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0.02

Little Hadham

Ash
Ash (Herts) catchment • Little Hadham • Hertfordshire • ID: 5039TH • Level
(25m ago) • 4 readings/hr • 173 views

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Current Level
0.023 mASD
▬ Steady
24h Max
0.025 mASD
24h Min
0.023 mASD
Typical Range
-0.10 - 0.82
mASD
Highest Recorded
1.97 mASD
EA official record
1.97 in our data (since Oct 1989)
Current level is 1% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Steady over 5h
08 Oct 13:30 ▬ steady 0.023 mASD
08 Oct 13:15 ▼ -0.1 cm 0.023 mASD
08 Oct 13:00 ▬ steady 0.024 mASD
08 Oct 12:45 ▲ +0.1 cm 0.024 mASD
08 Oct 12:30 ▼ -0.1 cm 0.023 mASD
08 Oct 12:15 ▬ steady 0.024 mASD
08 Oct 12:00 ▬ steady 0.024 mASD
08 Oct 11:45 ▬ steady 0.024 mASD
08 Oct 11:30 ▬ steady 0.024 mASD
08 Oct 11:15 ▬ steady 0.024 mASD
08 Oct 11:00 ▬ steady 0.024 mASD
08 Oct 10:45 ▬ steady 0.024 mASD
08 Oct 10:15 ▬ steady 0.024 mASD
08 Oct 10:00 ▬ steady 0.024 mASD
08 Oct 09:45 ▬ steady 0.024 mASD
08 Oct 09:30 ▬ steady 0.024 mASD
08 Oct 09:15 ▬ steady 0.024 mASD
08 Oct 09:00 ▬ steady 0.024 mASD
08 Oct 08:45 ▬ steady 0.024 mASD
08 Oct 08:30 0.024 mASD

Station Details

  • Monitoring Station: Little Hadham
  • Watercourse: River Ash
  • Nearest Town: Little Hadham
  • County: Hertfordshire
  • Coordinates: 51°53'3"N 0°5'29"E (51.884165, 0.091270)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1989
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 5039TH
  • RLOI id: 7346 (the EA's check-for-flooding station id)
  • EA Gauge ID: 5039TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 0 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Ash (Herts)
  • Typical Range: -0.097 – 0.820 mASD
  • EA Cross-check: 0.02 mASD (EA at 8 Oct 13:15)

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

Connected downstream

Same river system, separate branch

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

💧 Storm overflows upstream of this gauge

None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. 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. Those nearby are listed below.

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 Rib · 4.4 km away in a straight line · no mapped watercourse close enough to be sure
2 spills · 11 hours in 2025
Not discharging now · last
💧
Thames Water · into Stort Navigation · 6.0 km away in a straight line · not connected to this gauge on the river map
1 spill · 1 hours in 2025
Not discharging now · last

1 other overflow within 6 km is downstream of this gauge or on another branch of the river network, so it is not listed.

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 0.82 m: 1 day 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 1 day
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 2009 for the 10 flood areas linked to this gauge (nearest 2.7 km away).

10flood warnings 80flood alerts

Most recent flood warning: 14 Jan 2021 — River Stort at Clavering and Manuden

Year by year
YearWarningsAlerts
2026 0 4
2025 0 2
2024 0 15
2023 0 4
2021 1 7
2020 1 8
2019 0 2
2017 0 4
2016 0 5
2015 0 1
2014 5 9
2013 1 4
2012 0 7
2011 0 3
2010 0 1
2009 2 4

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 Little Hadham flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 10 areas linked to this gauge, nearest first.

Show 2 more

Frequently asked questions

Is the River Ash at Little Hadham flooding today?

The current level is 0.02m, which is within the typical range of -0.10 to 0.82m. Flooding is unlikely at this level.

Is the river level rising or falling at Little Hadham?

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 Ash at Little Hadham?

The typical range at this station is -0.10m to 0.82m, based on Environment Agency historical data. Levels above 0.82m 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.

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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 →