Hampshire Avon at East Mills Weir
EA name: HAMPSHIRE AVON AT EAST MILLS WEIR
Environment Agency sampling point SW-RTN0043 · 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
- 6 Jan 2026, 08:4210 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 28 Oct 2026 and had nothing newer.
- Samples banked
- 10 since 25 Oct 2023 Imported periods: 1 Oct 2023 – 28 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 415862, 114339As published, to the nearest 1 m. Open in a map
- River, by its own name
- Hampshire Avon
- River, by the map
- River AvonPlaced on a river whose name partly matches its own, 23 m from the line.
- Next gauge downstream
- East Mills Flume On the River Avon · 0.1 km along the river
- Nearest gauge upstream
- Downton Iron Bridge On the River Avon · 12 km along the river
- Why it was sampled
- Monitoring (national agency policy) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.6%
Sampled 6 Jan 2026, 10 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jan 2026, 08:42 | 99.6 | 99.6% |
| 13 Oct 2025, 11:05 | 94.2 | 94.2% |
| 21 Jul 2025, 10:41 | 98.6 | 98.6% |
| 2 Apr 2025, 10:59 | 104.6 | 104.6% |
| 10 Jan 2025, 09:38 | 93.8 | 93.8% |
| 22 Oct 2024, 10:36 | 85.8 | 85.8% |
| 10 Jul 2024, 10:13 | 94.4 | 94.4% |
| 4 Apr 2024, 09:58 | 90.3 | 90.3% |
| 4 Jan 2024, 10:55 | 85.1 | 85.1% |
| 25 Oct 2023, 10:42 | 87.3 | 87.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
13.2 mg/l
Sampled 6 Jan 2026, 10 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jan 2026, 08:42 | 13.2 | 13.2 mg/l |
| 13 Oct 2025, 11:05 | 10.1 | 10.1 mg/l |
| 21 Jul 2025, 10:41 | 9.23 | 9.23 mg/l |
| 2 Apr 2025, 10:59 | 11.6 | 11.6 mg/l |
| 10 Jan 2025, 09:38 | 11.9 | 11.9 mg/l |
| 22 Oct 2024, 10:36 | 9.35 | 9.35 mg/l |
| 10 Jul 2024, 10:13 | 9.39 | 9.39 mg/l |
| 4 Apr 2024, 09:58 | 9.8 | 9.8 mg/l |
| 4 Jan 2024, 10:55 | 10.2 | 10.2 mg/l |
| 25 Oct 2023, 10:42 | 9.5 | 9.5 mg/l |
Water temperature
code 0076 · °C
3.4 °C
Sampled 6 Jan 2026, 10 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jan 2026, 08:42 | 3.4 | 3.4 °C |
| 13 Oct 2025, 11:05 | 12.3 | 12.3 °C |
| 21 Jul 2025, 10:41 | 18.4 | 18.4 °C |
| 2 Apr 2025, 10:59 | 10.8 | 10.8 °C |
| 10 Jan 2025, 09:38 | 5.1 | 5.1 °C |
| 22 Oct 2024, 10:36 | 11.4 | 11.4 °C |
| 10 Jul 2024, 10:13 | 15.5 | 15.5 °C |
| 4 Apr 2024, 09:58 | 11.6 | 11.6 °C |
| 4 Jan 2024, 10:55 | 7.5 | 7.5 °C |
| 25 Oct 2023, 10:42 | 11.5 | 11.5 °C |
pH
code 0061
8.22
Sampled 6 Jan 2026, 10 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jan 2026, 08:42 | 8.22 | 8.22 |
| 13 Oct 2025, 11:05 | 8.02 | 8.02 |
| 21 Jul 2025, 10:41 | 8.15 | 8.15 |
| 2 Apr 2025, 10:59 | 8.19 | 8.19 |
| 10 Jan 2025, 09:38 | 8.03 | 8.03 |
| 22 Oct 2024, 10:36 | 7.88 | 7.88 |
| 10 Jul 2024, 10:13 | 8.27 | 8.27 |
| 4 Apr 2024, 09:58 | 8.06 | 8.06 |
| 4 Jan 2024, 10:55 | 7.98 | 7.98 |
| 25 Oct 2023, 10:42 | 7.79 | 7.79 |
Conductivity
at 25 °C · code 0077 · µS/cm
586 µS/cm
Sampled 6 Jan 2026, 10 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jan 2026, 08:42 | 586 | 586 µS/cm |
| 13 Oct 2025, 11:05 | 578 | 578 µS/cm |
| 21 Jul 2025, 10:41 | 555 | 555 µS/cm |
| 2 Apr 2025, 10:59 | 563 | 563 µS/cm |
| 10 Jan 2025, 09:38 | 569 | 569 µS/cm |
| 22 Oct 2024, 10:36 | 528 | 528 µS/cm |
| 10 Jul 2024, 10:13 | 579 | 579 µS/cm |
| 4 Apr 2024, 09:58 | 516 | 516 µS/cm |
| 4 Jan 2024, 10:55 | 502 | 502 µS/cm |
| 25 Oct 2023, 10:42 | 491 | 491 µS/cm |
Everything measured here
5 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 5 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Oct 2023 – Jan 2026 | 99.6% 6 Jan 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Oct 2023 – Jan 2026 | 13.2 mg/l 6 Jan 2026 |
| Temperature of Water 0076 | River water | 10 | Oct 2023 – Jan 2026 | 3.4 °C 6 Jan 2026 |
| pH 0061 | River water | 10 | Oct 2023 – Jan 2026 | 8.22 6 Jan 2026 |
| Conductivity at 25 C 0077 | River water | 10 | Oct 2023 – Jan 2026 | 586 µS/cm 6 Jan 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.