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Live levels from 3 monitoring stations across Essex, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Churchend | 0.11 mASD 42m ago | Normal | ||
| 8.6 km by river | ||||
| Felsted | 0.14 mASD 42m ago | Normal | ||
| 18.5 km by river | ||||
| Springfield | 0.12 mASD 42m ago | Normal | ||
Also on the Chelmer by the river map, but filed under another river name: CHURCH END FGS GREAT DUNMOW DUAL COMMS.
Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.
Contains OS data © Crown copyright and database rights 2026.
Streams and rivers with a gauge whose water joins the Chelmer above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
No gauged tributary joins the Chelmer above Springfield on the river map. Streams without a gauge are not counted here.
No gauge below Springfield is known on the river map.
Tributaries and where they join are traced on the river map (OS Open Rivers, edition 2026-04) and the Environment Agency’s links between its gauges. The map holds distances between gauges, not the junctions themselves, so a junction is placed between two gauges, and no further up than the tributary’s own lowest gauge. Contains OS data © Crown copyright and database rights 2026.
7 storm overflows are traced upstream of Springfield, the Chelmer’s lowest gauge on the river map: on the Chelmer itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Springfield: 71 spills over 427 hours in total, across all 7.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Chelmer includes the smaller streams that join it there.
Within 3 km of one of the Chelmer’s gauges in a straight line, but the river map cannot say whether their water reaches it.
1 other overflow within 3 km of these gauges is placed below the Chelmer’s lowest gauge or on another river, so not listed.
A status is the water company’s own monitor: it says whether an overflow is discharging, never how much or why, and a spill does not by itself explain a change in a river level. A status older than two hours is shown as unknown. Annual figures are the official returns: 12/24-hour spills for England and Wales, overflow events for Scotland (Scottish Water counts differently, so the two cannot be compared). “No data” means the monitor produced no usable data that year, not zero. Overflows are placed on OS Open Rivers (edition 2026-04), which leaves out many small channels: an overflow the map cannot place may still drain here. Contains OS data © Crown copyright and database rights 2026. Sewage in Britain’s rivers →
Live status: © Anglian Water storm overflow activity data, licensed under CC BY 4.0. Annual figures for England: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence v3.0.
Dated samples taken by the Environment Agency, not live readings. Results are published days to months after the sample is taken, and many points are sampled only a few times a year, or have not been sampled for years.
18 sampling points on the River Chelmer and the streams that join it above Springfield, and below it. 5 have a sample from the last 12 months; 6 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Chelmer Armitage Bridge | River Chelmer | 12 km | 1 Oct 2026 · 7 days ago | Oxygen 64.9% Jun 2026Temp 14.2 °C Jun 2026pH 7.61 Jun 2026Ammonia 0.11 mg/l Jun 2026 |
| Tilty Brook Tilty Mill Bypass | Tilty Brook | 6.2 km | Last sampled 3 Dec 2012, before the imported period | |
| River Chelmer Duton Hill Bridge | River Chelmer | 6.0 km | Last sampled 23 Jul 2019, before the imported period | |
| River Chelmer Great Easton Ford | River Chelmer | 3.9 km | Last sampled 19 Nov 2004, before the imported period |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Chelmer Churchend Flume | River Chelmer | 0.1 km | Last sampled 18 Nov 2010, before the imported period |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Chelmer Churchend Bridge | River Chelmer | 8.1 km | Last sampled 20 Dec 2013, before the imported period | |
| River Chelmer Langleys Bridge | River Chelmer | 5.4 km | 7 Sep 2026 · 31 days ago | Oxygen 51%Temp 18.2 °CpH 7.61Ammonia 0.05 mg/l |
| Stebbing Brook Priory Bridge | Stebbing Brook | 1.9 km | 7 Sep 2026 · 31 days ago | Oxygen 78.1%Temp 16.9 °CpH 7.95Ammonia below 0.03 mg/l |
| Stebbing Brook confluence Footbridge | Stebbing Brook | 1.5 km | Last sampled 10 Aug 2021, before the imported period | |
| River Chelmer Felsted Mill | River Chelmer | 0.4 km | 29 Jan 2025 · 20 months ago | Oxygen 94.4%Temp 6.5 °CpH 8.23Ammonia 0.04 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Chelmer Hartford End Road Bridge | River Chelmer | 15 km | Last sampled 20 Dec 2013, before the imported period | |
| Walthambury Brook Great Waltham | Walthambury Brook | 9.9 km | Last sampled 8 Feb 2017, before the imported period | |
| River Chelmer Little Waltham Bridge | River Chelmer | 8.0 km | Last sampled 23 Jul 2019, before the imported period |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Chelmer Sandford Mill | River Chelmer | 4.0 km | Last sampled 12 May 2017, before the imported period | |
| River Chelmer Little Baddow Mill | River Chelmer | 8.4 km | 26 Mar 2026 · 6 months ago | Oxygen 113.6%Temp 9.7 °CpH 8.45Ammonia below 0.03 mg/l |
| River Chelmer Rushes Lock | River Chelmer | 13 km | 17 Sep 2026 · 21 days ago | Oxygen 70.6%Temp 17.3 °CpH 7.7Ammonia 0.063 mg/l |
| River Chelmer Sugar Mills WQMS | River Chelmer | 15 km | Last sampled 12 May 2000, before the imported period | |
| River Chelmer downstream of Langford water treatment works | River Chelmer | 18 km | Last sampled 19 Aug 2014, before the imported period |
Distances are along the river to the gauge named. England's samples only.
FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.
Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.
Contains OS data © Crown copyright and database rights 2026.
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