Eastern Avon at Swan Bridge Pewsey
EA name: EASTERN AVON AT SWAN BRIDGE PEWSEY
Environment Agency sampling point SW-50211468 · 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
- 5 May 2026, 12:055 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 22 since 20 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 416286, 159628As published, to the nearest 1 m. Open in a map
- River, by its own name
- Eastern Avon
- River, by the map
- River AvonPlaced on a river whose name partly matches its own, 7 m from the line.
- Next gauge downstream
- Upavon East On the River Avon · 7.4 km along the riverUpavon West On the River Avon · 7.4 km along the river
- Nearest gauge upstream
- Pewsey On the River Avon · 0.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.6%
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 95.6 | 95.6% |
| 9 Apr 2026, 12:15 | 100.1 | 100.1% |
| 24 Mar 2026, 13:04 | 96.3 | 96.3% |
| 23 Feb 2026, 14:06 | 95 | 95% |
| 20 Jan 2026, 11:22 | 99.7 | 99.7% |
| 6 Aug 2025, 15:35 | 93.8 | 93.8% |
| 7 Feb 2025, 13:27 | 94.2 | 94.2% |
| 24 Jan 2025, 12:04 | 95 | 95% |
| 4 Dec 2024, 13:39 | 92.7 | 92.7% |
| 20 Nov 2024, 12:11 | 94.1 | 94.1% |
| 16 Oct 2024, 13:27 | 91.1 | 91.1% |
| 27 Sep 2024, 12:38 | 91.6 | 91.6% |
| 19 Aug 2024, 10:51 | 94.6 | 94.6% |
| 29 Jul 2024, 11:40 | 97 | 97% |
| 24 Jun 2024, 13:30 | 95.2 | 95.2% |
| 30 May 2024, 13:45 | 95.4 | 95.4% |
| 17 Apr 2024, 11:44 | 96.8 | 96.8% |
| 27 Feb 2024, 11:34 | 89.6 | 89.6% |
| 15 Jan 2024, 12:46 | 92.5 | 92.5% |
| 7 Dec 2023, 10:13 | 91.5 | 91.5% |
| 21 Nov 2023, 11:50 | 91.2 | 91.2% |
| 20 Oct 2023, 11:08 | 82.4 | 82.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.96 mg/l
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 9.96 | 9.96 mg/l |
| 9 Apr 2026, 12:15 | 10.7 | 10.7 mg/l |
| 24 Mar 2026, 13:04 | 10.6 | 10.6 mg/l |
| 23 Feb 2026, 14:06 | 10.7 | 10.7 mg/l |
| 20 Jan 2026, 11:22 | 11.6 | 11.6 mg/l |
| 6 Aug 2025, 15:35 | 9.75 | 9.75 mg/l |
| 7 Feb 2025, 13:27 | 11.4 | 11.4 mg/l |
| 24 Jan 2025, 12:04 | 11.2 | 11.2 mg/l |
| 4 Dec 2024, 13:39 | 10.6 | 10.6 mg/l |
| 20 Nov 2024, 12:11 | 11.2 | 11.2 mg/l |
| 16 Oct 2024, 13:27 | 9.6 | 9.6 mg/l |
| 27 Sep 2024, 12:38 | 9.92 | 9.92 mg/l |
| 19 Aug 2024, 10:51 | 10.1 | 10.1 mg/l |
| 29 Jul 2024, 11:40 | 10.1 | 10.1 mg/l |
| 24 Jun 2024, 13:30 | 9.9 | 9.9 mg/l |
| 30 May 2024, 13:45 | 10.1 | 10.1 mg/l |
| 17 Apr 2024, 11:44 | 10.9 | 10.9 mg/l |
| 27 Feb 2024, 11:34 | 10.7 | 10.7 mg/l |
| 15 Jan 2024, 12:46 | 11.3 | 11.3 mg/l |
| 7 Dec 2023, 10:13 | 10.7 | 10.7 mg/l |
| 21 Nov 2023, 11:50 | 10.1 | 10.1 mg/l |
| 20 Oct 2023, 11:08 | 8.8 | 8.8 mg/l |
Water temperature
code 0076 · °C
13.4 °C
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 13.4 | 13.4 °C |
| 9 Apr 2026, 12:15 | 12.1 | 12.1 °C |
| 24 Mar 2026, 13:04 | 10.8 | 10.8 °C |
| 23 Feb 2026, 14:06 | 10.1 | 10.1 °C |
| 20 Jan 2026, 11:22 | 8.5 | 8.5 °C |
| 6 Aug 2025, 15:35 | 13.5 | 13.5 °C |
| 7 Feb 2025, 13:27 | 6.9 | 6.9 °C |
| 24 Jan 2025, 12:04 | 8 | 8 °C |
| 4 Dec 2024, 13:39 | 9.2 | 9.2 °C |
| 20 Nov 2024, 12:11 | 7.8 | 7.8 °C |
| 16 Oct 2024, 13:27 | 12.9 | 12.9 °C |
| 27 Sep 2024, 12:38 | 11.7 | 11.7 °C |
| 19 Aug 2024, 10:51 | 12.2 | 12.2 °C |
| 29 Jul 2024, 11:40 | 13.6 | 13.6 °C |
| 24 Jun 2024, 13:30 | 13.5 | 13.5 °C |
| 30 May 2024, 13:45 | 12.8 | 12.8 °C |
| 17 Apr 2024, 11:44 | 10.1 | 10.1 °C |
| 27 Feb 2024, 11:34 | 7.6 | 7.6 °C |
| 15 Jan 2024, 12:46 | 6.8 | 6.8 °C |
| 7 Dec 2023, 10:13 | 8.3 | 8.3 °C |
| 21 Nov 2023, 11:50 | 10.6 | 10.6 °C |
| 20 Oct 2023, 11:08 | 12.3 | 12.3 °C |
pH
code 0061
8.01
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 8.01 | 8.01 |
| 9 Apr 2026, 12:15 | 8.04 | 8.04 |
| 24 Mar 2026, 13:04 | 7.89 | 7.89 |
| 23 Feb 2026, 14:06 | 7.7 | 7.7 |
| 20 Jan 2026, 11:22 | 7.83 | 7.83 |
| 6 Aug 2025, 15:35 | 8.12 | 8.12 |
| 7 Feb 2025, 13:27 | 7.87 | 7.87 |
| 24 Jan 2025, 12:04 | 7.73 | 7.73 |
| 4 Dec 2024, 13:39 | 7.81 | 7.81 |
| 20 Nov 2024, 12:11 | 7.86 | 7.86 |
| 16 Oct 2024, 13:27 | 7.7 | 7.7 |
| 27 Sep 2024, 12:38 | 7.88 | 7.88 |
| 19 Aug 2024, 10:51 | 8 | 8 |
| 29 Jul 2024, 11:40 | 7.95 | 7.95 |
| 24 Jun 2024, 13:30 | 8.12 | 8.12 |
| 30 May 2024, 13:45 | 7.99 | 7.99 |
| 17 Apr 2024, 11:44 | 8.05 | 8.05 |
| 27 Feb 2024, 11:34 | 7.82 | 7.82 |
| 15 Jan 2024, 12:46 | 7.85 | 7.85 |
| 7 Dec 2023, 10:13 | 7.75 | 7.75 |
| 21 Nov 2023, 11:50 | 7.74 | 7.74 |
| 20 Oct 2023, 11:08 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2026, 12:15 | 0.034 | 0.034 mg/l |
| 24 Mar 2026, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Feb 2026, 14:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2026, 11:22 | 0.052 | 0.052 mg/l |
| 6 Aug 2025, 15:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Feb 2025, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jan 2025, 12:04 | 0.082 | 0.082 mg/l |
| 4 Dec 2024, 13:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2024, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2024, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Sep 2024, 12:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2024, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2024, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2024, 13:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Apr 2024, 11:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Feb 2024, 11:34 | 0.041 | 0.041 mg/l |
| 15 Jan 2024, 12:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Dec 2023, 10:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Nov 2023, 11:50 | 0.034 | 0.034 mg/l |
| 20 Oct 2023, 11:08 | 0.41 | 0.41 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.09 mg/l
Sampled 5 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 7.09 | 7.09 mg/l |
| 9 Apr 2026, 12:15 | 6.77 | 6.77 mg/l |
| 24 Mar 2026, 13:04 | 6.79 | 6.79 mg/l |
| 23 Feb 2026, 14:06 | 6.68 | 6.68 mg/l |
| 20 Jan 2026, 11:22 | 7.76 | 7.76 mg/l |
| 6 Aug 2025, 15:35 | 8.59 | 8.59 mg/l |
| 7 Feb 2025, 13:27 | 7.29 | 7.29 mg/l |
| 24 Jan 2025, 12:04 | 5.38 | 5.38 mg/l |
| 20 Nov 2024, 12:11 | 6.79 | 6.79 mg/l |
| 16 Oct 2024, 13:27 | 6.68 | 6.68 mg/l |
| 27 Sep 2024, 12:38 | 6.18 | 6.18 mg/l |
| 19 Aug 2024, 10:51 | 8.09 | 8.09 mg/l |
| 29 Jul 2024, 11:40 | 8.09 | 8.09 mg/l |
| 24 Jun 2024, 13:30 | 7.49 | 7.49 mg/l |
| 30 May 2024, 13:45 | 6.78 | 6.78 mg/l |
| 17 Apr 2024, 11:44 | 6.69 | 6.69 mg/l |
| 27 Feb 2024, 11:34 | 6.49 | 6.49 mg/l |
| 15 Jan 2024, 12:46 | 6.99 | 6.99 mg/l |
| 7 Dec 2023, 10:13 | 6.99 | 6.99 mg/l |
| 21 Nov 2023, 11:50 | 6.69 | 6.69 mg/l |
| 20 Oct 2023, 11:08 | 5.47 | 5.47 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.19 mg/l
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 0.19 | 0.19 mg/l |
| 9 Apr 2026, 12:15 | 0.17 | 0.17 mg/l |
| 24 Mar 2026, 13:04 | 0.22 | 0.22 mg/l |
| 23 Feb 2026, 14:06 | 0.26 | 0.26 mg/l |
| 20 Jan 2026, 11:22 | 0.27 | 0.27 mg/l |
| 6 Aug 2025, 15:35 | 0.16 | 0.16 mg/l |
| 7 Feb 2025, 13:27 | 0.24 | 0.24 mg/l |
| 24 Jan 2025, 12:04 | 0.33 | 0.33 mg/l |
| 4 Dec 2024, 13:39 | 0.24 | 0.24 mg/l |
| 20 Nov 2024, 12:11 | 0.24 | 0.24 mg/l |
| 16 Oct 2024, 13:27 | 0.27 | 0.27 mg/l |
| 27 Sep 2024, 12:38 | 0.33 | 0.33 mg/l |
| 19 Aug 2024, 10:51 | 0.17 | 0.17 mg/l |
| 29 Jul 2024, 11:40 | 0.18 | 0.18 mg/l |
| 24 Jun 2024, 13:30 | 0.2 | 0.2 mg/l |
| 30 May 2024, 13:45 | 0.24 | 0.24 mg/l |
| 17 Apr 2024, 11:44 | 0.24 | 0.24 mg/l |
| 27 Feb 2024, 11:34 | 0.29 | 0.29 mg/l |
| 15 Jan 2024, 12:46 | 0.25 | 0.25 mg/l |
| 7 Dec 2023, 10:13 | 0.28 | 0.28 mg/l |
| 21 Nov 2023, 11:50 | 0.26 | 0.26 mg/l |
| 20 Oct 2023, 11:08 | 0.37 | 0.37 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
631 µS/cm
Sampled 5 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 631 | 631 µS/cm |
| 9 Apr 2026, 12:15 | 631 | 631 µS/cm |
| 24 Mar 2026, 13:04 | 621 | 621 µS/cm |
| 23 Feb 2026, 14:06 | 568 | 568 µS/cm |
| 20 Jan 2026, 11:22 | 547 | 547 µS/cm |
| 6 Aug 2025, 15:35 | 649 | 649 µS/cm |
| 7 Feb 2025, 13:27 | 605 | 605 µS/cm |
| 24 Jan 2025, 12:04 | 529 | 529 µS/cm |
| 4 Dec 2024, 13:39 | 598 | 598 µS/cm |
| 20 Nov 2024, 12:11 | 617 | 617 µS/cm |
| 16 Oct 2024, 13:27 | 573 | 573 µS/cm |
| 27 Sep 2024, 12:38 | 533 | 533 µS/cm |
| 19 Aug 2024, 10:51 | 649 | 649 µS/cm |
| 29 Jul 2024, 11:40 | 642 | 642 µS/cm |
| 24 Jun 2024, 13:30 | 640 | 640 µS/cm |
| 30 May 2024, 13:45 | 625 | 625 µS/cm |
| 17 Apr 2024, 11:44 | 610 | 610 µS/cm |
| 27 Feb 2024, 11:34 | 547 | 547 µS/cm |
| 15 Jan 2024, 12:46 | 599 | 599 µS/cm |
| 7 Dec 2023, 10:13 | 577 | 577 µS/cm |
| 21 Nov 2023, 11:50 | 585 | 585 µS/cm |
| 20 Oct 2023, 11:08 | 561 | 561 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Oct 2023 – May 2026 | 95.6% 5 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – May 2026 | 9.96 mg/l 5 May 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – May 2026 | 13.4 °C 5 May 2026 |
| pH 0061 | River water | 22 | Oct 2023 – May 2026 | 8.01 5 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – May 2026 | below 0.03 mg/l 5 May 2026 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – May 2026 | 7.09 mg/l 5 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Oct 2023 – May 2026 | 0.19 mg/l 5 May 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – May 2026 | 631 µS/cm 5 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – May 2026 | 260 mg/l 5 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – May 2026 | below 0.0007 mg/l 5 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 18 | Feb 2024 – May 2026 | 1.5 mg/l 5 May 2026 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – May 2026 | 0.015 mg/l 5 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – May 2026 | 7.1 mg/l 5 May 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.