River Blackwater Feeringbury Old Mill
EA name: R.BLACKWATER FEERINGBURY OLD MILL
Environment Agency sampling point AN-BL04 · 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
- 15 Sep 2026, 13:3616 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 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 (national agency policy)
- Where
- National Grid 586447, 221180As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blackwater
- River, by the map
- River BlackwaterPlaced on the river its name gives, 20 m from the line.
- Next gauge downstream
- Appleford Bridge On the River Blackwater · 7.9 km along the river
- Nearest gauge upstream
- Stisted On the River Blackwater · 11 km along the river
- Why it was sampled
- Planned investigation (national agency policy) (22 samples)
Planned investigation (local monitoring) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
81.1%
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 81.1 | 81.1% |
| 10 Aug 2026, 15:17 | 82.2 | 82.2% |
| 8 Jul 2026, 13:39 | 93.5 | 93.5% |
| 9 Jun 2026, 09:22 | 88.1 | 88.1% |
| 26 May 2026, 13:43 | 99.1 | 99.1% |
| 8 Apr 2026, 08:46 | 94.2 | 94.2% |
| 6 Mar 2026, 09:16 | 96 | 96% |
| 3 Feb 2026, 13:59 | 95.7 | 95.7% |
| 5 Jan 2026, 14:41 | 95.4 | 95.4% |
| 17 Dec 2025, 13:48 | 93.2 | 93.2% |
| 27 Nov 2025, 14:23 | 95.3 | 95.3% |
| 2 Oct 2025, 15:08 | 85.2 | 85.2% |
| 8 Apr 2025, 14:30 | 140 | 140% |
| 18 Mar 2025, 07:47 | 100.9 | 100.9% |
| 10 Feb 2025, 12:16 | 99.6 | 99.6% |
| 2 Jan 2025, 09:09 | 90.6 | 90.6% |
| 2 Dec 2024, 14:44 | 92.5 | 92.5% |
| 1 Nov 2024, 08:43 | 83 | 83% |
| 1 Oct 2024, 10:36 | 83.4 | 83.4% |
| 9 Sep 2024, 08:43 | 80.6 | 80.6% |
| 1 Aug 2024, 11:03 | 86.7 | 86.7% |
| 1 Jul 2024, 09:25 | 86.5 | 86.5% |
| 14 Jun 2024, 13:18 | 96.6 | 96.6% |
| 1 Mar 2024, 14:24 | 97 | 97% |
| 2 Feb 2024, 13:32 | 96.3 | 96.3% |
| 3 Jan 2024, 10:45 | 90.7 | 90.7% |
| 4 Dec 2023, 09:31 | 91 | 91% |
| 7 Nov 2023, 13:13 | 94.3 | 94.3% |
| 3 Oct 2023, 10:13 | 72.8 | 72.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.63 mg/l
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 7.63 | 7.63 mg/l |
| 10 Aug 2026, 15:17 | 7.58 | 7.58 mg/l |
| 8 Jul 2026, 13:39 | 8.13 | 8.13 mg/l |
| 9 Jun 2026, 09:22 | 8.92 | 8.92 mg/l |
| 26 May 2026, 13:43 | 8.9 | 8.9 mg/l |
| 8 Apr 2026, 08:46 | 10.7 | 10.7 mg/l |
| 6 Mar 2026, 09:16 | 11.3 | 11.3 mg/l |
| 3 Feb 2026, 13:59 | 11.7 | 11.7 mg/l |
| 5 Jan 2026, 14:41 | 13 | 13 mg/l |
| 17 Dec 2025, 13:48 | 11.1 | 11.1 mg/l |
| 27 Nov 2025, 14:23 | 11.3 | 11.3 mg/l |
| 2 Oct 2025, 15:08 | 9 | 9 mg/l |
| 8 Apr 2025, 14:30 | 14.9 | 14.9 mg/l |
| 18 Mar 2025, 07:47 | 12.6 | 12.6 mg/l |
| 10 Feb 2025, 12:16 | 12.6 | 12.6 mg/l |
| 2 Jan 2025, 09:09 | 11 | 11 mg/l |
| 2 Dec 2024, 14:44 | 10.7 | 10.7 mg/l |
| 1 Nov 2024, 08:43 | 8.92 | 8.92 mg/l |
| 1 Oct 2024, 10:36 | 8.81 | 8.81 mg/l |
| 9 Sep 2024, 08:43 | 7.75 | 7.75 mg/l |
| 1 Aug 2024, 11:03 | 8.04 | 8.04 mg/l |
| 1 Jul 2024, 09:25 | 8.34 | 8.34 mg/l |
| 14 Jun 2024, 13:18 | 9.76 | 9.76 mg/l |
| 1 Mar 2024, 14:24 | 11.4 | 11.4 mg/l |
| 2 Feb 2024, 13:32 | 11.4 | 11.4 mg/l |
| 3 Jan 2024, 10:45 | 10.6 | 10.6 mg/l |
| 4 Dec 2023, 09:31 | 11.5 | 11.5 mg/l |
| 7 Nov 2023, 13:13 | 10.5 | 10.5 mg/l |
| 3 Oct 2023, 10:13 | 7.18 | 7.18 mg/l |
Water temperature
code 0076 · °C
18.2 °C
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 18.2 | 18.2 °C |
| 10 Aug 2026, 15:17 | 19.2 | 19.2 °C |
| 8 Jul 2026, 13:39 | 22.2 | 22.2 °C |
| 9 Jun 2026, 09:22 | 14.7 | 14.7 °C |
| 26 May 2026, 13:43 | 20.5 | 20.5 °C |
| 8 Apr 2026, 08:46 | 9.5 | 9.5 °C |
| 6 Mar 2026, 09:16 | 8.3 | 8.3 °C |
| 3 Feb 2026, 13:59 | 6.6 | 6.6 °C |
| 5 Jan 2026, 14:41 | 2.5 | 2.5 °C |
| 17 Dec 2025, 13:48 | 7.6 | 7.6 °C |
| 27 Nov 2025, 14:23 | 8 | 8 °C |
| 2 Oct 2025, 15:08 | 12.8 | 12.8 °C |
| 8 Apr 2025, 14:30 | 12.5 | 12.5 °C |
| 18 Mar 2025, 07:47 | 5.9 | 5.9 °C |
| 10 Feb 2025, 12:16 | 5.4 | 5.4 °C |
| 2 Jan 2025, 09:09 | 6.9 | 6.9 °C |
| 2 Dec 2024, 14:44 | 8.8 | 8.8 °C |
| 1 Nov 2024, 08:43 | 12 | 12 °C |
| 1 Oct 2024, 10:36 | 12.8 | 12.8 °C |
| 9 Sep 2024, 08:43 | 17.1 | 17.1 °C |
| 1 Aug 2024, 11:03 | 18.9 | 18.9 °C |
| 1 Jul 2024, 09:25 | 17 | 17 °C |
| 14 Jun 2024, 13:18 | 14.8 | 14.8 °C |
| 1 Mar 2024, 14:24 | 8.2 | 8.2 °C |
| 2 Feb 2024, 13:32 | 8 | 8 °C |
| 3 Jan 2024, 10:45 | 8.3 | 8.3 °C |
| 4 Dec 2023, 09:31 | 5.2 | 5.2 °C |
| 7 Nov 2023, 13:13 | 10.3 | 10.3 °C |
| 3 Oct 2023, 10:13 | 15.9 | 15.9 °C |
pH
code 0061
7.8
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 7.8 | 7.8 |
| 10 Aug 2026, 15:17 | 7.79 | 7.79 |
| 8 Jul 2026, 13:39 | 7.93 | 7.93 |
| 9 Jun 2026, 09:22 | 7.95 | 7.95 |
| 26 May 2026, 13:43 | 8.36 | 8.36 |
| 8 Apr 2026, 08:46 | 8.17 | 8.17 |
| 6 Mar 2026, 09:16 | 8.07 | 8.07 |
| 3 Feb 2026, 13:59 | 8.13 | 8.13 |
| 5 Jan 2026, 14:41 | 8.21 | 8.21 |
| 17 Dec 2025, 13:48 | 8.1 | 8.1 |
| 27 Nov 2025, 14:23 | 8 | 8 |
| 2 Oct 2025, 15:08 | 7.83 | 7.83 |
| 8 Apr 2025, 14:30 | 8.58 | 8.58 |
| 18 Mar 2025, 07:47 | 8.24 | 8.24 |
| 10 Feb 2025, 12:16 | 8.15 | 8.15 |
| 2 Jan 2025, 09:09 | 8.01 | 8.01 |
| 2 Dec 2024, 14:44 | 7.97 | 7.97 |
| 1 Nov 2024, 08:43 | 7.8 | 7.8 |
| 1 Oct 2024, 10:36 | 7.77 | 7.77 |
| 9 Sep 2024, 08:43 | 7.84 | 7.84 |
| 1 Aug 2024, 11:03 | 7.83 | 7.83 |
| 1 Jul 2024, 09:25 | 7.82 | 7.82 |
| 14 Jun 2024, 13:18 | 8.12 | 8.12 |
| 1 Mar 2024, 14:24 | 8.15 | 8.15 |
| 2 Feb 2024, 13:32 | 8.26 | 8.26 |
| 3 Jan 2024, 10:45 | 7.94 | 7.94 |
| 4 Dec 2023, 09:31 | 7.96 | 7.96 |
| 7 Nov 2023, 13:13 | 8.19 | 8.19 |
| 3 Oct 2023, 10:13 | 8.03 | 8.03 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.032 mg/l
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 0.032 | 0.032 mg/l |
| 10 Aug 2026, 15:17 | 0.086 | 0.086 mg/l |
| 8 Jul 2026, 13:39 | 0.076 | 0.076 mg/l |
| 9 Jun 2026, 09:22 | 0.11 | 0.11 mg/l |
| 26 May 2026, 13:43 | 0.16 | 0.16 mg/l |
| 8 Apr 2026, 08:46 | 0.032 | 0.032 mg/l |
| 6 Mar 2026, 09:16 | 0.068 | 0.068 mg/l |
| 3 Feb 2026, 13:59 | 0.061 | 0.061 mg/l |
| 5 Jan 2026, 14:41 | 0.46 | 0.46 mg/l |
| 17 Dec 2025, 13:48 | 0.04 | 0.04 mg/l |
| 27 Nov 2025, 14:23 | 0.09 | 0.09 mg/l |
| 2 Oct 2025, 15:08 | 0.074 | 0.074 mg/l |
| 8 Apr 2025, 14:30 | 0.24 | 0.24 mg/l |
| 18 Mar 2025, 07:47 | 0.083 | 0.083 mg/l |
| 10 Feb 2025, 12:16 | 0.21 | 0.21 mg/l |
| 2 Jan 2025, 09:09 | 0.14 | 0.14 mg/l |
| 2 Dec 2024, 14:44 | 0.16 | 0.16 mg/l |
| 1 Nov 2024, 08:43 | 0.061 | 0.061 mg/l |
| 1 Oct 2024, 10:36 | 0.078 | 0.078 mg/l |
| 9 Sep 2024, 08:43 | 0.13 | 0.13 mg/l |
| 1 Aug 2024, 11:03 | 0.17 | 0.17 mg/l |
| 1 Jul 2024, 09:25 | 0.14 | 0.14 mg/l |
| 14 Jun 2024, 13:18 | 0.2 | 0.2 mg/l |
| 1 Mar 2024, 14:24 | 0.17 | 0.17 mg/l |
| 2 Feb 2024, 13:32 | 0.14 | 0.14 mg/l |
| 3 Jan 2024, 10:45 | 0.053 | 0.053 mg/l |
| 4 Dec 2023, 09:31 | 0.25 | 0.25 mg/l |
| 7 Nov 2023, 13:13 | 0.054 | 0.054 mg/l |
| 3 Oct 2023, 10:13 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.87 mg/l
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 8.87 | 8.87 mg/l |
| 10 Aug 2026, 15:17 | 10.9 | 10.9 mg/l |
| 8 Jul 2026, 13:39 | 10.9 | 10.9 mg/l |
| 9 Jun 2026, 09:22 | 8.64 | 8.64 mg/l |
| 26 May 2026, 13:43 | 8.61 | 8.61 mg/l |
| 8 Apr 2026, 08:46 | 9.56 | 9.56 mg/l |
| 6 Mar 2026, 09:16 | 10.9 | 10.9 mg/l |
| 3 Feb 2026, 13:59 | 15 | 15 mg/l |
| 5 Jan 2026, 14:41 | 12.8 | 12.8 mg/l |
| 17 Dec 2025, 13:48 | 14.9 | 14.9 mg/l |
| 27 Nov 2025, 14:23 | 13.9 | 13.9 mg/l |
| 2 Oct 2025, 15:08 | 11.9 | 11.9 mg/l |
| 8 Apr 2025, 14:30 | 11.9 | 11.9 mg/l |
| 18 Mar 2025, 07:47 | 10.9 | 10.9 mg/l |
| 10 Feb 2025, 12:16 | 10.9 | 10.9 mg/l |
| 2 Jan 2025, 09:09 | 10.9 | 10.9 mg/l |
| 2 Dec 2024, 14:44 | 11.9 | 11.9 mg/l |
| 1 Nov 2024, 08:43 | 9.95 | 9.95 mg/l |
| 1 Oct 2024, 10:36 | 17.9 | 17.9 mg/l |
| 9 Sep 2024, 08:43 | 11.9 | 11.9 mg/l |
| 1 Aug 2024, 11:03 | 10.9 | 10.9 mg/l |
| 1 Jul 2024, 09:25 | 9.89 | 9.89 mg/l |
| 14 Jun 2024, 13:18 | 11.9 | 11.9 mg/l |
| 1 Mar 2024, 14:24 | 7.55 | 7.55 mg/l |
| 2 Feb 2024, 13:32 | 10.9 | 10.9 mg/l |
| 3 Jan 2024, 10:45 | 7.26 | 7.26 mg/l |
| 4 Dec 2023, 09:31 | 10.9 | 10.9 mg/l |
| 7 Nov 2023, 13:13 | 10.9 | 10.9 mg/l |
| 3 Oct 2023, 10:13 | 10.9 | 10.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.28 mg/l
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 0.28 | 0.28 mg/l |
| 10 Aug 2026, 15:17 | 0.25 | 0.25 mg/l |
| 8 Jul 2026, 13:39 | 0.35 | 0.35 mg/l |
| 9 Jun 2026, 09:22 | 0.34 | 0.34 mg/l |
| 26 May 2026, 13:43 | 0.24 | 0.24 mg/l |
| 8 Apr 2026, 08:46 | 0.11 | 0.11 mg/l |
| 6 Mar 2026, 09:16 | 0.14 | 0.14 mg/l |
| 3 Feb 2026, 13:59 | 0.11 | 0.11 mg/l |
| 5 Jan 2026, 14:41 | 0.17 | 0.17 mg/l |
| 17 Dec 2025, 13:48 | 0.2 | 0.2 mg/l |
| 27 Nov 2025, 14:23 | 0.17 | 0.17 mg/l |
| 2 Oct 2025, 15:08 | 0.33 | 0.33 mg/l |
| 8 Apr 2025, 14:30 | 0.24 | 0.24 mg/l |
| 18 Mar 2025, 07:47 | 0.17 | 0.17 mg/l |
| 10 Feb 2025, 12:16 | 0.19 | 0.19 mg/l |
| 2 Jan 2025, 09:09 | 0.23 | 0.23 mg/l |
| 2 Dec 2024, 14:44 | 0.14 | 0.14 mg/l |
| 1 Nov 2024, 08:43 | 0.26 | 0.26 mg/l |
| 1 Oct 2024, 10:36 | 0.25 | 0.25 mg/l |
| 9 Sep 2024, 08:43 | 0.27 | 0.27 mg/l |
| 1 Aug 2024, 11:03 | 0.32 | 0.32 mg/l |
| 1 Jul 2024, 09:25 | 0.31 | 0.31 mg/l |
| 14 Jun 2024, 13:18 | 0.3 | 0.3 mg/l |
| 1 Mar 2024, 14:24 | 0.15 | 0.15 mg/l |
| 2 Feb 2024, 13:32 | 0.23 | 0.23 mg/l |
| 3 Jan 2024, 10:45 | 0.22 | 0.22 mg/l |
| 4 Dec 2023, 09:31 | 0.16 | 0.16 mg/l |
| 7 Nov 2023, 13:13 | 0.12 | 0.12 mg/l |
| 3 Oct 2023, 10:13 | 0.26 | 0.26 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
952 µS/cm
Sampled 15 Sep 2026, 16 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 13:36 | 952 | 952 µS/cm |
| 10 Aug 2026, 15:17 | 1071 | 1071 µS/cm |
| 8 Jul 2026, 13:39 | 999 | 999 µS/cm |
| 9 Jun 2026, 09:22 | 865 | 865 µS/cm |
| 26 May 2026, 13:43 | 888 | 888 µS/cm |
| 8 Apr 2026, 08:46 | 863 | 863 µS/cm |
| 6 Mar 2026, 09:16 | 838 | 838 µS/cm |
| 3 Feb 2026, 13:59 | 718 | 718 µS/cm |
| 5 Jan 2026, 14:41 | 996 | 996 µS/cm |
| 17 Dec 2025, 13:48 | 866 | 866 µS/cm |
| 27 Nov 2025, 14:23 | 889 | 889 µS/cm |
| 2 Oct 2025, 15:08 | 1044 | 1044 µS/cm |
| 8 Apr 2025, 14:30 | 901 | 901 µS/cm |
| 18 Mar 2025, 07:47 | 885 | 885 µS/cm |
| 10 Feb 2025, 12:16 | 893 | 893 µS/cm |
| 2 Jan 2025, 09:09 | 878 | 878 µS/cm |
| 2 Dec 2024, 14:44 | 824 | 824 µS/cm |
| 1 Nov 2024, 08:43 | 906 | 906 µS/cm |
| 1 Oct 2024, 10:36 | 737 | 737 µS/cm |
| 9 Sep 2024, 08:43 | 914 | 914 µS/cm |
| 1 Aug 2024, 11:03 | 925 | 925 µS/cm |
| 1 Jul 2024, 09:25 | 897 | 897 µS/cm |
| 14 Jun 2024, 13:18 | 907 | 907 µS/cm |
| 1 Mar 2024, 14:24 | 716 | 716 µS/cm |
| 2 Feb 2024, 13:32 | 861 | 861 µS/cm |
| 3 Jan 2024, 10:45 | 540 | 540 µS/cm |
| 4 Dec 2023, 09:31 | 912 | 912 µS/cm |
| 7 Nov 2023, 13:13 | 838 | 838 µS/cm |
| 3 Oct 2023, 10:13 | 1226 | 1226 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – Sep 2026 | 81.1% 15 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Sep 2026 | 7.63 mg/l 15 Sep 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Sep 2026 | 18.2 °C 15 Sep 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Sep 2026 | 7.8 15 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Sep 2026 | 0.032 mg/l 15 Sep 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Sep 2026 | 8.87 mg/l 15 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Sep 2026 | 0.28 mg/l 15 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Sep 2026 | 952 µS/cm 15 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Sep 2026 | 230 mg/l 15 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Sep 2026 | 0.00068 mg/l 15 Sep 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Sep 2026 | 0.032 mg/l 15 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Sep 2026 | 8.9 mg/l 15 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.