Downstream Lydd sewage treatment works
EA name: DOWNSTREAM LYDD STW (also listed as “DOWNSTREAM LYDD SEWAGE TREATMENT WORKS”)
Environment Agency sampling point SO-E0001524 · 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
- 22 May 2026, 10:354 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 27 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 602800, 120300As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Unplanned reactive monitoring (pollution incidents) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
76.7%
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 76.7 | 76.7% |
| 14 May 2026, 09:56 | 54 | 54% |
| 30 Apr 2026, 14:07 | 111.3 | 111.3% |
| 16 Apr 2026, 11:03 | 101.9 | 101.9% |
| 6 Oct 2025, 11:24 | 69.8 | 69.8% |
| 11 Sep 2025, 08:39 | 54.5 | 54.5% |
| 3 Sep 2025, 08:50 | 77.8 | 77.8% |
| 10 Jul 2025, 15:42 | 53.9 | 53.9% |
| 11 Jun 2025, 12:49 | 41.2 | 41.2% |
| 14 May 2025, 13:25 | 68.6 | 68.6% |
| 16 Apr 2025, 14:22 | 125.6 | 125.6% |
| 19 Mar 2025, 13:19 | 105.2 | 105.2% |
| 25 Feb 2025, 11:55 | 82.4 | 82.4% |
| 11 Feb 2025, 10:43 | 70.5 | 70.5% |
| 30 Jan 2025, 14:32 | 87.8 | 87.8% |
| 17 Dec 2024, 11:23 | 73.5 | 73.5% |
| 21 Nov 2024, 09:44 | 69.6 | 69.6% |
| 6 Nov 2024, 13:23 | 53.9 | 53.9% |
| 18 Sep 2024, 08:53 | 69.1 | 69.1% |
| 27 Aug 2024, 13:24 | 85.7 | 85.7% |
| 17 Jul 2024, 10:37 | 39.7 | 39.7% |
| 27 Jun 2024, 11:22 | 107.7 | 107.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.32 mg/l
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 7.32 | 7.32 mg/l |
| 14 May 2026, 09:56 | 5.91 | 5.91 mg/l |
| 30 Apr 2026, 14:07 | 10.6 | 10.6 mg/l |
| 16 Apr 2026, 11:03 | 10.5 | 10.5 mg/l |
| 6 Oct 2025, 11:24 | 7.16 | 7.16 mg/l |
| 11 Sep 2025, 08:39 | 5.59 | 5.59 mg/l |
| 3 Sep 2025, 08:50 | 7.42 | 7.42 mg/l |
| 10 Jul 2025, 15:42 | 4.68 | 4.68 mg/l |
| 11 Jun 2025, 12:49 | 3.89 | 3.89 mg/l |
| 14 May 2025, 13:25 | 6.44 | 6.44 mg/l |
| 16 Apr 2025, 14:22 | 12.9 | 12.9 mg/l |
| 19 Mar 2025, 13:19 | 11.4 | 11.4 mg/l |
| 25 Feb 2025, 11:55 | 9.39 | 9.39 mg/l |
| 11 Feb 2025, 10:43 | 8.7 | 8.7 mg/l |
| 30 Jan 2025, 14:32 | 10.4 | 10.4 mg/l |
| 17 Dec 2024, 11:23 | 8.32 | 8.32 mg/l |
| 21 Nov 2024, 09:44 | 8.9 | 8.9 mg/l |
| 6 Nov 2024, 13:23 | 5.66 | 5.66 mg/l |
| 18 Sep 2024, 08:53 | 6.85 | 6.85 mg/l |
| 27 Aug 2024, 13:24 | 7.77 | 7.77 mg/l |
| 17 Jul 2024, 10:37 | 3.8 | 3.8 mg/l |
| 27 Jun 2024, 11:22 | 9.79 | 9.79 mg/l |
Water temperature
code 0076 · °C
17.5 °C
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 17.5 | 17.5 °C |
| 14 May 2026, 09:56 | 11.2 | 11.2 °C |
| 30 Apr 2026, 14:07 | 17.5 | 17.5 °C |
| 16 Apr 2026, 11:03 | 13.8 | 13.8 °C |
| 6 Oct 2025, 11:24 | 14.1 | 14.1 °C |
| 11 Sep 2025, 08:39 | 14.1 | 14.1 °C |
| 3 Sep 2025, 08:50 | 17.5 | 17.5 °C |
| 10 Jul 2025, 15:42 | 22.3 | 22.3 °C |
| 11 Jun 2025, 12:49 | 18 | 18 °C |
| 14 May 2025, 13:25 | 18.3 | 18.3 °C |
| 16 Apr 2025, 14:22 | 14.1 | 14.1 °C |
| 19 Mar 2025, 13:19 | 11.7 | 11.7 °C |
| 25 Feb 2025, 11:55 | 9.5 | 9.5 °C |
| 11 Feb 2025, 10:43 | 6.2 | 6.2 °C |
| 30 Jan 2025, 14:32 | 8 | 8 °C |
| 17 Dec 2024, 11:23 | 9.8 | 9.8 °C |
| 21 Nov 2024, 09:44 | 4.9 | 4.9 °C |
| 6 Nov 2024, 13:23 | 13 | 13 °C |
| 18 Sep 2024, 08:53 | 15.7 | 15.7 °C |
| 27 Aug 2024, 13:24 | 20 | 20 °C |
| 17 Jul 2024, 10:37 | 17.3 | 17.3 °C |
| 27 Jun 2024, 11:22 | 19.9 | 19.9 °C |
pH
code 0061
7.75
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 7.75 | 7.75 |
| 14 May 2026, 09:56 | 7.36 | 7.36 |
| 30 Apr 2026, 14:07 | 8.42 | 8.42 |
| 16 Apr 2026, 11:03 | 7.92 | 7.92 |
| 6 Oct 2025, 11:24 | 7.52 | 7.52 |
| 11 Sep 2025, 08:39 | 7.56 | 7.56 |
| 3 Sep 2025, 08:50 | 7.6 | 7.6 |
| 10 Jul 2025, 15:42 | 7.36 | 7.36 |
| 11 Jun 2025, 12:49 | 7.29 | 7.29 |
| 14 May 2025, 13:25 | 7.28 | 7.28 |
| 16 Apr 2025, 14:22 | 8.84 | 8.84 |
| 19 Mar 2025, 13:19 | 7.95 | 7.95 |
| 25 Feb 2025, 11:55 | 7.49 | 7.49 |
| 11 Feb 2025, 10:43 | 7.43 | 7.43 |
| 30 Jan 2025, 14:32 | 7.6 | 7.6 |
| 17 Dec 2024, 11:23 | 7.4 | 7.4 |
| 21 Nov 2024, 09:44 | 7.42 | 7.42 |
| 6 Nov 2024, 13:23 | 7.17 | 7.17 |
| 18 Sep 2024, 08:53 | 7.58 | 7.58 |
| 27 Aug 2024, 13:24 | 7.96 | 7.96 |
| 17 Jul 2024, 10:37 | 7.01 | 7.01 |
| 27 Jun 2024, 11:22 | 7.93 | 7.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.056 mg/l
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 0.056 | 0.056 mg/l |
| 14 May 2026, 09:56 | 0.099 | 0.099 mg/l |
| 30 Apr 2026, 14:07 | 0.11 | 0.11 mg/l |
| 16 Apr 2026, 11:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2025, 11:24 | 0.65 | 0.65 mg/l |
| 11 Sep 2025, 08:39 | 0.68 | 0.68 mg/l |
| 3 Sep 2025, 08:50 | 0.41 | 0.41 mg/l |
| 10 Jul 2025, 15:42 | 0.24 | 0.24 mg/l |
| 11 Jun 2025, 12:49 | 0.14 | 0.14 mg/l |
| 14 May 2025, 13:25 | 0.1 | 0.1 mg/l |
| 16 Apr 2025, 14:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2025, 13:19 | 0.046 | 0.046 mg/l |
| 25 Feb 2025, 11:55 | 0.076 | 0.076 mg/l |
| 11 Feb 2025, 10:43 | 0.14 | 0.14 mg/l |
| 30 Jan 2025, 14:32 | 0.17 | 0.17 mg/l |
| 17 Dec 2024, 11:23 | 0.24 | 0.24 mg/l |
| 21 Nov 2024, 09:44 | 0.25 | 0.25 mg/l |
| 6 Nov 2024, 13:23 | 0.42 | 0.42 mg/l |
| 18 Sep 2024, 08:53 | 0.22 | 0.22 mg/l |
| 27 Aug 2024, 13:24 | 0.24 | 0.24 mg/l |
| 17 Jul 2024, 10:37 | 0.16 | 0.16 mg/l |
| 27 Jun 2024, 11:22 | 0.073 | 0.073 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.03 mg/l
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 5.03 | 5.03 mg/l |
| 14 May 2026, 09:56 | 2.66 | 2.66 mg/l |
| 30 Apr 2026, 14:07 | 3.71 | 3.71 mg/l |
| 16 Apr 2026, 11:03 | 2.78 | 2.78 mg/l |
| 6 Oct 2025, 11:24 | 5.69 | 5.69 mg/l |
| 11 Sep 2025, 08:39 | 3.14 | 3.14 mg/l |
| 3 Sep 2025, 08:50 | 5.53 | 5.53 mg/l |
| 10 Jul 2025, 15:42 | 2.43 | 2.43 mg/l |
| 11 Jun 2025, 12:49 | 6.22 | 6.22 mg/l |
| 14 May 2025, 13:25 | 3.62 | 3.62 mg/l |
| 16 Apr 2025, 14:22 | 3.08 | 3.08 mg/l |
| 19 Mar 2025, 13:19 | 1.89 | 1.89 mg/l |
| 25 Feb 2025, 11:55 | 4.68 | 4.68 mg/l |
| 11 Feb 2025, 10:43 | 5.08 | 5.08 mg/l |
| 30 Jan 2025, 14:32 | 5.47 | 5.47 mg/l |
| 17 Dec 2024, 11:23 | 4.47 | 4.47 mg/l |
| 21 Nov 2024, 09:44 | 5.46 | 5.46 mg/l |
| 6 Nov 2024, 13:23 | 10.9 | 10.9 mg/l |
| 18 Sep 2024, 08:53 | 5.58 | 5.58 mg/l |
| 27 Aug 2024, 13:24 | 14.6 | 14.6 mg/l |
| 17 Jul 2024, 10:37 | 16.7 | 16.7 mg/l |
| 27 Jun 2024, 11:22 | 11.9 | 11.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.97 mg/l
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 0.97 | 0.97 mg/l |
| 14 May 2026, 09:56 | 0.94 | 0.94 mg/l |
| 30 Apr 2026, 14:07 | 0.82 | 0.82 mg/l |
| 16 Apr 2026, 11:03 | 0.88 | 0.88 mg/l |
| 6 Oct 2025, 11:24 | 1.1 | 1.1 mg/l |
| 11 Sep 2025, 08:39 | 1.3 | 1.3 mg/l |
| 3 Sep 2025, 08:50 | 1.6 | 1.6 mg/l |
| 10 Jul 2025, 15:42 | 2.1 | 2.1 mg/l |
| 11 Jun 2025, 12:49 | 1.4 | 1.4 mg/l |
| 14 May 2025, 13:25 | 0.94 | 0.94 mg/l |
| 16 Apr 2025, 14:22 | 0.63 | 0.63 mg/l |
| 19 Mar 2025, 13:19 | 0.43 | 0.43 mg/l |
| 25 Feb 2025, 11:55 | 0.78 | 0.78 mg/l |
| 11 Feb 2025, 10:43 | 0.75 | 0.75 mg/l |
| 30 Jan 2025, 14:32 | 0.83 | 0.83 mg/l |
| 17 Dec 2024, 11:23 | 0.91 | 0.91 mg/l |
| 21 Nov 2024, 09:44 | 0.97 | 0.97 mg/l |
| 6 Nov 2024, 13:23 | 1.9 | 1.9 mg/l |
| 18 Sep 2024, 08:53 | 1.7 | 1.7 mg/l |
| 27 Aug 2024, 13:24 | 3.2 | 3.2 mg/l |
| 17 Jul 2024, 10:37 | 2.7 | 2.7 mg/l |
| 27 Jun 2024, 11:22 | 2.2 | 2.2 mg/l |
Turbidity
code 6396 · NTU
7.9 NTU
Sampled 6 Nov 2024, 23 months ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Nov 2024, 13:23 | 7.9 | 7.9 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
1167 µS/cm
Sampled 22 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 10:35 | 1167 | 1167 µS/cm |
| 14 May 2026, 09:56 | 1163 | 1163 µS/cm |
| 30 Apr 2026, 14:07 | 912 | 912 µS/cm |
| 16 Apr 2026, 11:03 | 960 | 960 µS/cm |
| 6 Oct 2025, 11:24 | 1169 | 1169 µS/cm |
| 11 Sep 2025, 08:39 | 1174 | 1174 µS/cm |
| 3 Sep 2025, 08:50 | 1151 | 1151 µS/cm |
| 10 Jul 2025, 15:42 | 1125 | 1125 µS/cm |
| 11 Jun 2025, 12:49 | 970 | 970 µS/cm |
| 14 May 2025, 13:25 | 970 | 970 µS/cm |
| 16 Apr 2025, 14:22 | 1114 | 1114 µS/cm |
| 19 Mar 2025, 13:19 | 986 | 986 µS/cm |
| 25 Feb 2025, 11:55 | 823 | 823 µS/cm |
| 11 Feb 2025, 10:43 | 903 | 903 µS/cm |
| 30 Jan 2025, 14:32 | 836 | 836 µS/cm |
| 17 Dec 2024, 11:23 | 822 | 822 µS/cm |
| 21 Nov 2024, 09:44 | 914 | 914 µS/cm |
| 6 Nov 2024, 13:23 | 727 | 727 µS/cm |
| 18 Sep 2024, 08:53 | 644 | 644 µS/cm |
| 27 Aug 2024, 13:24 | 1076 | 1076 µS/cm |
| 17 Jul 2024, 10:37 | 704 | 704 µS/cm |
| 27 Jun 2024, 11:22 | 690 | 690 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jun 2024 – May 2026 | 76.7% 22 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – May 2026 | 7.32 mg/l 22 May 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – May 2026 | 17.5 °C 22 May 2026 |
| pH 0061 | River water | 22 | Jun 2024 – May 2026 | 7.75 22 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – May 2026 | 0.056 mg/l 22 May 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – May 2026 | 5.03 mg/l 22 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – May 2026 | 0.97 mg/l 22 May 2026 |
| Turbidity 6396 | River water | 1 | Nov 2024 – Nov 2024 | 7.9 NTU 6 Nov 2024 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – May 2026 | 1167 µS/cm 22 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – May 2026 | 150 mg/l 22 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – May 2026 | 0.00101 mg/l 22 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1.2 mg/l 22 May 2026 |
| Chloride 0172 | River water | 1 | Nov 2024 – Nov 2024 | 80 mg/l 6 Nov 2024 |
| National Grid Reference : Whole : Field report 7434 | River water | 1 | Nov 2024 – Nov 2024 | 1 unitless value 6 Nov 2024 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – May 2026 | 0.074 mg/l 22 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – May 2026 | 5.1 mg/l 22 May 2026 |
| Salinity : In Situ 7608 | River water | 2 | Nov 2024 – Feb 2025 | 0.45 parts per thousand 11 Feb 2025 |
| Visible oil or grease, significant trace: Present/Not found (1/0) 0664 | River water | 1 | Feb 2025 – Feb 2025 | Not found 11 Feb 2025 |
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.