Marazion River at Road Bridge
EA name: MARAZION RIVER AT ROAD BRIDGE
Environment Agency sampling point SW-82110704 · 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
- 13 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
- 36 since 20 Dec 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 151364, 31052As published, to the nearest 1 m. Open in a map
- River, by its own name
- Marazion
- River, by the map
- Not placedIts name gives Marazion; the only line close by, 0 m away, is Red River and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (32 samples)
Planned investigation (local monitoring) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96%
Sampled 13 Apr 2026, 6 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 96 | 96% |
| 12 Mar 2026, 10:44 | 91.7 | 91.7% |
| 2 Feb 2026, 13:38 | 91.1 | 91.1% |
| 2 Jan 2026, 11:54 | 91.1 | 91.1% |
| 11 Dec 2025, 11:33 | 88.8 | 88.8% |
| 10 Nov 2025, 13:15 | 87.8 | 87.8% |
| 24 Oct 2025, 13:43 | 89.3 | 89.3% |
| 11 Sep 2025, 12:35 | 87.5 | 87.5% |
| 4 Aug 2025, 14:30 | 88.2 | 88.2% |
| 10 Jul 2025, 10:07 | 92 | 92% |
| 10 Jun 2025, 10:51 | 95.2 | 95.2% |
| 12 May 2025, 10:43 | 94.7 | 94.7% |
| 23 Apr 2025, 11:10 | 98.6 | 98.6% |
| 4 Mar 2025, 12:53 | 95.5 | 95.5% |
| 3 Mar 2025, 10:59 | 93.8 | 93.8% |
| 11 Feb 2025, 09:46 | 95.1 | 95.1% |
| 30 Jan 2025, 10:09 | 92.1 | 92.1% |
| 20 Jan 2025, 11:06 | 92.8 | 92.8% |
| 4 Dec 2024, 10:14 | 90.8 | 90.8% |
| 28 Nov 2024, 09:08 | 85.7 | 85.7% |
| 18 Nov 2024, 12:37 | 91.2 | 91.2% |
| 17 Oct 2024, 12:05 | 84.6 | 84.6% |
| 17 Oct 2024, 08:34 | 79.6 | 79.6% |
| 23 Sep 2024, 09:51 | 78.5 | 78.5% |
| 22 Aug 2024, 12:49 | 88.6 | 88.6% |
| 16 Jul 2024, 12:30 | 94.5 | 94.5% |
| 17 Jun 2024, 12:14 | 96 | 96% |
| 13 May 2024, 11:06 | 92 | 92% |
| 15 Apr 2024, 12:58 | 98 | 98% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 13 Apr 2026, 6 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 10.8 | 10.8 mg/l |
| 12 Mar 2026, 10:44 | 10.1 | 10.1 mg/l |
| 2 Feb 2026, 13:38 | 10.5 | 10.5 mg/l |
| 2 Jan 2026, 11:54 | 10.5 | 10.5 mg/l |
| 11 Dec 2025, 11:33 | 9.61 | 9.61 mg/l |
| 10 Nov 2025, 13:15 | 9.33 | 9.33 mg/l |
| 24 Oct 2025, 13:43 | 9.76 | 9.76 mg/l |
| 11 Sep 2025, 12:35 | 9.03 | 9.03 mg/l |
| 4 Aug 2025, 14:30 | 8.59 | 8.59 mg/l |
| 10 Jul 2025, 10:07 | 9.33 | 9.33 mg/l |
| 10 Jun 2025, 10:51 | 9.81 | 9.81 mg/l |
| 12 May 2025, 10:43 | 10 | 10 mg/l |
| 23 Apr 2025, 11:10 | 10.6 | 10.6 mg/l |
| 3 Mar 2025, 10:59 | 11 | 11 mg/l |
| 11 Feb 2025, 09:46 | 11.3 | 11.3 mg/l |
| 20 Jan 2025, 11:06 | 10.8 | 10.8 mg/l |
| 4 Dec 2024, 10:14 | 10.1 | 10.1 mg/l |
| 18 Nov 2024, 12:37 | 9.81 | 9.81 mg/l |
| 17 Oct 2024, 12:05 | 8.81 | 8.81 mg/l |
| 23 Sep 2024, 09:51 | 8.02 | 8.02 mg/l |
| 22 Aug 2024, 12:49 | 8.82 | 8.82 mg/l |
| 16 Jul 2024, 12:30 | 9.63 | 9.63 mg/l |
| 17 Jun 2024, 12:14 | 10 | 10 mg/l |
| 13 May 2024, 11:06 | 9.61 | 9.61 mg/l |
| 15 Apr 2024, 12:58 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
9.9 °C
Sampled 13 Apr 2026, 6 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 9.9 | 9.9 °C |
| 12 Mar 2026, 10:44 | 10.8 | 10.8 °C |
| 2 Feb 2026, 13:38 | 9.2 | 9.2 °C |
| 2 Jan 2026, 11:54 | 9.2 | 9.2 °C |
| 11 Dec 2025, 11:33 | 11.7 | 11.7 °C |
| 10 Nov 2025, 13:15 | 12.5 | 12.5 °C |
| 24 Oct 2025, 13:43 | 11.3 | 11.3 °C |
| 11 Sep 2025, 12:35 | 13.8 | 13.8 °C |
| 4 Aug 2025, 14:30 | 16.5 | 16.5 °C |
| 10 Jul 2025, 10:07 | 14.6 | 14.6 °C |
| 10 Jun 2025, 10:51 | 13.9 | 13.9 °C |
| 12 May 2025, 10:43 | 12.8 | 12.8 °C |
| 23 Apr 2025, 11:10 | 11.9 | 11.9 °C |
| 4 Mar 2025, 12:53 | 9.2 | 9.2 °C |
| 3 Mar 2025, 10:59 | 8.2 | 8.2 °C |
| 11 Feb 2025, 09:46 | 7.7 | 7.7 °C |
| 30 Jan 2025, 10:09 | 8.6 | 8.6 °C |
| 20 Jan 2025, 11:06 | 8.7 | 8.7 °C |
| 4 Dec 2024, 10:14 | 10.6 | 10.6 °C |
| 28 Nov 2024, 09:08 | 10.4 | 10.4 °C |
| 18 Nov 2024, 12:37 | 12 | 12 °C |
| 17 Oct 2024, 12:05 | 13.4 | 13.4 °C |
| 17 Oct 2024, 08:34 | 13 | 13 °C |
| 23 Sep 2024, 09:51 | 14.3 | 14.3 °C |
| 22 Aug 2024, 12:49 | 15.5 | 15.5 °C |
| 16 Jul 2024, 12:30 | 14.4 | 14.4 °C |
| 17 Jun 2024, 12:14 | 13.2 | 13.2 °C |
| 13 May 2024, 11:06 | 13.3 | 13.3 °C |
| 15 Apr 2024, 12:58 | 11.7 | 11.7 °C |
pH
code 0061
7.66
Sampled 13 Apr 2026, 6 months ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 7.66 | 7.66 |
| 12 Mar 2026, 10:44 | 7.29 | 7.29 |
| 2 Feb 2026, 13:38 | 7.19 | 7.19 |
| 2 Jan 2026, 11:54 | 7.27 | 7.27 |
| 11 Dec 2025, 11:33 | 7.17 | 7.17 |
| 10 Nov 2025, 13:15 | 7.2 | 7.2 |
| 24 Oct 2025, 13:43 | 7.25 | 7.25 |
| 11 Sep 2025, 12:35 | 7.07 | 7.07 |
| 4 Aug 2025, 14:30 | 7.53 | 7.53 |
| 10 Jul 2025, 10:07 | 7.5 | 7.5 |
| 10 Jun 2025, 10:51 | 7.35 | 7.35 |
| 12 May 2025, 10:43 | 7.29 | 7.29 |
| 23 Apr 2025, 11:10 | 7.37 | 7.37 |
| 4 Mar 2025, 12:53 | 7.6 | 7.6 |
| 3 Mar 2025, 10:59 | 7.31 | 7.31 |
| 11 Feb 2025, 09:46 | 7.47 | 7.47 |
| 30 Jan 2025, 10:09 | 7.4 | 7.4 |
| 20 Jan 2025, 11:06 | 7.46 | 7.46 |
| 4 Dec 2024, 10:14 | 7.31 | 7.31 |
| 28 Nov 2024, 09:08 | 7.9 | 7.9 |
| 18 Nov 2024, 12:37 | 7.4 | 7.4 |
| 17 Oct 2024, 12:05 | 7.04 | 7.04 |
| 17 Oct 2024, 08:34 | 7.2 | 7.2 |
| 23 Sep 2024, 09:51 | 7.17 | 7.17 |
| 22 Aug 2024, 12:49 | 7.33 | 7.33 |
| 16 Jul 2024, 12:30 | 7.42 | 7.42 |
| 17 Jun 2024, 12:14 | 7.47 | 7.47 |
| 13 May 2024, 11:06 | 7.39 | 7.39 |
| 15 Apr 2024, 12:58 | 7.33 | 7.33 |
| 2 Apr 2024, 11:06 | 7.35 | 7.35 |
| 13 Mar 2024, 10:51 | 7.31 | 7.31 |
| 15 Feb 2024, 10:53 | 7.25 | 7.25 |
| 8 Feb 2024, 09:52 | 7.05 | 7.05 |
| 25 Jan 2024, 12:00 | 7.2 | 7.2 |
| 10 Jan 2024, 10:47 | 7.15 | 7.15 |
| 20 Dec 2023, 12:00 | 7.18 | 7.18 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 13 Apr 2026, 6 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2026, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jan 2026, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Dec 2025, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Nov 2025, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2025, 13:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Sep 2025, 12:35 | 0.043 | 0.043 mg/l |
| 4 Aug 2025, 14:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jul 2025, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jun 2025, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 May 2025, 10:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Apr 2025, 11:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2025, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 11:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2024, 10:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 12:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2024, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Sep 2024, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 12:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 12:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2024, 11:06 | 0.039 | 0.039 mg/l |
| 15 Apr 2024, 12:58 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.8 mg/l
Sampled 13 Apr 2026, 6 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 3.8 | 3.8 mg/l |
| 12 Mar 2026, 10:44 | 4.4 | 4.4 mg/l |
| 2 Feb 2026, 13:38 | 4.5 | 4.5 mg/l |
| 2 Jan 2026, 11:54 | 4.5 | 4.5 mg/l |
| 11 Dec 2025, 11:33 | 4.2 | 4.2 mg/l |
| 10 Nov 2025, 13:15 | 2.5 | 2.5 mg/l |
| 24 Oct 2025, 13:43 | 2.3 | 2.3 mg/l |
| 11 Sep 2025, 12:35 | 2.3 | 2.3 mg/l |
| 4 Aug 2025, 14:30 | 3.6 | 3.6 mg/l |
| 10 Jul 2025, 10:07 | 3.9 | 3.9 mg/l |
| 10 Jun 2025, 10:51 | 4 | 4 mg/l |
| 12 May 2025, 10:43 | 3.9 | 3.9 mg/l |
| 23 Apr 2025, 11:10 | 3.1 | 3.1 mg/l |
| 3 Mar 2025, 10:59 | 4.5 | 4.5 mg/l |
| 11 Feb 2025, 09:46 | 4.5 | 4.5 mg/l |
| 20 Jan 2025, 11:06 | 4.4 | 4.4 mg/l |
| 4 Dec 2024, 10:14 | 3.9 | 3.9 mg/l |
| 18 Nov 2024, 12:37 | 3.5 | 3.5 mg/l |
| 17 Oct 2024, 12:05 | 2.5 | 2.5 mg/l |
| 23 Sep 2024, 09:51 | 2.8 | 2.8 mg/l |
| 22 Aug 2024, 12:49 | 3.59 | 3.59 mg/l |
| 16 Jul 2024, 12:30 | 3.8 | 3.8 mg/l |
| 17 Jun 2024, 12:14 | 3.9 | 3.9 mg/l |
| 13 May 2024, 11:06 | 3.2 | 3.2 mg/l |
| 15 Apr 2024, 12:58 | 4.1 | 4.1 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.016 mg/l
Sampled 13 Apr 2026, 6 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 0.016 | 0.016 mg/l |
| 12 Mar 2026, 10:44 | 0.014 | 0.014 mg/l |
| 2 Feb 2026, 13:38 | 0.017 | 0.017 mg/l |
| 2 Jan 2026, 11:54 | 0.021 | 0.021 mg/l |
| 11 Dec 2025, 11:33 | 0.042 | 0.042 mg/l |
| 10 Nov 2025, 13:15 | 0.027 | 0.027 mg/l |
| 24 Oct 2025, 13:43 | 0.022 | 0.022 mg/l |
| 11 Sep 2025, 12:35 | 0.029 | 0.029 mg/l |
| 4 Aug 2025, 14:30 | 0.028 | 0.028 mg/l |
| 10 Jul 2025, 10:07 | 0.024 | 0.024 mg/l |
| 10 Jun 2025, 10:51 | 0.02 | 0.02 mg/l |
| 12 May 2025, 10:43 | 0.013 | 0.013 mg/l |
| 23 Apr 2025, 11:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Mar 2025, 10:59 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Feb 2025, 09:46 | 0.018 | 0.018 mg/l |
| 20 Jan 2025, 11:06 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Dec 2024, 10:14 | 0.01 | 0.01 mg/l |
| 18 Nov 2024, 12:37 | 0.015 | 0.015 mg/l |
| 17 Oct 2024, 12:05 | 0.025 | 0.025 mg/l |
| 23 Sep 2024, 09:51 | 0.015 | 0.015 mg/l |
| 22 Aug 2024, 12:49 | 0.014 | 0.014 mg/l |
| 16 Jul 2024, 12:30 | 0.013 | 0.013 mg/l |
| 17 Jun 2024, 12:14 | <0.01 | below 0.01 mg/l (not detected above this) |
| 13 May 2024, 11:06 | 0.033 | 0.033 mg/l |
| 15 Apr 2024, 12:58 | 0.012 | 0.012 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
349 µS/cm
Sampled 13 Apr 2026, 6 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Apr 2026, 11:04 | 349 | 349 µS/cm |
| 12 Mar 2026, 10:44 | 339 | 339 µS/cm |
| 2 Feb 2026, 13:38 | 326 | 326 µS/cm |
| 2 Jan 2026, 11:54 | 345 | 345 µS/cm |
| 11 Dec 2025, 11:33 | 305 | 305 µS/cm |
| 10 Nov 2025, 13:15 | 263 | 263 µS/cm |
| 24 Oct 2025, 13:43 | 313 | 313 µS/cm |
| 11 Sep 2025, 12:35 | 395 | 395 µS/cm |
| 4 Aug 2025, 14:30 | 376 | 376 µS/cm |
| 10 Jul 2025, 10:07 | 381 | 381 µS/cm |
| 10 Jun 2025, 10:51 | 367 | 367 µS/cm |
| 12 May 2025, 10:43 | 336 | 336 µS/cm |
| 23 Apr 2025, 11:10 | 301 | 301 µS/cm |
| 4 Mar 2025, 12:53 | 331 | 331 µS/cm |
| 3 Mar 2025, 10:59 | 329 | 329 µS/cm |
| 11 Feb 2025, 09:46 | 345 | 345 µS/cm |
| 30 Jan 2025, 10:09 | 354 | 354 µS/cm |
| 20 Jan 2025, 11:06 | 344 | 344 µS/cm |
| 4 Dec 2024, 10:14 | 319 | 319 µS/cm |
| 28 Nov 2024, 09:08 | 304 | 304 µS/cm |
| 18 Nov 2024, 12:37 | 330 | 330 µS/cm |
| 17 Oct 2024, 12:05 | 309 | 309 µS/cm |
| 17 Oct 2024, 08:34 | 310 | 310 µS/cm |
| 23 Sep 2024, 09:51 | 495 | 495 µS/cm |
| 22 Aug 2024, 12:49 | 1326 | 1326 µS/cm |
| 16 Jul 2024, 12:30 | 374 | 374 µS/cm |
| 17 Jun 2024, 12:14 | 370 | 370 µS/cm |
| 13 May 2024, 11:06 | 289 | 289 µS/cm |
| 15 Apr 2024, 12:58 | 340 | 340 µS/cm |
Everything measured here
40 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 40 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Apr 2024 – Apr 2026 | 96% 13 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Apr 2024 – Apr 2026 | 10.8 mg/l 13 Apr 2026 |
| Temperature of Water 0076 | River water | 29 | Apr 2024 – Apr 2026 | 9.9 °C 13 Apr 2026 |
| pH 0061 | River water | 36 | Dec 2023 – Apr 2026 | 7.66 13 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Apr 2024 – Apr 2026 | below 0.03 mg/l 13 Apr 2026 |
| Nitrate as N 0117 | River water | 25 | Apr 2024 – Apr 2026 | 3.8 mg/l 13 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Apr 2024 – Apr 2026 | 0.016 mg/l 13 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Apr 2024 – Apr 2026 | 349 µS/cm 13 Apr 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Apr 2024 – Apr 2026 | 66 mg/l 13 Apr 2026 |
| Aluminium, Dissolved 6037 | River water | 7 | Dec 2023 – Apr 2024 | 44 µg/l 2 Apr 2024 |
| Ammonia un-ionised as N 0119 | River water | 25 | Apr 2024 – Apr 2026 | below 0.00025 mg/l 13 Apr 2026 |
| Barium, Dissolved 9446 | River water | 4 | Oct 2024 – Mar 2025 | below 10 µg/l 4 Mar 2025 |
| BOD : 5 Day ATU 0085 | River water | 24 | Apr 2024 – Apr 2026 | 1.2 mg/l 13 Apr 2026 |
| Boron, Dissolved 9447 | River water | 4 | Oct 2024 – Mar 2025 | below 100 µg/l 4 Mar 2025 |
| Cadmium 0108 | River water | 4 | Oct 2024 – Mar 2025 | 0.27 µg/l 4 Mar 2025 |
| Cadmium, Dissolved 0106 | River water | 11 | Dec 2023 – Mar 2025 | 0.25 µg/l 4 Mar 2025 |
| Calcium, Dissolved 0239 | River water | 11 | Dec 2023 – Mar 2025 | 27 mg/l 4 Mar 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 11 | Dec 2023 – Mar 2025 | 1.8 mg/l 4 Mar 2025 |
| Chromium, Dissolved 3409 | River water | 7 | Dec 2023 – Apr 2024 | below 0.5 µg/l 2 Apr 2024 |
| Copper 6452 | River water | 4 | Oct 2024 – Mar 2025 | 17 µg/l 4 Mar 2025 |
| Copper, Dissolved 6450 | River water | 11 | Dec 2023 – Mar 2025 | 12 µg/l 4 Mar 2025 |
| Hardness, Total as CaCO3 0158 | River water | 4 | Oct 2024 – Mar 2025 | 99.5 mg/l 4 Mar 2025 |
| Iron, Dissolved 6460 | River water | 4 | Oct 2024 – Mar 2025 | 100 µg/l 4 Mar 2025 |
| Lead 0050 | River water | 4 | Oct 2024 – Mar 2025 | below 2 µg/l 4 Mar 2025 |
| Lead, Dissolved 0052 | River water | 11 | Dec 2023 – Mar 2025 | below 2 µg/l 4 Mar 2025 |
| Lithium, Dissolved 4201 | River water | 4 | Oct 2024 – Mar 2025 | below 100 µg/l 4 Mar 2025 |
| Magnesium, Dissolved 0235 | River water | 11 | Dec 2023 – Mar 2025 | 7.8 mg/l 4 Mar 2025 |
| Manganese, Dissolved 6458 | River water | 4 | Oct 2024 – Mar 2025 | 34 µg/l 4 Mar 2025 |
| National Grid Reference : Whole : Field report 7434 | River water | 1 | Dec 2023 – Dec 2023 | 1 unitless value 20 Dec 2023 |
| Nickel 6462 | River water | 4 | Oct 2024 – Mar 2025 | 4.4 µg/l 4 Mar 2025 |
| Nickel, Dissolved 3410 | River water | 11 | Dec 2023 – Mar 2025 | 4.2 µg/l 4 Mar 2025 |
| Nitrite as N 0118 | River water | 25 | Apr 2024 – Apr 2026 | below 0.004 mg/l 13 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Apr 2024 – Apr 2026 | 3.8 mg/l 13 Apr 2026 |
| Potassium, Dissolved 0209 | River water | 4 | Oct 2024 – Mar 2025 | 3.1 mg/l 4 Mar 2025 |
| Sodium, Dissolved 0205 | River water | 4 | Oct 2024 – Mar 2025 | 23 mg/l 4 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 4 | Oct 2024 – Mar 2025 | below 3 mg/l 4 Mar 2025 |
| Strontium, Filtered 6693 | River water | 4 | Oct 2024 – Mar 2025 | 140 µg/l 4 Mar 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 4 | Oct 2024 – Mar 2025 | 24 mg/l 4 Mar 2025 |
| Zinc 6455 | River water | 4 | Oct 2024 – Mar 2025 | 130 µg/l 4 Mar 2025 |
| Zinc, Dissolved 3408 | River water | 11 | Dec 2023 – Mar 2025 | 120 µg/l 4 Mar 2025 |
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.