Ravensbourne at Hayes Lane, Bromley
EA name: RAVENSBOURNE AT HAYES LANE, BROMLEY
Environment Agency sampling point TH-PRVR0029 · 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
- 28 Mar 2025, 11:1718 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 10 since 10 Jun 2024 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 541058, 167496As published, to the nearest 1 m. Open in a map
- River, by its own name
- Ravensbourne
- River, by the map
- Ravens BournePlaced on the river its name gives, 13 m from the line.
- Next gauge downstream
- Hayes Lane On the River Ravensbourne · 0.7 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.2%
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 93.2 | 93.2% |
| 20 Feb 2025, 08:50 | 92.5 | 92.5% |
| 2 Jan 2025, 08:10 | 90.4 | 90.4% |
| 4 Dec 2024, 08:24 | 84 | 84% |
| 20 Nov 2024, 09:15 | 90 | 90% |
| 22 Oct 2024, 12:04 | 87.1 | 87.1% |
| 4 Sep 2024, 09:34 | 78.7 | 78.7% |
| 12 Aug 2024, 08:39 | 78 | 78% |
| 9 Jul 2024, 12:46 | 82.6 | 82.6% |
| 10 Jun 2024, 09:57 | 76.7 | 76.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.2 mg/l
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 10.2 | 10.2 mg/l |
| 20 Feb 2025, 08:50 | 11.4 | 11.4 mg/l |
| 2 Jan 2025, 08:10 | 11.3 | 11.3 mg/l |
| 4 Dec 2024, 08:24 | 10.2 | 10.2 mg/l |
| 20 Nov 2024, 09:15 | 11.5 | 11.5 mg/l |
| 22 Oct 2024, 12:04 | 9.28 | 9.28 mg/l |
| 4 Sep 2024, 09:34 | 7.78 | 7.78 mg/l |
| 12 Aug 2024, 08:39 | 7.29 | 7.29 mg/l |
| 9 Jul 2024, 12:46 | 7.98 | 7.98 mg/l |
| 10 Jun 2024, 09:57 | 8.08 | 8.08 mg/l |
Water temperature
code 0076 · °C
11.2 °C
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 11.2 | 11.2 °C |
| 20 Feb 2025, 08:50 | 6.4 | 6.4 °C |
| 2 Jan 2025, 08:10 | 5.9 | 5.9 °C |
| 4 Dec 2024, 08:24 | 6.8 | 6.8 °C |
| 20 Nov 2024, 09:15 | 4.9 | 4.9 °C |
| 22 Oct 2024, 12:04 | 12.4 | 12.4 °C |
| 4 Sep 2024, 09:34 | 15.8 | 15.8 °C |
| 12 Aug 2024, 08:39 | 18.5 | 18.5 °C |
| 9 Jul 2024, 12:46 | 16.9 | 16.9 °C |
| 10 Jun 2024, 09:57 | 12.9 | 12.9 °C |
pH
code 0061
7.74
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 7.74 | 7.74 |
| 20 Feb 2025, 08:50 | 7.54 | 7.54 |
| 2 Jan 2025, 08:10 | 7.64 | 7.64 |
| 4 Dec 2024, 08:24 | 7.57 | 7.57 |
| 20 Nov 2024, 09:15 | 7.64 | 7.64 |
| 22 Oct 2024, 12:04 | 8.01 | 8.01 |
| 4 Sep 2024, 09:34 | 7.51 | 7.51 |
| 12 Aug 2024, 08:39 | 7.41 | 7.41 |
| 9 Jul 2024, 12:46 | 7.64 | 7.64 |
| 10 Jun 2024, 09:57 | 7.4 | 7.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.047 mg/l
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 0.047 | 0.047 mg/l |
| 20 Feb 2025, 08:50 | 0.091 | 0.091 mg/l |
| 2 Jan 2025, 08:10 | 0.065 | 0.065 mg/l |
| 4 Dec 2024, 08:24 | 0.053 | 0.053 mg/l |
| 20 Nov 2024, 09:15 | 0.14 | 0.14 mg/l |
| 22 Oct 2024, 12:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 09:34 | 0.099 | 0.099 mg/l |
| 12 Aug 2024, 08:39 | 0.13 | 0.13 mg/l |
| 9 Jul 2024, 12:46 | 0.055 | 0.055 mg/l |
| 10 Jun 2024, 09:57 | 0.086 | 0.086 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.193 mg/l
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 0.193 | 0.193 mg/l |
| 20 Feb 2025, 08:50 | 1.09 | 1.09 mg/l |
| 2 Jan 2025, 08:10 | 0.944 | 0.944 mg/l |
| 4 Dec 2024, 08:24 | 1.18 | 1.18 mg/l |
| 20 Nov 2024, 09:15 | 0.263 | 0.263 mg/l |
| 22 Oct 2024, 12:04 | 0.223 | 0.223 mg/l |
| 4 Sep 2024, 09:34 | 0.192 | 0.192 mg/l |
| 12 Aug 2024, 08:39 | 0.575 | 0.575 mg/l |
| 9 Jul 2024, 12:46 | 0.187 | 0.187 mg/l |
| 10 Jun 2024, 09:57 | 0.571 | 0.571 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.011 mg/l
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 0.011 | 0.011 mg/l |
| 20 Feb 2025, 08:50 | 0.034 | 0.034 mg/l |
| 2 Jan 2025, 08:10 | 0.04 | 0.04 mg/l |
| 4 Dec 2024, 08:24 | 0.026 | 0.026 mg/l |
| 20 Nov 2024, 09:15 | 0.06 | 0.06 mg/l |
| 22 Oct 2024, 12:04 | 0.03 | 0.03 mg/l |
| 4 Sep 2024, 09:34 | 0.068 | 0.068 mg/l |
| 12 Aug 2024, 08:39 | 0.14 | 0.14 mg/l |
| 9 Jul 2024, 12:46 | 0.06 | 0.06 mg/l |
| 10 Jun 2024, 09:57 | 0.058 | 0.058 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
432 µS/cm
Sampled 28 Mar 2025, 18 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Mar 2025, 11:17 | 432 | 432 µS/cm |
| 20 Feb 2025, 08:50 | 429 | 429 µS/cm |
| 2 Jan 2025, 08:10 | 432 | 432 µS/cm |
| 4 Dec 2024, 08:24 | 392 | 392 µS/cm |
| 20 Nov 2024, 09:15 | 432 | 432 µS/cm |
| 22 Oct 2024, 12:04 | 394 | 394 µS/cm |
| 4 Sep 2024, 09:34 | 385 | 385 µS/cm |
| 12 Aug 2024, 08:39 | 386 | 386 µS/cm |
| 9 Jul 2024, 12:46 | 377 | 377 µS/cm |
| 10 Jun 2024, 09:57 | 384 | 384 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Jun 2024 – Mar 2025 | 93.2% 28 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Jun 2024 – Mar 2025 | 10.2 mg/l 28 Mar 2025 |
| Temperature of Water 0076 | River water | 10 | Jun 2024 – Mar 2025 | 11.2 °C 28 Mar 2025 |
| pH 0061 | River water | 10 | Jun 2024 – Mar 2025 | 7.74 28 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Jun 2024 – Mar 2025 | 0.047 mg/l 28 Mar 2025 |
| Nitrate as N 0117 | River water | 10 | Jun 2024 – Mar 2025 | 0.193 mg/l 28 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Jun 2024 – Mar 2025 | 0.011 mg/l 28 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 10 | Jun 2024 – Mar 2025 | 432 µS/cm 28 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Jun 2024 – Mar 2025 | 120 mg/l 28 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 10 | Jun 2024 – Mar 2025 | 0.00052 mg/l 28 Mar 2025 |
| Nitrite as N 0118 | River water | 10 | Jun 2024 – Mar 2025 | 0.0075 mg/l 28 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Jun 2024 – Mar 2025 | below 0.2 mg/l 28 Mar 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.