Dunwich River Dunwich Bridge
EA name: DUNWICH RIVER DUNWICH BRIDGE
Environment Agency sampling point AN-DUN010 · 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
- 2 Sep 2026, 08:4329 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 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 647300, 270700As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Dunwich
- River, by the map
- Dunwich RiverPlaced on the river its name gives, 33 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Planned investigation (local monitoring) (35 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
58.1%
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 58.1 | 58.1% |
| 4 Jun 2026, 10:36 | 55.5 | 55.5% |
| 21 May 2026, 11:13 | 78.2 | 78.2% |
| 30 Apr 2026, 09:40 | 73.9 | 73.9% |
| 26 Mar 2026, 10:13 | 73.2 | 73.2% |
| 25 Feb 2026, 10:59 | 70.7 | 70.7% |
| 28 Jan 2026, 10:07 | 73 | 73% |
| 2 Dec 2025, 11:30 | 44.6 | 44.6% |
| 11 Nov 2025, 11:46 | 24.7 | 24.7% |
| 9 Oct 2025, 09:40 | 71.4 | 71.4% |
| 3 Sep 2025, 12:40 | 48.9 | 48.9% |
| 13 Aug 2025, 09:14 | 64.8 | 64.8% |
| 11 Jul 2025, 11:27 | 73.3 | 73.3% |
| 24 Jun 2025, 12:28 | 64 | 64% |
| 29 May 2025, 13:52 | 88.2 | 88.2% |
| 22 Apr 2025, 13:33 | 109.8 | 109.8% |
| 6 Mar 2025, 09:44 | 81.1 | 81.1% |
| 20 Feb 2025, 12:19 | 82.3 | 82.3% |
| 28 Jan 2025, 11:45 | 81.8 | 81.8% |
| 29 Nov 2024, 12:08 | 69.4 | 69.4% |
| 2 Oct 2024, 10:55 | 51.2 | 51.2% |
| 10 Sep 2024, 10:34 | 67.9 | 67.9% |
| 14 Aug 2024, 13:28 | 74.9 | 74.9% |
| 23 Jul 2024, 10:29 | 77.8 | 77.8% |
| 25 Jun 2024, 09:17 | 75.6 | 75.6% |
| 20 May 2024, 09:45 | 76.3 | 76.3% |
| 12 Apr 2024, 10:08 | 84.7 | 84.7% |
| 12 Mar 2024, 10:51 | 77.1 | 77.1% |
| 2 Feb 2024, 08:52 | 86.7 | 86.7% |
| 11 Jan 2024, 09:19 | 83.1 | 83.1% |
| 11 Dec 2023, 11:04 | 78.7 | 78.7% |
| 3 Nov 2023, 10:35 | 66 | 66% |
| 3 Oct 2023, 10:14 | 49.3 | 49.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.66 mg/l
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 5.66 | 5.66 mg/l |
| 4 Jun 2026, 10:36 | 5.81 | 5.81 mg/l |
| 21 May 2026, 11:13 | 8.04 | 8.04 mg/l |
| 30 Apr 2026, 09:40 | 8.11 | 8.11 mg/l |
| 26 Mar 2026, 10:13 | 8.96 | 8.96 mg/l |
| 25 Feb 2026, 10:59 | 7.95 | 7.95 mg/l |
| 28 Jan 2026, 10:07 | 9.36 | 9.36 mg/l |
| 2 Dec 2025, 11:30 | 5.13 | 5.13 mg/l |
| 11 Nov 2025, 11:46 | 2.72 | 2.72 mg/l |
| 9 Oct 2025, 09:40 | 7.99 | 7.99 mg/l |
| 3 Sep 2025, 12:40 | 4.87 | 4.87 mg/l |
| 13 Aug 2025, 09:14 | 6.65 | 6.65 mg/l |
| 11 Jul 2025, 11:27 | 7.37 | 7.37 mg/l |
| 24 Jun 2025, 12:28 | 6.59 | 6.59 mg/l |
| 29 May 2025, 13:52 | 8.66 | 8.66 mg/l |
| 22 Apr 2025, 13:33 | 11.4 | 11.4 mg/l |
| 6 Mar 2025, 09:44 | 10.1 | 10.1 mg/l |
| 20 Feb 2025, 12:19 | 9.45 | 9.45 mg/l |
| 28 Jan 2025, 11:45 | 9.87 | 9.87 mg/l |
| 29 Nov 2024, 12:08 | 8.54 | 8.54 mg/l |
| 2 Oct 2024, 10:55 | 5.39 | 5.39 mg/l |
| 10 Sep 2024, 10:34 | 7.23 | 7.23 mg/l |
| 14 Aug 2024, 13:28 | 7.33 | 7.33 mg/l |
| 23 Jul 2024, 10:29 | 7.76 | 7.76 mg/l |
| 25 Jun 2024, 09:17 | 7.91 | 7.91 mg/l |
| 20 May 2024, 09:45 | 8.2 | 8.2 mg/l |
| 12 Apr 2024, 10:08 | 9.15 | 9.15 mg/l |
| 12 Mar 2024, 10:51 | 8.96 | 8.96 mg/l |
| 2 Feb 2024, 08:52 | 10.7 | 10.7 mg/l |
| 11 Jan 2024, 09:19 | 10.6 | 10.6 mg/l |
| 11 Dec 2023, 11:04 | 9.26 | 9.26 mg/l |
| 3 Nov 2023, 10:35 | 7.4 | 7.4 mg/l |
| 3 Oct 2023, 10:14 | 5.15 | 5.15 mg/l |
Water temperature
code 0076 · °C
16.5 °C
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 16.5 | 16.5 °C |
| 4 Jun 2026, 10:36 | 13.2 | 13.2 °C |
| 21 May 2026, 11:13 | 14 | 14 °C |
| 30 Apr 2026, 09:40 | 11.1 | 11.1 °C |
| 26 Mar 2026, 10:13 | 6.6 | 6.6 °C |
| 25 Feb 2026, 10:59 | 10.1 | 10.1 °C |
| 28 Jan 2026, 10:07 | 4.8 | 4.8 °C |
| 2 Dec 2025, 11:30 | 9.1 | 9.1 °C |
| 11 Nov 2025, 11:46 | 10.9 | 10.9 °C |
| 9 Oct 2025, 09:40 | 10.3 | 10.3 °C |
| 3 Sep 2025, 12:40 | 15.5 | 15.5 °C |
| 13 Aug 2025, 09:14 | 14.1 | 14.1 °C |
| 11 Jul 2025, 11:27 | 15 | 15 °C |
| 24 Jun 2025, 12:28 | 13.9 | 13.9 °C |
| 29 May 2025, 13:52 | 16.1 | 16.1 °C |
| 22 Apr 2025, 13:33 | 13.4 | 13.4 °C |
| 6 Mar 2025, 09:44 | 5.8 | 5.8 °C |
| 20 Feb 2025, 12:19 | 9.2 | 9.2 °C |
| 28 Jan 2025, 11:45 | 7.2 | 7.2 °C |
| 29 Nov 2024, 12:08 | 6.4 | 6.4 °C |
| 2 Oct 2024, 10:55 | 12.9 | 12.9 °C |
| 10 Sep 2024, 10:34 | 12.4 | 12.4 °C |
| 14 Aug 2024, 13:28 | 16.3 | 16.3 °C |
| 23 Jul 2024, 10:29 | 15.4 | 15.4 °C |
| 25 Jun 2024, 09:17 | 13.2 | 13.2 °C |
| 20 May 2024, 09:45 | 12 | 12 °C |
| 12 Apr 2024, 10:08 | 11.8 | 11.8 °C |
| 12 Mar 2024, 10:51 | 8.7 | 8.7 °C |
| 2 Feb 2024, 08:52 | 6.3 | 6.3 °C |
| 11 Jan 2024, 09:19 | 5 | 5 °C |
| 11 Dec 2023, 11:04 | 8.2 | 8.2 °C |
| 3 Nov 2023, 10:35 | 10.2 | 10.2 °C |
| 3 Oct 2023, 10:14 | 13.3 | 13.3 °C |
pH
code 0061
7.56
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 7.56 | 7.56 |
| 4 Jun 2026, 10:36 | 7.4 | 7.4 |
| 21 May 2026, 11:13 | 7.56 | 7.56 |
| 30 Apr 2026, 09:40 | 7.56 | 7.56 |
| 26 Mar 2026, 10:13 | 7.66 | 7.66 |
| 25 Feb 2026, 10:59 | 7.54 | 7.54 |
| 28 Jan 2026, 10:07 | 7.58 | 7.58 |
| 2 Dec 2025, 11:30 | 7.35 | 7.35 |
| 11 Nov 2025, 11:46 | 7.64 | 7.64 |
| 9 Oct 2025, 09:40 | 7.55 | 7.55 |
| 3 Sep 2025, 12:40 | 7.36 | 7.36 |
| 13 Aug 2025, 09:14 | 7.53 | 7.53 |
| 11 Jul 2025, 11:27 | 7.71 | 7.71 |
| 24 Jun 2025, 12:28 | 7.5 | 7.5 |
| 29 May 2025, 13:52 | 8.01 | 8.01 |
| 22 Apr 2025, 13:33 | 7.8 | 7.8 |
| 6 Mar 2025, 09:44 | 7.65 | 7.65 |
| 20 Feb 2025, 12:19 | 7.63 | 7.63 |
| 28 Jan 2025, 11:45 | 7.55 | 7.55 |
| 29 Nov 2024, 12:08 | 7.4 | 7.4 |
| 2 Oct 2024, 10:55 | 6.94 | 6.94 |
| 10 Sep 2024, 10:34 | 7.58 | 7.58 |
| 14 Aug 2024, 13:28 | 7.54 | 7.54 |
| 23 Jul 2024, 10:29 | 8.19 | 8.19 |
| 25 Jun 2024, 09:17 | 7.62 | 7.62 |
| 20 May 2024, 09:45 | 7.84 | 7.84 |
| 12 Apr 2024, 10:08 | 7.63 | 7.63 |
| 12 Mar 2024, 10:51 | 7.6 | 7.6 |
| 2 Feb 2024, 08:52 | 7.6 | 7.6 |
| 11 Jan 2024, 09:19 | 7.71 | 7.71 |
| 11 Dec 2023, 11:04 | 7.6 | 7.6 |
| 3 Nov 2023, 10:35 | 7.41 | 7.41 |
| 3 Oct 2023, 10:14 | 7.37 | 7.37 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.039 mg/l
Sampled 5 Aug 2026, 57 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 0.039 | 0.039 mg/l |
| 4 Jun 2026, 10:36 | 0.1 | 0.1 mg/l |
| 21 May 2026, 11:13 | 0.063 | 0.063 mg/l |
| 30 Apr 2026, 09:40 | 0.061 | 0.061 mg/l |
| 26 Mar 2026, 10:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Feb 2026, 10:59 | 0.069 | 0.069 mg/l |
| 28 Jan 2026, 10:07 | 0.27 | 0.27 mg/l |
| 2 Dec 2025, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Nov 2025, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2025, 09:40 | 0.033 | 0.033 mg/l |
| 3 Sep 2025, 12:40 | 0.053 | 0.053 mg/l |
| 13 Aug 2025, 09:14 | 0.052 | 0.052 mg/l |
| 22 Apr 2025, 13:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 09:44 | 0.057 | 0.057 mg/l |
| 20 Feb 2025, 12:19 | 0.071 | 0.071 mg/l |
| 28 Jan 2025, 11:45 | 0.069 | 0.069 mg/l |
| 20 Dec 2024, 12:01 | 0.08 | 0.08 mg/l |
| 29 Nov 2024, 12:08 | 0.07 | 0.07 mg/l |
| 2 Oct 2024, 10:55 | 0.27 | 0.27 mg/l |
| 10 Sep 2024, 10:34 | 0.053 | 0.053 mg/l |
| 14 Aug 2024, 13:28 | 0.055 | 0.055 mg/l |
| 23 Jul 2024, 10:29 | 0.066 | 0.066 mg/l |
| 25 Jun 2024, 09:17 | 0.076 | 0.076 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.59 mg/l
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 1.59 | 1.59 mg/l |
| 4 Jun 2026, 10:36 | 1.48 | 1.48 mg/l |
| 21 May 2026, 11:13 | 1.59 | 1.59 mg/l |
| 30 Apr 2026, 09:40 | 1.59 | 1.59 mg/l |
| 26 Mar 2026, 10:13 | 1.89 | 1.89 mg/l |
| 25 Feb 2026, 10:59 | 2.18 | 2.18 mg/l |
| 28 Jan 2026, 10:07 | 2.78 | 2.78 mg/l |
| 2 Dec 2025, 11:30 | 2.18 | 2.18 mg/l |
| 11 Nov 2025, 11:46 | 1.27 | 1.27 mg/l |
| 9 Oct 2025, 09:40 | 1.69 | 1.69 mg/l |
| 3 Sep 2025, 12:40 | 1.78 | 1.78 mg/l |
| 13 Aug 2025, 09:14 | 1.79 | 1.79 mg/l |
| 11 Jul 2025, 11:27 | 1.88 | 1.88 mg/l |
| 24 Jun 2025, 12:28 | 1.88 | 1.88 mg/l |
| 29 May 2025, 13:52 | 1.79 | 1.79 mg/l |
| 22 Apr 2025, 13:33 | 1.9 | 1.9 mg/l |
| 6 Mar 2025, 09:44 | 2.79 | 2.79 mg/l |
| 20 Feb 2025, 12:19 | 2.78 | 2.78 mg/l |
| 28 Jan 2025, 11:45 | 9.66 | 9.66 mg/l |
| 20 Dec 2024, 12:01 | 2.68 | 2.68 mg/l |
| 29 Nov 2024, 12:08 | 11 | 11 mg/l |
| 2 Oct 2024, 10:55 | 1.77 | 1.77 mg/l |
| 10 Sep 2024, 10:34 | 2.39 | 2.39 mg/l |
| 14 Aug 2024, 13:28 | 2.29 | 2.29 mg/l |
| 23 Jul 2024, 10:29 | 2.28 | 2.28 mg/l |
| 25 Jun 2024, 09:17 | 2.29 | 2.29 mg/l |
| 20 May 2024, 09:45 | 2.09 | 2.09 mg/l |
| 12 Apr 2024, 10:08 | 2.09 | 2.09 mg/l |
| 12 Mar 2024, 10:51 | 2.09 | 2.09 mg/l |
| 11 Jan 2024, 09:19 | 2.38 | 2.38 mg/l |
| 11 Dec 2023, 11:04 | 2.29 | 2.29 mg/l |
| 3 Nov 2023, 10:35 | 1.98 | 1.98 mg/l |
| 3 Oct 2023, 10:14 | 1.58 | 1.58 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.097 mg/l
Sampled 4 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 10:36 | 0.097 | 0.097 mg/l |
| 21 May 2026, 11:13 | 0.066 | 0.066 mg/l |
| 30 Apr 2026, 09:40 | 0.056 | 0.056 mg/l |
| 26 Mar 2026, 10:13 | 0.059 | 0.059 mg/l |
| 25 Feb 2026, 10:59 | 0.1 | 0.1 mg/l |
| 28 Jan 2026, 10:07 | 0.12 | 0.12 mg/l |
| 2 Dec 2025, 11:30 | 0.066 | 0.066 mg/l |
| 11 Nov 2025, 11:46 | 0.05 | 0.05 mg/l |
| 9 Oct 2025, 09:40 | 0.046 | 0.046 mg/l |
| 3 Sep 2025, 12:40 | 0.095 | 0.095 mg/l |
| 13 Aug 2025, 09:14 | 0.079 | 0.079 mg/l |
| 22 Apr 2025, 13:33 | 0.056 | 0.056 mg/l |
| 6 Mar 2025, 09:44 | 0.057 | 0.057 mg/l |
| 20 Feb 2025, 12:19 | 0.077 | 0.077 mg/l |
| 28 Jan 2025, 11:45 | 0.14 | 0.14 mg/l |
| 20 Dec 2024, 12:01 | 0.082 | 0.082 mg/l |
| 29 Nov 2024, 12:08 | 0.067 | 0.067 mg/l |
| 2 Oct 2024, 10:55 | 0.23 | 0.23 mg/l |
| 10 Sep 2024, 10:34 | 0.073 | 0.073 mg/l |
| 14 Aug 2024, 13:28 | 0.084 | 0.084 mg/l |
| 23 Jul 2024, 10:29 | 0.098 | 0.098 mg/l |
| 25 Jun 2024, 09:17 | 0.089 | 0.089 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
713 µS/cm
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:49 | 713 | 713 µS/cm |
| 4 Jun 2026, 10:36 | 673 | 673 µS/cm |
| 21 May 2026, 11:13 | 680 | 680 µS/cm |
| 30 Apr 2026, 09:40 | 677 | 677 µS/cm |
| 26 Mar 2026, 10:13 | 679 | 679 µS/cm |
| 25 Feb 2026, 10:59 | 641 | 641 µS/cm |
| 28 Jan 2026, 10:07 | 557 | 557 µS/cm |
| 2 Dec 2025, 11:30 | 703 | 703 µS/cm |
| 11 Nov 2025, 11:46 | 732 | 732 µS/cm |
| 9 Oct 2025, 09:40 | 717 | 717 µS/cm |
| 3 Sep 2025, 12:40 | 666 | 666 µS/cm |
| 13 Aug 2025, 09:14 | 706 | 706 µS/cm |
| 11 Jul 2025, 11:27 | 699 | 699 µS/cm |
| 24 Jun 2025, 12:28 | 693 | 693 µS/cm |
| 29 May 2025, 13:52 | 1083 | 1083 µS/cm |
| 22 Apr 2025, 13:33 | 693 | 693 µS/cm |
| 6 Mar 2025, 09:44 | 688 | 688 µS/cm |
| 20 Feb 2025, 12:19 | 695 | 695 µS/cm |
| 28 Jan 2025, 11:45 | 620 | 620 µS/cm |
| 29 Nov 2024, 12:08 | 714 | 714 µS/cm |
| 2 Oct 2024, 10:55 | 704 | 704 µS/cm |
| 10 Sep 2024, 10:34 | 685 | 685 µS/cm |
| 14 Aug 2024, 13:28 | 697 | 697 µS/cm |
| 23 Jul 2024, 10:29 | 1636 | 1636 µS/cm |
| 25 Jun 2024, 09:17 | 684 | 684 µS/cm |
| 20 May 2024, 09:45 | 918 | 918 µS/cm |
| 12 Apr 2024, 10:08 | 668 | 668 µS/cm |
| 12 Mar 2024, 10:51 | 669 | 669 µS/cm |
| 2 Feb 2024, 08:52 | 694 | 694 µS/cm |
| 11 Jan 2024, 09:19 | 656 | 656 µS/cm |
| 11 Dec 2023, 11:04 | 548 | 548 µS/cm |
| 3 Nov 2023, 10:35 | 454 | 454 µS/cm |
| 3 Oct 2023, 10:14 | 695 | 695 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 | 33 | Oct 2023 – Aug 2026 | 58.1% 5 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Aug 2026 | 5.66 mg/l 5 Aug 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Aug 2026 | 16.5 °C 5 Aug 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Aug 2026 | 7.56 5 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – Aug 2026 | 0.039 mg/l 5 Aug 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Aug 2026 | 1.59 mg/l 5 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – Jun 2026 | 0.097 mg/l 4 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Aug 2026 | 713 µS/cm 5 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – Aug 2026 | 250 mg/l 5 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – Aug 2026 | 0.00042 mg/l 5 Aug 2026 |
| Nitrite as N 0118 | River water | 34 | Oct 2023 – Aug 2026 | 0.013 mg/l 5 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 34 | Oct 2023 – Aug 2026 | 1.6 mg/l 5 Aug 2026 |
| No flow /No sample 7668 | River water | 1 | Sep 2026 – Sep 2026 | No flow/discharge at sampling point 2 Sep 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.