Yeading Brook East above Priors Farm, Ruislip
EA name: YEADING BROOK EAST ABOVE PRIORS FARM, RU (also listed as “YEADING BROOK EAST ABOVE PRIORS FARM, RUISLIP”)
Environment Agency sampling point TH-PCRR0063 · 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 Aug 2026, 11:2457 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 20 since 24 Oct 2023 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 511306, 184730As published, to the nearest 1 m. Open in a map
- River, by its own name
- Yeading Brook East
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 3 m from the line.
- Next gauge downstream
- Northholt, Yeading East On the Yeading Brook (Eastern Arm) · 0.2 km along the river
- Nearest gauge upstream
- Harrow, Thistledene Avenue On the Roxbourne · 1.9 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (14 samples)
Monitoring (national agency policy) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
69.6%
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 69.6 | 69.6% |
| 6 Jul 2026, 12:22 | 57.3 | 57.3% |
| 10 Jun 2026, 10:08 | 58.8 | 58.8% |
| 20 May 2026, 11:44 | 35.3 | 35.3% |
| 5 May 2026, 10:28 | 59.6 | 59.6% |
| 15 Apr 2026, 11:53 | 58.1 | 58.1% |
| 9 Apr 2026, 10:43 | 47.2 | 47.2% |
| 5 Mar 2026, 12:11 | 67.3 | 67.3% |
| 2 Feb 2026, 13:18 | 72.5 | 72.5% |
| 7 Jan 2026, 12:22 | 77.9 | 77.9% |
| 2 Dec 2025, 10:34 | 65.8 | 65.8% |
| 5 Nov 2025, 11:32 | 27.9 | 27.9% |
| 3 Oct 2025, 11:46 | 58.5 | 58.5% |
| 1 Sep 2025, 14:01 | 38.1 | 38.1% |
| 1 Aug 2025, 11:42 | 54.2 | 54.2% |
| 1 Jul 2025, 10:01 | 40.2 | 40.2% |
| 11 Jun 2025, 11:10 | 52.1 | 52.1% |
| 21 May 2025, 10:58 | 51.7 | 51.7% |
| 8 Apr 2025, 11:44 | 57.3 | 57.3% |
| 24 Oct 2023, 10:36 | 67.2 | 67.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.29 mg/l
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 6.29 | 6.29 mg/l |
| 6 Jul 2026, 12:22 | 5.15 | 5.15 mg/l |
| 10 Jun 2026, 10:08 | 5.95 | 5.95 mg/l |
| 20 May 2026, 11:44 | 3.6 | 3.6 mg/l |
| 5 May 2026, 10:28 | 6.22 | 6.22 mg/l |
| 15 Apr 2026, 11:53 | 6.23 | 6.23 mg/l |
| 9 Apr 2026, 10:43 | 4.97 | 4.97 mg/l |
| 5 Mar 2026, 12:11 | 7.69 | 7.69 mg/l |
| 2 Feb 2026, 13:18 | 8.37 | 8.37 mg/l |
| 7 Jan 2026, 12:22 | 9.86 | 9.86 mg/l |
| 2 Dec 2025, 10:34 | 7.57 | 7.57 mg/l |
| 5 Nov 2025, 11:32 | 2.89 | 2.89 mg/l |
| 3 Oct 2025, 11:46 | 6 | 6 mg/l |
| 1 Sep 2025, 14:01 | 3.65 | 3.65 mg/l |
| 1 Aug 2025, 11:42 | 5.32 | 5.32 mg/l |
| 1 Jul 2025, 10:01 | 3.56 | 3.56 mg/l |
| 11 Jun 2025, 11:10 | 5.16 | 5.16 mg/l |
| 21 May 2025, 10:58 | 5.07 | 5.07 mg/l |
| 8 Apr 2025, 11:44 | 6.55 | 6.55 mg/l |
| 24 Oct 2023, 10:36 | 6.95 | 6.95 mg/l |
Water temperature
code 0076 · °C
20.2 °C
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 20.2 | 20.2 °C |
| 6 Jul 2026, 12:22 | 20.5 | 20.5 °C |
| 10 Jun 2026, 10:08 | 14.7 | 14.7 °C |
| 20 May 2026, 11:44 | 14.3 | 14.3 °C |
| 5 May 2026, 10:28 | 13.3 | 13.3 °C |
| 15 Apr 2026, 11:53 | 12.1 | 12.1 °C |
| 9 Apr 2026, 10:43 | 12.9 | 12.9 °C |
| 5 Mar 2026, 12:11 | 9.4 | 9.4 °C |
| 2 Feb 2026, 13:18 | 9 | 9 °C |
| 7 Jan 2026, 12:22 | 5.3 | 5.3 °C |
| 2 Dec 2025, 10:34 | 9.1 | 9.1 °C |
| 5 Nov 2025, 11:32 | 13.7 | 13.7 °C |
| 3 Oct 2025, 11:46 | 14.1 | 14.1 °C |
| 1 Sep 2025, 14:01 | 17.3 | 17.3 °C |
| 1 Aug 2025, 11:42 | 16.1 | 16.1 °C |
| 1 Jul 2025, 10:01 | 21.2 | 21.2 °C |
| 11 Jun 2025, 11:10 | 15.7 | 15.7 °C |
| 21 May 2025, 10:58 | 16.2 | 16.2 °C |
| 8 Apr 2025, 11:44 | 9.4 | 9.4 °C |
| 24 Oct 2023, 10:36 | 13.7 | 13.7 °C |
pH
code 0061
7.81
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 7.81 | 7.81 |
| 6 Jul 2026, 12:22 | 7.86 | 7.86 |
| 10 Jun 2026, 10:08 | 8.99 | 8.99 |
| 20 May 2026, 11:44 | 7.63 | 7.63 |
| 5 May 2026, 10:28 | 8.07 | 8.07 |
| 15 Apr 2026, 11:53 | 7.77 | 7.77 |
| 9 Apr 2026, 10:43 | 7.66 | 7.66 |
| 5 Mar 2026, 12:11 | 8.26 | 8.26 |
| 2 Feb 2026, 13:18 | 7.78 | 7.78 |
| 7 Jan 2026, 12:22 | 7.67 | 7.67 |
| 2 Dec 2025, 10:34 | 7.88 | 7.88 |
| 5 Nov 2025, 11:32 | 7.71 | 7.71 |
| 3 Oct 2025, 11:46 | 7.63 | 7.63 |
| 1 Sep 2025, 14:01 | 8.11 | 8.11 |
| 1 Aug 2025, 11:42 | 7.63 | 7.63 |
| 1 Jul 2025, 10:01 | 7.68 | 7.68 |
| 11 Jun 2025, 11:10 | 8.13 | 8.13 |
| 21 May 2025, 10:58 | 7.91 | 7.91 |
| 8 Apr 2025, 11:44 | 7.99 | 7.99 |
| 24 Oct 2023, 10:36 | 7.52 | 7.52 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
4.8 mg/l
Sampled 6 Jul 2026, 3 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jul 2026, 12:22 | 4.8 | 4.8 mg/l |
| 10 Jun 2026, 10:08 | 0.091 | 0.091 mg/l |
| 20 May 2026, 11:44 | 3.7 | 3.7 mg/l |
| 5 May 2026, 10:28 | 1.1 | 1.1 mg/l |
| 15 Apr 2026, 11:53 | 0.12 | 0.12 mg/l |
| 9 Apr 2026, 10:43 | 0.33 | 0.33 mg/l |
| 5 Mar 2026, 12:11 | 0.11 | 0.11 mg/l |
| 2 Feb 2026, 13:18 | 0.79 | 0.79 mg/l |
| 7 Jan 2026, 12:22 | 0.53 | 0.53 mg/l |
| 2 Dec 2025, 10:34 | 0.21 | 0.21 mg/l |
| 5 Nov 2025, 11:32 | 0.039 | 0.039 mg/l |
| 3 Oct 2025, 11:46 | 0.059 | 0.059 mg/l |
| 1 Sep 2025, 14:01 | 0.1 | 0.1 mg/l |
| 1 Aug 2025, 11:42 | 0.087 | 0.087 mg/l |
| 1 Jul 2025, 10:01 | 0.35 | 0.35 mg/l |
| 11 Jun 2025, 11:10 | 0.24 | 0.24 mg/l |
| 21 May 2025, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 11:44 | 0.18 | 0.18 mg/l |
| 24 Oct 2023, 10:36 | 0.37 | 0.37 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.84 mg/l
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 3.84 | 3.84 mg/l |
| 6 Jul 2026, 12:22 | 0.39 | 0.39 mg/l |
| 10 Jun 2026, 10:08 | 3.03 | 3.03 mg/l |
| 20 May 2026, 11:44 | 0.57 | 0.57 mg/l |
| 5 May 2026, 10:28 | 3.58 | 3.58 mg/l |
| 15 Apr 2026, 11:53 | 2.71 | 2.71 mg/l |
| 9 Apr 2026, 10:43 | 1.99 | 1.99 mg/l |
| 5 Mar 2026, 12:11 | 2.94 | 2.94 mg/l |
| 2 Feb 2026, 13:18 | 3.33 | 3.33 mg/l |
| 7 Jan 2026, 12:22 | 1.84 | 1.84 mg/l |
| 2 Dec 2025, 10:34 | 3.51 | 3.51 mg/l |
| 5 Nov 2025, 11:32 | 1.1 | 1.1 mg/l |
| 3 Oct 2025, 11:46 | 2.33 | 2.33 mg/l |
| 1 Sep 2025, 14:01 | 2.09 | 2.09 mg/l |
| 1 Aug 2025, 11:42 | 2.33 | 2.33 mg/l |
| 1 Jul 2025, 10:01 | 0.47 | 0.47 mg/l |
| 11 Jun 2025, 11:10 | 1.66 | 1.66 mg/l |
| 21 May 2025, 10:58 | 2.42 | 2.42 mg/l |
| 8 Apr 2025, 11:44 | 3.6 | 3.6 mg/l |
| 24 Oct 2023, 10:36 | 1.51 | 1.51 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.97 mg/l
Sampled 6 Jul 2026, 3 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Jul 2026, 12:22 | 0.97 | 0.97 mg/l |
| 10 Jun 2026, 10:08 | 0.56 | 0.56 mg/l |
| 20 May 2026, 11:44 | 0.9 | 0.9 mg/l |
| 5 May 2026, 10:28 | 0.83 | 0.83 mg/l |
| 15 Apr 2026, 11:53 | 0.4 | 0.4 mg/l |
| 9 Apr 2026, 10:43 | 0.39 | 0.39 mg/l |
| 5 Mar 2026, 12:11 | 0.25 | 0.25 mg/l |
| 2 Feb 2026, 13:18 | 0.23 | 0.23 mg/l |
| 7 Jan 2026, 12:22 | 0.19 | 0.19 mg/l |
| 2 Dec 2025, 10:34 | 0.25 | 0.25 mg/l |
| 5 Nov 2025, 11:32 | 0.35 | 0.35 mg/l |
| 3 Oct 2025, 11:46 | 0.47 | 0.47 mg/l |
| 1 Sep 2025, 14:01 | 0.63 | 0.63 mg/l |
| 1 Aug 2025, 11:42 | 0.33 | 0.33 mg/l |
| 1 Jul 2025, 10:01 | 1.3 | 1.3 mg/l |
| 11 Jun 2025, 11:10 | 0.59 | 0.59 mg/l |
| 21 May 2025, 10:58 | 0.66 | 0.66 mg/l |
| 8 Apr 2025, 11:44 | 0.57 | 0.57 mg/l |
| 24 Oct 2023, 10:36 | 0.11 | 0.11 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
912 µS/cm
Sampled 5 Aug 2026, 57 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:24 | 912 | 912 µS/cm |
| 6 Jul 2026, 12:22 | 1128 | 1128 µS/cm |
| 10 Jun 2026, 10:08 | 862 | 862 µS/cm |
| 20 May 2026, 11:44 | 1015 | 1015 µS/cm |
| 5 May 2026, 10:28 | 933 | 933 µS/cm |
| 15 Apr 2026, 11:53 | 964 | 964 µS/cm |
| 9 Apr 2026, 10:43 | 986 | 986 µS/cm |
| 5 Mar 2026, 12:11 | 1002 | 1002 µS/cm |
| 2 Feb 2026, 13:18 | 782 | 782 µS/cm |
| 7 Jan 2026, 12:22 | 1458 | 1458 µS/cm |
| 2 Dec 2025, 10:34 | 922 | 922 µS/cm |
| 5 Nov 2025, 11:32 | 859 | 859 µS/cm |
| 3 Oct 2025, 11:46 | 868 | 868 µS/cm |
| 1 Sep 2025, 14:01 | 822 | 822 µS/cm |
| 1 Aug 2025, 11:42 | 591 | 591 µS/cm |
| 1 Jul 2025, 10:01 | 1049 | 1049 µS/cm |
| 11 Jun 2025, 11:10 | 954 | 954 µS/cm |
| 21 May 2025, 10:58 | 988 | 988 µS/cm |
| 8 Apr 2025, 11:44 | 1024 | 1024 µS/cm |
| 24 Oct 2023, 10:36 | 385 | 385 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Oct 2023 – Aug 2026 | 69.6% 5 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Aug 2026 | 6.29 mg/l 5 Aug 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Aug 2026 | 20.2 °C 5 Aug 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Aug 2026 | 7.81 5 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 19 | Oct 2023 – Jul 2026 | 4.8 mg/l 6 Jul 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Aug 2026 | 3.84 mg/l 5 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 19 | Oct 2023 – Jul 2026 | 0.97 mg/l 6 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Aug 2026 | 912 µS/cm 5 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Oct 2023 – Aug 2026 | 260 mg/l 5 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 19 | Oct 2023 – Jul 2026 | 0.137 mg/l 6 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 15 | Apr 2025 – May 2026 | 3.4 mg/l 20 May 2026 |
| Nitrite as N 0118 | River water | 20 | Oct 2023 – Aug 2026 | 0.059 mg/l 5 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Aug 2026 | 3.9 mg/l 5 Aug 2026 |
| Perfluorooctanoate anion 9274 | River water | 18 | Oct 2023 – Aug 2026 | 0.0048 µg/l 5 Aug 2026 |
| Perfluorooctylsulphonate anion 9276 | River water | 18 | Oct 2023 – Aug 2026 | 0.011 µg/l 5 Aug 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.