Holywell Stream at Westland Bridge
EA name: HOLYWELL STREAM AT WESTLAND BRIDGE (also listed as “RSN0359 HOLYWELL STREAM AT WESTLAND BRIDGE”)
Environment Agency sampling point SW-RSN0359 · 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
- 5 Dec 2025, 12:2610 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 10 Jan 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 276273, 130548As published, to the nearest 1 m. Open in a map
- River, by its own name
- Holywell Stream
- River, by the map
- Not placedNearest line is 338 m away and its name does not agree. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.7%
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 98.7 | 98.7% |
| 20 Nov 2025, 14:15 | 90.2 | 90.2% |
| 13 Oct 2025, 11:51 | 98.7 | 98.7% |
| 4 Sep 2025, 13:20 | 100.8 | 100.8% |
| 12 Aug 2025, 11:23 | 93.2 | 93.2% |
| 21 Jul 2025, 11:20 | 96.1 | 96.1% |
| 24 Jun 2025, 12:47 | 98.1 | 98.1% |
| 23 May 2025, 09:58 | 98.7 | 98.7% |
| 7 Apr 2025, 12:19 | 98.5 | 98.5% |
| 3 Mar 2025, 12:49 | 101.3 | 101.3% |
| 6 Feb 2025, 14:34 | 99.4 | 99.4% |
| 14 Jan 2025, 10:59 | 100.2 | 100.2% |
| 11 Dec 2024, 12:30 | 100.7 | 100.7% |
| 27 Nov 2024, 11:58 | 100.1 | 100.1% |
| 7 Oct 2024, 11:51 | 98.7 | 98.7% |
| 9 Sep 2024, 15:33 | 97.5 | 97.5% |
| 2 Aug 2024, 12:12 | 98.2 | 98.2% |
| 2 Jul 2024, 12:19 | 100.5 | 100.5% |
| 5 Jun 2024, 14:23 | 97.5 | 97.5% |
| 7 May 2024, 14:57 | 99.9 | 99.9% |
| 3 Apr 2024, 11:33 | 99.6 | 99.6% |
| 11 Mar 2024, 14:38 | 101.9 | 101.9% |
| 12 Feb 2024, 15:19 | 100.7 | 100.7% |
| 10 Jan 2024, 10:47 | 100.4 | 100.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 11.2 | 11.2 mg/l |
| 20 Nov 2025, 14:15 | 10.5 | 10.5 mg/l |
| 13 Oct 2025, 11:51 | 10.6 | 10.6 mg/l |
| 4 Sep 2025, 13:20 | 10 | 10 mg/l |
| 12 Aug 2025, 11:23 | 8.87 | 8.87 mg/l |
| 21 Jul 2025, 11:20 | 9.42 | 9.42 mg/l |
| 24 Jun 2025, 12:47 | 9.78 | 9.78 mg/l |
| 23 May 2025, 09:58 | 10.1 | 10.1 mg/l |
| 7 Apr 2025, 12:19 | 10.5 | 10.5 mg/l |
| 3 Mar 2025, 12:49 | 11.8 | 11.8 mg/l |
| 6 Feb 2025, 14:34 | 11.7 | 11.7 mg/l |
| 14 Jan 2025, 10:59 | 11.6 | 11.6 mg/l |
| 11 Dec 2024, 12:30 | 11.7 | 11.7 mg/l |
| 27 Nov 2024, 11:58 | 11.3 | 11.3 mg/l |
| 7 Oct 2024, 11:51 | 10.6 | 10.6 mg/l |
| 9 Sep 2024, 15:33 | 9.87 | 9.87 mg/l |
| 2 Aug 2024, 12:12 | 9.21 | 9.21 mg/l |
| 2 Jul 2024, 12:19 | 9.85 | 9.85 mg/l |
| 5 Jun 2024, 14:23 | 9.7 | 9.7 mg/l |
| 7 May 2024, 14:57 | 10 | 10 mg/l |
| 3 Apr 2024, 11:33 | 11.1 | 11.1 mg/l |
| 11 Mar 2024, 14:38 | 11.3 | 11.3 mg/l |
| 12 Feb 2024, 15:19 | 11.4 | 11.4 mg/l |
| 10 Jan 2024, 10:47 | 12.5 | 12.5 mg/l |
Water temperature
code 0076 · °C
9.6 °C
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 9.6 | 9.6 °C |
| 20 Nov 2025, 14:15 | 8.6 | 8.6 °C |
| 13 Oct 2025, 11:51 | 12 | 12 °C |
| 4 Sep 2025, 13:20 | 15.6 | 15.6 °C |
| 12 Aug 2025, 11:23 | 17.6 | 17.6 °C |
| 21 Jul 2025, 11:20 | 16.2 | 16.2 °C |
| 24 Jun 2025, 12:47 | 15.4 | 15.4 °C |
| 23 May 2025, 09:58 | 14.4 | 14.4 °C |
| 7 Apr 2025, 12:19 | 12.3 | 12.3 °C |
| 3 Mar 2025, 12:49 | 8.5 | 8.5 °C |
| 6 Feb 2025, 14:34 | 8.2 | 8.2 °C |
| 14 Jan 2025, 10:59 | 8.9 | 8.9 °C |
| 11 Dec 2024, 12:30 | 8.6 | 8.6 °C |
| 27 Nov 2024, 11:58 | 10 | 10 °C |
| 7 Oct 2024, 11:51 | 12.2 | 12.2 °C |
| 9 Sep 2024, 15:33 | 14.7 | 14.7 °C |
| 2 Aug 2024, 12:12 | 18.3 | 18.3 °C |
| 2 Jul 2024, 12:19 | 16.2 | 16.2 °C |
| 5 Jun 2024, 14:23 | 15.5 | 15.5 °C |
| 7 May 2024, 14:57 | 15 | 15 °C |
| 3 Apr 2024, 11:33 | 10.3 | 10.3 °C |
| 11 Mar 2024, 14:38 | 10.5 | 10.5 °C |
| 12 Feb 2024, 15:19 | 9.8 | 9.8 °C |
| 10 Jan 2024, 10:47 | 5.8 | 5.8 °C |
pH
code 0061
6.48
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 6.48 | 6.48 |
| 20 Nov 2025, 14:15 | 7.14 | 7.14 |
| 13 Oct 2025, 11:51 | 6.79 | 6.79 |
| 4 Sep 2025, 13:20 | 7.5 | 7.5 |
| 12 Aug 2025, 11:23 | 6.53 | 6.53 |
| 21 Jul 2025, 11:20 | 7.07 | 7.07 |
| 24 Jun 2025, 12:47 | 7.2 | 7.2 |
| 23 May 2025, 09:58 | 7.59 | 7.59 |
| 7 Apr 2025, 12:19 | 6.61 | 6.61 |
| 3 Mar 2025, 12:49 | 6.91 | 6.91 |
| 6 Feb 2025, 14:34 | 7.19 | 7.19 |
| 14 Jan 2025, 10:59 | 6.7 | 6.7 |
| 11 Dec 2024, 12:30 | 7.02 | 7.02 |
| 27 Nov 2024, 11:58 | 6.58 | 6.58 |
| 7 Oct 2024, 11:51 | 6.64 | 6.64 |
| 9 Sep 2024, 15:33 | 6.98 | 6.98 |
| 2 Aug 2024, 12:12 | 6.72 | 6.72 |
| 2 Jul 2024, 12:19 | 7.58 | 7.58 |
| 5 Jun 2024, 14:23 | 6.94 | 6.94 |
| 7 May 2024, 14:57 | 6.59 | 6.59 |
| 3 Apr 2024, 11:33 | 6.62 | 6.62 |
| 11 Mar 2024, 14:38 | 6.86 | 6.86 |
| 12 Feb 2024, 15:19 | 6.74 | 6.74 |
| 10 Jan 2024, 10:47 | 6.98 | 6.98 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.01 mg/l
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 0.01 | 0.01 mg/l |
| 20 Nov 2025, 14:15 | 0.0095 | 0.0095 mg/l |
| 13 Oct 2025, 11:51 | <0.002 | below 0.002 mg/l (not detected above this) |
| 4 Sep 2025, 13:20 | 0.0022 | 0.0022 mg/l |
| 12 Aug 2025, 11:23 | <0.002 | below 0.002 mg/l (not detected above this) |
| 21 Jul 2025, 11:20 | 0.0034 | 0.0034 mg/l |
| 24 Jun 2025, 12:47 | 0.018 | 0.018 mg/l |
| 23 May 2025, 09:58 | 0.021 | 0.021 mg/l |
| 7 Apr 2025, 12:19 | 0.0034 | 0.0034 mg/l |
| 3 Mar 2025, 12:49 | 0.0044 | 0.0044 mg/l |
| 6 Feb 2025, 14:34 | 0.0063 | 0.0063 mg/l |
| 14 Jan 2025, 10:59 | 0.0058 | 0.0058 mg/l |
| 11 Dec 2024, 12:30 | 0.0079 | 0.0079 mg/l |
| 27 Nov 2024, 11:58 | 0.0061 | 0.0061 mg/l |
| 7 Oct 2024, 11:51 | 0.0037 | 0.0037 mg/l |
| 9 Sep 2024, 15:33 | 0.007 | 0.007 mg/l |
| 2 Aug 2024, 12:12 | 0.0061 | 0.0061 mg/l |
| 2 Jul 2024, 12:19 | 0.008 | 0.008 mg/l |
| 5 Jun 2024, 14:23 | 0.016 | 0.016 mg/l |
| 7 May 2024, 14:57 | 0.0074 | 0.0074 mg/l |
| 3 Apr 2024, 11:33 | 0.0045 | 0.0045 mg/l |
| 11 Mar 2024, 14:38 | 0.0034 | 0.0034 mg/l |
| 12 Feb 2024, 15:19 | 0.0053 | 0.0053 mg/l |
| 10 Jan 2024, 10:47 | 0.012 | 0.012 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.8 mg/l
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 2.8 | 2.8 mg/l |
| 20 Nov 2025, 14:15 | 2.4 | 2.4 mg/l |
| 13 Oct 2025, 11:51 | 1.8 | 1.8 mg/l |
| 4 Sep 2025, 13:20 | 0.805 | 0.805 mg/l |
| 12 Aug 2025, 11:23 | 1.3 | 1.3 mg/l |
| 21 Jul 2025, 11:20 | 1.4 | 1.4 mg/l |
| 24 Jun 2025, 12:47 | 1.7 | 1.7 mg/l |
| 23 May 2025, 09:58 | 1.4 | 1.4 mg/l |
| 7 Apr 2025, 12:19 | 1.7 | 1.7 mg/l |
| 3 Mar 2025, 12:49 | 2.5 | 2.5 mg/l |
| 6 Feb 2025, 14:34 | 2.4 | 2.4 mg/l |
| 14 Jan 2025, 10:59 | 2.3 | 2.3 mg/l |
| 11 Dec 2024, 12:30 | 2.4 | 2.4 mg/l |
| 27 Nov 2024, 11:58 | 2.4 | 2.4 mg/l |
| 7 Oct 2024, 11:51 | 1.8 | 1.8 mg/l |
| 9 Sep 2024, 15:33 | 1.2 | 1.2 mg/l |
| 2 Aug 2024, 12:12 | 1.3 | 1.3 mg/l |
| 2 Jul 2024, 12:19 | 1.39 | 1.39 mg/l |
| 5 Jun 2024, 14:23 | 1.5 | 1.5 mg/l |
| 7 May 2024, 14:57 | 1.9 | 1.9 mg/l |
| 3 Apr 2024, 11:33 | 2.2 | 2.2 mg/l |
| 11 Mar 2024, 14:38 | 2.1 | 2.1 mg/l |
| 12 Feb 2024, 15:19 | 2.7 | 2.7 mg/l |
| 10 Jan 2024, 10:47 | 2.6 | 2.6 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0034 mg/l
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 0.0034 | 0.0034 mg/l |
| 20 Nov 2025, 14:15 | 0.0026 | 0.0026 mg/l |
| 13 Oct 2025, 11:51 | 0.002 | 0.002 mg/l |
| 4 Sep 2025, 13:20 | 0.0023 | 0.0023 mg/l |
| 12 Aug 2025, 11:23 | 0.007 | 0.007 mg/l |
| 21 Jul 2025, 11:20 | 0.0028 | 0.0028 mg/l |
| 24 Jun 2025, 12:47 | 0.0021 | 0.0021 mg/l |
| 23 May 2025, 09:58 | <0.001 | below 0.001 mg/l (not detected above this) |
| 7 Apr 2025, 12:19 | 0.0034 | 0.0034 mg/l |
| 3 Mar 2025, 12:49 | 0.002 | 0.002 mg/l |
| 6 Feb 2025, 14:34 | 0.0029 | 0.0029 mg/l |
| 14 Jan 2025, 10:59 | 0.0033 | 0.0033 mg/l |
| 11 Dec 2024, 12:30 | 0.0024 | 0.0024 mg/l |
| 27 Nov 2024, 11:58 | 0.0034 | 0.0034 mg/l |
| 7 Oct 2024, 11:51 | 0.0034 | 0.0034 mg/l |
| 9 Sep 2024, 15:33 | 0.0036 | 0.0036 mg/l |
| 2 Aug 2024, 12:12 | 0.0026 | 0.0026 mg/l |
| 2 Jul 2024, 12:19 | 0.0044 | 0.0044 mg/l |
| 5 Jun 2024, 14:23 | 0.0031 | 0.0031 mg/l |
| 7 May 2024, 14:57 | 0.0024 | 0.0024 mg/l |
| 3 Apr 2024, 11:33 | 0.0019 | 0.0019 mg/l |
| 11 Mar 2024, 14:38 | 0.002 | 0.002 mg/l |
| 12 Feb 2024, 15:19 | 0.0029 | 0.0029 mg/l |
| 10 Jan 2024, 10:47 | 0.0033 | 0.0033 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
94 µS/cm
Sampled 5 Dec 2025, 10 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2025, 12:26 | 94 | 94 µS/cm |
| 20 Nov 2025, 14:15 | 88 | 88 µS/cm |
| 13 Oct 2025, 11:51 | 83 | 83 µS/cm |
| 4 Sep 2025, 13:20 | 54 | 54 µS/cm |
| 12 Aug 2025, 11:23 | 85 | 85 µS/cm |
| 21 Jul 2025, 11:20 | 84 | 84 µS/cm |
| 24 Jun 2025, 12:47 | 81 | 81 µS/cm |
| 23 May 2025, 09:58 | 84 | 84 µS/cm |
| 7 Apr 2025, 12:19 | 81 | 81 µS/cm |
| 3 Mar 2025, 12:49 | 86 | 86 µS/cm |
| 6 Feb 2025, 14:34 | 83 | 83 µS/cm |
| 14 Jan 2025, 10:59 | 83 | 83 µS/cm |
| 11 Dec 2024, 12:30 | 82 | 82 µS/cm |
| 27 Nov 2024, 11:58 | 80 | 80 µS/cm |
| 7 Oct 2024, 11:51 | 75 | 75 µS/cm |
| 9 Sep 2024, 15:33 | 74 | 74 µS/cm |
| 2 Aug 2024, 12:12 | 78 | 78 µS/cm |
| 2 Jul 2024, 12:19 | 81 | 81 µS/cm |
| 5 Jun 2024, 14:23 | 81 | 81 µS/cm |
| 7 May 2024, 14:57 | 78 | 78 µS/cm |
| 3 Apr 2024, 11:33 | 80 | 80 µS/cm |
| 11 Mar 2024, 14:38 | 83 | 83 µS/cm |
| 12 Feb 2024, 15:19 | 87 | 87 µS/cm |
| 10 Jan 2024, 10:47 | 87 | 87 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jan 2024 – Dec 2025 | 98.7% 5 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jan 2024 – Dec 2025 | 11.2 mg/l 5 Dec 2025 |
| Temperature of Water 0076 | River water | 24 | Jan 2024 – Dec 2025 | 9.6 °C 5 Dec 2025 |
| pH 0061 | River water | 24 | Jan 2024 – Dec 2025 | 6.48 5 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jan 2024 – Dec 2025 | 0.01 mg/l 5 Dec 2025 |
| Nitrate as N 0117 | River water | 24 | Jan 2024 – Dec 2025 | 2.8 mg/l 5 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jan 2024 – Dec 2025 | 0.0034 mg/l 5 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 24 | Jan 2024 – Dec 2025 | 94 µS/cm 5 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jan 2024 – Dec 2025 | 10 mg/l 5 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jan 2024 – Dec 2025 | below 0.00001 mg/l 5 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 24 | Jan 2024 – Dec 2025 | 1.4 mg/l 5 Dec 2025 |
| Chloride 0172 | River water | 24 | Jan 2024 – Dec 2025 | 12 mg/l 5 Dec 2025 |
| Flow Type 2896 | River water | 18 | Jul 2024 – Dec 2025 | High Flow 5 Dec 2025 |
| Nitrite as N 0118 | River water | 24 | Jan 2024 – Dec 2025 | 0.0014 mg/l 5 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jan 2024 – Dec 2025 | 2.8 mg/l 5 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 23 | Jan 2024 – Dec 2025 | below 0.01 mg/l 5 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 24 | Jan 2024 – Dec 2025 | 3.1 mg/l 5 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | below 3 mg/l 5 Dec 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.