Blackwater River upstream of Shipdham
EA name: BLACKWATER RIVER U/S SHIPDHAM
Environment Agency sampling point AN-YAR003 · 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
- 14 Apr 2026, 11:046 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
- 23 since 18 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 594622, 306562As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blackwater
- River, by the map
- An unnamed streamOn a small stream traced into the river its name gives, 2 m from the line.
- Next gauge downstream
- Southburgh On the Blackwater River · 7.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
127.6%
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 127.6 | 127.6% |
| 2 Mar 2026, 12:48 | 118.3 | 118.3% |
| 13 Feb 2026, 11:15 | 100.2 | 100.2% |
| 5 Jan 2026, 13:01 | 107 | 107% |
| 4 Dec 2025, 11:13 | 95 | 95% |
| 20 Nov 2025, 10:56 | 95.8 | 95.8% |
| 27 Oct 2025, 11:00 | 97.6 | 97.6% |
| 5 Sep 2025, 10:41 | 57 | 57% |
| 4 Aug 2025, 13:15 | 111.5 | 111.5% |
| 3 Jul 2025, 11:31 | 56 | 56% |
| 19 Jun 2025, 12:36 | 73.3 | 73.3% |
| 7 May 2025, 10:00 | 105.1 | 105.1% |
| 2 Apr 2025, 12:37 | 109.8 | 109.8% |
| 6 Mar 2025, 11:40 | 98.3 | 98.3% |
| 10 Feb 2025, 11:14 | 95.9 | 95.9% |
| 24 Jan 2025, 11:06 | 95.2 | 95.2% |
| 4 Dec 2024, 12:22 | 94.6 | 94.6% |
| 19 Nov 2024, 13:10 | 89.3 | 89.3% |
| 15 Oct 2024, 10:07 | 88.1 | 88.1% |
| 30 Sep 2024, 12:03 | 79.8 | 79.8% |
| 21 Aug 2024, 09:35 | 71.9 | 71.9% |
| 19 Jul 2024, 09:58 | 75.6 | 75.6% |
| 18 Jun 2024, 10:55 | 82.3 | 82.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
14.6 mg/l
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 14.6 | 14.6 mg/l |
| 2 Mar 2026, 12:48 | 13.5 | 13.5 mg/l |
| 13 Feb 2026, 11:15 | 12.4 | 12.4 mg/l |
| 5 Jan 2026, 13:01 | 15.4 | 15.4 mg/l |
| 4 Dec 2025, 11:13 | 11.5 | 11.5 mg/l |
| 20 Nov 2025, 10:56 | 12.2 | 12.2 mg/l |
| 27 Oct 2025, 11:00 | 11.4 | 11.4 mg/l |
| 5 Sep 2025, 10:41 | 5.96 | 5.96 mg/l |
| 4 Aug 2025, 13:15 | 10.6 | 10.6 mg/l |
| 3 Jul 2025, 11:31 | 5.56 | 5.56 mg/l |
| 19 Jun 2025, 12:36 | 6.8 | 6.8 mg/l |
| 7 May 2025, 10:00 | 11.8 | 11.8 mg/l |
| 2 Apr 2025, 12:37 | 11.9 | 11.9 mg/l |
| 6 Mar 2025, 11:40 | 11.9 | 11.9 mg/l |
| 10 Feb 2025, 11:14 | 12.3 | 12.3 mg/l |
| 24 Jan 2025, 11:06 | 11.6 | 11.6 mg/l |
| 4 Dec 2024, 12:22 | 11.5 | 11.5 mg/l |
| 19 Nov 2024, 13:10 | 10.8 | 10.8 mg/l |
| 15 Oct 2024, 10:07 | 9.93 | 9.93 mg/l |
| 30 Sep 2024, 12:03 | 8.46 | 8.46 mg/l |
| 21 Aug 2024, 09:35 | 7.49 | 7.49 mg/l |
| 19 Jul 2024, 09:58 | 7.46 | 7.46 mg/l |
| 18 Jun 2024, 10:55 | 8.55 | 8.55 mg/l |
Water temperature
code 0076 · °C
9.3 °C
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 9.3 | 9.3 °C |
| 2 Mar 2026, 12:48 | 9.5 | 9.5 °C |
| 13 Feb 2026, 11:15 | 6.1 | 6.1 °C |
| 5 Jan 2026, 13:01 | 0.5 | 0.5 °C |
| 4 Dec 2025, 11:13 | 7.2 | 7.2 °C |
| 20 Nov 2025, 10:56 | 5.2 | 5.2 °C |
| 27 Oct 2025, 11:00 | 8.5 | 8.5 °C |
| 5 Sep 2025, 10:41 | 13.2 | 13.2 °C |
| 4 Aug 2025, 13:15 | 17.8 | 17.8 °C |
| 3 Jul 2025, 11:31 | 15.6 | 15.6 °C |
| 19 Jun 2025, 12:36 | 18.9 | 18.9 °C |
| 7 May 2025, 10:00 | 10.1 | 10.1 °C |
| 2 Apr 2025, 12:37 | 11.5 | 11.5 °C |
| 6 Mar 2025, 11:40 | 7 | 7 °C |
| 10 Feb 2025, 11:14 | 4.7 | 4.7 °C |
| 24 Jan 2025, 11:06 | 6.7 | 6.7 °C |
| 4 Dec 2024, 12:22 | 6.9 | 6.9 °C |
| 19 Nov 2024, 13:10 | 7.2 | 7.2 °C |
| 15 Oct 2024, 10:07 | 10 | 10 °C |
| 30 Sep 2024, 12:03 | 12.6 | 12.6 °C |
| 21 Aug 2024, 09:35 | 13.4 | 13.4 °C |
| 19 Jul 2024, 09:58 | 15.9 | 15.9 °C |
| 18 Jun 2024, 10:55 | 13.5 | 13.5 °C |
pH
code 0061
8.3
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 8.3 | 8.3 |
| 2 Mar 2026, 12:48 | 8.36 | 8.36 |
| 13 Feb 2026, 11:15 | 8.05 | 8.05 |
| 5 Jan 2026, 13:01 | 8.23 | 8.23 |
| 4 Dec 2025, 11:13 | 7.84 | 7.84 |
| 20 Nov 2025, 10:56 | 7.82 | 7.82 |
| 27 Oct 2025, 11:00 | 8.13 | 8.13 |
| 5 Sep 2025, 10:41 | 8.04 | 8.04 |
| 4 Aug 2025, 13:15 | 8.08 | 8.08 |
| 3 Jul 2025, 11:31 | 8.94 | 8.94 |
| 19 Jun 2025, 12:36 | 7.82 | 7.82 |
| 7 May 2025, 10:00 | 8.24 | 8.24 |
| 2 Apr 2025, 12:37 | 8.2 | 8.2 |
| 6 Mar 2025, 11:40 | 8.18 | 8.18 |
| 10 Feb 2025, 11:14 | 8.21 | 8.21 |
| 24 Jan 2025, 11:06 | 8.22 | 8.22 |
| 4 Dec 2024, 12:22 | 7.94 | 7.94 |
| 19 Nov 2024, 13:10 | 7.87 | 7.87 |
| 15 Oct 2024, 10:07 | 7.99 | 7.99 |
| 30 Sep 2024, 12:03 | 7.92 | 7.92 |
| 21 Aug 2024, 09:35 | 7.89 | 7.89 |
| 19 Jul 2024, 09:58 | 7.96 | 7.96 |
| 18 Jun 2024, 10:55 | 8.02 | 8.02 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2026, 11:15 | 0.038 | 0.038 mg/l |
| 5 Jan 2026, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 11:13 | 0.057 | 0.057 mg/l |
| 20 Nov 2025, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Oct 2025, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 10:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Aug 2025, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2025, 11:31 | 0.05 | 0.05 mg/l |
| 19 Jun 2025, 12:36 | 0.069 | 0.069 mg/l |
| 7 May 2025, 10:00 | 0.034 | 0.034 mg/l |
| 2 Apr 2025, 12:37 | 0.34 | 0.34 mg/l |
| 6 Mar 2025, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 11:14 | 0.069 | 0.069 mg/l |
| 24 Jan 2025, 11:06 | 0.31 | 0.31 mg/l |
| 4 Dec 2024, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2024, 13:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Oct 2024, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Sep 2024, 12:03 | 0.036 | 0.036 mg/l |
| 21 Aug 2024, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jul 2024, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2024, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.89 mg/l
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 3.89 | 3.89 mg/l |
| 2 Mar 2026, 12:48 | 9.67 | 9.67 mg/l |
| 13 Feb 2026, 11:15 | 11 | 11 mg/l |
| 5 Jan 2026, 13:01 | 12 | 12 mg/l |
| 4 Dec 2025, 11:13 | 14 | 14 mg/l |
| 20 Nov 2025, 10:56 | 14 | 14 mg/l |
| 27 Oct 2025, 11:00 | <0.196 | below 0.196 mg/l (not detected above this) |
| 5 Sep 2025, 10:41 | <0.196 | below 0.196 mg/l (not detected above this) |
| 4 Aug 2025, 13:15 | 0.286 | 0.286 mg/l |
| 3 Jul 2025, 11:31 | <0.196 | below 0.196 mg/l (not detected above this) |
| 19 Jun 2025, 12:36 | <0.196 | below 0.196 mg/l (not detected above this) |
| 7 May 2025, 10:00 | 7.17 | 7.17 mg/l |
| 2 Apr 2025, 12:37 | 6.93 | 6.93 mg/l |
| 6 Mar 2025, 11:40 | 11 | 11 mg/l |
| 10 Feb 2025, 11:14 | 9.96 | 9.96 mg/l |
| 24 Jan 2025, 11:06 | 9.65 | 9.65 mg/l |
| 4 Dec 2024, 12:22 | 12 | 12 mg/l |
| 19 Nov 2024, 13:10 | 7.58 | 7.58 mg/l |
| 15 Oct 2024, 10:07 | 9.98 | 9.98 mg/l |
| 30 Sep 2024, 12:03 | 5.46 | 5.46 mg/l |
| 21 Aug 2024, 09:35 | 1.09 | 1.09 mg/l |
| 19 Jul 2024, 09:58 | 5.07 | 5.07 mg/l |
| 18 Jun 2024, 10:55 | 6.57 | 6.57 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.013 mg/l
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 0.013 | 0.013 mg/l |
| 2 Mar 2026, 12:48 | 0.022 | 0.022 mg/l |
| 13 Feb 2026, 11:15 | 0.016 | 0.016 mg/l |
| 5 Jan 2026, 13:01 | 0.037 | 0.037 mg/l |
| 4 Dec 2025, 11:13 | 0.03 | 0.03 mg/l |
| 20 Nov 2025, 10:56 | 0.056 | 0.056 mg/l |
| 27 Oct 2025, 11:00 | 0.066 | 0.066 mg/l |
| 5 Sep 2025, 10:41 | 0.19 | 0.19 mg/l |
| 4 Aug 2025, 13:15 | 0.026 | 0.026 mg/l |
| 3 Jul 2025, 11:31 | 0.02 | 0.02 mg/l |
| 19 Jun 2025, 12:36 | 0.034 | 0.034 mg/l |
| 7 May 2025, 10:00 | 0.021 | 0.021 mg/l |
| 2 Apr 2025, 12:37 | 0.027 | 0.027 mg/l |
| 6 Mar 2025, 11:40 | 0.015 | 0.015 mg/l |
| 10 Feb 2025, 11:14 | 0.025 | 0.025 mg/l |
| 24 Jan 2025, 11:06 | 0.031 | 0.031 mg/l |
| 4 Dec 2024, 12:22 | 0.015 | 0.015 mg/l |
| 19 Nov 2024, 13:10 | 0.088 | 0.088 mg/l |
| 15 Oct 2024, 10:07 | 0.03 | 0.03 mg/l |
| 30 Sep 2024, 12:03 | 0.041 | 0.041 mg/l |
| 21 Aug 2024, 09:35 | 0.011 | 0.011 mg/l |
| 19 Jul 2024, 09:58 | 0.032 | 0.032 mg/l |
| 18 Jun 2024, 10:55 | 0.025 | 0.025 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
660 µS/cm
Sampled 14 Apr 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Apr 2026, 11:04 | 660 | 660 µS/cm |
| 2 Mar 2026, 12:48 | 712 | 712 µS/cm |
| 13 Feb 2026, 11:15 | 678 | 678 µS/cm |
| 5 Jan 2026, 13:01 | 796 | 796 µS/cm |
| 4 Dec 2025, 11:13 | 723 | 723 µS/cm |
| 20 Nov 2025, 10:56 | 692 | 692 µS/cm |
| 27 Oct 2025, 11:00 | 578 | 578 µS/cm |
| 5 Sep 2025, 10:41 | 357 | 357 µS/cm |
| 4 Aug 2025, 13:15 | 360 | 360 µS/cm |
| 3 Jul 2025, 11:31 | 734 | 734 µS/cm |
| 19 Jun 2025, 12:36 | 522 | 522 µS/cm |
| 7 May 2025, 10:00 | 700 | 700 µS/cm |
| 2 Apr 2025, 12:37 | 741 | 741 µS/cm |
| 6 Mar 2025, 11:40 | 751 | 751 µS/cm |
| 10 Feb 2025, 11:14 | 750 | 750 µS/cm |
| 24 Jan 2025, 11:06 | 800 | 800 µS/cm |
| 4 Dec 2024, 12:22 | 736 | 736 µS/cm |
| 19 Nov 2024, 13:10 | 678 | 678 µS/cm |
| 15 Oct 2024, 10:07 | 716 | 716 µS/cm |
| 30 Sep 2024, 12:03 | 712 | 712 µS/cm |
| 21 Aug 2024, 09:35 | 709 | 709 µS/cm |
| 19 Jul 2024, 09:58 | 743 | 743 µS/cm |
| 18 Jun 2024, 10:55 | 753 | 753 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 | 23 | Jun 2024 – Apr 2026 | 127.6% 14 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – Apr 2026 | 14.6 mg/l 14 Apr 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – Apr 2026 | 9.3 °C 14 Apr 2026 |
| pH 0061 | River water | 23 | Jun 2024 – Apr 2026 | 8.3 14 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – Apr 2026 | below 0.03 mg/l 14 Apr 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – Apr 2026 | 3.89 mg/l 14 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – Apr 2026 | 0.013 mg/l 14 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – Apr 2026 | 660 µS/cm 14 Apr 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – Apr 2026 | 260 mg/l 14 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – Apr 2026 | below 0.00052 mg/l 14 Apr 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jun 2024 – Apr 2026 | 2 mg/l 14 Apr 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – Apr 2026 | 0.01 mg/l 14 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – Apr 2026 | 3.9 mg/l 14 Apr 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.