FloodRadar
Log inCreate free account

Explore FloodRadar

Explore the map
Weather
Why ?
Home › Rivers › Sandon Brook

Sandon Brook water levels

Live levels from 1 monitoring station across Essex, updated every 15 minutes.

1stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
Sandon BridgeSandon0.06 mASD 31m agoNormal—

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.

Gauged tributaries

Streams and rivers with a gauge whose water joins Sandon Brook 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 Sandon Brook above Sandon Bridge on the river map. Streams without a gauge are not counted here.

Where Sandon Brook goes

No gauge below Sandon Bridge 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.

Streams without a gauge

Named streams on the river map that flow into Sandon Brook and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.

  • Erme Drain (joins about 830 m above Sandon Bridge)

Storm overflows upstream

None of the storm overflows FloodRadar holds is traced upstream of Sandon Bridge on the river map. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow.

Near these gauges, connection not known

Within 3 km of one of Sandon Brook’s gauges in a straight line, but the river map cannot say whether their water reaches it.

  • Great Baddow - Bramston Close CSO Not discharging
    Anglian Water · into Baddow Brook · 2.8 km from Sandon Bridge in a straight line · no mapped watercourse close enough to be sure · 2025: 1 spill, 0.5 h

1 other overflow within 3 km of these gauges is placed below Sandon Brook’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.

Water samples

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.

7 sampling points on the Sandon Brook and the streams that join it above Sandon Bridge, and below it. 4 have a sample from the last 12 months; 5 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.

Above Sandon Bridge Sandon Brook 5 points, 3 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Sandon Brook Butts Green FordErme Drain2.5 km7 Sep 2026 · 31 days agoOxygen 53.4%Temp 15.6 °CpH 7.5Ammonia 0.045 mg/l
Sandon Brook upstream of confluence with East ArmSandon Brook0.9 km7 Sep 2026 · 31 days agoOxygen 77.9%Temp 16.2 °CpH 7.81Ammonia below 0.03 mg/l
Sandon Brook East Arm at confluenceSandon Brook0.8 kmLast sampled 24 Aug 2004, before the imported period
Sandon Brook upstream of A414 Road BridgeSandon Brook0.6 km1 Dec 2023 · 2.9 years agoOxygen 90.9%Temp 4.1 °CpH 7.92Ammonia 0.022 mg/l
Sandon Brook A414 BridgeSandon Brook0.1 kmLast sampled 13 Jun 2019, before the imported period
Below Sandon Bridge 2 points
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
Sandon Brook Long Ford Little BaddowSandon Brook2.2 km26 May 2026 · 4 months agoOxygen 73.5%Temp 17.7 °CpH 7.69Ammonia 0.054 mg/l
Sandon Brook Little BaddowSandon Brook3.5 km26 Jan 2026 · 8 months agoOxygen 93.8%Temp 5.8 °CpH 7.96Ammonia below 0.03 mg/l

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.

Wave tracker for this river → Essex rivers → All UK rivers