Bourne (North) at Hamperstone Bridge
EA name: BOURNE ( NORTH ) AT HAMPERSTONE BRIDGE
Environment Agency sampling point TH-PBNR0001 · 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
- 17 Jul 2026, 16:012 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 26 since 27 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 503480, 167250As published, to the nearest 10 m. Open in a map
- River, by its own name
- Bourne
- River, by the map
- The BournePlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Free Prae Road On the Chertsey Bourne · 1.4 km along the river
- Nearest gauge upstream
- Trumps Green On the Chertsey Bourne · 4.8 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (26 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
67.7%
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 67.7 | 67.7% |
| 10 Jun 2026, 13:09 | 71 | 71% |
| 13 May 2026, 10:36 | 64.6 | 64.6% |
| 22 Apr 2026, 10:53 | 78 | 78% |
| 26 Mar 2026, 13:15 | 91 | 91% |
| 17 Feb 2026, 12:16 | 84 | 84% |
| 27 Jan 2026, 11:34 | 85.3 | 85.3% |
| 5 Dec 2025, 11:25 | 84.1 | 84.1% |
| 19 Nov 2025, 12:41 | 84.1 | 84.1% |
| 24 Oct 2025, 12:23 | 89.2 | 89.2% |
| 17 Sep 2025, 11:27 | 66.3 | 66.3% |
| 18 Aug 2025, 09:44 | 60.3 | 60.3% |
| 31 Jul 2025, 09:28 | 51.5 | 51.5% |
| 24 Jun 2025, 10:26 | 47.5 | 47.5% |
| 14 May 2025, 09:41 | 53 | 53% |
| 9 Apr 2025, 11:05 | 78.1 | 78.1% |
| 5 Mar 2025, 12:02 | 94.2 | 94.2% |
| 6 Feb 2025, 10:06 | 87.5 | 87.5% |
| 14 Jan 2025, 09:38 | 91.5 | 91.5% |
| 11 Dec 2024, 10:48 | 84.4 | 84.4% |
| 20 Nov 2024, 11:03 | 91.2 | 91.2% |
| 4 Oct 2024, 12:28 | 86.4 | 86.4% |
| 13 Sep 2024, 09:48 | 77.3 | 77.3% |
| 22 Aug 2024, 09:59 | 59.6 | 59.6% |
| 31 Jul 2024, 13:00 | 64.1 | 64.1% |
| 27 Jun 2024, 11:02 | 51.6 | 51.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.89 mg/l
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 5.89 | 5.89 mg/l |
| 10 Jun 2026, 13:09 | 6.97 | 6.97 mg/l |
| 13 May 2026, 10:36 | 6.85 | 6.85 mg/l |
| 22 Apr 2026, 10:53 | 8.31 | 8.31 mg/l |
| 26 Mar 2026, 13:15 | 10.1 | 10.1 mg/l |
| 17 Feb 2026, 12:16 | 10 | 10 mg/l |
| 27 Jan 2026, 11:34 | 9.94 | 9.94 mg/l |
| 5 Dec 2025, 11:25 | 10.1 | 10.1 mg/l |
| 19 Nov 2025, 12:41 | 9.54 | 9.54 mg/l |
| 24 Oct 2025, 12:23 | 9.68 | 9.68 mg/l |
| 17 Sep 2025, 11:27 | 6.57 | 6.57 mg/l |
| 18 Aug 2025, 09:44 | 5.6 | 5.6 mg/l |
| 31 Jul 2025, 09:28 | 4.77 | 4.77 mg/l |
| 24 Jun 2025, 10:26 | 4.5 | 4.5 mg/l |
| 14 May 2025, 09:41 | 5.27 | 5.27 mg/l |
| 9 Apr 2025, 11:05 | 8.53 | 8.53 mg/l |
| 5 Mar 2025, 12:02 | 11.2 | 11.2 mg/l |
| 6 Feb 2025, 10:06 | 10.9 | 10.9 mg/l |
| 14 Jan 2025, 09:38 | 11.3 | 11.3 mg/l |
| 11 Dec 2024, 10:48 | 9.88 | 9.88 mg/l |
| 20 Nov 2024, 11:03 | 10.7 | 10.7 mg/l |
| 4 Oct 2024, 12:28 | 8.92 | 8.92 mg/l |
| 13 Sep 2024, 09:48 | 8.18 | 8.18 mg/l |
| 22 Aug 2024, 09:59 | 5.75 | 5.75 mg/l |
| 31 Jul 2024, 13:00 | 5.71 | 5.71 mg/l |
| 27 Jun 2024, 11:02 | 4.71 | 4.71 mg/l |
Water temperature
code 0076 · °C
22.1 °C
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 22.1 | 22.1 °C |
| 10 Jun 2026, 13:09 | 16.1 | 16.1 °C |
| 13 May 2026, 10:36 | 12.6 | 12.6 °C |
| 22 Apr 2026, 10:53 | 12.4 | 12.4 °C |
| 26 Mar 2026, 13:15 | 10.8 | 10.8 °C |
| 17 Feb 2026, 12:16 | 7.6 | 7.6 °C |
| 27 Jan 2026, 11:34 | 8.6 | 8.6 °C |
| 5 Dec 2025, 11:25 | 7.5 | 7.5 °C |
| 19 Nov 2025, 12:41 | 9.7 | 9.7 °C |
| 24 Oct 2025, 12:23 | 11.6 | 11.6 °C |
| 17 Sep 2025, 11:27 | 15.7 | 15.7 °C |
| 18 Aug 2025, 09:44 | 18.8 | 18.8 °C |
| 31 Jul 2025, 09:28 | 18.9 | 18.9 °C |
| 24 Jun 2025, 10:26 | 17.8 | 17.8 °C |
| 14 May 2025, 09:41 | 15.5 | 15.5 °C |
| 9 Apr 2025, 11:05 | 11.3 | 11.3 °C |
| 5 Mar 2025, 12:02 | 7.9 | 7.9 °C |
| 6 Feb 2025, 10:06 | 5.9 | 5.9 °C |
| 14 Jan 2025, 09:38 | 6.1 | 6.1 °C |
| 11 Dec 2024, 10:48 | 8.4 | 8.4 °C |
| 20 Nov 2024, 11:03 | 8.3 | 8.3 °C |
| 4 Oct 2024, 12:28 | 13.8 | 13.8 °C |
| 13 Sep 2024, 09:48 | 12.7 | 12.7 °C |
| 22 Aug 2024, 09:59 | 17 | 17 °C |
| 31 Jul 2024, 13:00 | 20.9 | 20.9 °C |
| 27 Jun 2024, 11:02 | 19.7 | 19.7 °C |
pH
code 0061
7.52
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 7.52 | 7.52 |
| 10 Jun 2026, 13:09 | 7.3 | 7.3 |
| 13 May 2026, 10:36 | 7.23 | 7.23 |
| 22 Apr 2026, 10:53 | 7.55 | 7.55 |
| 26 Mar 2026, 13:15 | 7.54 | 7.54 |
| 17 Feb 2026, 12:16 | 7.5 | 7.5 |
| 27 Jan 2026, 11:34 | 7.47 | 7.47 |
| 5 Dec 2025, 11:25 | 7.56 | 7.56 |
| 19 Nov 2025, 12:41 | 7.41 | 7.41 |
| 24 Oct 2025, 12:23 | 7.62 | 7.62 |
| 17 Sep 2025, 11:27 | 7.3 | 7.3 |
| 18 Aug 2025, 09:44 | 7.29 | 7.29 |
| 31 Jul 2025, 09:28 | 7.33 | 7.33 |
| 24 Jun 2025, 10:26 | 7.39 | 7.39 |
| 14 May 2025, 09:41 | 7.23 | 7.23 |
| 9 Apr 2025, 11:05 | 7.33 | 7.33 |
| 5 Mar 2025, 12:02 | 7.59 | 7.59 |
| 6 Feb 2025, 10:06 | 7.44 | 7.44 |
| 14 Jan 2025, 09:38 | 7.62 | 7.62 |
| 11 Dec 2024, 10:48 | 7.53 | 7.53 |
| 20 Nov 2024, 11:03 | 7.47 | 7.47 |
| 4 Oct 2024, 12:28 | 7.37 | 7.37 |
| 13 Sep 2024, 09:48 | 7.43 | 7.43 |
| 22 Aug 2024, 09:59 | 7.24 | 7.24 |
| 31 Jul 2024, 13:00 | 7.35 | 7.35 |
| 27 Jun 2024, 11:02 | 7.23 | 7.23 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.14 mg/l
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 0.14 | 0.14 mg/l |
| 10 Jun 2026, 13:09 | 0.22 | 0.22 mg/l |
| 13 May 2026, 10:36 | 0.3 | 0.3 mg/l |
| 22 Apr 2026, 10:53 | 0.25 | 0.25 mg/l |
| 26 Mar 2026, 13:15 | 0.22 | 0.22 mg/l |
| 17 Feb 2026, 12:16 | 0.65 | 0.65 mg/l |
| 27 Jan 2026, 11:34 | 1.6 | 1.6 mg/l |
| 5 Dec 2025, 11:25 | 0.25 | 0.25 mg/l |
| 19 Nov 2025, 12:41 | 0.21 | 0.21 mg/l |
| 24 Oct 2025, 12:23 | 0.14 | 0.14 mg/l |
| 17 Sep 2025, 11:27 | 0.24 | 0.24 mg/l |
| 18 Aug 2025, 09:44 | 0.15 | 0.15 mg/l |
| 31 Jul 2025, 09:28 | 0.31 | 0.31 mg/l |
| 24 Jun 2025, 10:26 | 1.1 | 1.1 mg/l |
| 14 May 2025, 09:41 | 0.69 | 0.69 mg/l |
| 9 Apr 2025, 11:05 | 0.2 | 0.2 mg/l |
| 5 Mar 2025, 12:02 | 0.31 | 0.31 mg/l |
| 6 Feb 2025, 10:06 | 0.36 | 0.36 mg/l |
| 14 Jan 2025, 09:38 | 0.17 | 0.17 mg/l |
| 11 Dec 2024, 10:48 | 0.14 | 0.14 mg/l |
| 20 Nov 2024, 11:03 | 0.19 | 0.19 mg/l |
| 4 Oct 2024, 12:28 | 0.64 | 0.64 mg/l |
| 13 Sep 2024, 09:48 | 0.16 | 0.16 mg/l |
| 22 Aug 2024, 09:59 | 0.24 | 0.24 mg/l |
| 31 Jul 2024, 13:00 | 0.24 | 0.24 mg/l |
| 27 Jun 2024, 11:02 | 0.24 | 0.24 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
28.8 mg/l
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 28.8 | 28.8 mg/l |
| 10 Jun 2026, 13:09 | 18.8 | 18.8 mg/l |
| 13 May 2026, 10:36 | 17.8 | 17.8 mg/l |
| 22 Apr 2026, 10:53 | 17.8 | 17.8 mg/l |
| 26 Mar 2026, 13:15 | 16.9 | 16.9 mg/l |
| 17 Feb 2026, 12:16 | 5.03 | 5.03 mg/l |
| 27 Jan 2026, 11:34 | 6.19 | 6.19 mg/l |
| 5 Dec 2025, 11:25 | 12.9 | 12.9 mg/l |
| 19 Nov 2025, 12:41 | 19.9 | 19.9 mg/l |
| 24 Oct 2025, 12:23 | 10.9 | 10.9 mg/l |
| 17 Sep 2025, 11:27 | 18.7 | 18.7 mg/l |
| 18 Aug 2025, 09:44 | 28.8 | 28.8 mg/l |
| 31 Jul 2025, 09:28 | 23.6 | 23.6 mg/l |
| 24 Jun 2025, 10:26 | 21.5 | 21.5 mg/l |
| 14 May 2025, 09:41 | 19.6 | 19.6 mg/l |
| 9 Apr 2025, 11:05 | 18.9 | 18.9 mg/l |
| 5 Mar 2025, 12:02 | 10.9 | 10.9 mg/l |
| 6 Feb 2025, 10:06 | 7.82 | 7.82 mg/l |
| 14 Jan 2025, 09:38 | 7.25 | 7.25 mg/l |
| 11 Dec 2024, 10:48 | 9.93 | 9.93 mg/l |
| 20 Nov 2024, 11:03 | 8.44 | 8.44 mg/l |
| 4 Oct 2024, 12:28 | 10.8 | 10.8 mg/l |
| 13 Sep 2024, 09:48 | 16.9 | 16.9 mg/l |
| 22 Aug 2024, 09:59 | 23.7 | 23.7 mg/l |
| 31 Jul 2024, 13:00 | 26.8 | 26.8 mg/l |
| 27 Jun 2024, 11:02 | 23.8 | 23.8 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.92 mg/l
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 0.92 | 0.92 mg/l |
| 10 Jun 2026, 13:09 | 0.46 | 0.46 mg/l |
| 13 May 2026, 10:36 | 0.45 | 0.45 mg/l |
| 22 Apr 2026, 10:53 | 0.39 | 0.39 mg/l |
| 26 Mar 2026, 13:15 | 0.22 | 0.22 mg/l |
| 17 Feb 2026, 12:16 | 0.14 | 0.14 mg/l |
| 27 Jan 2026, 11:34 | 0.24 | 0.24 mg/l |
| 5 Dec 2025, 11:25 | 0.25 | 0.25 mg/l |
| 19 Nov 2025, 12:41 | 0.42 | 0.42 mg/l |
| 24 Oct 2025, 12:23 | 0.22 | 0.22 mg/l |
| 17 Sep 2025, 11:27 | 0.43 | 0.43 mg/l |
| 18 Aug 2025, 09:44 | 0.25 | 0.25 mg/l |
| 31 Jul 2025, 09:28 | 0.31 | 0.31 mg/l |
| 24 Jun 2025, 10:26 | 1.8 | 1.8 mg/l |
| 14 May 2025, 09:41 | 0.64 | 0.64 mg/l |
| 9 Apr 2025, 11:05 | 0.29 | 0.29 mg/l |
| 5 Mar 2025, 12:02 | 0.3 | 0.3 mg/l |
| 6 Feb 2025, 10:06 | 0.21 | 0.21 mg/l |
| 14 Jan 2025, 09:38 | 0.14 | 0.14 mg/l |
| 11 Dec 2024, 10:48 | 0.16 | 0.16 mg/l |
| 20 Nov 2024, 11:03 | 0.21 | 0.21 mg/l |
| 4 Oct 2024, 12:28 | 0.3 | 0.3 mg/l |
| 13 Sep 2024, 09:48 | 0.35 | 0.35 mg/l |
| 22 Aug 2024, 09:59 | 0.48 | 0.48 mg/l |
| 31 Jul 2024, 13:00 | 1.1 | 1.1 mg/l |
| 27 Jun 2024, 11:02 | 0.79 | 0.79 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1079 µS/cm
Sampled 17 Jul 2026, 2 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Jul 2026, 16:01 | 1079 | 1079 µS/cm |
| 10 Jun 2026, 13:09 | 815 | 815 µS/cm |
| 13 May 2026, 10:36 | 823 | 823 µS/cm |
| 22 Apr 2026, 10:53 | 775 | 775 µS/cm |
| 26 Mar 2026, 13:15 | 753 | 753 µS/cm |
| 17 Feb 2026, 12:16 | 548 | 548 µS/cm |
| 27 Jan 2026, 11:34 | 618 | 618 µS/cm |
| 5 Dec 2025, 11:25 | 662 | 662 µS/cm |
| 19 Nov 2025, 12:41 | 849 | 849 µS/cm |
| 24 Oct 2025, 12:23 | 618 | 618 µS/cm |
| 17 Sep 2025, 11:27 | 793 | 793 µS/cm |
| 18 Aug 2025, 09:44 | 968 | 968 µS/cm |
| 31 Jul 2025, 09:28 | 963 | 963 µS/cm |
| 24 Jun 2025, 10:26 | 943 | 943 µS/cm |
| 14 May 2025, 09:41 | 792 | 792 µS/cm |
| 9 Apr 2025, 11:05 | 744 | 744 µS/cm |
| 5 Mar 2025, 12:02 | 637 | 637 µS/cm |
| 6 Feb 2025, 10:06 | 598 | 598 µS/cm |
| 14 Jan 2025, 09:38 | 606 | 606 µS/cm |
| 11 Dec 2024, 10:48 | 596 | 596 µS/cm |
| 20 Nov 2024, 11:03 | 491 | 491 µS/cm |
| 4 Oct 2024, 12:28 | 589 | 589 µS/cm |
| 13 Sep 2024, 09:48 | 722 | 722 µS/cm |
| 22 Aug 2024, 09:59 | 875 | 875 µS/cm |
| 31 Jul 2024, 13:00 | 956 | 956 µS/cm |
| 27 Jun 2024, 11:02 | 876 | 876 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 | 26 | Jun 2024 – Jul 2026 | 67.7% 17 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Jun 2024 – Jul 2026 | 5.89 mg/l 17 Jul 2026 |
| Temperature of Water 0076 | River water | 26 | Jun 2024 – Jul 2026 | 22.1 °C 17 Jul 2026 |
| pH 0061 | River water | 26 | Jun 2024 – Jul 2026 | 7.52 17 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – Jul 2026 | 0.14 mg/l 17 Jul 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Jul 2026 | 28.8 mg/l 17 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – Jul 2026 | 0.92 mg/l 17 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Jun 2024 – Jul 2026 | 1079 µS/cm 17 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – Jul 2026 | 140 mg/l 17 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – Jul 2026 | 0.00209 mg/l 17 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – Mar 2026 | below 4 mg/l 26 Mar 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – Jul 2026 | 0.17 mg/l 17 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – Jul 2026 | 29 mg/l 17 Jul 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.