Hampshire Avon upstream of Netheravon sewage treatment works
EA name: HAMPSHIRE AVON U/S NETHERAVON STW
Environment Agency sampling point SW-50210469 · 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
- 3 Aug 2026, 13:1159 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 20 since 12 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 414997, 148542As 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, 8 m from the line.
- Next gauge downstream
- Amesbury On the River Avon · 13 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Upavon East On the River Avon · 11 km along the riverUpavon West On the River Avon · 11 km along the river
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
123.6%
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 123.6 | 123.6% |
| 3 Jul 2026, 11:39 | 109.3 | 109.3% |
| 5 Jun 2026, 10:34 | 99.2 | 99.2% |
| 5 May 2026, 10:07 | 102.3 | 102.3% |
| 13 Apr 2026, 11:50 | 104.7 | 104.7% |
| 5 Mar 2026, 11:28 | 98.7 | 98.7% |
| 2 Feb 2026, 10:25 | 88 | 88% |
| 7 Jan 2026, 13:19 | 97.7 | 97.7% |
| 2 Dec 2025, 11:58 | 94.2 | 94.2% |
| 4 Nov 2025, 11:07 | 95.1 | 95.1% |
| 10 Oct 2025, 11:40 | 94.8 | 94.8% |
| 26 Sep 2025, 12:53 | 102.3 | 102.3% |
| 21 Aug 2025, 10:02 | 102.1 | 102.1% |
| 9 Apr 2025, 11:05 | 105 | 105% |
| 4 Mar 2024, 11:45 | 97.7 | 97.7% |
| 1 Feb 2024, 11:33 | 94.4 | 94.4% |
| 12 Jan 2024, 11:37 | 90.2 | 90.2% |
| 4 Dec 2023, 13:10 | 91.7 | 91.7% |
| 14 Nov 2023, 10:55 | 85.7 | 85.7% |
| 12 Oct 2023, 12:32 | 92.8 | 92.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 11.7 | 11.7 mg/l |
| 3 Jul 2026, 11:39 | 10.8 | 10.8 mg/l |
| 5 Jun 2026, 10:34 | 10.4 | 10.4 mg/l |
| 5 May 2026, 10:07 | 10.9 | 10.9 mg/l |
| 13 Apr 2026, 11:50 | 11.5 | 11.5 mg/l |
| 5 Mar 2026, 11:28 | 11.2 | 11.2 mg/l |
| 2 Feb 2026, 10:25 | 10.4 | 10.4 mg/l |
| 7 Jan 2026, 13:19 | 12.1 | 12.1 mg/l |
| 2 Dec 2025, 11:58 | 10.9 | 10.9 mg/l |
| 4 Nov 2025, 11:07 | 10.2 | 10.2 mg/l |
| 10 Oct 2025, 11:40 | 10.1 | 10.1 mg/l |
| 26 Sep 2025, 12:53 | 11.3 | 11.3 mg/l |
| 21 Aug 2025, 10:02 | 10.5 | 10.5 mg/l |
| 9 Apr 2025, 11:05 | 11.9 | 11.9 mg/l |
| 4 Mar 2024, 11:45 | 11.6 | 11.6 mg/l |
| 1 Feb 2024, 11:33 | 10.9 | 10.9 mg/l |
| 12 Jan 2024, 11:37 | 10.8 | 10.8 mg/l |
| 4 Dec 2023, 13:10 | 10.6 | 10.6 mg/l |
| 14 Nov 2023, 10:55 | 9.56 | 9.56 mg/l |
| 12 Oct 2023, 12:32 | 9.65 | 9.65 mg/l |
Water temperature
code 0076 · °C
17.9 °C
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 17.9 | 17.9 °C |
| 3 Jul 2026, 11:39 | 16 | 16 °C |
| 5 Jun 2026, 10:34 | 13.1 | 13.1 °C |
| 5 May 2026, 10:07 | 12.3 | 12.3 °C |
| 13 Apr 2026, 11:50 | 10.9 | 10.9 °C |
| 5 Mar 2026, 11:28 | 9.7 | 9.7 °C |
| 2 Feb 2026, 10:25 | 8.2 | 8.2 °C |
| 7 Jan 2026, 13:19 | 6 | 6 °C |
| 2 Dec 2025, 11:58 | 8.8 | 8.8 °C |
| 4 Nov 2025, 11:07 | 12.1 | 12.1 °C |
| 10 Oct 2025, 11:40 | 12.4 | 12.4 °C |
| 26 Sep 2025, 12:53 | 10.7 | 10.7 °C |
| 21 Aug 2025, 10:02 | 14 | 14 °C |
| 9 Apr 2025, 11:05 | 9.6 | 9.6 °C |
| 4 Mar 2024, 11:45 | 7.7 | 7.7 °C |
| 1 Feb 2024, 11:33 | 8.9 | 8.9 °C |
| 12 Jan 2024, 11:37 | 7.4 | 7.4 °C |
| 4 Dec 2023, 13:10 | 8.9 | 8.9 °C |
| 14 Nov 2023, 10:55 | 10.4 | 10.4 °C |
| 12 Oct 2023, 12:32 | 13.5 | 13.5 °C |
pH
code 0061
8.43
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 8.43 | 8.43 |
| 3 Jul 2026, 11:39 | 8.11 | 8.11 |
| 5 Jun 2026, 10:34 | 7.97 | 7.97 |
| 5 May 2026, 10:07 | 7.9 | 7.9 |
| 13 Apr 2026, 11:50 | 7.87 | 7.87 |
| 5 Mar 2026, 11:28 | 7.64 | 7.64 |
| 2 Feb 2026, 10:25 | 7.92 | 7.92 |
| 7 Jan 2026, 13:19 | 8.01 | 8.01 |
| 2 Dec 2025, 11:58 | 8.02 | 8.02 |
| 4 Nov 2025, 11:07 | 8.03 | 8.03 |
| 10 Oct 2025, 11:40 | 8.07 | 8.07 |
| 26 Sep 2025, 12:53 | 8.31 | 8.31 |
| 21 Aug 2025, 10:02 | 8.19 | 8.19 |
| 9 Apr 2025, 11:05 | 8.01 | 8.01 |
| 4 Mar 2024, 11:45 | 7.85 | 7.85 |
| 1 Feb 2024, 11:33 | 7.82 | 7.82 |
| 12 Jan 2024, 11:37 | 7.81 | 7.81 |
| 4 Dec 2023, 13:10 | 7.76 | 7.76 |
| 14 Nov 2023, 10:55 | 7.86 | 7.86 |
| 12 Oct 2023, 12:32 | 7.89 | 7.89 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2026, 11:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2026, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 May 2026, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 13:19 | 0.048 | 0.048 mg/l |
| 2 Dec 2025, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Oct 2025, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2025, 12:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2025, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 11:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Feb 2024, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jan 2024, 11:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2023, 13:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Nov 2023, 10:55 | 0.042 | 0.042 mg/l |
| 12 Oct 2023, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.68 mg/l
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 6.68 | 6.68 mg/l |
| 3 Jul 2026, 11:39 | 6.38 | 6.38 mg/l |
| 5 Jun 2026, 10:34 | 6.08 | 6.08 mg/l |
| 5 May 2026, 10:07 | 6.48 | 6.48 mg/l |
| 13 Apr 2026, 11:50 | 6.49 | 6.49 mg/l |
| 5 Mar 2026, 11:28 | 6.59 | 6.59 mg/l |
| 2 Feb 2026, 10:25 | 5.19 | 5.19 mg/l |
| 7 Jan 2026, 13:19 | 7.06 | 7.06 mg/l |
| 2 Dec 2025, 11:58 | 5.25 | 5.25 mg/l |
| 4 Nov 2025, 11:07 | 5.89 | 5.89 mg/l |
| 10 Oct 2025, 11:40 | 6.38 | 6.38 mg/l |
| 26 Sep 2025, 12:53 | 6.99 | 6.99 mg/l |
| 21 Aug 2025, 10:02 | 6.78 | 6.78 mg/l |
| 9 Apr 2025, 11:05 | 6.98 | 6.98 mg/l |
| 4 Mar 2024, 11:45 | 6.18 | 6.18 mg/l |
| 1 Feb 2024, 11:33 | 6.88 | 6.88 mg/l |
| 12 Jan 2024, 11:37 | 6.78 | 6.78 mg/l |
| 4 Dec 2023, 13:10 | 5.38 | 5.38 mg/l |
| 14 Nov 2023, 10:55 | 5.28 | 5.28 mg/l |
| 12 Oct 2023, 12:32 | 6.19 | 6.19 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.11 mg/l
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 0.11 | 0.11 mg/l |
| 3 Jul 2026, 11:39 | 0.13 | 0.13 mg/l |
| 5 Jun 2026, 10:34 | 0.14 | 0.14 mg/l |
| 5 May 2026, 10:07 | 0.098 | 0.098 mg/l |
| 13 Apr 2026, 11:50 | 0.098 | 0.098 mg/l |
| 5 Mar 2026, 11:28 | 0.11 | 0.11 mg/l |
| 2 Feb 2026, 10:25 | 0.16 | 0.16 mg/l |
| 7 Jan 2026, 13:19 | 0.11 | 0.11 mg/l |
| 2 Dec 2025, 11:58 | 0.15 | 0.15 mg/l |
| 4 Nov 2025, 11:07 | 0.14 | 0.14 mg/l |
| 10 Oct 2025, 11:40 | 0.15 | 0.15 mg/l |
| 26 Sep 2025, 12:53 | 0.14 | 0.14 mg/l |
| 21 Aug 2025, 10:02 | 0.15 | 0.15 mg/l |
| 9 Apr 2025, 11:05 | 0.07 | 0.07 mg/l |
| 4 Mar 2024, 11:45 | 0.14 | 0.14 mg/l |
| 1 Feb 2024, 11:33 | 0.12 | 0.12 mg/l |
| 12 Jan 2024, 11:37 | 0.12 | 0.12 mg/l |
| 4 Dec 2023, 13:10 | 0.17 | 0.17 mg/l |
| 14 Nov 2023, 10:55 | 0.17 | 0.17 mg/l |
| 12 Oct 2023, 12:32 | 0.14 | 0.14 mg/l |
Turbidity
code 6396 · NTU
1.6 NTU
Sampled 5 Mar 2026, 7 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Mar 2026, 11:28 | 1.6 | 1.6 NTU |
| 2 Feb 2026, 10:25 | 6 | 6 NTU |
| 7 Jan 2026, 13:19 | 2.8 | 2.8 NTU |
| 2 Dec 2025, 11:58 | 11 | 11 NTU |
| 4 Nov 2025, 11:07 | 3.5 | 3.5 NTU |
| 10 Oct 2025, 11:40 | 3.1 | 3.1 NTU |
| 26 Sep 2025, 12:53 | 2.9 | 2.9 NTU |
| 21 Aug 2025, 10:02 | 2.5 | 2.5 NTU |
| 9 Apr 2025, 11:05 | 4.5 | 4.5 NTU |
| 4 Mar 2024, 11:45 | 4.4 | 4.4 NTU |
| 1 Feb 2024, 11:33 | 5.3 | 5.3 NTU |
| 12 Jan 2024, 11:37 | 3.9 | 3.9 NTU |
| 4 Dec 2023, 13:10 | 39 | 39 NTU |
| 14 Nov 2023, 10:55 | 8 | 8 NTU |
| 12 Oct 2023, 12:32 | 1 | 1 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
632 µS/cm
Sampled 3 Aug 2026, 59 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:11 | 632 | 632 µS/cm |
| 3 Jul 2026, 11:39 | 627 | 627 µS/cm |
| 5 Jun 2026, 10:34 | 616 | 616 µS/cm |
| 5 May 2026, 10:07 | 620 | 620 µS/cm |
| 13 Apr 2026, 11:50 | 614 | 614 µS/cm |
| 5 Mar 2026, 11:28 | 614 | 614 µS/cm |
| 2 Feb 2026, 10:25 | 557 | 557 µS/cm |
| 7 Jan 2026, 13:19 | 642 | 642 µS/cm |
| 2 Dec 2025, 11:58 | 641 | 641 µS/cm |
| 4 Nov 2025, 11:07 | 677 | 677 µS/cm |
| 10 Oct 2025, 11:40 | 659 | 659 µS/cm |
| 26 Sep 2025, 12:53 | 652 | 652 µS/cm |
| 21 Aug 2025, 10:02 | 663 | 663 µS/cm |
| 9 Apr 2025, 11:05 | 604 | 604 µS/cm |
| 4 Mar 2024, 11:45 | 583 | 583 µS/cm |
| 1 Feb 2024, 11:33 | 626 | 626 µS/cm |
| 12 Jan 2024, 11:37 | 616 | 616 µS/cm |
| 4 Dec 2023, 13:10 | 589 | 589 µS/cm |
| 14 Nov 2023, 10:55 | 610 | 610 µS/cm |
| 12 Oct 2023, 12:32 | 644 | 644 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Oct 2023 – Aug 2026 | 123.6% 3 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Aug 2026 | 11.7 mg/l 3 Aug 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Aug 2026 | 17.9 °C 3 Aug 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Aug 2026 | 8.43 3 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Oct 2023 – Aug 2026 | below 0.03 mg/l 3 Aug 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Aug 2026 | 6.68 mg/l 3 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Oct 2023 – Aug 2026 | 0.11 mg/l 3 Aug 2026 |
| Turbidity 6396 | River water | 15 | Oct 2023 – Mar 2026 | 1.6 NTU 5 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Aug 2026 | 632 µS/cm 3 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Oct 2023 – Aug 2026 | 250 mg/l 3 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Oct 2023 – Aug 2026 | below 0.00097 mg/l 3 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 12 | Oct 2023 – Mar 2026 | 3.2 µg/l 5 Mar 2026 |
| Nitrite as N 0118 | River water | 20 | Oct 2023 – Aug 2026 | 0.017 mg/l 3 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Aug 2026 | 6.7 mg/l 3 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 15 | Oct 2023 – Mar 2026 | 7.3 mg/l 5 Mar 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.