Black Marsh Brook at Priest Weston Road
EA name: BLACK MARSH BROOK AT PRIEST WESTON RD
Environment Agency sampling point MD-20069100 · 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
- 28 Aug 2026, 12:2034 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 since 23 Oct 2023 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 331880, 297913As published, to the nearest 1 m. Open in a map
- River, by its own name
- Black Marsh Brook
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 0 m from the line.
- Next gauge downstream
- Onibury On the River Onny · 33 km along the river
- Why it was sampled
- Monitoring (national agency policy) (34 samples)
10 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
138.8%
Sampled 27 Apr 2026, 5 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Apr 2026, 13:37 | 138.8 | 138.8% |
| 23 Mar 2026, 12:45 | 117.6 | 117.6% |
| 4 Mar 2026, 11:43 | 102.5 | 102.5% |
| 30 Jan 2026, 11:37 | 97.8 | 97.8% |
| 18 Dec 2025, 11:49 | 90.5 | 90.5% |
| 25 Nov 2025, 11:31 | 89 | 89% |
| 29 Oct 2025, 12:10 | 89.3 | 89.3% |
| 25 Apr 2025, 11:29 | 99.4 | 99.4% |
| 27 Mar 2025, 12:02 | 97.8 | 97.8% |
| 28 Feb 2025, 13:40 | 98.7 | 98.7% |
| 18 Dec 2024, 10:52 | 89.6 | 89.6% |
| 21 Nov 2024, 11:55 | 98.4 | 98.4% |
| 1 Nov 2024, 10:34 | 80.3 | 80.3% |
| 24 Sep 2024, 11:43 | 73.7 | 73.7% |
| 22 Aug 2024, 11:40 | 48.2 | 48.2% |
| 27 Jun 2024, 11:01 | 57.5 | 57.5% |
| 23 May 2024, 14:32 | 89.4 | 89.4% |
| 4 Apr 2024, 10:01 | 97.3 | 97.3% |
Water temperature
code 0076 · °C
15.2 °C
Sampled 27 Apr 2026, 5 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Apr 2026, 13:37 | 15.2 | 15.2 °C |
| 23 Mar 2026, 12:45 | 8.6 | 8.6 °C |
| 4 Mar 2026, 11:43 | 8.2 | 8.2 °C |
| 30 Jan 2026, 11:37 | 5.4 | 5.4 °C |
| 18 Dec 2025, 11:49 | 7.7 | 7.7 °C |
| 25 Nov 2025, 11:31 | 6.1 | 6.1 °C |
| 29 Oct 2025, 12:10 | 8.9 | 8.9 °C |
| 25 Apr 2025, 11:29 | 10.6 | 10.6 °C |
| 27 Mar 2025, 12:02 | 12.3 | 12.3 °C |
| 28 Feb 2025, 13:40 | 5.2 | 5.2 °C |
| 18 Dec 2024, 10:52 | 9.4 | 9.4 °C |
| 21 Nov 2024, 11:55 | 1.8 | 1.8 °C |
| 1 Nov 2024, 10:34 | 10.4 | 10.4 °C |
| 24 Sep 2024, 11:43 | 12.4 | 12.4 °C |
| 22 Aug 2024, 11:40 | 14.3 | 14.3 °C |
| 27 Jun 2024, 11:01 | 15.8 | 15.8 °C |
| 23 May 2024, 14:32 | 11.9 | 11.9 °C |
| 4 Apr 2024, 10:01 | 8.4 | 8.4 °C |
pH
code 0061
7.7
Sampled 27 Apr 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Apr 2026, 13:37 | 7.7 | 7.7 |
| 23 Mar 2026, 12:45 | 7.3 | 7.3 |
| 4 Mar 2026, 11:43 | 7.2 | 7.2 |
| 30 Jan 2026, 11:37 | 7.1 | 7.1 |
| 18 Dec 2025, 11:49 | 6.9 | 6.9 |
| 25 Nov 2025, 11:31 | 7 | 7 |
| 29 Oct 2025, 12:10 | 7.1 | 7.1 |
| 25 Apr 2025, 11:29 | 7.4 | 7.4 |
| 27 Mar 2025, 12:02 | 7.9 | 7.9 |
| 28 Feb 2025, 13:40 | 7.5 | 7.5 |
| 18 Dec 2024, 10:52 | 7.2 | 7.2 |
| 21 Nov 2024, 11:55 | 7.4 | 7.4 |
| 1 Nov 2024, 10:34 | 7.2 | 7.2 |
| 24 Sep 2024, 11:43 | 7.08 | 7.08 |
| 22 Aug 2024, 11:40 | 6.91 | 6.91 |
| 27 Jun 2024, 11:01 | 7.06 | 7.06 |
| 23 May 2024, 14:32 | 7.43 | 7.43 |
| 12 Apr 2024, 10:10 | 7.19 | 7.19 |
| 4 Apr 2024, 10:01 | 7.5 | 7.5 |
| 13 Feb 2024, 12:36 | 7.43 | 7.43 |
| 3 Jan 2024, 09:32 | 6.95 | 6.95 |
| 18 Dec 2023, 12:48 | 6.84 | 6.84 |
| 3 Nov 2023, 10:14 | 6.81 | 6.81 |
| 23 Oct 2023, 10:02 | 7.07 | 7.07 |
Conductivity
at 25 °C · code 0077 · µS/cm
261 µS/cm
Sampled 27 Apr 2026, 5 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Apr 2026, 13:37 | 261 | 261 µS/cm |
| 23 Mar 2026, 12:45 | 201 | 201 µS/cm |
| 4 Mar 2026, 11:43 | 169 | 169 µS/cm |
| 30 Jan 2026, 11:37 | 159 | 159 µS/cm |
| 18 Dec 2025, 11:49 | 165 | 165 µS/cm |
| 25 Nov 2025, 11:31 | 176 | 176 µS/cm |
| 29 Oct 2025, 12:10 | 308 | 308 µS/cm |
| 25 Apr 2025, 11:29 | 269 | 269 µS/cm |
| 27 Mar 2025, 12:02 | 278 | 278 µS/cm |
| 28 Feb 2025, 13:40 | 202 | 202 µS/cm |
| 18 Dec 2024, 10:52 | 198 | 198 µS/cm |
| 21 Nov 2024, 11:55 | 193 | 193 µS/cm |
| 1 Nov 2024, 10:34 | 217 | 217 µS/cm |
| 24 Sep 2024, 11:43 | 173 | 173 µS/cm |
| 22 Aug 2024, 11:40 | 513 | 513 µS/cm |
| 27 Jun 2024, 11:01 | 316 | 316 µS/cm |
| 23 May 2024, 14:32 | 131 | 131 µS/cm |
| 4 Apr 2024, 10:01 | 111 | 111 µS/cm |
Everything measured here
32 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 32 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 18 | Apr 2024 – Apr 2026 | 138.8% 27 Apr 2026 |
| Temperature of Water 0076 | River water | 18 | Apr 2024 – Apr 2026 | 15.2 °C 27 Apr 2026 |
| pH 0061 | River water | 24 | Oct 2023 – Apr 2026 | 7.7 27 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 18 | Apr 2024 – Apr 2026 | 261 µS/cm 27 Apr 2026 |
| Aluminium, Dissolved 6037 | River water | 5 | Nov 2023 – Apr 2024 | 110 µg/l 12 Apr 2024 |
| Barium, Dissolved 9446 | River water | 18 | Apr 2024 – Apr 2026 | 79 µg/l 27 Apr 2026 |
| Boron, Dissolved 9447 | River water | 18 | Apr 2024 – Apr 2026 | below 100 µg/l 27 Apr 2026 |
| Cadmium 0108 | River water | 18 | Apr 2024 – Apr 2026 | 0.85 µg/l 27 Apr 2026 |
| Cadmium, Dissolved 0106 | River water | 23 | Nov 2023 – Apr 2026 | 0.82 µg/l 27 Apr 2026 |
| Calcium, Dissolved 0239 | River water | 23 | Nov 2023 – Apr 2026 | 25 mg/l 27 Apr 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 22 | Nov 2023 – Apr 2026 | 6.9 mg/l 27 Apr 2026 |
| Chromium, Dissolved 3409 | River water | 5 | Nov 2023 – Apr 2024 | 0.6 µg/l 12 Apr 2024 |
| Copper 6452 | River water | 18 | Apr 2024 – Apr 2026 | 3.3 µg/l 27 Apr 2026 |
| Copper, Dissolved 6450 | River water | 23 | Nov 2023 – Apr 2026 | 2.9 µg/l 27 Apr 2026 |
| Hardness, Total as CaCO3 0158 | River water | 23 | Nov 2023 – Apr 2026 | 85.1 mg/l 27 Apr 2026 |
| Iron, Dissolved 6460 | River water | 18 | Apr 2024 – Apr 2026 | 56 µg/l 27 Apr 2026 |
| Lead 0050 | River water | 18 | Apr 2024 – Apr 2026 | 5.4 µg/l 27 Apr 2026 |
| Lead, Dissolved 0052 | River water | 23 | Nov 2023 – Apr 2026 | 3.6 µg/l 27 Apr 2026 |
| Lithium, Dissolved 4201 | River water | 18 | Apr 2024 – Apr 2026 | below 100 µg/l 27 Apr 2026 |
| Magnesium, Dissolved 0235 | River water | 23 | Nov 2023 – Apr 2026 | 5.5 mg/l 27 Apr 2026 |
| Manganese, Dissolved 6458 | River water | 18 | Apr 2024 – Apr 2026 | 70 µg/l 27 Apr 2026 |
| Nickel 6462 | River water | 18 | Apr 2024 – Apr 2026 | 3.7 µg/l 27 Apr 2026 |
| Nickel, Dissolved 3410 | River water | 23 | Nov 2023 – Apr 2026 | 3.7 µg/l 27 Apr 2026 |
| No flow /No sample 7668 | River water | 10 | May 2025 – Aug 2026 | No flow/discharge at sampling point 28 Aug 2026 |
| pH : In Situ 3169 | River water | 11 | Dec 2024 – Apr 2026 | 7.43 27 Apr 2026 |
| Potassium, Dissolved 0209 | River water | 18 | Apr 2024 – Apr 2026 | 2.4 mg/l 27 Apr 2026 |
| Sodium, Dissolved 0205 | River water | 18 | Apr 2024 – Apr 2026 | 17 mg/l 27 Apr 2026 |
| Solids, Suspended at 105 C 0135 | River water | 18 | Apr 2024 – Apr 2026 | below 3 mg/l 27 Apr 2026 |
| Strontium, Filtered 6693 | River water | 18 | Apr 2024 – Apr 2026 | 74 µg/l 27 Apr 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 18 | Apr 2024 – Apr 2026 | 21 mg/l 27 Apr 2026 |
| Zinc 6455 | River water | 18 | Apr 2024 – Apr 2026 | 88 µg/l 27 Apr 2026 |
| Zinc, Dissolved 3408 | River water | 23 | Nov 2023 – Apr 2026 | 84 µg/l 27 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.