River Blackwater Long Bridge Coggeshall
EA name: R.BLACKWATER LONG BRIDGE COGGESHALL
Environment Agency sampling point AN-BL0435 · 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
- 11 Mar 2026, 09:027 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
- 30 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 584920, 222370As published, to the nearest 10 m. Open in a map
- River, by its own name
- Blackwater
- River, by the map
- River BlackwaterPlaced on the river its name gives, 11 m from the line.
- Next gauge downstream
- Appleford Bridge On the River Blackwater · 11 km along the river
- Nearest gauge upstream
- Stisted On the River Blackwater · 8.2 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (30 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.4%
Sampled 11 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:02 | 91.4 | 91.4% |
| 3 Feb 2026, 09:16 | 95.2 | 95.2% |
| 2 Jan 2026, 09:53 | 93.8 | 93.8% |
| 3 Dec 2025, 13:08 | 89.1 | 89.1% |
| 18 Nov 2025, 10:09 | 77.6 | 77.6% |
| 6 Oct 2025, 11:47 | 76.4 | 76.4% |
| 2 Sep 2025, 11:58 | 62.1 | 62.1% |
| 14 Aug 2025, 15:06 | 71.6 | 71.6% |
| 28 Jul 2025, 08:22 | 66.9 | 66.9% |
| 5 Jun 2025, 12:57 | 88.7 | 88.7% |
| 19 May 2025, 13:52 | 111.3 | 111.3% |
| 1 Apr 2025, 08:08 | 87 | 87% |
| 6 Mar 2025, 13:29 | 112.4 | 112.4% |
| 5 Feb 2025, 09:25 | 98.4 | 98.4% |
| 10 Jan 2025, 14:10 | 96.3 | 96.3% |
| 6 Dec 2024, 12:19 | 92.8 | 92.8% |
| 1 Nov 2024, 08:53 | 79.8 | 79.8% |
| 2 Oct 2024, 11:29 | 88.2 | 88.2% |
| 9 Sep 2024, 09:37 | 74.4 | 74.4% |
| 1 Aug 2024, 10:49 | 87.7 | 87.7% |
| 4 Jul 2024, 11:20 | 95.7 | 95.7% |
| 14 Jun 2024, 12:12 | 98.3 | 98.3% |
| 2 May 2024, 10:46 | 98.8 | 98.8% |
| 2 Apr 2024, 09:53 | 95.1 | 95.1% |
| 1 Mar 2024, 14:11 | 97.6 | 97.6% |
| 1 Feb 2024, 14:56 | 97.4 | 97.4% |
| 2 Jan 2024, 15:28 | 101 | 101% |
| 4 Dec 2023, 10:22 | 89.9 | 89.9% |
| 7 Nov 2023, 09:43 | 90 | 90% |
| 2 Oct 2023, 09:50 | 67.6 | 67.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.5 mg/l
Sampled 11 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:02 | 10.5 | 10.5 mg/l |
| 3 Feb 2026, 09:16 | 11.7 | 11.7 mg/l |
| 2 Jan 2026, 09:53 | 12.6 | 12.6 mg/l |
| 3 Dec 2025, 13:08 | 10.7 | 10.7 mg/l |
| 18 Nov 2025, 10:09 | 9.31 | 9.31 mg/l |
| 6 Oct 2025, 11:47 | 7.98 | 7.98 mg/l |
| 2 Sep 2025, 11:58 | 6.01 | 6.01 mg/l |
| 14 Aug 2025, 15:06 | 6.44 | 6.44 mg/l |
| 28 Jul 2025, 08:22 | 6.49 | 6.49 mg/l |
| 5 Jun 2025, 12:57 | 8.84 | 8.84 mg/l |
| 19 May 2025, 13:52 | 11 | 11 mg/l |
| 1 Apr 2025, 08:08 | 9.78 | 9.78 mg/l |
| 6 Mar 2025, 13:29 | 13.1 | 13.1 mg/l |
| 5 Feb 2025, 09:25 | 12.7 | 12.7 mg/l |
| 10 Jan 2025, 14:10 | 12.8 | 12.8 mg/l |
| 6 Dec 2024, 12:19 | 11 | 11 mg/l |
| 1 Nov 2024, 08:53 | 8.64 | 8.64 mg/l |
| 2 Oct 2024, 11:29 | 9.13 | 9.13 mg/l |
| 9 Sep 2024, 09:37 | 7.2 | 7.2 mg/l |
| 1 Aug 2024, 10:49 | 8 | 8 mg/l |
| 4 Jul 2024, 11:20 | 9.32 | 9.32 mg/l |
| 14 Jun 2024, 12:12 | 9.99 | 9.99 mg/l |
| 2 May 2024, 10:46 | 10.2 | 10.2 mg/l |
| 2 Apr 2024, 09:53 | 10.7 | 10.7 mg/l |
| 1 Mar 2024, 14:11 | 11.5 | 11.5 mg/l |
| 1 Feb 2024, 14:56 | 11.5 | 11.5 mg/l |
| 2 Jan 2024, 15:28 | 11.7 | 11.7 mg/l |
| 4 Dec 2023, 10:22 | 11.4 | 11.4 mg/l |
| 7 Nov 2023, 09:43 | 10.5 | 10.5 mg/l |
| 2 Oct 2023, 09:50 | 6.65 | 6.65 mg/l |
Water temperature
code 0076 · °C
9.3 °C
Sampled 11 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:02 | 9.3 | 9.3 °C |
| 3 Feb 2026, 09:16 | 6.3 | 6.3 °C |
| 2 Jan 2026, 09:53 | 3.1 | 3.1 °C |
| 3 Dec 2025, 13:08 | 7.4 | 7.4 °C |
| 18 Nov 2025, 10:09 | 7.4 | 7.4 °C |
| 6 Oct 2025, 11:47 | 13.3 | 13.3 °C |
| 2 Sep 2025, 11:58 | 16.8 | 16.8 °C |
| 14 Aug 2025, 15:06 | 20.4 | 20.4 °C |
| 28 Jul 2025, 08:22 | 16.7 | 16.7 °C |
| 5 Jun 2025, 12:57 | 15.4 | 15.4 °C |
| 19 May 2025, 13:52 | 15.9 | 15.9 °C |
| 1 Apr 2025, 08:08 | 10.1 | 10.1 °C |
| 6 Mar 2025, 13:29 | 8.6 | 8.6 °C |
| 5 Feb 2025, 09:25 | 4.4 | 4.4 °C |
| 10 Jan 2025, 14:10 | 3.3 | 3.3 °C |
| 6 Dec 2024, 12:19 | 8 | 8 °C |
| 1 Nov 2024, 08:53 | 11.7 | 11.7 °C |
| 2 Oct 2024, 11:29 | 13.7 | 13.7 °C |
| 9 Sep 2024, 09:37 | 16.8 | 16.8 °C |
| 1 Aug 2024, 10:49 | 19.7 | 19.7 °C |
| 4 Jul 2024, 11:20 | 16.5 | 16.5 °C |
| 14 Jun 2024, 12:12 | 14.5 | 14.5 °C |
| 2 May 2024, 10:46 | 13.6 | 13.6 °C |
| 2 Apr 2024, 09:53 | 10 | 10 °C |
| 1 Mar 2024, 14:11 | 8.1 | 8.1 °C |
| 1 Feb 2024, 14:56 | 7.9 | 7.9 °C |
| 2 Jan 2024, 15:28 | 9 | 9 °C |
| 4 Dec 2023, 10:22 | 5.2 | 5.2 °C |
| 7 Nov 2023, 09:43 | 8.7 | 8.7 °C |
| 2 Oct 2023, 09:50 | 16 | 16 °C |
pH
code 0061
7.92
Sampled 11 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:02 | 7.92 | 7.92 |
| 3 Feb 2026, 09:16 | 8.18 | 8.18 |
| 2 Jan 2026, 09:53 | 8.23 | 8.23 |
| 3 Dec 2025, 13:08 | 7.93 | 7.93 |
| 18 Nov 2025, 10:09 | 7.94 | 7.94 |
| 6 Oct 2025, 11:47 | 7.56 | 7.56 |
| 2 Sep 2025, 11:58 | 7.59 | 7.59 |
| 14 Aug 2025, 15:06 | 7.68 | 7.68 |
| 28 Jul 2025, 08:22 | 7.68 | 7.68 |
| 5 Jun 2025, 12:57 | 8.04 | 8.04 |
| 19 May 2025, 13:52 | 8.2 | 8.2 |
| 1 Apr 2025, 08:08 | 8.19 | 8.19 |
| 6 Mar 2025, 13:29 | 8.15 | 8.15 |
| 5 Feb 2025, 09:25 | 8.19 | 8.19 |
| 10 Jan 2025, 14:10 | 8.05 | 8.05 |
| 6 Dec 2024, 12:19 | 8.05 | 8.05 |
| 1 Nov 2024, 08:53 | 7.78 | 7.78 |
| 2 Oct 2024, 11:29 | 7.88 | 7.88 |
| 9 Sep 2024, 09:37 | 7.85 | 7.85 |
| 1 Aug 2024, 10:49 | 7.85 | 7.85 |
| 4 Jul 2024, 11:20 | 8.06 | 8.06 |
| 14 Jun 2024, 12:12 | 8.11 | 8.11 |
| 2 May 2024, 10:46 | 8.15 | 8.15 |
| 2 Apr 2024, 09:53 | 8.18 | 8.18 |
| 1 Mar 2024, 14:11 | 8.18 | 8.18 |
| 1 Feb 2024, 14:56 | 8.16 | 8.16 |
| 2 Jan 2024, 15:28 | 8.12 | 8.12 |
| 4 Dec 2023, 10:22 | 7.94 | 7.94 |
| 7 Nov 2023, 09:43 | 7.95 | 7.95 |
| 2 Oct 2023, 09:50 | 7.75 | 7.75 |
Conductivity
at 25 °C · code 0077 · µS/cm
830 µS/cm
Sampled 11 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:02 | 830 | 830 µS/cm |
| 3 Feb 2026, 09:16 | 711 | 711 µS/cm |
| 2 Jan 2026, 09:53 | 987 | 987 µS/cm |
| 3 Dec 2025, 13:08 | 936 | 936 µS/cm |
| 18 Nov 2025, 10:09 | 882 | 882 µS/cm |
| 6 Oct 2025, 11:47 | 877 | 877 µS/cm |
| 2 Sep 2025, 11:58 | 994 | 994 µS/cm |
| 14 Aug 2025, 15:06 | 1042 | 1042 µS/cm |
| 28 Jul 2025, 08:22 | 993 | 993 µS/cm |
| 5 Jun 2025, 12:57 | 810 | 810 µS/cm |
| 19 May 2025, 13:52 | 822 | 822 µS/cm |
| 1 Apr 2025, 08:08 | 898 | 898 µS/cm |
| 6 Mar 2025, 13:29 | 852 | 852 µS/cm |
| 5 Feb 2025, 09:25 | 815 | 815 µS/cm |
| 10 Jan 2025, 14:10 | 758 | 758 µS/cm |
| 6 Dec 2024, 12:19 | 753 | 753 µS/cm |
| 1 Nov 2024, 08:53 | 889 | 889 µS/cm |
| 2 Oct 2024, 11:29 | 728 | 728 µS/cm |
| 9 Sep 2024, 09:37 | 894 | 894 µS/cm |
| 1 Aug 2024, 10:49 | 896 | 896 µS/cm |
| 4 Jul 2024, 11:20 | 867 | 867 µS/cm |
| 14 Jun 2024, 12:12 | 890 | 890 µS/cm |
| 2 May 2024, 10:46 | 772 | 772 µS/cm |
| 2 Apr 2024, 09:53 | 826 | 826 µS/cm |
| 1 Mar 2024, 14:11 | 703 | 703 µS/cm |
| 1 Feb 2024, 14:56 | 847 | 847 µS/cm |
| 2 Jan 2024, 15:28 | 544 | 544 µS/cm |
| 4 Dec 2023, 10:22 | 963 | 963 µS/cm |
| 7 Nov 2023, 09:43 | 744 | 744 µS/cm |
| 2 Oct 2023, 09:50 | 868 | 868 µS/cm |
Everything measured here
6 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 6 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – Mar 2026 | 91.4% 11 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – Mar 2026 | 10.5 mg/l 11 Mar 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – Mar 2026 | 9.3 °C 11 Mar 2026 |
| pH 0061 | River water | 30 | Oct 2023 – Mar 2026 | 7.92 11 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 30 | Oct 2023 – Mar 2026 | 830 µS/cm 11 Mar 2026 |
| Tributyl Tin as Cation 8944 | River water | 29 | Oct 2023 – Mar 2026 | below 0.00002 µg/l 11 Mar 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.