River level Canons Brook at Harlow, Elizabeth way

Check for flood warnings in this area

Latest recorded level 0.29m at 4:30am Monday 17 February 2020.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 1.90m here, minor flooding is possible in this area
• Highest recorded level. Hide
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Observed data

DateTime	Value	Error
2020-02-17T04:30Z	0.292	false
2020-02-17T04:15Z	0.294	false
2020-02-17T04:00Z	0.299	false
2020-02-17T03:45Z	0.302	false
2020-02-17T03:30Z	0.303	false
2020-02-17T03:15Z	0.306	false
2020-02-17T03:00Z	0.31	false
2020-02-17T02:45Z	0.314	false
2020-02-17T02:30Z	0.317	false
2020-02-17T02:15Z	0.32	false
2020-02-17T02:00Z	0.325	false
2020-02-17T01:45Z	0.329	false
2020-02-17T01:30Z	0.333	false
2020-02-17T01:15Z	0.339	false
2020-02-17T01:00Z	0.345	false
2020-02-17T00:45Z	0.351	false
2020-02-17T00:30Z	0.356	false
2020-02-17T00:15Z	0.361	false
2020-02-17T00:00Z	0.365	false
2020-02-16T23:45Z	0.371	false
2020-02-16T23:30Z	0.375	false
2020-02-16T23:15Z	0.382	false
2020-02-16T23:00Z	0.391	false
2020-02-16T22:45Z	0.399	false
2020-02-16T22:30Z	0.404	false
2020-02-16T22:15Z	0.413	false
2020-02-16T22:00Z	0.421	false
2020-02-16T21:45Z	0.43	false
2020-02-16T21:30Z	0.44	false
2020-02-16T21:15Z	0.45	false
2020-02-16T21:00Z	0.46	false
2020-02-16T20:45Z	0.471	false
2020-02-16T20:30Z	0.482	false
2020-02-16T20:15Z	0.494	false
2020-02-16T20:00Z	0.506	false
2020-02-16T19:45Z	0.516	false
2020-02-16T19:30Z	0.53	false
2020-02-16T19:15Z	0.544	false
2020-02-16T19:00Z	0.563	false
2020-02-16T18:45Z	0.577	false
2020-02-16T18:30Z	0.596	false
2020-02-16T18:15Z	0.614	false
2020-02-16T18:00Z	0.632	false
2020-02-16T17:45Z	0.645	false
2020-02-16T17:30Z	0.659	false
2020-02-16T17:15Z	0.678	false
2020-02-16T17:00Z	0.692	false
2020-02-16T16:45Z	0.71	false
2020-02-16T16:30Z	0.732	false
2020-02-16T16:15Z	0.748	false
2020-02-16T16:00Z	0.759	false
2020-02-16T15:45Z	0.771	false
2020-02-16T15:30Z	0.789	false
2020-02-16T15:15Z	0.798	false
2020-02-16T15:00Z	0.796	false
2020-02-16T14:45Z	0.773	false
2020-02-16T14:30Z	0.758	false
2020-02-16T14:15Z	0.753	false
2020-02-16T14:00Z	0.738	false
2020-02-16T13:45Z	0.722	false
2020-02-16T13:30Z	0.712	false
2020-02-16T13:15Z	0.661	false
2020-02-16T13:00Z	0.64	false
2020-02-16T12:45Z	0.644	false
2020-02-16T12:30Z	0.636	false
2020-02-16T12:15Z	0.625	false
2020-02-16T12:00Z	0.615	false
2020-02-16T11:45Z	0.6	false
2020-02-16T11:30Z	0.58	false
2020-02-16T11:15Z	0.572	false
2020-02-16T11:00Z	0.564	false
2020-02-16T10:45Z	0.567	false
2020-02-16T10:30Z	0.578	false
2020-02-16T10:15Z	0.59	false
2020-02-16T10:00Z	0.601	false
2020-02-16T09:45Z	0.611	false
2020-02-16T09:30Z	0.617	false
2020-02-16T09:15Z	0.624	false
2020-02-16T09:00Z	0.642	false
2020-02-16T08:45Z	0.657	false
2020-02-16T08:30Z	0.63	false
2020-02-16T08:15Z	0.511	false
2020-02-16T08:00Z	0.435	false
2020-02-16T07:45Z	0.393	false
2020-02-16T07:30Z	0.367	false
2020-02-16T07:15Z	0.365	false
2020-02-16T07:00Z	0.362	false
2020-02-16T06:45Z	0.361	false
2020-02-16T06:30Z	0.357	false
2020-02-16T06:15Z	0.355	false
2020-02-16T06:00Z	0.341	false
2020-02-16T05:45Z	0.321	false
2020-02-16T05:30Z	0.302	false
2020-02-16T05:15Z	0.28	false
2020-02-16T05:00Z	0.252	false
2020-02-16T04:45Z	0.24	false
2020-02-16T04:30Z	0.229	false
2020-02-16T04:15Z	0.222	false
2020-02-16T04:00Z	0.22	false
2020-02-16T03:45Z	0.221	false
2020-02-16T03:30Z	0.222	false
2020-02-16T03:15Z	0.224	false
2020-02-16T03:00Z	0.225	false
2020-02-16T02:45Z	0.227	false
2020-02-16T02:30Z	0.228	false
2020-02-16T02:15Z	0.23	false
2020-02-16T02:00Z	0.233	false
2020-02-16T01:45Z	0.233	false
2020-02-16T01:30Z	0.236	false
2020-02-16T01:15Z	0.237	false
2020-02-16T01:00Z	0.238	false
2020-02-16T00:45Z	0.24	false
2020-02-16T00:30Z	0.242	false
2020-02-16T00:15Z	0.246	false
2020-02-16T00:00Z	0.248	false
2020-02-15T23:45Z	0.249	false
2020-02-15T23:30Z	0.252	false
2020-02-15T23:15Z	0.254	false
2020-02-15T23:00Z	0.256	false
2020-02-15T22:45Z	0.258	false
2020-02-15T22:30Z	0.262	false
2020-02-15T22:15Z	0.266	false
2020-02-15T22:00Z	0.268	false
2020-02-15T21:45Z	0.271	false
2020-02-15T21:30Z	0.276	false
2020-02-15T21:15Z	0.28	false
2020-02-15T21:00Z	0.287	false
2020-02-15T20:45Z	0.291	false
2020-02-15T20:30Z	0.29	false
2020-02-15T20:15Z	0.293	false
2020-02-15T20:00Z	0.293	false
2020-02-15T19:45Z	0.296	false
2020-02-15T19:30Z	0.296	false
2020-02-15T19:15Z	0.298	false
2020-02-15T19:00Z	0.3	false
2020-02-15T18:45Z	0.303	false
2020-02-15T18:30Z	0.311	false
2020-02-15T18:15Z	0.324	false
2020-02-15T18:00Z	0.337	false
2020-02-15T17:45Z	0.339	false
2020-02-15T17:30Z	0.336	false
2020-02-15T17:15Z	0.333	false
2020-02-15T17:00Z	0.331	false
2020-02-15T16:45Z	0.312	false
2020-02-15T16:30Z	0.298	false
2020-02-15T16:15Z	0.275	false
2020-02-15T16:00Z	0.24	false
2020-02-15T15:45Z	0.223	false
2020-02-15T15:30Z	0.219	false
2020-02-15T15:15Z	0.198	false
2020-02-15T15:00Z	0.188	false
2020-02-15T14:45Z	0.178	false
2020-02-15T14:30Z	0.168	false
2020-02-15T14:15Z	0.167	false
2020-02-15T14:00Z	0.167	false
2020-02-15T13:45Z	0.164	false
2020-02-15T13:30Z	0.162	false
2020-02-15T13:15Z	0.163	false
2020-02-15T13:00Z	0.163	false
2020-02-15T12:45Z	0.164	false
2020-02-15T12:30Z	0.166	false
2020-02-15T12:15Z	0.166	false
2020-02-15T12:00Z	0.166	false
2020-02-15T11:45Z	0.166	false
2020-02-15T11:30Z	0.167	false
2020-02-15T11:15Z	0.169	false
2020-02-15T11:00Z	0.169	false
2020-02-15T10:45Z	0.17	false
2020-02-15T10:30Z	0.171	false
2020-02-15T10:15Z	0.172	false
2020-02-15T10:00Z	0.174	false
2020-02-15T09:45Z	0.176	false
2020-02-15T09:30Z	0.178	false
2020-02-15T09:15Z	0.18	false
2020-02-15T09:00Z	0.18	false
2020-02-15T08:45Z	0.181	false
2020-02-15T08:30Z	0.181	false
2020-02-15T08:15Z	0.18	false
2020-02-15T08:00Z	0.181	false
2020-02-15T07:45Z	0.182	false
2020-02-15T07:30Z	0.181	false
2020-02-15T07:15Z	0.182	false
2020-02-15T07:00Z	0.181	false
2020-02-15T06:45Z	0.18	false
2020-02-15T06:30Z	0.18	false
2020-02-15T06:15Z	0.183	false
2020-02-15T06:00Z	0.185	false
2020-02-15T05:45Z	0.188	false
2020-02-15T05:30Z	0.191	false
2020-02-15T05:15Z	0.192	false
2020-02-15T05:00Z	0.19	false
2020-02-15T04:45Z	0.184	false
2020-02-15T04:30Z	0.177	false
2020-02-15T04:15Z	0.17	false
2020-02-15T04:00Z	0.166	false
2020-02-15T03:45Z	0.164	false
2020-02-15T03:30Z	0.165	false
2020-02-15T03:15Z	0.167	false
2020-02-15T03:00Z	0.168	false
2020-02-15T02:45Z	0.17	false
2020-02-15T02:30Z	0.172	false
2020-02-15T02:15Z	0.172	false
2020-02-15T02:00Z	0.17	false
2020-02-15T01:45Z	0.166	false
2020-02-15T01:30Z	0.162	false
2020-02-15T01:15Z	0.158	false
2020-02-15T01:00Z	0.155	false
2020-02-15T00:45Z	0.152	false
2020-02-15T00:30Z	0.15	false
2020-02-15T00:15Z	0.148	false
2020-02-15T00:00Z	0.148	false
2020-02-14T23:45Z	0.147	false
2020-02-14T23:30Z	0.147	false
2020-02-14T23:15Z	0.147	false
2020-02-14T23:00Z	0.147	false
2020-02-14T22:45Z	0.147	false
2020-02-14T22:30Z	0.148	false
2020-02-14T22:15Z	0.148	false
2020-02-14T22:00Z	0.148	false
2020-02-14T21:45Z	0.148	false
2020-02-14T21:30Z	0.149	false
2020-02-14T21:15Z	0.149	false
2020-02-14T21:00Z	0.149	false
2020-02-14T20:45Z	0.15	false
2020-02-14T20:30Z	0.15	false
2020-02-14T20:15Z	0.15	false
2020-02-14T20:00Z	0.152	false
2020-02-14T19:45Z	0.152	false
2020-02-14T19:30Z	0.152	false
2020-02-14T19:15Z	0.153	false
2020-02-14T19:00Z	0.154	false
2020-02-14T18:45Z	0.154	false
2020-02-14T18:30Z	0.154	false
2020-02-14T18:15Z	0.156	false
2020-02-14T18:00Z	0.156	false
2020-02-14T17:45Z	0.156	false
2020-02-14T17:30Z	0.158	false
2020-02-14T17:15Z	0.16	false
2020-02-14T17:00Z	0.162	false
2020-02-14T16:45Z	0.163	false
2020-02-14T16:30Z	0.163	false
2020-02-14T16:15Z	0.16	false
2020-02-14T16:00Z	0.158	false
2020-02-14T15:45Z	0.158	false
2020-02-14T15:30Z	0.158	false
2020-02-14T15:15Z	0.159	false
2020-02-14T15:00Z	0.159	false
2020-02-14T14:45Z	0.16	false
2020-02-14T14:30Z	0.16	false
2020-02-14T14:15Z	0.16	false
2020-02-14T14:00Z	0.16	false
2020-02-14T13:45Z	0.161	false
2020-02-14T13:30Z	0.161	false
2020-02-14T13:15Z	0.162	false
2020-02-14T13:00Z	0.162	false
2020-02-14T12:45Z	0.162	false
2020-02-14T12:30Z	0.163	false
2020-02-14T12:15Z	0.164	false
2020-02-14T12:00Z	0.164	false
2020-02-14T11:45Z	0.165	false
2020-02-14T11:30Z	0.165	false
2020-02-14T11:15Z	0.166	false
2020-02-14T11:00Z	0.167	false
2020-02-14T10:45Z	0.167	false
2020-02-14T10:30Z	0.168	false
2020-02-14T10:15Z	0.168	false
2020-02-14T10:00Z	0.169	false
2020-02-14T09:45Z	0.17	false
2020-02-14T09:30Z	0.17	false
2020-02-14T09:15Z	0.171	false
2020-02-14T09:00Z	0.172	false
2020-02-14T08:45Z	0.173	false
2020-02-14T08:30Z	0.173	false
2020-02-14T08:15Z	0.174	false
2020-02-14T08:00Z	0.176	false
2020-02-14T07:45Z	0.176	false
2020-02-14T07:30Z	0.178	false
2020-02-14T07:15Z	0.178	false
2020-02-14T07:00Z	0.178	false
2020-02-14T06:45Z	0.179	false
2020-02-14T06:30Z	0.179	false
2020-02-14T06:15Z	0.18	false
2020-02-14T06:00Z	0.181	false
2020-02-14T05:45Z	0.182	false
2020-02-14T05:30Z	0.183	false
2020-02-14T05:15Z	0.184	false
2020-02-14T05:00Z	0.184	false
2020-02-14T04:45Z	0.185	false
2020-02-14T04:30Z	0.187	false
2020-02-14T04:15Z	0.188	false
2020-02-14T04:00Z	0.189	false
2020-02-14T03:45Z	0.19	false
2020-02-14T03:30Z	0.191	false
2020-02-14T03:15Z	0.192	false
2020-02-14T03:00Z	0.193	false
2020-02-14T02:45Z	0.194	false
2020-02-14T02:30Z	0.196	false
2020-02-14T02:15Z	0.196	false
2020-02-14T02:00Z	0.198	false
2020-02-14T01:45Z	0.199	false
2020-02-14T01:30Z	0.2	false
2020-02-14T01:15Z	0.201	false
2020-02-14T01:00Z	0.203	false
2020-02-14T00:45Z	0.204	false
2020-02-14T00:30Z	0.205	false
2020-02-14T00:15Z	0.207	false
2020-02-14T00:00Z	0.208	false
2020-02-13T23:45Z	0.209	false
2020-02-13T23:30Z	0.211	false
2020-02-13T23:15Z	0.213	false
2020-02-13T23:00Z	0.214	false
2020-02-13T22:45Z	0.216	false
2020-02-13T22:30Z	0.217	false
2020-02-13T22:15Z	0.219	false
2020-02-13T22:00Z	0.22	false
2020-02-13T21:45Z	0.223	false
2020-02-13T21:30Z	0.224	false
2020-02-13T21:15Z	0.226	false
2020-02-13T21:00Z	0.228	false
2020-02-13T20:45Z	0.231	false
2020-02-13T20:30Z	0.233	false
2020-02-13T20:15Z	0.236	false
2020-02-13T20:00Z	0.238	false
2020-02-13T19:45Z	0.24	false
2020-02-13T19:30Z	0.244	false
2020-02-13T19:15Z	0.247	false
2020-02-13T19:00Z	0.248	false
2020-02-13T18:45Z	0.251	false
2020-02-13T18:30Z	0.254	false
2020-02-13T18:15Z	0.258	false
2020-02-13T18:00Z	0.26	false
2020-02-13T17:45Z	0.263	false
2020-02-13T17:30Z	0.264	false
2020-02-13T17:15Z	0.268	false
2020-02-13T17:00Z	0.27	false
2020-02-13T16:45Z	0.273	false
2020-02-13T16:30Z	0.276	false
2020-02-13T16:15Z	0.278	false
2020-02-13T16:00Z	0.281	false
2020-02-13T15:45Z	0.284	false
2020-02-13T15:30Z	0.289	false
2020-02-13T15:15Z	0.293	false
2020-02-13T15:00Z	0.298	false
2020-02-13T14:45Z	0.301	false
2020-02-13T14:30Z	0.306	false
2020-02-13T14:15Z	0.312	false
2020-02-13T14:00Z	0.317	false
2020-02-13T13:45Z	0.323	false
2020-02-13T13:30Z	0.328	false
2020-02-13T13:15Z	0.334	false
2020-02-13T13:00Z	0.34	false
2020-02-13T12:45Z	0.347	false
2020-02-13T12:30Z	0.355	false
2020-02-13T12:15Z	0.363	false
2020-02-13T12:00Z	0.371	false
2020-02-13T11:45Z	0.381	false
2020-02-13T11:30Z	0.39	false
2020-02-13T11:15Z	0.4	false
2020-02-13T11:00Z	0.412	false
2020-02-13T10:45Z	0.42	false
2020-02-13T10:30Z	0.427	false
2020-02-13T10:15Z	0.436	false
2020-02-13T10:00Z	0.445	false
2020-02-13T09:45Z	0.456	false
2020-02-13T09:30Z	0.465	false
2020-02-13T09:15Z	0.474	false
2020-02-13T09:00Z	0.486	false
2020-02-13T08:45Z	0.5	false
2020-02-13T08:30Z	0.514	false
2020-02-13T08:15Z	0.53	false
2020-02-13T08:00Z	0.543	false
2020-02-13T07:45Z	0.557	false
2020-02-13T07:30Z	0.576	false
2020-02-13T07:15Z	0.608	false
2020-02-13T07:00Z	0.652	false
2020-02-13T06:45Z	0.693	false
2020-02-13T06:30Z	0.694	false
2020-02-13T06:15Z	0.652	false
2020-02-13T06:00Z	0.547	false
2020-02-13T05:45Z	0.464	false
2020-02-13T05:30Z	0.377	false
2020-02-13T05:15Z	0.36	false
2020-02-13T05:00Z	0.36	false
2020-02-13T04:45Z	0.336	false
2020-02-13T04:30Z	0.311	false
2020-02-13T04:15Z	0.274	false
2020-02-13T04:00Z	0.249	false
2020-02-13T03:45Z	0.201	false
2020-02-13T03:30Z	0.192	false
2020-02-13T03:15Z	0.184	false
2020-02-13T03:00Z	0.18	false
2020-02-13T02:45Z	0.184	false
2020-02-13T02:30Z	0.184	false
2020-02-13T02:15Z	0.175	false
2020-02-13T02:00Z	0.157	false
2020-02-13T01:45Z	0.143	false
2020-02-13T01:30Z	0.144	false
2020-02-13T01:15Z	0.136	false
2020-02-13T01:00Z	0.127	false
2020-02-13T00:45Z	0.123	false
2020-02-13T00:30Z	0.121	false
2020-02-13T00:15Z	0.12	false
2020-02-13T00:00Z	0.118	false
2020-02-12T23:45Z	0.118	false
2020-02-12T23:30Z	0.118	false
2020-02-12T23:15Z	0.117	false
2020-02-12T23:00Z	0.117	false
2020-02-12T22:45Z	0.116	false
2020-02-12T22:30Z	0.116	false
2020-02-12T22:15Z	0.116	false
2020-02-12T22:00Z	0.116	false
2020-02-12T21:45Z	0.117	false
2020-02-12T21:30Z	0.116	false
2020-02-12T21:15Z	0.117	false
2020-02-12T21:00Z	0.117	false
2020-02-12T20:45Z	0.118	false
2020-02-12T20:30Z	0.118	false
2020-02-12T20:15Z	0.118	false
2020-02-12T20:00Z	0.118	false
2020-02-12T19:45Z	0.119	false
2020-02-12T19:30Z	0.12	false
2020-02-12T19:15Z	0.12	false
2020-02-12T19:00Z	0.12	false
2020-02-12T18:45Z	0.12	false
2020-02-12T18:30Z	0.121	false
2020-02-12T18:15Z	0.121	false
2020-02-12T18:00Z	0.121	false
2020-02-12T17:45Z	0.122	false
2020-02-12T17:30Z	0.122	false
2020-02-12T17:15Z	0.122	false
2020-02-12T17:00Z	0.122	false
2020-02-12T16:45Z	0.122	false
2020-02-12T16:30Z	0.122	false
2020-02-12T16:15Z	0.122	false
2020-02-12T16:00Z	0.123	false
2020-02-12T15:45Z	0.123	false
2020-02-12T15:30Z	0.123	false
2020-02-12T15:15Z	0.123	false
2020-02-12T15:00Z	0.124	false
2020-02-12T14:45Z	0.124	false
2020-02-12T14:30Z	0.124	false
2020-02-12T14:15Z	0.125	false
2020-02-12T14:00Z	0.126	false
2020-02-12T13:45Z	0.125	false
2020-02-12T13:30Z	0.125	false
2020-02-12T13:15Z	0.126	false
2020-02-12T13:00Z	0.127	false
2020-02-12T12:45Z	0.127	false
2020-02-12T12:30Z	0.128	false
2020-02-12T12:15Z	0.128	false
2020-02-12T12:00Z	0.128	false
2020-02-12T11:45Z	0.128	false
2020-02-12T11:30Z	0.128	false
2020-02-12T11:15Z	0.128	false
2020-02-12T11:00Z	0.129	false
2020-02-12T10:45Z	0.129	false
2020-02-12T10:30Z	0.13	false
2020-02-12T10:15Z	0.13	false
2020-02-12T10:00Z	0.131	false
2020-02-12T09:45Z	0.131	false
2020-02-12T09:30Z	0.132	false
2020-02-12T09:15Z	0.132	false
2020-02-12T09:00Z	0.132	false
2020-02-12T08:45Z	0.132	false
2020-02-12T08:30Z	0.133	false
2020-02-12T08:15Z	0.133	false
2020-02-12T08:00Z	0.134	false
2020-02-12T07:45Z	0.134	false
2020-02-12T07:30Z	0.135	false
2020-02-12T07:15Z	0.136	false
2020-02-12T07:00Z	0.136	false
2020-02-12T06:45Z	0.136	false
2020-02-12T06:30Z	0.136	false
2020-02-12T06:15Z	0.137	false
2020-02-12T06:00Z	0.137	false
2020-02-12T05:45Z	0.138	false
2020-02-12T05:30Z	0.138	false
2020-02-12T05:15Z	0.138	false
2020-02-12T05:00Z	0.139	false
2020-02-12T04:45Z	0.14	false

Forecast data

Key information

• Station name: Harlow, Elizabeth way
• Station ID: 7355
• River name: Canons Brook
• Typical range: 0.05m to 1.90m
• Highest level on record: 2.15m on 10 June 1993
• Site datum: 37.54mAOD (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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