Flood Relief Channel Downham Bridge
EA name: FLOOD RELIEF CHANNEL DOWNHAM BRIDGE
Environment Agency sampling point AN-56M10 · 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
- 26 Aug 2026, 09:1236 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 28 since 3 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 560100, 303300As 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 placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Environmental monitoring statutory (EU directives) (23 samples)
Planned investigation (local monitoring) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
123.9%
Sampled 26 Aug 2026, 36 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 123.9 | 123.9% |
| 15 Jul 2026, 11:42 | 97.8 | 97.8% |
| 12 Jun 2026, 13:01 | 116.9 | 116.9% |
| 18 May 2026, 09:35 | 104.3 | 104.3% |
| 20 Apr 2026, 11:38 | 127.9 | 127.9% |
| 25 Mar 2026, 10:11 | 105.4 | 105.4% |
| 5 Feb 2026, 12:27 | 88.8 | 88.8% |
| 19 Jan 2026, 10:30 | 82.3 | 82.3% |
| 5 Dec 2025, 12:32 | 92.2 | 92.2% |
| 3 Nov 2025, 11:15 | 82.3 | 82.3% |
| 21 Oct 2025, 08:18 | 79.2 | 79.2% |
| 7 Apr 2025, 11:50 | 153.1 | 153.1% |
| 11 Mar 2025, 07:56 | 97.3 | 97.3% |
| 5 Feb 2025, 08:16 | 90.6 | 90.6% |
| 7 Jan 2025, 10:30 | 90 | 90% |
| 3 Dec 2024, 12:08 | 85.5 | 85.5% |
| 6 Nov 2024, 11:16 | 77.6 | 77.6% |
| 3 Oct 2024, 13:53 | 81.9 | 81.9% |
| 16 Sep 2024, 11:38 | 100.7 | 100.7% |
| 15 Aug 2024, 10:15 | 112.7 | 112.7% |
| 15 Jul 2024, 15:22 | 97.4 | 97.4% |
| 17 Jun 2024, 12:55 | 102.6 | 102.6% |
| 5 Mar 2024, 15:20 | 91.2 | 91.2% |
| 9 Feb 2024, 14:26 | 88.5 | 88.5% |
| 2 Jan 2024, 12:04 | 90.8 | 90.8% |
| 5 Dec 2023, 15:26 | 83.6 | 83.6% |
| 6 Nov 2023, 15:20 | 77.9 | 77.9% |
| 3 Oct 2023, 15:52 | 77.9 | 77.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 26 Aug 2026, 36 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 11.2 | 11.2 mg/l |
| 15 Jul 2026, 11:42 | 8.32 | 8.32 mg/l |
| 12 Jun 2026, 13:01 | 11 | 11 mg/l |
| 18 May 2026, 09:35 | 10.8 | 10.8 mg/l |
| 20 Apr 2026, 11:38 | 13.3 | 13.3 mg/l |
| 25 Mar 2026, 10:11 | 11.9 | 11.9 mg/l |
| 5 Feb 2026, 12:27 | 11 | 11 mg/l |
| 19 Jan 2026, 10:30 | 10 | 10 mg/l |
| 5 Dec 2025, 12:32 | 11.4 | 11.4 mg/l |
| 3 Nov 2025, 11:15 | 9.01 | 9.01 mg/l |
| 21 Oct 2025, 08:18 | 8.38 | 8.38 mg/l |
| 7 Apr 2025, 11:50 | 16.1 | 16.1 mg/l |
| 11 Mar 2025, 07:56 | 11.5 | 11.5 mg/l |
| 5 Feb 2025, 08:16 | 11.7 | 11.7 mg/l |
| 7 Jan 2025, 10:30 | 11.4 | 11.4 mg/l |
| 3 Dec 2024, 12:08 | 10.4 | 10.4 mg/l |
| 6 Nov 2024, 11:16 | 8.42 | 8.42 mg/l |
| 3 Oct 2024, 13:53 | 8.49 | 8.49 mg/l |
| 16 Sep 2024, 11:38 | 9.77 | 9.77 mg/l |
| 15 Aug 2024, 10:15 | 10 | 10 mg/l |
| 15 Jul 2024, 15:22 | 9.07 | 9.07 mg/l |
| 17 Jun 2024, 12:55 | 9.89 | 9.89 mg/l |
| 5 Mar 2024, 15:20 | 10.9 | 10.9 mg/l |
| 9 Feb 2024, 14:26 | 10.5 | 10.5 mg/l |
| 2 Jan 2024, 12:04 | 10.7 | 10.7 mg/l |
| 5 Dec 2023, 15:26 | 10.7 | 10.7 mg/l |
| 6 Nov 2023, 15:20 | 8.84 | 8.84 mg/l |
| 3 Oct 2023, 15:52 | 7.54 | 7.54 mg/l |
Water temperature
code 0076 · °C
19.6 °C
Sampled 26 Aug 2026, 36 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 19.6 | 19.6 °C |
| 15 Jul 2026, 11:42 | 22.9 | 22.9 °C |
| 12 Jun 2026, 13:01 | 17.9 | 17.9 °C |
| 18 May 2026, 09:35 | 13.7 | 13.7 °C |
| 20 Apr 2026, 11:38 | 13.4 | 13.4 °C |
| 25 Mar 2026, 10:11 | 9.9 | 9.9 °C |
| 5 Feb 2026, 12:27 | 6.2 | 6.2 °C |
| 19 Jan 2026, 10:30 | 6.8 | 6.8 °C |
| 5 Dec 2025, 12:32 | 6.2 | 6.2 °C |
| 3 Nov 2025, 11:15 | 11.2 | 11.2 °C |
| 21 Oct 2025, 08:18 | 12.7 | 12.7 °C |
| 7 Apr 2025, 11:50 | 13 | 13 °C |
| 11 Mar 2025, 07:56 | 8 | 8 °C |
| 5 Feb 2025, 08:16 | 4.6 | 4.6 °C |
| 7 Jan 2025, 10:30 | 5.2 | 5.2 °C |
| 3 Dec 2024, 12:08 | 7 | 7 °C |
| 6 Nov 2024, 11:16 | 11.6 | 11.6 °C |
| 3 Oct 2024, 13:53 | 13.6 | 13.6 °C |
| 16 Sep 2024, 11:38 | 16.7 | 16.7 °C |
| 15 Aug 2024, 10:15 | 21 | 21 °C |
| 15 Jul 2024, 15:22 | 18.7 | 18.7 °C |
| 17 Jun 2024, 12:55 | 17 | 17 °C |
| 5 Mar 2024, 15:20 | 7.6 | 7.6 °C |
| 9 Feb 2024, 14:26 | 8 | 8 °C |
| 2 Jan 2024, 12:04 | 8 | 8 °C |
| 5 Dec 2023, 15:26 | 4.8 | 4.8 °C |
| 6 Nov 2023, 15:20 | 9.7 | 9.7 °C |
| 3 Oct 2023, 15:52 | 16.8 | 16.8 °C |
pH
code 0061
8.36
Sampled 25 Mar 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Mar 2026, 10:11 | 8.36 | 8.36 |
| 5 Feb 2026, 12:27 | 7.89 | 7.89 |
| 19 Jan 2026, 10:30 | 7.63 | 7.63 |
| 5 Dec 2025, 12:32 | 7.83 | 7.83 |
| 3 Nov 2025, 11:15 | 7.85 | 7.85 |
| 21 Oct 2025, 08:18 | 7.68 | 7.68 |
| 7 Apr 2025, 11:50 | 8.47 | 8.47 |
| 11 Mar 2025, 07:56 | 8.06 | 8.06 |
| 5 Feb 2025, 08:16 | 8.09 | 8.09 |
| 7 Jan 2025, 10:30 | 7.94 | 7.94 |
| 3 Dec 2024, 12:08 | 7.88 | 7.88 |
| 6 Nov 2024, 11:16 | 7.9 | 7.9 |
| 3 Oct 2024, 13:53 | 7.62 | 7.62 |
| 16 Sep 2024, 11:38 | 8.03 | 8.03 |
| 15 Aug 2024, 10:15 | 8.04 | 8.04 |
| 15 Jul 2024, 15:22 | 8 | 8 |
| 17 Jun 2024, 12:55 | 8.13 | 8.13 |
| 5 Mar 2024, 15:20 | 7.76 | 7.76 |
| 9 Feb 2024, 14:26 | 7.77 | 7.77 |
| 2 Jan 2024, 12:04 | 7.94 | 7.94 |
| 5 Dec 2023, 15:26 | 7.54 | 7.54 |
| 6 Nov 2023, 15:20 | 7.71 | 7.71 |
| 3 Oct 2023, 15:52 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.035 mg/l
Sampled 26 Aug 2026, 36 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 0.035 | 0.035 mg/l |
| 15 Jul 2026, 11:42 | 0.13 | 0.13 mg/l |
| 12 Jun 2026, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 May 2026, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Apr 2026, 11:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Mar 2026, 10:11 | 0.04 | 0.04 mg/l |
| 5 Feb 2026, 12:27 | 0.18 | 0.18 mg/l |
| 19 Jan 2026, 10:30 | 0.2 | 0.2 mg/l |
| 5 Dec 2025, 12:32 | 0.24 | 0.24 mg/l |
| 3 Nov 2025, 11:15 | 0.18 | 0.18 mg/l |
| 21 Oct 2025, 08:18 | 0.058 | 0.058 mg/l |
| 11 Mar 2025, 07:56 | 0.1 | 0.1 mg/l |
| 5 Feb 2025, 08:16 | 0.13 | 0.13 mg/l |
| 7 Jan 2025, 10:30 | 0.2 | 0.2 mg/l |
| 3 Dec 2024, 12:08 | 0.15 | 0.15 mg/l |
| 6 Nov 2024, 11:16 | 0.033 | 0.033 mg/l |
| 3 Oct 2024, 13:53 | 0.24 | 0.24 mg/l |
| 16 Sep 2024, 11:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2024, 10:15 | 0.03 | 0.03 mg/l |
| 15 Jul 2024, 15:22 | 0.031 | 0.031 mg/l |
| 17 Jun 2024, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2024, 15:20 | 0.13 | 0.13 mg/l |
| 9 Feb 2024, 14:26 | 0.2 | 0.2 mg/l |
| 2 Jan 2024, 12:04 | 0.17 | 0.17 mg/l |
| 5 Dec 2023, 15:26 | 0.3 | 0.3 mg/l |
| 6 Nov 2023, 15:20 | 0.18 | 0.18 mg/l |
| 3 Oct 2023, 15:52 | 0.067 | 0.067 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.399 mg/l
Sampled 26 Aug 2026, 36 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 0.399 | 0.399 mg/l |
| 15 Jul 2026, 11:42 | 2.5 | 2.5 mg/l |
| 12 Jun 2026, 13:01 | 5.81 | 5.81 mg/l |
| 18 May 2026, 09:35 | 7.95 | 7.95 mg/l |
| 20 Apr 2026, 11:38 | 9.17 | 9.17 mg/l |
| 25 Mar 2026, 10:11 | 9.96 | 9.96 mg/l |
| 5 Feb 2026, 12:27 | 12.9 | 12.9 mg/l |
| 19 Jan 2026, 10:30 | 14.9 | 14.9 mg/l |
| 5 Dec 2025, 12:32 | 10.9 | 10.9 mg/l |
| 3 Nov 2025, 11:15 | 4.76 | 4.76 mg/l |
| 21 Oct 2025, 08:18 | 3.77 | 3.77 mg/l |
| 11 Mar 2025, 07:56 | 11 | 11 mg/l |
| 5 Feb 2025, 08:16 | 12 | 12 mg/l |
| 7 Jan 2025, 10:30 | 10.9 | 10.9 mg/l |
| 3 Dec 2024, 12:08 | 10.9 | 10.9 mg/l |
| 6 Nov 2024, 11:16 | 7.96 | 7.96 mg/l |
| 3 Oct 2024, 13:53 | 10.9 | 10.9 mg/l |
| 16 Sep 2024, 11:38 | 6.78 | 6.78 mg/l |
| 15 Aug 2024, 10:15 | 6.96 | 6.96 mg/l |
| 15 Jul 2024, 15:22 | 6.97 | 6.97 mg/l |
| 17 Jun 2024, 12:55 | 7.78 | 7.78 mg/l |
| 5 Mar 2024, 15:20 | 11 | 11 mg/l |
| 2 Jan 2024, 12:04 | 10.9 | 10.9 mg/l |
| 5 Dec 2023, 15:26 | 12.9 | 12.9 mg/l |
| 6 Nov 2023, 15:20 | 10.9 | 10.9 mg/l |
| 3 Oct 2023, 15:52 | 5.06 | 5.06 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.14 mg/l
Sampled 26 Aug 2026, 36 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 0.14 | 0.14 mg/l |
| 15 Jul 2026, 11:42 | 0.091 | 0.091 mg/l |
| 12 Jun 2026, 13:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 May 2026, 09:35 | 0.017 | 0.017 mg/l |
| 20 Apr 2026, 11:38 | 0.014 | 0.014 mg/l |
| 25 Mar 2026, 10:11 | 0.053 | 0.053 mg/l |
| 5 Feb 2026, 12:27 | 0.064 | 0.064 mg/l |
| 19 Jan 2026, 10:30 | 0.057 | 0.057 mg/l |
| 5 Dec 2025, 12:32 | 0.087 | 0.087 mg/l |
| 3 Nov 2025, 11:15 | 0.19 | 0.19 mg/l |
| 21 Oct 2025, 08:18 | 0.16 | 0.16 mg/l |
| 11 Mar 2025, 07:56 | 0.046 | 0.046 mg/l |
| 5 Feb 2025, 08:16 | 0.066 | 0.066 mg/l |
| 7 Jan 2025, 10:30 | 0.093 | 0.093 mg/l |
| 6 Nov 2024, 11:16 | 0.097 | 0.097 mg/l |
| 3 Oct 2024, 13:53 | 0.13 | 0.13 mg/l |
| 16 Sep 2024, 11:38 | 0.062 | 0.062 mg/l |
| 15 Aug 2024, 10:15 | 0.027 | 0.027 mg/l |
| 15 Jul 2024, 15:22 | 0.054 | 0.054 mg/l |
| 17 Jun 2024, 12:55 | 0.048 | 0.048 mg/l |
| 5 Mar 2024, 15:20 | 0.045 | 0.045 mg/l |
| 2 Jan 2024, 12:04 | 0.049 | 0.049 mg/l |
| 5 Dec 2023, 15:26 | 0.039 | 0.039 mg/l |
| 6 Nov 2023, 15:20 | 0.067 | 0.067 mg/l |
| 3 Oct 2023, 15:52 | 0.17 | 0.17 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
3845 µS/cm
Sampled 26 Aug 2026, 36 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Aug 2026, 09:12 | 3845 | 3845 µS/cm |
| 15 Jul 2026, 11:42 | 3185 | 3185 µS/cm |
| 12 Jun 2026, 13:01 | 1589 | 1589 µS/cm |
| 18 May 2026, 09:35 | 827 | 827 µS/cm |
| 20 Apr 2026, 11:38 | 873 | 873 µS/cm |
| 25 Mar 2026, 10:11 | 955 | 955 µS/cm |
| 5 Feb 2026, 12:27 | 1059 | 1059 µS/cm |
| 19 Jan 2026, 10:30 | 1167 | 1167 µS/cm |
| 5 Dec 2025, 12:32 | 1223 | 1223 µS/cm |
| 3 Nov 2025, 11:15 | 3883 | 3883 µS/cm |
| 21 Oct 2025, 08:18 | 4047 | 4047 µS/cm |
| 7 Apr 2025, 11:50 | 840 | 840 µS/cm |
| 11 Mar 2025, 07:56 | 994 | 994 µS/cm |
| 5 Feb 2025, 08:16 | 1018 | 1018 µS/cm |
| 7 Jan 2025, 10:30 | 1060 | 1060 µS/cm |
| 3 Dec 2024, 12:08 | 1047 | 1047 µS/cm |
| 6 Nov 2024, 11:16 | 881 | 881 µS/cm |
| 3 Oct 2024, 13:53 | 1062 | 1062 µS/cm |
| 16 Sep 2024, 11:38 | 790 | 790 µS/cm |
| 15 Aug 2024, 10:15 | 747 | 747 µS/cm |
| 15 Jul 2024, 15:22 | 737 | 737 µS/cm |
| 17 Jun 2024, 12:55 | 788 | 788 µS/cm |
| 5 Mar 2024, 15:20 | 968 | 968 µS/cm |
| 9 Feb 2024, 14:26 | 1022 | 1022 µS/cm |
| 2 Jan 2024, 12:04 | 1070 | 1070 µS/cm |
| 5 Dec 2023, 15:26 | 1256 | 1256 µS/cm |
| 6 Nov 2023, 15:20 | 973 | 973 µS/cm |
| 3 Oct 2023, 15:52 | 898 | 898 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 | 28 | Oct 2023 – Aug 2026 | 123.9% 26 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Oct 2023 – Aug 2026 | 11.2 mg/l 26 Aug 2026 |
| Temperature of Water 0076 | River water | 28 | Oct 2023 – Aug 2026 | 19.6 °C 26 Aug 2026 |
| pH 0061 | River water | 23 | Oct 2023 – Mar 2026 | 8.36 25 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Oct 2023 – Aug 2026 | 0.035 mg/l 26 Aug 2026 |
| Nitrate as N 0117 | River water | 26 | Oct 2023 – Aug 2026 | 0.399 mg/l 26 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Oct 2023 – Aug 2026 | 0.14 mg/l 26 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Oct 2023 – Aug 2026 | 3845 µS/cm 26 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Mar 2026 | 240 mg/l 25 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Mar 2026 | 0.00072 mg/l 25 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 5 | Apr 2026 – Aug 2026 | below 3 mg/l 26 Aug 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 5 | Apr 2026 – Aug 2026 | 31 mg/l 26 Aug 2026 |
| Chloride 0172 | River water | 5 | Apr 2026 – Aug 2026 | 1100 mg/l 26 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 5 | Apr 2026 – Aug 2026 | 70 µg/l 26 Aug 2026 |
| Nitrite as N 0118 | River water | 27 | Oct 2023 – Aug 2026 | 0.031 mg/l 26 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Oct 2023 – Aug 2026 | 0.43 mg/l 26 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 5 | Apr 2026 – Aug 2026 | below 0.2 mg/l 26 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Apr 2026 – Aug 2026 | 12 mg/l 26 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.