Black Ditch Lyminster Bridge
EA name: BLACK DITCH LYMINSTER BRIDGE (also listed as “RIVER ARUN TRIBUTARY BLACK DITCH AT LYMINSTER BRIDGE”)
Environment Agency sampling point SO-F0002839 · 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
- 14 May 2026, 15:215 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
- 24 since 24 Jun 2024 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 502500, 104400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- tributary of Black Ditch
- River, by the map
- Black DitchPlaced on the river its name gives, 10 m from the line.
- Next gauge downstream
- Littlehampton On the River Arun · 6.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (14 samples)
Environmental monitoring statutory (EU directives) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
94.8%
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 94.8 | 94.8% |
| 15 Apr 2026, 11:05 | 110.7 | 110.7% |
| 2 Mar 2026, 10:52 | 66.8 | 66.8% |
| 9 Feb 2026, 10:17 | 54.5 | 54.5% |
| 3 Dec 2025, 12:34 | 58.6 | 58.6% |
| 6 Nov 2025, 11:26 | 46.5 | 46.5% |
| 9 Oct 2025, 09:37 | 47.2 | 47.2% |
| 5 Sep 2025, 12:21 | 50.1 | 50.1% |
| 6 Aug 2025, 10:13 | 81.2 | 81.2% |
| 11 Jul 2025, 07:50 | 68.6 | 68.6% |
| 24 Jun 2025, 11:25 | 117.7 | 117.7% |
| 8 May 2025, 10:10 | 96.8 | 96.8% |
| 8 Apr 2025, 09:36 | 92.5 | 92.5% |
| 5 Mar 2025, 08:59 | 81.6 | 81.6% |
| 17 Feb 2025, 09:46 | 88.2 | 88.2% |
| 28 Jan 2025, 10:07 | 74.7 | 74.7% |
| 9 Dec 2024, 11:37 | 70.5 | 70.5% |
| 19 Nov 2024, 10:17 | 68.5 | 68.5% |
| 22 Oct 2024, 15:58 | 74 | 74% |
| 26 Sep 2024, 13:38 | 74.3 | 74.3% |
| 30 Aug 2024, 08:58 | 74.7 | 74.7% |
| 29 Aug 2024, 14:22 | 95.9 | 95.9% |
| 24 Jun 2024, 11:10 | 89.4 | 89.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.96 mg/l
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 9.96 | 9.96 mg/l |
| 15 Apr 2026, 11:05 | 11.8 | 11.8 mg/l |
| 2 Mar 2026, 10:52 | 7.45 | 7.45 mg/l |
| 9 Feb 2026, 10:17 | 6.37 | 6.37 mg/l |
| 3 Dec 2025, 12:34 | 6.68 | 6.68 mg/l |
| 6 Nov 2025, 11:26 | 4.84 | 4.84 mg/l |
| 9 Oct 2025, 09:37 | 5.05 | 5.05 mg/l |
| 5 Sep 2025, 12:21 | 4.97 | 4.97 mg/l |
| 6 Aug 2025, 10:13 | 8.15 | 8.15 mg/l |
| 11 Jul 2025, 07:50 | 6.44 | 6.44 mg/l |
| 24 Jun 2025, 11:25 | 10.9 | 10.9 mg/l |
| 8 May 2025, 10:10 | 10.4 | 10.4 mg/l |
| 8 Apr 2025, 09:36 | 10.7 | 10.7 mg/l |
| 5 Mar 2025, 08:59 | 9.94 | 9.94 mg/l |
| 17 Feb 2025, 09:46 | 10.7 | 10.7 mg/l |
| 28 Jan 2025, 10:07 | 8.77 | 8.77 mg/l |
| 9 Dec 2024, 11:37 | 8.19 | 8.19 mg/l |
| 19 Nov 2024, 10:17 | 7.63 | 7.63 mg/l |
| 22 Oct 2024, 15:58 | 7.67 | 7.67 mg/l |
| 26 Sep 2024, 13:38 | 7.47 | 7.47 mg/l |
| 30 Aug 2024, 08:58 | 7.65 | 7.65 mg/l |
| 29 Aug 2024, 14:22 | 9.19 | 9.19 mg/l |
| 24 Jun 2024, 11:10 | 8.84 | 8.84 mg/l |
Water temperature
code 0076 · °C
13 °C
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 13 | 13 °C |
| 15 Apr 2026, 11:05 | 12.4 | 12.4 °C |
| 2 Mar 2026, 10:52 | 10.4 | 10.4 °C |
| 9 Feb 2026, 10:17 | 8.5 | 8.5 °C |
| 3 Dec 2025, 12:34 | 9.5 | 9.5 °C |
| 6 Nov 2025, 11:26 | 13.4 | 13.4 °C |
| 9 Oct 2025, 09:37 | 12.2 | 12.2 °C |
| 5 Sep 2025, 12:21 | 15.6 | 15.6 °C |
| 6 Aug 2025, 10:13 | 15.1 | 15.1 °C |
| 11 Jul 2025, 07:50 | 18.3 | 18.3 °C |
| 24 Jun 2025, 11:25 | 18.8 | 18.8 °C |
| 8 May 2025, 10:10 | 11.9 | 11.9 °C |
| 8 Apr 2025, 09:36 | 8.8 | 8.8 °C |
| 5 Mar 2025, 08:59 | 6.8 | 6.8 °C |
| 17 Feb 2025, 09:46 | 7 | 7 °C |
| 28 Jan 2025, 10:07 | 8.3 | 8.3 °C |
| 9 Dec 2024, 11:37 | 8.7 | 8.7 °C |
| 19 Nov 2024, 10:17 | 10.5 | 10.5 °C |
| 22 Oct 2024, 15:58 | 13.6 | 13.6 °C |
| 26 Sep 2024, 13:38 | 15 | 15 °C |
| 30 Aug 2024, 08:58 | 14.2 | 14.2 °C |
| 29 Aug 2024, 14:22 | 17.3 | 17.3 °C |
| 24 Jun 2024, 11:10 | 15.8 | 15.8 °C |
pH
code 0061
7.53
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 7.53 | 7.53 |
| 15 Apr 2026, 11:05 | 7.63 | 7.63 |
| 2 Mar 2026, 10:52 | 7.38 | 7.38 |
| 9 Feb 2026, 10:17 | 7.44 | 7.44 |
| 3 Dec 2025, 12:34 | 7.37 | 7.37 |
| 6 Nov 2025, 11:26 | 7.3 | 7.3 |
| 9 Oct 2025, 09:37 | 7.37 | 7.37 |
| 5 Sep 2025, 12:21 | 7.3 | 7.3 |
| 6 Aug 2025, 10:13 | 7.81 | 7.81 |
| 11 Jul 2025, 07:50 | 8.59 | 8.59 |
| 24 Jun 2025, 11:25 | 8.04 | 8.04 |
| 8 May 2025, 10:10 | 7.73 | 7.73 |
| 8 Apr 2025, 09:36 | 7.88 | 7.88 |
| 5 Mar 2025, 08:59 | 7.7 | 7.7 |
| 17 Feb 2025, 09:46 | 7.62 | 7.62 |
| 28 Jan 2025, 10:07 | 7.47 | 7.47 |
| 9 Dec 2024, 11:37 | 7.78 | 7.78 |
| 19 Nov 2024, 10:17 | 7.62 | 7.62 |
| 22 Oct 2024, 15:58 | 7.5 | 7.5 |
| 26 Sep 2024, 13:38 | 7.82 | 7.82 |
| 30 Aug 2024, 08:58 | 7.6 | 7.6 |
| 29 Aug 2024, 14:22 | 7.61 | 7.61 |
| 24 Jun 2024, 11:10 | 7.79 | 7.79 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.07 mg/l
Sampled 14 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 0.07 | 0.07 mg/l |
| 15 Apr 2026, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 10:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2026, 10:17 | 0.038 | 0.038 mg/l |
| 6 Jan 2026, 09:26 | 0.054 | 0.054 mg/l |
| 3 Dec 2025, 12:34 | 0.036 | 0.036 mg/l |
| 6 Nov 2025, 11:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2025, 09:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 12:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2025, 10:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jul 2025, 07:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2025, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 May 2025, 10:10 | 0.044 | 0.044 mg/l |
| 8 Apr 2025, 09:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2025, 08:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2025, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2025, 10:07 | 0.043 | 0.043 mg/l |
| 9 Dec 2024, 11:37 | 0.044 | 0.044 mg/l |
| 19 Nov 2024, 10:17 | 0.055 | 0.055 mg/l |
| 22 Oct 2024, 15:58 | 0.066 | 0.066 mg/l |
| 26 Sep 2024, 13:38 | 0.037 | 0.037 mg/l |
| 30 Aug 2024, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Aug 2024, 14:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2024, 11:10 | 0.033 | 0.033 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.47 mg/l
Sampled 14 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 8.47 | 8.47 mg/l |
| 15 Apr 2026, 11:05 | 8.78 | 8.78 mg/l |
| 2 Mar 2026, 10:52 | 6.87 | 6.87 mg/l |
| 9 Feb 2026, 10:17 | 4.77 | 4.77 mg/l |
| 6 Jan 2026, 09:26 | 8.48 | 8.48 mg/l |
| 3 Dec 2025, 12:34 | 6.18 | 6.18 mg/l |
| 6 Nov 2025, 11:26 | 6.57 | 6.57 mg/l |
| 9 Oct 2025, 09:37 | 7.08 | 7.08 mg/l |
| 5 Sep 2025, 12:21 | 3.68 | 3.68 mg/l |
| 6 Aug 2025, 10:13 | 7.97 | 7.97 mg/l |
| 11 Jul 2025, 07:50 | 8.25 | 8.25 mg/l |
| 24 Jun 2025, 11:25 | 8.55 | 8.55 mg/l |
| 8 May 2025, 10:10 | 8.67 | 8.67 mg/l |
| 8 Apr 2025, 09:36 | 8.89 | 8.89 mg/l |
| 5 Mar 2025, 08:59 | 8.09 | 8.09 mg/l |
| 17 Feb 2025, 09:46 | 8.79 | 8.79 mg/l |
| 28 Jan 2025, 10:07 | 5.68 | 5.68 mg/l |
| 9 Dec 2024, 11:37 | 6.27 | 6.27 mg/l |
| 19 Nov 2024, 10:17 | 6.87 | 6.87 mg/l |
| 22 Oct 2024, 15:58 | 4.54 | 4.54 mg/l |
| 26 Sep 2024, 13:38 | 6.45 | 6.45 mg/l |
| 30 Aug 2024, 08:58 | 7.87 | 7.87 mg/l |
| 29 Aug 2024, 14:22 | 7.97 | 7.97 mg/l |
| 24 Jun 2024, 11:10 | 8.07 | 8.07 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.043 mg/l
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 0.043 | 0.043 mg/l |
| 15 Apr 2026, 11:05 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Mar 2026, 10:52 | 0.058 | 0.058 mg/l |
| 9 Feb 2026, 10:17 | 0.085 | 0.085 mg/l |
| 6 Jan 2026, 09:26 | 0.051 | 0.051 mg/l |
| 3 Dec 2025, 12:34 | 0.13 | 0.13 mg/l |
| 6 Nov 2025, 11:26 | 0.067 | 0.067 mg/l |
| 9 Oct 2025, 09:37 | 0.039 | 0.039 mg/l |
| 5 Sep 2025, 12:21 | 0.11 | 0.11 mg/l |
| 6 Aug 2025, 10:13 | 0.024 | 0.024 mg/l |
| 11 Jul 2025, 07:50 | 0.042 | 0.042 mg/l |
| 24 Jun 2025, 11:25 | 0.021 | 0.021 mg/l |
| 8 May 2025, 10:10 | 0.018 | 0.018 mg/l |
| 8 Apr 2025, 09:36 | 0.021 | 0.021 mg/l |
| 5 Mar 2025, 08:59 | 0.026 | 0.026 mg/l |
| 17 Feb 2025, 09:46 | 0.032 | 0.032 mg/l |
| 28 Jan 2025, 10:07 | 0.086 | 0.086 mg/l |
| 19 Nov 2024, 10:17 | 0.076 | 0.076 mg/l |
| 22 Oct 2024, 15:58 | 0.13 | 0.13 mg/l |
| 26 Sep 2024, 13:38 | 0.054 | 0.054 mg/l |
| 30 Aug 2024, 08:58 | 0.023 | 0.023 mg/l |
| 29 Aug 2024, 14:22 | 0.026 | 0.026 mg/l |
| 24 Jun 2024, 11:10 | 0.035 | 0.035 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
768 µS/cm
Sampled 14 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 May 2026, 15:21 | 768 | 768 µS/cm |
| 15 Apr 2026, 11:05 | 748 | 748 µS/cm |
| 2 Mar 2026, 10:52 | 724 | 724 µS/cm |
| 9 Feb 2026, 10:17 | 634 | 634 µS/cm |
| 3 Dec 2025, 12:34 | 810 | 810 µS/cm |
| 6 Nov 2025, 11:26 | 814 | 814 µS/cm |
| 9 Oct 2025, 09:37 | 792 | 792 µS/cm |
| 5 Sep 2025, 12:21 | 623 | 623 µS/cm |
| 6 Aug 2025, 10:13 | 759 | 759 µS/cm |
| 11 Jul 2025, 07:50 | 781 | 781 µS/cm |
| 24 Jun 2025, 11:25 | 758 | 758 µS/cm |
| 8 May 2025, 10:10 | 779 | 779 µS/cm |
| 8 Apr 2025, 09:36 | 755 | 755 µS/cm |
| 5 Mar 2025, 08:59 | 840 | 840 µS/cm |
| 17 Feb 2025, 09:46 | 776 | 776 µS/cm |
| 28 Jan 2025, 10:07 | 683 | 683 µS/cm |
| 9 Dec 2024, 11:37 | 710 | 710 µS/cm |
| 19 Nov 2024, 10:17 | 785 | 785 µS/cm |
| 22 Oct 2024, 15:58 | 675 | 675 µS/cm |
| 26 Sep 2024, 13:38 | 903 | 903 µS/cm |
| 30 Aug 2024, 08:58 | 789 | 789 µS/cm |
| 29 Aug 2024, 14:22 | 776 | 776 µS/cm |
| 24 Jun 2024, 11:10 | 823 | 823 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 | 23 | Jun 2024 – May 2026 | 94.8% 14 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – May 2026 | 9.96 mg/l 14 May 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – May 2026 | 13 °C 14 May 2026 |
| pH 0061 | River water | 23 | Jun 2024 – May 2026 | 7.53 14 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | 0.07 mg/l 14 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 8.47 mg/l 14 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – May 2026 | 0.043 mg/l 14 May 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – May 2026 | 768 µS/cm 14 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 270 mg/l 14 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | 0.00055 mg/l 14 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 1.1 mg/l 14 May 2026 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.035 mg/l 14 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 8.5 mg/l 14 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.