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1.44

Roydon, Glen Faba

Stort
Stort catchment • Roydon • Essex • ID: 5190TH • Level
(21m ago) • 4 readings/hr • 138 views

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Current Level
1.442 mASD
▬ Steady
24h Max
1.450 mASD
24h Min
1.427 mASD
Typical Range
1.34 - 1.81
mASD
Highest Recorded
1.86 mASD
EA official record
A 3.04 reading (28 Feb 2025) sits in our unverified raw history and is not treated as the record
Current level is 78% of this
Current Flow
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🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +0.8 cm over 5h
10 Oct 13:15 ▬ steady 1.442 mASD
10 Oct 13:00 ▼ -0.5 cm 1.442 mASD
10 Oct 12:45 ▲ +0.5 cm 1.447 mASD
10 Oct 12:30 ▬ steady 1.442 mASD
10 Oct 12:15 ▼ -0.6 cm 1.442 mASD
10 Oct 12:00 ▲ +1 cm 1.448 mASD
10 Oct 11:45 ▼ -1 cm 1.438 mASD
10 Oct 11:30 ▲ +1 cm 1.450 mASD
10 Oct 11:15 ▬ steady 1.439 mASD
10 Oct 11:00 ▲ +0.2 cm 1.439 mASD
10 Oct 10:45 ▼ -0.2 cm 1.437 mASD
10 Oct 10:15 ▲ +0.4 cm 1.439 mASD
10 Oct 10:00 ▲ +0.4 cm 1.435 mASD
10 Oct 09:45 ▼ -0.2 cm 1.431 mASD
10 Oct 09:30 ▬ steady 1.433 mASD
10 Oct 09:15 ▬ steady 1.434 mASD
10 Oct 09:00 ▲ +0.1 cm 1.433 mASD
10 Oct 08:45 ▼ -0.1 cm 1.432 mASD
10 Oct 08:30 ▬ steady 1.433 mASD
10 Oct 08:00 1.434 mASD

Station Details

  • Monitoring Station: Roydon, Glen Faba
  • Watercourse: River Stort
  • Nearest Town: Roydon
  • County: Essex
  • Coordinates: 51°45'53"N 0°0'54"E (51.764828, 0.015113)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1984
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 5190TH
  • RLOI id: 7356 (the EA's check-for-flooding station id)
  • EA Gauge ID: 5190TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 2 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Stort
  • Typical Range: 1.337 – 1.810 mASD
  • Drainage Area: 280 km² upstream of this gauge
  • Flow Data: Daily mean flow (m³/s) to 8 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional) via EA Hydrology
  • EA Cross-check: 1.45 mASD (EA at 10 Oct 12:45)
  • Flow Archive: National River Flow Archive ↗

Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

Nearby Stations

Gauges connected to this river, and others nearby. A distance “by river” follows the river on the map; any other is in a straight line.

Connected upstream

Same river system, separate branch

Nearby

Distances by river: OS Open Rivers. Contains OS data © Crown copyright and database rights 2026.

💧 Storm overflows upstream of this gauge

Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.

6 storm overflows are traced upstream of this gauge, the nearest 17.6 km away along the river. 0 report discharging now, 6 report not discharging.

💧
Thames Water · into Little Hallingbury Brook · 17.6 km upstream along the river
26 spills · 209 hours in 2025
Not discharging now · last
💧
Thames Water · into Stort Navigation · 20.7 km upstream along the river
1 spill · 1 hours in 2025
Not discharging now · last
💧
Thames Water · into Great Hallingbury Brook · 23.7 km upstream along the river
0 spills · 0 hours in 2025
Not discharging now
💧
Thames Water · into The River Stort · 26.7 km upstream along the river
28 spills · 313 hours in 2025
Not discharging now · last
💧
Thames Water · into Pincey Brook · 28.3 km upstream along the river
40 spills · 425 hours in 2025
Not discharging now · last
💧
Thames Water · into Pincey Brook · 29.1 km upstream along the river
1 spill · 4 hours in 2025
Not discharging now · last

Nearby, connection not known

Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.

💧
Thames Water · into Toll House Stream · 1.2 km away in a straight line · no mapped watercourse close enough to be sure
5 spills · 38 hours in 2025
Not discharging now · last

These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →

Contains OS data © Crown copyright and database rights 2026.

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

This gauge rarely reaches its typical high of 1.81 m: 0 days since 2017. This year so far: 0 days.

2026 0 days so far
2025 0 days
2024 0 days
2023 0 days
2022 0 days
2021 0 days
2020 0 days
2019 0 days
2018 0 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out.

Flood history near this gauge

Official Environment Agency warnings issued since 2010 for the 7 flood areas linked to this gauge (nearest 3.3 km away).

6flood warnings 3flood alerts

Most recent flood warning: 14 Jan 2021 — River Stort at Harlow

Year by year
YearWarningsAlerts
2025 0 1
2021 1 1
2014 3 1
2012 1 0
2010 1 0

Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record. See also the Roydon flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 7 areas linked to this gauge, nearest first.

Catchment Character

🌊 Fairly flashy Responds fairly quickly to rain, with moderate baseflow between events.

Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.

The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).

Baseflow Index
0.49
mixed response
Avg Annual Rainfall
639 mm/yr
1991–2020 · +3% since 1941–70
Urban Extent
6.4%
partly urbanised
Highest Daily Mean Flow
36.90 m³/s
30 Oct 2000 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 1.425.000.7650.2405% (high)% of days exceeded95% (low)
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Land Cover (2023)
Woodland 7%Grassland 25%Arable 52%Urban 16%
Arable 62% → 52% since 1990

Flow affected by: groundwater abstraction, industrial / agricultural abstraction.

Photos

Gauging-station photographs from the National River Flow Archive (UKCEH).

Photos © NRFA / UKCEH & the measuring authority — shown at web resolution. Full gallery on the NRFA ↗

About this gauge

The ultrasonic gauging station is located in the lower River Stort, a tributary in the upper River Lee catchment. Flows summed with Rye Bridge to generate Feildes Weir flows.

More detail

The catchment

Chalk headwaters, London Clay dominates lower catchment (considerable Drift cover). Rural upper catchment, substantial urban development (including Harlow & Bishops Stortford) in the valley.

The station

Multipath ultrasonic (cross-path superseded single-path device). River maintained by Canal and River Trust.

How it measures flow

All but exceptional floods contained. Very low velocities (canalised river) hampered calibration and make low flow gauging difficult. Located immediately upstream of the confluence with the Lee at Feildes Weir with backing up when flows are high. Level measured by pressure transducer and radar in the stilling well.

Flow regime

Limited net impact of artificial influences but substantial gw abstraction in headwaters (a proportion is exported).

The flow record

Some early gauged daily flows estimated due to instrument malfunction. Flows affected by canal operation at high flows.

Descriptions from the National River Flow Archive (UKCEH). NRFA station record ↗

Gauge Details

How this gauging station is built and how long it has measured (NRFA / UKCEH).

Gauge type
Ultrasonic
Operating since
1976
Station datum
26.4 mAOD
Flow record
1985–2024 · 39 yrs · 100% complete
Hydrometric area
38
Measured by
Environment Agency

Frequently asked questions

Is the River Stort at Roydon, Glen Faba flooding today?

The current level is 1.44m, which is within the typical range of 1.34 to 1.81m. Flooding is unlikely at this level.

Is the river level rising or falling at Roydon, Glen Faba?

Based on the most recent readings, the level is currently steady. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.

What is a normal level for the River Stort at Roydon, Glen Faba?

The typical range at this station is 1.34m to 1.81m, based on Environment Agency historical data. Levels above 1.81m are higher than usually seen and may indicate a flood risk.

How often is this river level data updated?

Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.

Embed this gauge on your website

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📮 Flood risk by postcode near this gauge

Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →