Emmbrook at Merryhill Bridge, Winnersh
EA name: EMMBROOK AT MERRYHILL BRIDGE, WINNERSH
Environment Agency sampling point TH-PLDR0015 · 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
- 1 Jul 2026, 12:543 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 21 since 19 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 478470, 171530As published, to the nearest 10 m. Open in a map
- River, by its own name
- Emmbrook
- River, by the map
- Emm BrookPlaced on the river its name gives, 9 m from the line.
- Next gauge downstream
- Twyford On the River Loddon · 6.7 km along the river
- Nearest gauge upstream
- Wokingham On the Emm Brook · 5.9 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (21 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
81.9%
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 81.9 | 81.9% |
| 12 Jun 2026, 13:26 | 91.4 | 91.4% |
| 26 May 2026, 09:04 | 52.3 | 52.3% |
| 17 Apr 2026, 11:42 | 103.6 | 103.6% |
| 5 Mar 2026, 10:20 | 94.9 | 94.9% |
| 9 Feb 2026, 09:14 | 85.2 | 85.2% |
| 15 Jan 2026, 11:20 | 89.7 | 89.7% |
| 9 Dec 2025, 12:34 | 83.6 | 83.6% |
| 12 Nov 2025, 09:20 | 77.4 | 77.4% |
| 24 Oct 2025, 08:20 | 87.4 | 87.4% |
| 3 Apr 2025, 10:44 | 102.1 | 102.1% |
| 14 Mar 2025, 12:46 | 105.5 | 105.5% |
| 7 Feb 2025, 08:32 | 92.9 | 92.9% |
| 7 Jan 2025, 13:17 | 92.2 | 92.2% |
| 6 Dec 2024, 09:37 | 90.3 | 90.3% |
| 14 Nov 2024, 08:34 | 77.3 | 77.3% |
| 3 Oct 2024, 08:49 | 84.1 | 84.1% |
| 6 Sep 2024, 10:01 | 74.6 | 74.6% |
| 9 Aug 2024, 08:37 | 77.8 | 77.8% |
| 9 Jul 2024, 08:16 | 81.1 | 81.1% |
| 19 Jun 2024, 08:36 | 72.4 | 72.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.49 mg/l
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 7.49 | 7.49 mg/l |
| 12 Jun 2026, 13:26 | 9 | 9 mg/l |
| 26 May 2026, 09:04 | 4.89 | 4.89 mg/l |
| 17 Apr 2026, 11:42 | 10.9 | 10.9 mg/l |
| 5 Mar 2026, 10:20 | 11 | 11 mg/l |
| 9 Feb 2026, 09:14 | 10.1 | 10.1 mg/l |
| 15 Jan 2026, 11:20 | 10.6 | 10.6 mg/l |
| 9 Dec 2025, 12:34 | 9.09 | 9.09 mg/l |
| 12 Nov 2025, 09:20 | 8.1 | 8.1 mg/l |
| 24 Oct 2025, 08:20 | 10.1 | 10.1 mg/l |
| 3 Apr 2025, 10:44 | 11.3 | 11.3 mg/l |
| 14 Mar 2025, 12:46 | 12.7 | 12.7 mg/l |
| 7 Feb 2025, 08:32 | 11.5 | 11.5 mg/l |
| 7 Jan 2025, 13:17 | 11.3 | 11.3 mg/l |
| 6 Dec 2024, 09:37 | 10.5 | 10.5 mg/l |
| 14 Nov 2024, 08:34 | 8.67 | 8.67 mg/l |
| 3 Oct 2024, 08:49 | 9.11 | 9.11 mg/l |
| 6 Sep 2024, 10:01 | 7.15 | 7.15 mg/l |
| 9 Aug 2024, 08:37 | 7.44 | 7.44 mg/l |
| 9 Jul 2024, 08:16 | 8.03 | 8.03 mg/l |
| 19 Jun 2024, 08:36 | 7.3 | 7.3 mg/l |
Water temperature
code 0076 · °C
19.6 °C
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 19.6 | 19.6 °C |
| 12 Jun 2026, 13:26 | 16 | 16 °C |
| 26 May 2026, 09:04 | 18.5 | 18.5 °C |
| 17 Apr 2026, 11:42 | 12.8 | 12.8 °C |
| 5 Mar 2026, 10:20 | 9 | 9 °C |
| 9 Feb 2026, 09:14 | 8.1 | 8.1 °C |
| 15 Jan 2026, 11:20 | 7.9 | 7.9 °C |
| 9 Dec 2025, 12:34 | 11.5 | 11.5 °C |
| 12 Nov 2025, 09:20 | 13.2 | 13.2 °C |
| 24 Oct 2025, 08:20 | 9 | 9 °C |
| 3 Apr 2025, 10:44 | 10.8 | 10.8 °C |
| 14 Mar 2025, 12:46 | 7.2 | 7.2 °C |
| 7 Feb 2025, 08:32 | 6.3 | 6.3 °C |
| 7 Jan 2025, 13:17 | 6.5 | 6.5 °C |
| 6 Dec 2024, 09:37 | 8.5 | 8.5 °C |
| 14 Nov 2024, 08:34 | 10.2 | 10.2 °C |
| 3 Oct 2024, 08:49 | 11.7 | 11.7 °C |
| 6 Sep 2024, 10:01 | 17.3 | 17.3 °C |
| 9 Aug 2024, 08:37 | 17.4 | 17.4 °C |
| 9 Jul 2024, 08:16 | 15.7 | 15.7 °C |
| 19 Jun 2024, 08:36 | 14.9 | 14.9 °C |
pH
code 0061
7.78
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 7.78 | 7.78 |
| 12 Jun 2026, 13:26 | 7.81 | 7.81 |
| 26 May 2026, 09:04 | 7.51 | 7.51 |
| 17 Apr 2026, 11:42 | 7.92 | 7.92 |
| 5 Mar 2026, 10:20 | 7.74 | 7.74 |
| 9 Feb 2026, 09:14 | 7.63 | 7.63 |
| 15 Jan 2026, 11:20 | 7.54 | 7.54 |
| 9 Dec 2025, 12:34 | 7.83 | 7.83 |
| 12 Nov 2025, 09:20 | 7.58 | 7.58 |
| 24 Oct 2025, 08:20 | 7.71 | 7.71 |
| 3 Apr 2025, 10:44 | 7.92 | 7.92 |
| 14 Mar 2025, 12:46 | 8.06 | 8.06 |
| 7 Feb 2025, 08:32 | 7.75 | 7.75 |
| 7 Jan 2025, 13:17 | 7.56 | 7.56 |
| 6 Dec 2024, 09:37 | 7.66 | 7.66 |
| 14 Nov 2024, 08:34 | 7.72 | 7.72 |
| 3 Oct 2024, 08:49 | 7.38 | 7.38 |
| 6 Sep 2024, 10:01 | 7.37 | 7.37 |
| 9 Aug 2024, 08:37 | 7.72 | 7.72 |
| 9 Jul 2024, 08:16 | 7.71 | 7.71 |
| 19 Jun 2024, 08:36 | 7.71 | 7.71 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jun 2026, 13:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 May 2026, 09:04 | 0.12 | 0.12 mg/l |
| 17 Apr 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 10:20 | 0.063 | 0.063 mg/l |
| 9 Feb 2026, 09:14 | 0.32 | 0.32 mg/l |
| 15 Jan 2026, 11:20 | 0.13 | 0.13 mg/l |
| 9 Dec 2025, 12:34 | 0.065 | 0.065 mg/l |
| 12 Nov 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2025, 08:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Mar 2025, 12:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Feb 2025, 08:32 | 0.091 | 0.091 mg/l |
| 7 Jan 2025, 13:17 | 0.078 | 0.078 mg/l |
| 6 Dec 2024, 09:37 | 0.04 | 0.04 mg/l |
| 14 Nov 2024, 08:34 | 0.12 | 0.12 mg/l |
| 3 Oct 2024, 08:49 | 0.04 | 0.04 mg/l |
| 6 Sep 2024, 10:01 | 0.27 | 0.27 mg/l |
| 9 Aug 2024, 08:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2024, 08:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 08:36 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
17 mg/l
Sampled 1 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 17 | 17 mg/l |
| 12 Jun 2026, 13:26 | 9.97 | 9.97 mg/l |
| 26 May 2026, 09:04 | 14.9 | 14.9 mg/l |
| 17 Apr 2026, 11:42 | 9.96 | 9.96 mg/l |
| 5 Mar 2026, 10:20 | 6.25 | 6.25 mg/l |
| 9 Feb 2026, 09:14 | 3.62 | 3.62 mg/l |
| 15 Jan 2026, 11:20 | 5.55 | 5.55 mg/l |
| 9 Dec 2025, 12:34 | 4.43 | 4.43 mg/l |
| 12 Nov 2025, 09:20 | 5.57 | 5.57 mg/l |
| 24 Oct 2025, 08:20 | 6.09 | 6.09 mg/l |
| 14 Mar 2025, 12:46 | 9.25 | 9.25 mg/l |
| 7 Feb 2025, 08:32 | 7.06 | 7.06 mg/l |
| 7 Jan 2025, 13:17 | 3.97 | 3.97 mg/l |
| 6 Dec 2024, 09:37 | 4.16 | 4.16 mg/l |
| 14 Nov 2024, 08:34 | 11.9 | 11.9 mg/l |
| 3 Oct 2024, 08:49 | 4.08 | 4.08 mg/l |
| 6 Sep 2024, 10:01 | 3.27 | 3.27 mg/l |
| 9 Aug 2024, 08:37 | 11 | 11 mg/l |
| 9 Jul 2024, 08:16 | 4.28 | 4.28 mg/l |
| 19 Jun 2024, 08:36 | 18 | 18 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
1.2 mg/l
Sampled 1 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 1.2 | 1.2 mg/l |
| 12 Jun 2026, 13:26 | 0.37 | 0.37 mg/l |
| 26 May 2026, 09:04 | 1.8 | 1.8 mg/l |
| 17 Apr 2026, 11:42 | 0.4 | 0.4 mg/l |
| 5 Mar 2026, 10:20 | 0.49 | 0.49 mg/l |
| 9 Feb 2026, 09:14 | 0.18 | 0.18 mg/l |
| 15 Jan 2026, 11:20 | 0.2 | 0.2 mg/l |
| 9 Dec 2025, 12:34 | 0.19 | 0.19 mg/l |
| 12 Nov 2025, 09:20 | 0.23 | 0.23 mg/l |
| 24 Oct 2025, 08:20 | 0.23 | 0.23 mg/l |
| 14 Mar 2025, 12:46 | 0.49 | 0.49 mg/l |
| 7 Feb 2025, 08:32 | 0.18 | 0.18 mg/l |
| 7 Jan 2025, 13:17 | 0.15 | 0.15 mg/l |
| 6 Dec 2024, 09:37 | 0.17 | 0.17 mg/l |
| 14 Nov 2024, 08:34 | 0.3 | 0.3 mg/l |
| 3 Oct 2024, 08:49 | 0.19 | 0.19 mg/l |
| 6 Sep 2024, 10:01 | 0.23 | 0.23 mg/l |
| 9 Aug 2024, 08:37 | 0.36 | 0.36 mg/l |
| 9 Jul 2024, 08:16 | 0.24 | 0.24 mg/l |
| 19 Jun 2024, 08:36 | 0.49 | 0.49 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1044 µS/cm
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 12:54 | 1044 | 1044 µS/cm |
| 12 Jun 2026, 13:26 | 715 | 715 µS/cm |
| 26 May 2026, 09:04 | 1029 | 1029 µS/cm |
| 17 Apr 2026, 11:42 | 775 | 775 µS/cm |
| 5 Mar 2026, 10:20 | 671 | 671 µS/cm |
| 9 Feb 2026, 09:14 | 523 | 523 µS/cm |
| 15 Jan 2026, 11:20 | 695 | 695 µS/cm |
| 9 Dec 2025, 12:34 | 516 | 516 µS/cm |
| 12 Nov 2025, 09:20 | 570 | 570 µS/cm |
| 24 Oct 2025, 08:20 | 585 | 585 µS/cm |
| 3 Apr 2025, 10:44 | 768 | 768 µS/cm |
| 14 Mar 2025, 12:46 | 747 | 747 µS/cm |
| 7 Feb 2025, 08:32 | 648 | 648 µS/cm |
| 7 Jan 2025, 13:17 | 533 | 533 µS/cm |
| 6 Dec 2024, 09:37 | 529 | 529 µS/cm |
| 14 Nov 2024, 08:34 | 746 | 746 µS/cm |
| 3 Oct 2024, 08:49 | 517 | 517 µS/cm |
| 6 Sep 2024, 10:01 | 292 | 292 µS/cm |
| 9 Aug 2024, 08:37 | 716 | 716 µS/cm |
| 9 Jul 2024, 08:16 | 445 | 445 µS/cm |
| 19 Jun 2024, 08:36 | 1000 | 1000 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 | 21 | Jun 2024 – Jul 2026 | 81.9% 1 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Jun 2024 – Jul 2026 | 7.49 mg/l 1 Jul 2026 |
| Temperature of Water 0076 | River water | 21 | Jun 2024 – Jul 2026 | 19.6 °C 1 Jul 2026 |
| pH 0061 | River water | 21 | Jun 2024 – Jul 2026 | 7.78 1 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Jun 2024 – Jul 2026 | below 0.03 mg/l 1 Jul 2026 |
| Nitrate as N 0117 | River water | 20 | Jun 2024 – Jul 2026 | 17 mg/l 1 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Jun 2024 – Jul 2026 | 1.2 mg/l 1 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Jun 2024 – Jul 2026 | 1044 µS/cm 1 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Jun 2024 – Jul 2026 | 170 mg/l 1 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Jun 2024 – Jul 2026 | below 0.00067 mg/l 1 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 19 | Jun 2024 – Jul 2026 | 1.8 mg/l 1 Jul 2026 |
| Nitrite as N 0118 | River water | 20 | Jun 2024 – Jul 2026 | 0.029 mg/l 1 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Jun 2024 – Jul 2026 | 17 mg/l 1 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.