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Water Level Easing
Easing — down from 35.21 at 17:45, now 35.14
35.14

Provender Mill

Arun
Arun and Western Streams catchment • Horsham • West Sussex • ID: E9960 • Level
(33m ago) • 4 readings/hr • 170 views

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⤴ Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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Current Level
35.141 mAOD
▼ Easing
24h Max
35.210 mAOD
24h Min
35.067 mAOD
Typical Range
34.35 - 35.70
mAOD
Highest Recorded
37.40 mAOD
EA official record
37.40 in our data (since Jul 2007)
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +6 cm over 5h
09 Oct 22:30 ▼ -0.9 cm 35.141 mAOD
09 Oct 22:15 ▲ +1 cm 35.150 mAOD
09 Oct 22:00 ▬ steady 35.139 mAOD
09 Oct 21:45 ▼ -2 cm 35.140 mAOD
09 Oct 21:30 ▼ -0.8 cm 35.155 mAOD
09 Oct 21:15 ▼ -0.2 cm 35.163 mAOD
09 Oct 21:00 ▼ -0.3 cm 35.165 mAOD
09 Oct 20:45 ▬ steady 35.168 mAOD
09 Oct 20:30 ▼ -2 cm 35.168 mAOD
09 Oct 20:15 ▼ -0.4 cm 35.184 mAOD
09 Oct 20:00 ▼ -1 cm 35.188 mAOD
09 Oct 19:45 ▼ -0.6 cm 35.201 mAOD
09 Oct 19:30 ▬ steady 35.207 mAOD
09 Oct 19:15 ▼ -0.2 cm 35.206 mAOD
09 Oct 19:00 ▼ -0.2 cm 35.208 mAOD
09 Oct 18:45 ▲ +1 cm 35.210 mAOD
09 Oct 18:30 ▲ +3 cm 35.196 mAOD
09 Oct 18:15 ▲▲ +6 cm 35.168 mAOD
09 Oct 18:00 ▲ +3 cm 35.106 mAOD
09 Oct 17:30 35.076 mAOD

Station Details

  • Monitoring Station: Provender Mill
  • Watercourse: River Arun
  • Nearest Town: Horsham
  • County: West Sussex
  • Nearest reservoir: Ardingly (16.4 km) · 20.2% full (as of 4 Oct 2026)
  • Coordinates: 51°3'37"N 0°20'1"W (51.060158, -0.333561)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Oct 2006
  • Status: Active
  • Station Type: River level station (multi-sensor)
Technical details: references, datum, range, flow archive
  • Station Reference: E9960
  • RLOI id: 9243 (the EA's check-for-flooding station id)
  • EA Gauge ID: E9960-level-stage-i-15_min-mAOD
  • Parameter: Level
  • Unit: mAOD
  • Typical rise rate: 5 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Arun and Western Streams
  • Typical Range: 34.350 – 35.700 mAOD
  • EA Cross-check: 35.15 mAOD (EA at 9 Oct 22:15)

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 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

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.

2 storm overflows are traced upstream of this gauge, the nearest 2.4 km away along the river. 0 report discharging now, 2 report not discharging.

💧
Southern Water · into Horn Brook · 2.4 km upstream along the river
7 spills · 49 hours in 2025
Not discharging now · last
💧
Southern Water · into River Arun · 4.3 km upstream along the river
76 spills · 1,252 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.

💧
Southern Water · into Freshwater River · 3.1 km away in a straight line · no mapped watercourse close enough to be sure
12 spills · 25 hours in 2025
Not discharging now · last
💧
Southern Water · into Tributary Of Nuthurst Stream · 4.2 km away in a straight line · no mapped watercourse close enough to be sure
77 spills · 1,104 hours in 2025
Not discharging now · last
💧
Southern Water · into Parsons Brook · 5.9 km away in a straight line · its recorded watercourse is not the one mapped beside it
47 spills · 417 hours in 2025
Not discharging now · last

3 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are 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 35.70 m: 12 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 8 days patchy data
2017 4 days patchy data

Counted from each day's highest reading. Days with missing or implausible readings are left out, so a year marked patchy may have run high more often than shown.

Flood history near this gauge

Official Environment Agency warnings issued since 2012 for the 7 flood areas linked to this gauge (nearest 0.6 km away).

12flood warnings 88flood alerts

Most recent flood warning: 18 Dec 2025 — Broadbridge Heath to Pallingham Quay on the River Arun

Year by year
YearWarningsAlerts
2026 0 10
2025 1 9
2024 2 14
2023 1 8
2022 0 6
2021 0 5
2020 2 14
2019 4 5
2018 0 1
2016 0 4
2015 1 2
2014 0 5
2013 1 1
2012 0 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 Horsham 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.

Frequently asked questions

Is the River Arun at Provender Mill flooding today?

The current level is 35.14m, which is within the typical range of 34.35 to 35.70m. Flooding is unlikely at this level.

Is the river level rising or falling at Provender Mill?

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

Why is the level slowly falling?

When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.

What is a normal level for the River Arun at Provender Mill?

The typical range at this station is 34.35m to 35.70m, based on Environment Agency historical data. Levels above 35.70m 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 →