Monks Brook Swaythling
EA name: MONKS BRK SWAYTHLING (also listed as “MONKS BROOK AT SWAYTHLING”)
Environment Agency sampling point SO-G0003827 · 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
- 7 May 2026, 11:165 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
- 24 since 16 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 444051, 116043As published, to the nearest 1 m. Open in a map
- River, by its own name
- Monks Brook
- River, by the map
- Monks BrookPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Woolston On the Tide · 7.9 km along the river
- Nearest gauge upstream
- Stoneham Lane On the Monks Brook · 1.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.8%
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 89.8 | 89.8% |
| 8 Apr 2026, 11:53 | 100.3 | 100.3% |
| 2 Mar 2026, 12:15 | 91.7 | 91.7% |
| 13 Feb 2026, 11:34 | 96 | 96% |
| 14 Jan 2026, 10:27 | 97.1 | 97.1% |
| 10 Dec 2025, 11:57 | 93.2 | 93.2% |
| 3 Mar 2025, 11:51 | 96.7 | 96.7% |
| 7 Feb 2025, 14:40 | 95.7 | 95.7% |
| 23 Jan 2025, 08:59 | 92.4 | 92.4% |
| 11 Dec 2024, 08:21 | 91.9 | 91.9% |
| 18 Nov 2024, 10:51 | 89.8 | 89.8% |
| 15 Oct 2024, 12:15 | 92.3 | 92.3% |
| 16 Sep 2024, 11:23 | 87.6 | 87.6% |
| 21 Aug 2024, 09:50 | 76.7 | 76.7% |
| 19 Jul 2024, 12:16 | 86.2 | 86.2% |
| 17 Jun 2024, 10:30 | 81.1 | 81.1% |
| 14 May 2024, 13:20 | 92.3 | 92.3% |
| 18 Apr 2024, 17:48 | 112 | 112% |
| 22 Mar 2024, 13:31 | 97.1 | 97.1% |
| 20 Feb 2024, 12:46 | 96.7 | 96.7% |
| 18 Jan 2024, 10:50 | 92.4 | 92.4% |
| 6 Dec 2023, 10:15 | 95.7 | 95.7% |
| 21 Nov 2023, 09:23 | 91.9 | 91.9% |
| 16 Oct 2023, 11:27 | 92 | 92% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.52 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 9.52 | 9.52 mg/l |
| 8 Apr 2026, 11:53 | 10.7 | 10.7 mg/l |
| 2 Mar 2026, 12:15 | 10.3 | 10.3 mg/l |
| 13 Feb 2026, 11:34 | 11.2 | 11.2 mg/l |
| 14 Jan 2026, 10:27 | 12.1 | 12.1 mg/l |
| 10 Dec 2025, 11:57 | 10.4 | 10.4 mg/l |
| 3 Mar 2025, 11:51 | 12 | 12 mg/l |
| 7 Feb 2025, 14:40 | 11.9 | 11.9 mg/l |
| 23 Jan 2025, 08:59 | 11.6 | 11.6 mg/l |
| 11 Dec 2024, 08:21 | 10.9 | 10.9 mg/l |
| 18 Nov 2024, 10:51 | 10.1 | 10.1 mg/l |
| 15 Oct 2024, 12:15 | 9.64 | 9.64 mg/l |
| 16 Sep 2024, 11:23 | 8.77 | 8.77 mg/l |
| 21 Aug 2024, 09:50 | 7.68 | 7.68 mg/l |
| 19 Jul 2024, 12:16 | 7.94 | 7.94 mg/l |
| 17 Jun 2024, 10:30 | 8.39 | 8.39 mg/l |
| 14 May 2024, 13:20 | 9.38 | 9.38 mg/l |
| 18 Apr 2024, 17:48 | 12 | 12 mg/l |
| 22 Mar 2024, 13:31 | 10.6 | 10.6 mg/l |
| 20 Feb 2024, 12:46 | 11 | 11 mg/l |
| 18 Jan 2024, 10:50 | 12.4 | 12.4 mg/l |
| 6 Dec 2023, 10:15 | 11.7 | 11.7 mg/l |
| 21 Nov 2023, 09:23 | 10.2 | 10.2 mg/l |
| 16 Oct 2023, 11:27 | 10.4 | 10.4 mg/l |
Water temperature
code 0076 · °C
12.6 °C
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 12.6 | 12.6 °C |
| 8 Apr 2026, 11:53 | 12.5 | 12.5 °C |
| 2 Mar 2026, 12:15 | 10.3 | 10.3 °C |
| 13 Feb 2026, 11:34 | 8.5 | 8.5 °C |
| 14 Jan 2026, 10:27 | 6 | 6 °C |
| 10 Dec 2025, 11:57 | 10.3 | 10.3 °C |
| 3 Mar 2025, 11:51 | 6.1 | 6.1 °C |
| 7 Feb 2025, 14:40 | 6 | 6 °C |
| 23 Jan 2025, 08:59 | 5.6 | 5.6 °C |
| 11 Dec 2024, 08:21 | 7.9 | 7.9 °C |
| 18 Nov 2024, 10:51 | 10.1 | 10.1 °C |
| 15 Oct 2024, 12:15 | 13.3 | 13.3 °C |
| 16 Sep 2024, 11:23 | 15.2 | 15.2 °C |
| 21 Aug 2024, 09:50 | 15.2 | 15.2 °C |
| 19 Jul 2024, 12:16 | 19.2 | 19.2 °C |
| 17 Jun 2024, 10:30 | 13.7 | 13.7 °C |
| 14 May 2024, 13:20 | 14.5 | 14.5 °C |
| 18 Apr 2024, 17:48 | 12.1 | 12.1 °C |
| 22 Mar 2024, 13:31 | 11.3 | 11.3 °C |
| 20 Feb 2024, 12:46 | 9.7 | 9.7 °C |
| 18 Jan 2024, 10:50 | 3 | 3 °C |
| 6 Dec 2023, 10:15 | 6.8 | 6.8 °C |
| 21 Nov 2023, 09:23 | 10.8 | 10.8 °C |
| 16 Oct 2023, 11:27 | 9.8 | 9.8 °C |
pH
code 0061
7.6
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 7.6 | 7.6 |
| 8 Apr 2026, 11:53 | 7.71 | 7.71 |
| 2 Mar 2026, 12:15 | 7.64 | 7.64 |
| 13 Feb 2026, 11:34 | 7.51 | 7.51 |
| 14 Jan 2026, 10:27 | 7.45 | 7.45 |
| 10 Dec 2025, 11:57 | 7.93 | 7.93 |
| 3 Mar 2025, 11:51 | 7.62 | 7.62 |
| 7 Feb 2025, 14:40 | 7.59 | 7.59 |
| 23 Jan 2025, 08:59 | 7.65 | 7.65 |
| 11 Dec 2024, 08:21 | 7.62 | 7.62 |
| 18 Nov 2024, 10:51 | 7.66 | 7.66 |
| 15 Oct 2024, 12:15 | 7.86 | 7.86 |
| 16 Sep 2024, 11:23 | 7.81 | 7.81 |
| 21 Aug 2024, 09:50 | 7.78 | 7.78 |
| 19 Jul 2024, 12:16 | 7.71 | 7.71 |
| 17 Jun 2024, 10:30 | 7.6 | 7.6 |
| 14 May 2024, 13:20 | 7.65 | 7.65 |
| 18 Apr 2024, 17:48 | 8.14 | 8.14 |
| 22 Mar 2024, 13:31 | 7.69 | 7.69 |
| 20 Feb 2024, 12:46 | 7.53 | 7.53 |
| 18 Jan 2024, 10:50 | 7.74 | 7.74 |
| 6 Dec 2023, 10:15 | 7.75 | 7.75 |
| 21 Nov 2023, 09:23 | 7.59 | 7.59 |
| 16 Oct 2023, 11:27 | 7.71 | 7.71 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.052 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 0.052 | 0.052 mg/l |
| 8 Apr 2026, 11:53 | 0.053 | 0.053 mg/l |
| 2 Mar 2026, 12:15 | 0.32 | 0.32 mg/l |
| 13 Feb 2026, 11:34 | 0.19 | 0.19 mg/l |
| 14 Jan 2026, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2025, 11:57 | 0.035 | 0.035 mg/l |
| 3 Mar 2025, 11:51 | 0.036 | 0.036 mg/l |
| 7 Feb 2025, 14:40 | 0.042 | 0.042 mg/l |
| 23 Jan 2025, 08:59 | 0.038 | 0.038 mg/l |
| 11 Dec 2024, 08:21 | 0.041 | 0.041 mg/l |
| 18 Nov 2024, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Oct 2024, 12:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2024, 09:50 | 0.075 | 0.075 mg/l |
| 19 Jul 2024, 12:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 10:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2024, 13:20 | 0.045 | 0.045 mg/l |
| 18 Apr 2024, 17:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Mar 2024, 13:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2024, 12:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jan 2024, 10:50 | 0.063 | 0.063 mg/l |
| 6 Dec 2023, 10:15 | 0.044 | 0.044 mg/l |
| 21 Nov 2023, 09:23 | 0.036 | 0.036 mg/l |
| 16 Oct 2023, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.48 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 1.48 | 1.48 mg/l |
| 8 Apr 2026, 11:53 | 1.38 | 1.38 mg/l |
| 2 Mar 2026, 12:15 | 1.28 | 1.28 mg/l |
| 13 Feb 2026, 11:34 | 1.39 | 1.39 mg/l |
| 14 Jan 2026, 10:27 | 1.5 | 1.5 mg/l |
| 10 Dec 2025, 11:57 | 1.79 | 1.79 mg/l |
| 3 Mar 2025, 11:51 | 1.39 | 1.39 mg/l |
| 7 Feb 2025, 14:40 | 1.39 | 1.39 mg/l |
| 23 Jan 2025, 08:59 | 1.59 | 1.59 mg/l |
| 11 Dec 2024, 08:21 | 1.29 | 1.29 mg/l |
| 18 Nov 2024, 10:51 | 0.845 | 0.845 mg/l |
| 15 Oct 2024, 12:15 | 1.09 | 1.09 mg/l |
| 16 Sep 2024, 11:23 | 1.8 | 1.8 mg/l |
| 21 Aug 2024, 09:50 | 1.67 | 1.67 mg/l |
| 19 Jul 2024, 12:16 | 1.59 | 1.59 mg/l |
| 17 Jun 2024, 10:30 | 1.59 | 1.59 mg/l |
| 14 May 2024, 13:20 | 0.905 | 0.905 mg/l |
| 18 Apr 2024, 17:48 | 1.19 | 1.19 mg/l |
| 22 Mar 2024, 13:31 | 1.09 | 1.09 mg/l |
| 20 Feb 2024, 12:46 | 1.29 | 1.29 mg/l |
| 18 Jan 2024, 10:50 | 1.49 | 1.49 mg/l |
| 6 Dec 2023, 10:15 | 1.19 | 1.19 mg/l |
| 21 Nov 2023, 09:23 | 1.19 | 1.19 mg/l |
| 16 Oct 2023, 11:27 | 1.6 | 1.6 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.078 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 0.078 | 0.078 mg/l |
| 8 Apr 2026, 11:53 | 0.046 | 0.046 mg/l |
| 2 Mar 2026, 12:15 | 0.066 | 0.066 mg/l |
| 13 Feb 2026, 11:34 | 0.059 | 0.059 mg/l |
| 14 Jan 2026, 10:27 | 0.039 | 0.039 mg/l |
| 10 Dec 2025, 11:57 | 0.048 | 0.048 mg/l |
| 3 Mar 2025, 11:51 | 0.038 | 0.038 mg/l |
| 7 Feb 2025, 14:40 | 0.044 | 0.044 mg/l |
| 23 Jan 2025, 08:59 | 0.048 | 0.048 mg/l |
| 11 Dec 2024, 08:21 | 0.042 | 0.042 mg/l |
| 18 Nov 2024, 10:51 | 0.053 | 0.053 mg/l |
| 15 Oct 2024, 12:15 | 0.055 | 0.055 mg/l |
| 16 Sep 2024, 11:23 | 0.072 | 0.072 mg/l |
| 21 Aug 2024, 09:50 | 0.11 | 0.11 mg/l |
| 19 Jul 2024, 12:16 | 0.056 | 0.056 mg/l |
| 17 Jun 2024, 10:30 | 0.06 | 0.06 mg/l |
| 14 May 2024, 13:20 | 0.054 | 0.054 mg/l |
| 18 Apr 2024, 17:48 | 0.039 | 0.039 mg/l |
| 22 Mar 2024, 13:31 | 0.035 | 0.035 mg/l |
| 20 Feb 2024, 12:46 | 0.037 | 0.037 mg/l |
| 18 Jan 2024, 10:50 | 0.047 | 0.047 mg/l |
| 6 Dec 2023, 10:15 | 0.049 | 0.049 mg/l |
| 21 Nov 2023, 09:23 | 0.047 | 0.047 mg/l |
| 16 Oct 2023, 11:27 | 0.066 | 0.066 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
495 µS/cm
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 11:16 | 495 | 495 µS/cm |
| 8 Apr 2026, 11:53 | 473 | 473 µS/cm |
| 2 Mar 2026, 12:15 | 401 | 401 µS/cm |
| 13 Feb 2026, 11:34 | 367 | 367 µS/cm |
| 14 Jan 2026, 10:27 | 393 | 393 µS/cm |
| 10 Dec 2025, 11:57 | 404 | 404 µS/cm |
| 3 Mar 2025, 11:51 | 415 | 415 µS/cm |
| 7 Feb 2025, 14:40 | 423 | 423 µS/cm |
| 23 Jan 2025, 08:59 | 463 | 463 µS/cm |
| 11 Dec 2024, 08:21 | 396 | 396 µS/cm |
| 18 Nov 2024, 10:51 | 261 | 261 µS/cm |
| 15 Oct 2024, 12:15 | 338 | 338 µS/cm |
| 16 Sep 2024, 11:23 | 527 | 527 µS/cm |
| 21 Aug 2024, 09:50 | 513 | 513 µS/cm |
| 19 Jul 2024, 12:16 | 498 | 498 µS/cm |
| 17 Jun 2024, 10:30 | 460 | 460 µS/cm |
| 14 May 2024, 13:20 | 202 | 202 µS/cm |
| 18 Apr 2024, 17:48 | 452 | 452 µS/cm |
| 22 Mar 2024, 13:31 | 431 | 431 µS/cm |
| 20 Feb 2024, 12:46 | 395 | 395 µS/cm |
| 18 Jan 2024, 10:50 | 459 | 459 µS/cm |
| 6 Dec 2023, 10:15 | 398 | 398 µS/cm |
| 21 Nov 2023, 09:23 | 382 | 382 µS/cm |
| 16 Oct 2023, 11:27 | 503 | 503 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 | 24 | Oct 2023 – May 2026 | 89.8% 7 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – May 2026 | 9.52 mg/l 7 May 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – May 2026 | 12.6 °C 7 May 2026 |
| pH 0061 | River water | 24 | Oct 2023 – May 2026 | 7.6 7 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Oct 2023 – May 2026 | 0.052 mg/l 7 May 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – May 2026 | 1.48 mg/l 7 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – May 2026 | 0.078 mg/l 7 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – May 2026 | 495 µS/cm 7 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – May 2026 | 120 mg/l 7 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Oct 2023 – May 2026 | 0.00046 mg/l 7 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Feb 2024 – May 2026 | 1.5 mg/l 7 May 2026 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – May 2026 | 0.025 mg/l 7 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – May 2026 | 1.5 mg/l 7 May 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.