020-11-25T13:45Z	1.203	false
2020-11-25T13:30Z	1.217	false
2020-11-25T13:15Z	1.236	false
2020-11-25T13:00Z	1.252	false
2020-11-25T12:45Z	1.27	false
2020-11-25T12:30Z	1.289	false
2020-11-25T12:15Z	1.309	false
2020-11-25T12:00Z	1.325	false
2020-11-25T11:45Z	1.339	false
2020-11-25T11:30Z	1.348	false
2020-11-25T11:15Z	1.353	false
2020-11-25T11:00Z	1.354	false
2020-11-25T10:45Z	1.352	false
2020-11-25T10:30Z	1.349	false
2020-11-25T10:15Z	1.338	false

Forecast data

Key information

• Station name: Holwell
• Station ID: 3005
• River name: Nunney Brook
• Typical range: 0.64m to 2.00m
• Highest level on record: 2.66m on 11 January 2008
• Site datum: 113.22mAOD (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
• Check the long term flood risk for an area in England.

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