850 m downstream of Hailsham South
EA name: 850M D/S HAILSHAM SOUTH (also listed as “850M DOWNSTREAM HAILSHAM SOUTH”)
Environment Agency sampling point SO-F0017662 · 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
- 7 Aug 2026, 08:4655 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 30 since 30 Nov 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 560654, 108172As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Horse Eye SewerPlaced by position alone (the only river line close by), 3 m from the line.
- Next gauge downstream
- Pevensey On the Salt Haven · 9.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (30 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
87.8%
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 87.8 | 87.8% |
| 7 Jul 2026, 11:43 | 75.5 | 75.5% |
| 1 Jun 2026, 12:38 | 78.6 | 78.6% |
| 6 May 2026, 13:41 | 117.6 | 117.6% |
| 21 Apr 2026, 14:02 | 106.6 | 106.6% |
| 12 Mar 2026, 10:40 | 109.5 | 109.5% |
| 27 Feb 2026, 08:49 | 93.4 | 93.4% |
| 13 Jan 2026, 14:15 | 91.5 | 91.5% |
| 17 Dec 2025, 15:12 | 88.9 | 88.9% |
| 27 Nov 2025, 11:18 | 95.8 | 95.8% |
| 26 Nov 2025, 12:30 | 94 | 94% |
| 31 Oct 2025, 11:40 | 90.2 | 90.2% |
| 10 Oct 2025, 12:23 | 81.6 | 81.6% |
| 22 Jul 2025, 08:34 | 59.7 | 59.7% |
| 23 Jun 2025, 15:30 | 112.1 | 112.1% |
| 16 May 2025, 09:49 | 96.1 | 96.1% |
| 30 Apr 2025, 10:07 | 50.3 | 50.3% |
| 9 Apr 2025, 15:10 | 135.7 | 135.7% |
| 28 Feb 2025, 13:33 | 124.8 | 124.8% |
| 21 Jan 2025, 14:13 | 32.8 | 32.8% |
| 13 Dec 2024, 12:10 | 87.1 | 87.1% |
| 12 Nov 2024, 10:56 | 100.8 | 100.8% |
| 14 Oct 2024, 09:47 | 84.2 | 84.2% |
| 27 Sep 2024, 10:49 | 82.4 | 82.4% |
| 23 Sep 2024, 13:23 | 96.7 | 96.7% |
| 22 Aug 2024, 10:48 | 57.5 | 57.5% |
| 17 Jul 2024, 13:08 | 91.7 | 91.7% |
| 12 Mar 2024, 14:46 | 91 | 91% |
| 17 Jan 2024, 12:40 | 78.3 | 78.3% |
| 30 Nov 2023, 14:18 | 86.9 | 86.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.33 mg/l
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 8.33 | 8.33 mg/l |
| 7 Jul 2026, 11:43 | 6.72 | 6.72 mg/l |
| 1 Jun 2026, 12:38 | 8.12 | 8.12 mg/l |
| 6 May 2026, 13:41 | 11.3 | 11.3 mg/l |
| 21 Apr 2026, 14:02 | 10.9 | 10.9 mg/l |
| 12 Mar 2026, 10:40 | 11.8 | 11.8 mg/l |
| 27 Feb 2026, 08:49 | 10.1 | 10.1 mg/l |
| 13 Jan 2026, 14:15 | 10.2 | 10.2 mg/l |
| 17 Dec 2025, 15:12 | 9.57 | 9.57 mg/l |
| 27 Nov 2025, 11:18 | 10.1 | 10.1 mg/l |
| 26 Nov 2025, 12:30 | 10.1 | 10.1 mg/l |
| 31 Oct 2025, 11:40 | 9 | 9 mg/l |
| 10 Oct 2025, 12:23 | 7.9 | 7.9 mg/l |
| 22 Jul 2025, 08:34 | 5.46 | 5.46 mg/l |
| 23 Jun 2025, 15:30 | 9.95 | 9.95 mg/l |
| 16 May 2025, 09:49 | 9.78 | 9.78 mg/l |
| 30 Apr 2025, 10:07 | 5.04 | 5.04 mg/l |
| 9 Apr 2025, 15:10 | 14.4 | 14.4 mg/l |
| 28 Feb 2025, 13:33 | 13.5 | 13.5 mg/l |
| 21 Jan 2025, 14:13 | 3.83 | 3.83 mg/l |
| 13 Dec 2024, 12:10 | 9.64 | 9.64 mg/l |
| 12 Nov 2024, 10:56 | 10.5 | 10.5 mg/l |
| 14 Oct 2024, 09:47 | 8.59 | 8.59 mg/l |
| 27 Sep 2024, 10:49 | 8.41 | 8.41 mg/l |
| 23 Sep 2024, 13:23 | 8.96 | 8.96 mg/l |
| 22 Aug 2024, 10:48 | 5.42 | 5.42 mg/l |
| 17 Jul 2024, 13:08 | 8.16 | 8.16 mg/l |
| 12 Mar 2024, 14:46 | 10 | 10 mg/l |
| 17 Jan 2024, 12:40 | 9.11 | 9.11 mg/l |
| 30 Nov 2023, 14:18 | 9.69 | 9.69 mg/l |
Water temperature
code 0076 · °C
17.7 °C
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 17.7 | 17.7 °C |
| 7 Jul 2026, 11:43 | 20.9 | 20.9 °C |
| 1 Jun 2026, 12:38 | 13.7 | 13.7 °C |
| 6 May 2026, 13:41 | 17.2 | 17.2 °C |
| 21 Apr 2026, 14:02 | 14.3 | 14.3 °C |
| 12 Mar 2026, 10:40 | 12 | 12 °C |
| 27 Feb 2026, 08:49 | 11.6 | 11.6 °C |
| 13 Jan 2026, 14:15 | 10.2 | 10.2 °C |
| 17 Dec 2025, 15:12 | 11.9 | 11.9 °C |
| 27 Nov 2025, 11:18 | 12.9 | 12.9 °C |
| 26 Nov 2025, 12:30 | 11.8 | 11.8 °C |
| 31 Oct 2025, 11:40 | 15.3 | 15.3 °C |
| 10 Oct 2025, 12:23 | 16.7 | 16.7 °C |
| 22 Jul 2025, 08:34 | 19.5 | 19.5 °C |
| 23 Jun 2025, 15:30 | 21 | 21 °C |
| 16 May 2025, 09:49 | 14.4 | 14.4 °C |
| 30 Apr 2025, 10:07 | 15.1 | 15.1 °C |
| 9 Apr 2025, 15:10 | 12.6 | 12.6 °C |
| 28 Feb 2025, 13:33 | 11.8 | 11.8 °C |
| 21 Jan 2025, 14:13 | 8.4 | 8.4 °C |
| 13 Dec 2024, 12:10 | 10.7 | 10.7 °C |
| 12 Nov 2024, 10:56 | 13.2 | 13.2 °C |
| 14 Oct 2024, 09:47 | 14.3 | 14.3 °C |
| 27 Sep 2024, 10:49 | 14.3 | 14.3 °C |
| 23 Sep 2024, 13:23 | 18.9 | 18.9 °C |
| 22 Aug 2024, 10:48 | 18 | 18 °C |
| 17 Jul 2024, 13:08 | 20.9 | 20.9 °C |
| 12 Mar 2024, 14:46 | 11 | 11 °C |
| 17 Jan 2024, 12:40 | 8.6 | 8.6 °C |
| 30 Nov 2023, 14:18 | 10.4 | 10.4 °C |
pH
code 0061
7.42
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 7.42 | 7.42 |
| 7 Jul 2026, 11:43 | 6.95 | 6.95 |
| 1 Jun 2026, 12:38 | 6.98 | 6.98 |
| 6 May 2026, 13:41 | 6.99 | 6.99 |
| 21 Apr 2026, 14:02 | 7.17 | 7.17 |
| 12 Mar 2026, 10:40 | 7.08 | 7.08 |
| 27 Feb 2026, 08:49 | 7.07 | 7.07 |
| 13 Jan 2026, 14:15 | 6.84 | 6.84 |
| 17 Dec 2025, 15:12 | 6.89 | 6.89 |
| 27 Nov 2025, 11:18 | 6.95 | 6.95 |
| 26 Nov 2025, 12:30 | 7.02 | 7.02 |
| 31 Oct 2025, 11:40 | 6.97 | 6.97 |
| 10 Oct 2025, 12:23 | 7.06 | 7.06 |
| 22 Jul 2025, 08:34 | 6.67 | 6.67 |
| 23 Jun 2025, 15:30 | 7.03 | 7.03 |
| 16 May 2025, 09:49 | 7.5 | 7.5 |
| 30 Apr 2025, 10:07 | 7.21 | 7.21 |
| 9 Apr 2025, 15:10 | 7.22 | 7.22 |
| 28 Feb 2025, 13:33 | 7.12 | 7.12 |
| 21 Jan 2025, 14:13 | 7.04 | 7.04 |
| 13 Dec 2024, 12:10 | 6.89 | 6.89 |
| 12 Nov 2024, 10:56 | 7.02 | 7.02 |
| 14 Oct 2024, 09:47 | 7.05 | 7.05 |
| 27 Sep 2024, 10:49 | 7.25 | 7.25 |
| 23 Sep 2024, 13:23 | 6.97 | 6.97 |
| 22 Aug 2024, 10:48 | 6.95 | 6.95 |
| 17 Jul 2024, 13:08 | 7.1 | 7.1 |
| 12 Mar 2024, 14:46 | 7.04 | 7.04 |
| 17 Jan 2024, 12:40 | 7.01 | 7.01 |
| 30 Nov 2023, 14:18 | 6.96 | 6.96 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Aug 2026, 55 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jul 2026, 11:43 | 0.043 | 0.043 mg/l |
| 1 Jun 2026, 12:38 | 0.04 | 0.04 mg/l |
| 6 May 2026, 13:41 | 0.037 | 0.037 mg/l |
| 21 Apr 2026, 14:02 | 2.5 | 2.5 mg/l |
| 12 Mar 2026, 10:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Feb 2026, 08:49 | 0.21 | 0.21 mg/l |
| 13 Jan 2026, 14:15 | 1.2 | 1.2 mg/l |
| 17 Dec 2025, 15:12 | 0.099 | 0.099 mg/l |
| 27 Nov 2025, 11:18 | 0.053 | 0.053 mg/l |
| 26 Nov 2025, 12:30 | 0.053 | 0.053 mg/l |
| 31 Oct 2025, 11:40 | 0.045 | 0.045 mg/l |
| 10 Oct 2025, 12:23 | 0.046 | 0.046 mg/l |
| 22 Jul 2025, 08:34 | 0.058 | 0.058 mg/l |
| 23 Jun 2025, 15:30 | 0.13 | 0.13 mg/l |
| 16 May 2025, 09:49 | 0.066 | 0.066 mg/l |
| 30 Apr 2025, 10:07 | 2.1 | 2.1 mg/l |
| 9 Apr 2025, 15:10 | 0.24 | 0.24 mg/l |
| 28 Feb 2025, 13:33 | 0.083 | 0.083 mg/l |
| 21 Jan 2025, 14:13 | 3.6 | 3.6 mg/l |
| 12 Nov 2024, 10:56 | 0.064 | 0.064 mg/l |
| 14 Oct 2024, 09:47 | 0.11 | 0.11 mg/l |
| 27 Sep 2024, 10:49 | 0.3 | 0.3 mg/l |
| 23 Sep 2024, 13:23 | 0.16 | 0.16 mg/l |
| 22 Aug 2024, 10:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 13:08 | 0.054 | 0.054 mg/l |
| 12 Mar 2024, 14:46 | 0.73 | 0.73 mg/l |
| 17 Jan 2024, 12:40 | 0.25 | 0.25 mg/l |
| 30 Nov 2023, 14:18 | 0.065 | 0.065 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
23.6 mg/l
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 23.6 | 23.6 mg/l |
| 7 Jul 2026, 11:43 | 30 | 30 mg/l |
| 1 Jun 2026, 12:38 | 32.9 | 32.9 mg/l |
| 6 May 2026, 13:41 | 29.9 | 29.9 mg/l |
| 21 Apr 2026, 14:02 | 14.6 | 14.6 mg/l |
| 12 Mar 2026, 10:40 | 11.9 | 11.9 mg/l |
| 27 Feb 2026, 08:49 | 17.8 | 17.8 mg/l |
| 13 Jan 2026, 14:15 | 11.4 | 11.4 mg/l |
| 17 Dec 2025, 15:12 | 23.9 | 23.9 mg/l |
| 27 Nov 2025, 11:18 | 21 | 21 mg/l |
| 26 Nov 2025, 12:30 | 18 | 18 mg/l |
| 31 Oct 2025, 11:40 | 13.9 | 13.9 mg/l |
| 10 Oct 2025, 12:23 | 19.9 | 19.9 mg/l |
| 22 Jul 2025, 08:34 | 7.37 | 7.37 mg/l |
| 23 Jun 2025, 15:30 | 13.8 | 13.8 mg/l |
| 16 May 2025, 09:49 | 13.7 | 13.7 mg/l |
| 30 Apr 2025, 10:07 | 6.22 | 6.22 mg/l |
| 9 Apr 2025, 15:10 | 16.7 | 16.7 mg/l |
| 28 Feb 2025, 13:33 | 13.9 | 13.9 mg/l |
| 21 Jan 2025, 14:13 | 12.1 | 12.1 mg/l |
| 13 Dec 2024, 12:10 | 17.9 | 17.9 mg/l |
| 12 Nov 2024, 10:56 | 26.9 | 26.9 mg/l |
| 14 Oct 2024, 09:47 | 19.6 | 19.6 mg/l |
| 27 Sep 2024, 10:49 | 5.76 | 5.76 mg/l |
| 23 Sep 2024, 13:23 | 4.78 | 4.78 mg/l |
| 22 Aug 2024, 10:48 | 15 | 15 mg/l |
| 17 Jul 2024, 13:08 | 18.9 | 18.9 mg/l |
| 12 Mar 2024, 14:46 | 9.59 | 9.59 mg/l |
| 17 Jan 2024, 12:40 | 23.2 | 23.2 mg/l |
| 30 Nov 2023, 14:18 | 19.9 | 19.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.026 mg/l
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 0.026 | 0.026 mg/l |
| 7 Jul 2026, 11:43 | 0.026 | 0.026 mg/l |
| 1 Jun 2026, 12:38 | 0.024 | 0.024 mg/l |
| 6 May 2026, 13:41 | 0.016 | 0.016 mg/l |
| 21 Apr 2026, 14:02 | 0.012 | 0.012 mg/l |
| 12 Mar 2026, 10:40 | 0.013 | 0.013 mg/l |
| 27 Feb 2026, 08:49 | 0.019 | 0.019 mg/l |
| 13 Jan 2026, 14:15 | 0.045 | 0.045 mg/l |
| 17 Dec 2025, 15:12 | 0.013 | 0.013 mg/l |
| 27 Nov 2025, 11:18 | 0.019 | 0.019 mg/l |
| 26 Nov 2025, 12:30 | 0.011 | 0.011 mg/l |
| 31 Oct 2025, 11:40 | 0.018 | 0.018 mg/l |
| 10 Oct 2025, 12:23 | 0.025 | 0.025 mg/l |
| 22 Jul 2025, 08:34 | 0.024 | 0.024 mg/l |
| 23 Jun 2025, 15:30 | 0.038 | 0.038 mg/l |
| 16 May 2025, 09:49 | 0.03 | 0.03 mg/l |
| 30 Apr 2025, 10:07 | 0.027 | 0.027 mg/l |
| 9 Apr 2025, 15:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 28 Feb 2025, 13:33 | 0.011 | 0.011 mg/l |
| 21 Jan 2025, 14:13 | 0.015 | 0.015 mg/l |
| 13 Dec 2024, 12:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 12 Nov 2024, 10:56 | 0.021 | 0.021 mg/l |
| 14 Oct 2024, 09:47 | 0.026 | 0.026 mg/l |
| 27 Sep 2024, 10:49 | 0.13 | 0.13 mg/l |
| 23 Sep 2024, 13:23 | 0.037 | 0.037 mg/l |
| 22 Aug 2024, 10:48 | 0.018 | 0.018 mg/l |
| 17 Jul 2024, 13:08 | 0.044 | 0.044 mg/l |
| 12 Mar 2024, 14:46 | 0.024 | 0.024 mg/l |
| 17 Jan 2024, 12:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 Nov 2023, 14:18 | 0.011 | 0.011 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1129 µS/cm
Sampled 7 Aug 2026, 55 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 08:46 | 1129 | 1129 µS/cm |
| 7 Jul 2026, 11:43 | 1090 | 1090 µS/cm |
| 1 Jun 2026, 12:38 | 1101 | 1101 µS/cm |
| 6 May 2026, 13:41 | 1025 | 1025 µS/cm |
| 21 Apr 2026, 14:02 | 1055 | 1055 µS/cm |
| 12 Mar 2026, 10:40 | 732 | 732 µS/cm |
| 27 Feb 2026, 08:49 | 856 | 856 µS/cm |
| 13 Jan 2026, 14:15 | 746 | 746 µS/cm |
| 17 Dec 2025, 15:12 | 1032 | 1032 µS/cm |
| 27 Nov 2025, 11:18 | 957 | 957 µS/cm |
| 26 Nov 2025, 12:30 | 925 | 925 µS/cm |
| 31 Oct 2025, 11:40 | 845 | 845 µS/cm |
| 10 Oct 2025, 12:23 | 1068 | 1068 µS/cm |
| 22 Jul 2025, 08:34 | 762 | 762 µS/cm |
| 23 Jun 2025, 15:30 | 1064 | 1064 µS/cm |
| 16 May 2025, 09:49 | 1071 | 1071 µS/cm |
| 30 Apr 2025, 10:07 | 994 | 994 µS/cm |
| 9 Apr 2025, 15:10 | 1047 | 1047 µS/cm |
| 28 Feb 2025, 13:33 | 798 | 798 µS/cm |
| 21 Jan 2025, 14:13 | 1046 | 1046 µS/cm |
| 13 Dec 2024, 12:10 | 899 | 899 µS/cm |
| 12 Nov 2024, 10:56 | 1029 | 1029 µS/cm |
| 14 Oct 2024, 09:47 | 861 | 861 µS/cm |
| 27 Sep 2024, 10:49 | 535 | 535 µS/cm |
| 23 Sep 2024, 13:23 | 486 | 486 µS/cm |
| 22 Aug 2024, 10:48 | 995 | 995 µS/cm |
| 17 Jul 2024, 13:08 | 875 | 875 µS/cm |
| 12 Mar 2024, 14:46 | 520 | 520 µS/cm |
| 17 Jan 2024, 12:40 | 968 | 968 µS/cm |
| 30 Nov 2023, 14:18 | 814 | 814 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 | 30 | Nov 2023 – Aug 2026 | 87.8% 7 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Nov 2023 – Aug 2026 | 8.33 mg/l 7 Aug 2026 |
| Temperature of Water 0076 | River water | 30 | Nov 2023 – Aug 2026 | 17.7 °C 7 Aug 2026 |
| pH 0061 | River water | 30 | Nov 2023 – Aug 2026 | 7.42 7 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Nov 2023 – Aug 2026 | below 0.03 mg/l 7 Aug 2026 |
| Nitrate as N 0117 | River water | 30 | Nov 2023 – Aug 2026 | 23.6 mg/l 7 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Nov 2023 – Aug 2026 | 0.026 mg/l 7 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 30 | Nov 2023 – Aug 2026 | 1129 µS/cm 7 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Nov 2023 – Aug 2026 | 92 mg/l 7 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Nov 2023 – Aug 2026 | below 0.00026 mg/l 7 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 29 | Nov 2023 – Aug 2026 | below 6 mg/l 7 Aug 2026 |
| Chloride 0172 | River water | 30 | Nov 2023 – Aug 2026 | 190 mg/l 7 Aug 2026 |
| Nitrite as N 0118 | River water | 30 | Nov 2023 – Aug 2026 | 0.38 mg/l 7 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Nov 2023 – Aug 2026 | 24 mg/l 7 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 30 | Nov 2023 – Aug 2026 | 5.3 mg/l 7 Aug 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.