Downstream of Hailsham South (New) sewage treatment works
EA name: D/S HAILSHAM SOUTH (NEW) STW (also listed as “TRIBUTARY DOWNSTREAM HAILSHAM SOUTH (NEW) SEWAGE TREATMENT WORKS”)
Environment Agency sampling point SO-F0002028 · 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
- 23 Apr 2026, 10:065 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
- 26 since 28 Nov 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 560730, 108200As published, to the nearest 10 m. Open in a map
- River, by its own name
- Tributary
- River, by the map
- Not placedIts name gives Tributary; the only line close by, 6 m away, is Horse Eye Sewer and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Environmental monitoring statutory (EU directives) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.9%
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 89.9 | 89.9% |
| 12 Mar 2026, 10:07 | 96.2 | 96.2% |
| 27 Feb 2026, 09:06 | 95.7 | 95.7% |
| 8 Jan 2026, 15:27 | 96.5 | 96.5% |
| 9 Dec 2025, 16:28 | 94.9 | 94.9% |
| 3 Nov 2025, 13:45 | 93.9 | 93.9% |
| 10 Oct 2025, 11:30 | 92.6 | 92.6% |
| 9 Sep 2025, 10:35 | 88.7 | 88.7% |
| 12 Aug 2025, 15:17 | 79.2 | 79.2% |
| 29 Jul 2025, 10:12 | 85.1 | 85.1% |
| 3 Jun 2025, 10:24 | 92.3 | 92.3% |
| 6 May 2025, 09:22 | 78.4 | 78.4% |
| 1 Apr 2025, 11:19 | 97.1 | 97.1% |
| 5 Mar 2025, 15:20 | 94 | 94% |
| 26 Feb 2025, 12:48 | 95.1 | 95.1% |
| 30 Jan 2025, 09:53 | 90.9 | 90.9% |
| 13 Dec 2024, 12:54 | 89.3 | 89.3% |
| 25 Nov 2024, 15:36 | 96 | 96% |
| 14 Oct 2024, 10:02 | 92.1 | 92.1% |
| 27 Sep 2024, 10:26 | 90.4 | 90.4% |
| 27 Sep 2024, 10:25 | 90.8 | 90.8% |
| 23 Sep 2024, 15:02 | 95.7 | 95.7% |
| 26 Jul 2024, 15:23 | 92.7 | 92.7% |
| 12 Mar 2024, 14:12 | 95.5 | 95.5% |
| 7 Feb 2024, 13:05 | 98.4 | 98.4% |
| 28 Nov 2023, 15:40 | 89.9 | 89.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.16 mg/l
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 9.16 | 9.16 mg/l |
| 12 Mar 2026, 10:07 | 10.5 | 10.5 mg/l |
| 27 Feb 2026, 09:06 | 10.3 | 10.3 mg/l |
| 8 Jan 2026, 15:27 | 11.1 | 11.1 mg/l |
| 9 Dec 2025, 16:28 | 10.1 | 10.1 mg/l |
| 3 Nov 2025, 13:45 | 9.49 | 9.49 mg/l |
| 10 Oct 2025, 11:30 | 9.04 | 9.04 mg/l |
| 9 Sep 2025, 10:35 | 8.17 | 8.17 mg/l |
| 12 Aug 2025, 15:17 | 6.82 | 6.82 mg/l |
| 29 Jul 2025, 10:12 | 7.75 | 7.75 mg/l |
| 3 Jun 2025, 10:24 | 8.93 | 8.93 mg/l |
| 6 May 2025, 09:22 | 8.24 | 8.24 mg/l |
| 1 Apr 2025, 11:19 | 10.4 | 10.4 mg/l |
| 5 Mar 2025, 15:20 | 10.3 | 10.3 mg/l |
| 26 Feb 2025, 12:48 | 10.8 | 10.8 mg/l |
| 30 Jan 2025, 09:53 | 10.3 | 10.3 mg/l |
| 13 Dec 2024, 12:54 | 9.92 | 9.92 mg/l |
| 25 Nov 2024, 15:36 | 10.3 | 10.3 mg/l |
| 14 Oct 2024, 10:02 | 9.49 | 9.49 mg/l |
| 27 Sep 2024, 10:26 | 9.05 | 9.05 mg/l |
| 27 Sep 2024, 10:25 | 9.09 | 9.09 mg/l |
| 23 Sep 2024, 15:02 | 8.96 | 8.96 mg/l |
| 26 Jul 2024, 15:23 | 8.23 | 8.23 mg/l |
| 12 Mar 2024, 14:12 | 10.5 | 10.5 mg/l |
| 7 Feb 2024, 13:05 | 11 | 11 mg/l |
| 28 Nov 2023, 15:40 | 10.1 | 10.1 mg/l |
Water temperature
code 0076 · °C
14.4 °C
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 14.4 | 14.4 °C |
| 12 Mar 2026, 10:07 | 11.5 | 11.5 °C |
| 27 Feb 2026, 09:06 | 12.1 | 12.1 °C |
| 8 Jan 2026, 15:27 | 9 | 9 °C |
| 9 Dec 2025, 16:28 | 12.5 | 12.5 °C |
| 3 Nov 2025, 13:45 | 14.8 | 14.8 °C |
| 10 Oct 2025, 11:30 | 16.4 | 16.4 °C |
| 9 Sep 2025, 10:35 | 19.2 | 19.2 °C |
| 12 Aug 2025, 15:17 | 22.7 | 22.7 °C |
| 29 Jul 2025, 10:12 | 19.8 | 19.8 °C |
| 3 Jun 2025, 10:24 | 16.8 | 16.8 °C |
| 6 May 2025, 09:22 | 13 | 13 °C |
| 1 Apr 2025, 11:19 | 12.3 | 12.3 °C |
| 5 Mar 2025, 15:20 | 11.1 | 11.1 °C |
| 26 Feb 2025, 12:48 | 9.6 | 9.6 °C |
| 30 Jan 2025, 09:53 | 9.7 | 9.7 °C |
| 13 Dec 2024, 12:54 | 10.6 | 10.6 °C |
| 25 Nov 2024, 15:36 | 12.3 | 12.3 °C |
| 14 Oct 2024, 10:02 | 13.9 | 13.9 °C |
| 27 Sep 2024, 10:26 | 15.2 | 15.2 °C |
| 27 Sep 2024, 10:25 | 15.2 | 15.2 °C |
| 23 Sep 2024, 15:02 | 18.4 | 18.4 °C |
| 26 Jul 2024, 15:23 | 21.1 | 21.1 °C |
| 12 Mar 2024, 14:12 | 11 | 11 °C |
| 7 Feb 2024, 13:05 | 10.3 | 10.3 °C |
| 28 Nov 2023, 15:40 | 10.2 | 10.2 °C |
pH
code 0061
6.94
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 6.94 | 6.94 |
| 12 Mar 2026, 10:07 | 6.37 | 6.37 |
| 27 Feb 2026, 09:06 | 6.98 | 6.98 |
| 8 Jan 2026, 15:27 | 6.71 | 6.71 |
| 9 Dec 2025, 16:28 | 6.74 | 6.74 |
| 3 Nov 2025, 13:45 | 6.78 | 6.78 |
| 10 Oct 2025, 11:30 | 7.03 | 7.03 |
| 9 Sep 2025, 10:35 | 7.13 | 7.13 |
| 12 Aug 2025, 15:17 | 7.06 | 7.06 |
| 29 Jul 2025, 10:12 | 7.35 | 7.35 |
| 3 Jun 2025, 10:24 | 7.32 | 7.32 |
| 6 May 2025, 09:22 | 7.3 | 7.3 |
| 1 Apr 2025, 11:19 | 6.99 | 6.99 |
| 5 Mar 2025, 15:20 | 6.83 | 6.83 |
| 26 Feb 2025, 12:48 | 7.02 | 7.02 |
| 30 Jan 2025, 09:53 | 6.87 | 6.87 |
| 13 Dec 2024, 12:54 | 6.89 | 6.89 |
| 25 Nov 2024, 15:36 | 6.8 | 6.8 |
| 14 Oct 2024, 10:02 | 7.44 | 7.44 |
| 27 Sep 2024, 10:26 | 7.01 | 7.01 |
| 27 Sep 2024, 10:25 | 7.22 | 7.22 |
| 23 Sep 2024, 15:02 | 6.86 | 6.86 |
| 26 Jul 2024, 15:23 | 7.34 | 7.34 |
| 12 Mar 2024, 14:12 | 6.95 | 6.95 |
| 7 Feb 2024, 13:05 | 6.34 | 6.34 |
| 28 Nov 2023, 15:40 | 6.93 | 6.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
2.1 mg/l
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 2.1 | 2.1 mg/l |
| 12 Mar 2026, 10:07 | 0.051 | 0.051 mg/l |
| 27 Feb 2026, 09:06 | 0.12 | 0.12 mg/l |
| 8 Jan 2026, 15:27 | 0.051 | 0.051 mg/l |
| 9 Dec 2025, 16:28 | 0.05 | 0.05 mg/l |
| 3 Nov 2025, 13:45 | 0.19 | 0.19 mg/l |
| 10 Oct 2025, 11:30 | 0.069 | 0.069 mg/l |
| 9 Sep 2025, 10:35 | 0.11 | 0.11 mg/l |
| 12 Aug 2025, 15:17 | 0.51 | 0.51 mg/l |
| 29 Jul 2025, 10:12 | 0.31 | 0.31 mg/l |
| 3 Jun 2025, 10:24 | 0.099 | 0.099 mg/l |
| 6 May 2025, 09:22 | 2.3 | 2.3 mg/l |
| 1 Apr 2025, 11:19 | 0.51 | 0.51 mg/l |
| 5 Mar 2025, 15:20 | 0.56 | 0.56 mg/l |
| 26 Feb 2025, 12:48 | 0.13 | 0.13 mg/l |
| 30 Jan 2025, 09:53 | 0.69 | 0.69 mg/l |
| 13 Dec 2024, 12:54 | 0.61 | 0.61 mg/l |
| 25 Nov 2024, 15:36 | 0.046 | 0.046 mg/l |
| 14 Oct 2024, 10:02 | 1.8 | 1.8 mg/l |
| 27 Sep 2024, 10:26 | 0.33 | 0.33 mg/l |
| 27 Sep 2024, 10:25 | 0.33 | 0.33 mg/l |
| 23 Sep 2024, 15:02 | 0.056 | 0.056 mg/l |
| 26 Jul 2024, 15:23 | 0.12 | 0.12 mg/l |
| 12 Mar 2024, 14:12 | 0.66 | 0.66 mg/l |
| 7 Feb 2024, 13:05 | 0.16 | 0.16 mg/l |
| 28 Nov 2023, 15:40 | 0.044 | 0.044 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
19.6 mg/l
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 19.6 | 19.6 mg/l |
| 12 Mar 2026, 10:07 | 11.7 | 11.7 mg/l |
| 27 Feb 2026, 09:06 | 18.9 | 18.9 mg/l |
| 8 Jan 2026, 15:27 | 17.9 | 17.9 mg/l |
| 9 Dec 2025, 16:28 | 9.47 | 9.47 mg/l |
| 3 Nov 2025, 13:45 | 10.8 | 10.8 mg/l |
| 10 Oct 2025, 11:30 | 19.8 | 19.8 mg/l |
| 9 Sep 2025, 10:35 | 16.9 | 16.9 mg/l |
| 12 Aug 2025, 15:17 | 9.19 | 9.19 mg/l |
| 29 Jul 2025, 10:12 | 16.8 | 16.8 mg/l |
| 3 Jun 2025, 10:24 | 13.8 | 13.8 mg/l |
| 6 May 2025, 09:22 | 7.69 | 7.69 mg/l |
| 1 Apr 2025, 11:19 | 22.6 | 22.6 mg/l |
| 5 Mar 2025, 15:20 | 21.7 | 21.7 mg/l |
| 26 Feb 2025, 12:48 | 10.9 | 10.9 mg/l |
| 30 Jan 2025, 09:53 | 9.38 | 9.38 mg/l |
| 13 Dec 2024, 12:54 | 16.9 | 16.9 mg/l |
| 25 Nov 2024, 15:36 | 9.77 | 9.77 mg/l |
| 14 Oct 2024, 10:02 | 9.38 | 9.38 mg/l |
| 27 Sep 2024, 10:26 | 5.96 | 5.96 mg/l |
| 27 Sep 2024, 10:25 | 5.96 | 5.96 mg/l |
| 23 Sep 2024, 15:02 | 7.28 | 7.28 mg/l |
| 26 Jul 2024, 15:23 | 14.9 | 14.9 mg/l |
| 12 Mar 2024, 14:12 | 10.6 | 10.6 mg/l |
| 7 Feb 2024, 13:05 | 14.9 | 14.9 mg/l |
| 28 Nov 2023, 15:40 | 12.9 | 12.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.013 mg/l
Sampled 23 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 0.013 | 0.013 mg/l |
| 12 Mar 2026, 10:07 | 0.011 | 0.011 mg/l |
| 27 Feb 2026, 09:06 | 0.013 | 0.013 mg/l |
| 8 Jan 2026, 15:27 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Dec 2025, 16:28 | 0.022 | 0.022 mg/l |
| 3 Nov 2025, 13:45 | 0.022 | 0.022 mg/l |
| 10 Oct 2025, 11:30 | 0.015 | 0.015 mg/l |
| 9 Sep 2025, 10:35 | 0.018 | 0.018 mg/l |
| 12 Aug 2025, 15:17 | 0.038 | 0.038 mg/l |
| 29 Jul 2025, 10:12 | 0.028 | 0.028 mg/l |
| 3 Jun 2025, 10:24 | 0.032 | 0.032 mg/l |
| 6 May 2025, 09:22 | 0.029 | 0.029 mg/l |
| 1 Apr 2025, 11:19 | 0.015 | 0.015 mg/l |
| 5 Mar 2025, 15:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Feb 2025, 12:48 | 0.019 | 0.019 mg/l |
| 30 Jan 2025, 09:53 | 0.032 | 0.032 mg/l |
| 13 Dec 2024, 12:54 | <0.01 | below 0.01 mg/l (not detected above this) |
| 25 Nov 2024, 15:36 | 0.023 | 0.023 mg/l |
| 14 Oct 2024, 10:02 | 0.37 | 0.37 mg/l |
| 27 Sep 2024, 10:26 | 0.11 | 0.11 mg/l |
| 27 Sep 2024, 10:25 | 0.11 | 0.11 mg/l |
| 23 Sep 2024, 15:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Jul 2024, 15:23 | 0.028 | 0.028 mg/l |
| 12 Mar 2024, 14:12 | 0.017 | 0.017 mg/l |
| 28 Nov 2023, 15:40 | 0.019 | 0.019 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1076 µS/cm
Sampled 23 Apr 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Apr 2026, 10:06 | 1076 | 1076 µS/cm |
| 12 Mar 2026, 10:07 | 729 | 729 µS/cm |
| 27 Feb 2026, 09:06 | 857 | 857 µS/cm |
| 8 Jan 2026, 15:27 | 941 | 941 µS/cm |
| 9 Dec 2025, 16:28 | 623 | 623 µS/cm |
| 3 Nov 2025, 13:45 | 750 | 750 µS/cm |
| 10 Oct 2025, 11:30 | 1073 | 1073 µS/cm |
| 9 Sep 2025, 10:35 | 1024 | 1024 µS/cm |
| 12 Aug 2025, 15:17 | 1052 | 1052 µS/cm |
| 29 Jul 2025, 10:12 | 1144 | 1144 µS/cm |
| 3 Jun 2025, 10:24 | 997 | 997 µS/cm |
| 6 May 2025, 09:22 | 1068 | 1068 µS/cm |
| 1 Apr 2025, 11:19 | 1027 | 1027 µS/cm |
| 5 Mar 2025, 15:20 | 966 | 966 µS/cm |
| 26 Feb 2025, 12:48 | 705 | 705 µS/cm |
| 30 Jan 2025, 09:53 | 736 | 736 µS/cm |
| 13 Dec 2024, 12:54 | 902 | 902 µS/cm |
| 25 Nov 2024, 15:36 | 573 | 573 µS/cm |
| 14 Oct 2024, 10:02 | 552 | 552 µS/cm |
| 27 Sep 2024, 10:26 | 572 | 572 µS/cm |
| 27 Sep 2024, 10:25 | 583 | 583 µS/cm |
| 23 Sep 2024, 15:02 | 544 | 544 µS/cm |
| 26 Jul 2024, 15:23 | 993 | 993 µS/cm |
| 12 Mar 2024, 14:12 | 534 | 534 µS/cm |
| 7 Feb 2024, 13:05 | 633 | 633 µS/cm |
| 28 Nov 2023, 15:40 | 667 | 667 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 26 | Nov 2023 – Apr 2026 | 89.9% 23 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Nov 2023 – Apr 2026 | 9.16 mg/l 23 Apr 2026 |
| Temperature of Water 0076 | River water | 26 | Nov 2023 – Apr 2026 | 14.4 °C 23 Apr 2026 |
| pH 0061 | River water | 26 | Nov 2023 – Apr 2026 | 6.94 23 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Nov 2023 – Apr 2026 | 2.1 mg/l 23 Apr 2026 |
| Nitrate as N 0117 | River water | 26 | Nov 2023 – Apr 2026 | 19.6 mg/l 23 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Nov 2023 – Apr 2026 | 0.013 mg/l 23 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Nov 2023 – Apr 2026 | 1076 µS/cm 23 Apr 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Nov 2023 – Apr 2026 | 120 mg/l 23 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Nov 2023 – Apr 2026 | 0.00471 mg/l 23 Apr 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jul 2024 – Apr 2026 | below 1 mg/l 23 Apr 2026 |
| Calcium, Dissolved 0239 | River water | 2 | Nov 2023 – Feb 2024 | 50 mg/l 7 Feb 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Nov 2023 – Feb 2024 | 4 mg/l 7 Feb 2024 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Nov 2023 – Feb 2024 | 0.01 µg/l 7 Feb 2024 |
| Lead, Dissolved 0052 | River water | 2 | Nov 2023 – Feb 2024 | below 0.1 µg/l 7 Feb 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Nov 2023 – Feb 2024 | 1.1 µg/l 7 Feb 2024 |
| Nickel, Dissolved 3410 | River water | 2 | Nov 2023 – Feb 2024 | 5.4 µg/l 7 Feb 2024 |
| Nitrite as N 0118 | River water | 26 | Nov 2023 – Apr 2026 | 0.37 mg/l 23 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Nov 2023 – Apr 2026 | 20 mg/l 23 Apr 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.