River Allen downstream of All Hallows
EA name: RIVER ALLEN D/S ALL HALLOWS (also listed as “RIVER ALLEN AT R/B D/S ALL HALLOWS”)
Environment Agency sampling point SW-50350275 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)
These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.
Where and when
- Last sampled
- 10 Jul 2026, 11:143 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 12 since 9 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 402788, 112423As published, to the nearest 1 m. Open in a map
- River, by its own name
- Allen
- River, by the map
- River AllenPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Loverley Farm On the River Allen · 5.7 km along the river (the path rests on a repair to the map)
- Why it was sampled
- Monitoring (national agency policy) (10 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
pH
code 0061
7.64
Sampled 10 Jul 2026, 3 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:14 | 7.64 | 7.64 |
| 17 Apr 2026, 15:04 | 7.86 | 7.86 |
| 6 Jan 2026, 11:32 | 7.68 | 7.68 |
| 17 Oct 2025, 10:35 | 7.99 | 7.99 |
| 16 Jul 2025, 09:31 | 8.31 | 8.31 |
| 2 Apr 2025, 11:48 | 7.67 | 7.67 |
| 14 Jan 2025, 11:04 | 7.66 | 7.66 |
| 8 Oct 2024, 09:49 | 7.45 | 7.45 |
| 5 Jul 2024, 10:33 | 7.52 | 7.52 |
| 11 Apr 2024, 10:07 | 7.62 | 7.62 |
| 4 Jan 2024, 14:24 | 7.63 | 7.63 |
| 9 Oct 2023, 13:48 | 7.6 | 7.6 |
Everything measured here
7 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.
Show all 7 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| pH 0061 | River water | 12 | Oct 2023 – Jul 2026 | 7.64 10 Jul 2026 |
| Calcium 0241 | River water | 12 | Oct 2023 – Jul 2026 | 100 mg/l 10 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 12 | Oct 2023 – Jul 2026 | 1.1 mg/l 10 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 12 | Oct 2023 – Jul 2026 | 259 mg/l 10 Jul 2026 |
| Magnesium 0237 | River water | 12 | Oct 2023 – Jul 2026 | 2.2 mg/l 10 Jul 2026 |
| Zinc 6455 | River water | 12 | Oct 2023 – Jul 2026 | 19 µg/l 10 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 12 | Oct 2023 – Jul 2026 | 2.2 µg/l 10 Jul 2026 |
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.