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Live levels from 2 monitoring stations across Central Bedfordshire, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Biggleswade | 0.15 mASD 36m ago | Normal | ||
| 8.9 km by river | ||||
| Blunham | 0.20 mASD 36m ago | Normal | ||
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 Ivel above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Joins the Ivel above Biggleswade, its highest gauge, no more than 8.4 km by river above Biggleswade.
| Arleseyplace estimated | 0.09 mASD 51m ago | Low |
| ARLESEY GSplace estimated | 0.37 m3/s 51m ago | — |
Its water passes every gauge on the Ivel, from Biggleswade down.
Below Blunham, its water next reaches Eaton Socon, a gauge on River Great Ouse, 10.2 km by river downstream.
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.
19 storm overflows are traced upstream of Blunham, the Ivel’s lowest gauge on the river map: on the Ivel itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Blunham: 80 spills over 385 hours in total, across all 19.
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 Ivel includes the smaller streams that join it there.
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.
24 sampling points on the River Ivel and the streams that join it above Blunham, and below it. 16 have a sample from the last 12 months; 16 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) |
|---|---|---|---|---|
| Ash Brook A602 Road Bridge Ashbrook | Ash Brook | 13 km | 3 Jul 2026 · 3 months ago | |
| River Hiz Road Bridge Biggin Lane Hitchin | River Hiz | 11 km | 3 Sep 2026 · 35 days ago | Oxygen 87.7%Temp 15.9 °CpH 7.92Ammonia 0.067 mg/l |
| River Purwell A505 Road Bridge Hitchin | River Purwell | 11 km | 3 Sep 2026 · 35 days ago | Oxygen 82%Temp 14.6 °CpH 7.52Ammonia below 0.03 mg/l |
| River Hiz upstream of Hitchin sewage treatment works | River Hiz | 8.7 km | Last sampled 26 Feb 2020, before the imported period | |
| River Hiz Cadwell Arch | River Hiz | 7.2 km | Last sampled 13 Jan 2020, before the imported period | |
| Stondon Brook A600 Road Bridge Holwellbury | unnamed stream | 4.9 km | 4 Sep 2026 · 34 days ago | Oxygen 28.4%Temp 17.6 °CpH 8.21 Mar 2026Ammonia 0.062 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Pix Brook Cowslip Hill Letchworth | Pix Brook | 15 km | Last sampled 5 Jul 2010, before the imported period | |
| Six Foot Stream Cowslip Hill Letchworth | Pix Brook | 15 km | Last sampled 5 Jul 2010, before the imported period | |
| Cat Ditch downstream of Bygrave sewage treatment works | Cat Ditch | 15 km | 21 Sep 2026 · 17 days ago | Oxygen 61.9% Apr 2026Temp 10.6 °C Apr 2026pH 7.23 Apr 2026Ammonia 0.04 mg/l Apr 2026 |
| Pix Brook Outlet Reservoir upstream of Letchworth | Pix Brook | 15 km | 10 Jul 2026 · 3 months ago | Oxygen 48.6%Temp 21.2 °CpH 7.77Ammonia 0.4 mg/l |
| River Ivel A507 Road Bridge Stotfold | River Ivel | 13 km | 21 Sep 2026 · 17 days ago | Oxygen 83.1%Temp 10.9 °CpH 7.54Ammonia below 0.03 mg/l |
| Pix Brook Footbridge downstream of Letchworth sewage treatment works | Pix Brook | 13 km | 6 Jan 2026 · 9 months ago | |
| Pix Brook Church End Arlesey | Pix Brook | 8.7 km | 4 Sep 2026 · 34 days ago | Oxygen 89.6%Temp 18.5 °CpH 7.96Ammonia 0.033 mg/l |
| River Hiz A507 Road Bridge Arlsey | River Hiz | 8.5 km | 21 Sep 2026 · 17 days ago | Oxygen 87.6%Temp 14.1 °CpH 7.92Ammonia below 0.03 mg/l |
| River Ivel the Ford Poppyhill | River Ivel | 7.8 km | 14 Aug 2026 · 55 days ago | Oxygen 91%Temp 19.4 °CpH 7.97Ammonia below 0.03 mg/l |
| Henlow Brook tributary of Ivel Henlow Cross | unnamed stream | 7.6 km | Last sampled 3 Feb 2017, before the imported period | |
| River Ivel Poppy Hill Farm Road Bridge | River Ivel | 7.1 km | Last sampled 12 Jun 2006, before the imported period | |
| River Ivel A6001 Road Bridge Langford | River Ivel | 4.7 km | 10 Jul 2026 · 3 months ago | |
| Henlow Brook tributary of Ivel downstream of Langford Mill | River Ivel | 3.3 km | 1 Sep 2026 · 37 days ago | Oxygen 42.2% Jul 2026Temp 19.6 °C Jul 2026pH 7.83 Jul 2026Ammonia below 0.03 mg/l Jul 2026 |
| River Ivel Broom Mill | River Ivel | 1.7 km | Last sampled 1 May 2014, before the imported period |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Tributary of River Ivel downstream of Sandy Quarry Lower Caldecote | River Ivel | 6.0 km | Last sampled 17 Nov 2010, before the imported period | |
| River Ivel New Road Beeston | River Ivel | 4.3 km | 3 Sep 2026 · 35 days ago | Oxygen 74.2%Temp 17.8 °CpH 7.54Ammonia below 0.03 mg/l |
| Ickwell Brook tributary of Ivel Hatch Road Bridge | unnamed stream | 3.6 km | 3 Sep 2026 · 35 days ago | Oxygen 60.7%Temp 17.5 °CpH 7.52Ammonia below 0.03 mg/l |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Ivel Tempsford Depot Footbridge | River Ivel | 3.3 km | 3 Aug 2026 · 2 months ago | Oxygen 99.3% May 2026Temp 20.2 °CpH 8.14 May 2026Ammonia 0.05 mg/l May 2026 |
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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