Old West River Old Streatham P.S. Bridge
EA name: OLD WEST R. OLD STREATHAM P.S. BRIDGE
Environment Agency sampling point AN-35M24 · 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
- 2 Sep 2026, 11:1329 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 551500, 272900As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Environmental monitoring statutory (EU directives) (23 samples)
Planned investigation (local monitoring) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
77.8%
Sampled 2 Sep 2026, 29 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 77.8 | 77.8% |
| 13 Aug 2026, 09:37 | 85.4 | 85.4% |
| 15 Jul 2026, 14:16 | 113 | 113% |
| 8 Jun 2026, 16:01 | 106.9 | 106.9% |
| 14 May 2026, 13:11 | 158.7 | 158.7% |
| 20 Apr 2026, 12:22 | 113.8 | 113.8% |
| 5 Mar 2026, 14:26 | 102.8 | 102.8% |
| 9 Feb 2026, 15:58 | 79.8 | 79.8% |
| 7 Jan 2026, 13:39 | 82.5 | 82.5% |
| 1 Dec 2025, 15:49 | 80.3 | 80.3% |
| 5 Nov 2025, 14:12 | 81.1 | 81.1% |
| 28 Oct 2025, 11:10 | 84.2 | 84.2% |
| 3 Apr 2025, 13:36 | 150.3 | 150.3% |
| 13 Mar 2025, 15:33 | 126.2 | 126.2% |
| 10 Feb 2025, 16:42 | 89.4 | 89.4% |
| 2 Jan 2025, 14:08 | 84.4 | 84.4% |
| 2 Dec 2024, 09:15 | 79.8 | 79.8% |
| 4 Nov 2024, 13:39 | 53.3 | 53.3% |
| 2 Oct 2024, 12:46 | 68.7 | 68.7% |
| 6 Sep 2024, 12:57 | 93.5 | 93.5% |
| 16 Aug 2024, 12:10 | 92.7 | 92.7% |
| 3 Jul 2024, 13:42 | 101.4 | 101.4% |
| 7 Jun 2024, 10:08 | 104.2 | 104.2% |
| 1 Mar 2024, 14:01 | 85.8 | 85.8% |
| 1 Feb 2024, 10:18 | 79.2 | 79.2% |
| 3 Jan 2024, 12:22 | 80.1 | 80.1% |
| 4 Dec 2023, 09:15 | 80.7 | 80.7% |
| 2 Nov 2023, 10:22 | 72 | 72% |
| 2 Oct 2023, 08:23 | 46.3 | 46.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.22 mg/l
Sampled 2 Sep 2026, 29 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 7.22 | 7.22 mg/l |
| 13 Aug 2026, 09:37 | 7.44 | 7.44 mg/l |
| 15 Jul 2026, 14:16 | 9.57 | 9.57 mg/l |
| 8 Jun 2026, 16:01 | 10.2 | 10.2 mg/l |
| 14 May 2026, 13:11 | 16.5 | 16.5 mg/l |
| 20 Apr 2026, 12:22 | 11.7 | 11.7 mg/l |
| 5 Mar 2026, 14:26 | 11.4 | 11.4 mg/l |
| 9 Feb 2026, 15:58 | 9.53 | 9.53 mg/l |
| 7 Jan 2026, 13:39 | 11.5 | 11.5 mg/l |
| 1 Dec 2025, 15:49 | 9.71 | 9.71 mg/l |
| 5 Nov 2025, 14:12 | 8.64 | 8.64 mg/l |
| 28 Oct 2025, 11:10 | 9.55 | 9.55 mg/l |
| 3 Apr 2025, 13:36 | 15.8 | 15.8 mg/l |
| 13 Mar 2025, 15:33 | 15 | 15 mg/l |
| 10 Feb 2025, 16:42 | 11.6 | 11.6 mg/l |
| 2 Jan 2025, 14:08 | 10.4 | 10.4 mg/l |
| 2 Dec 2024, 09:15 | 9.41 | 9.41 mg/l |
| 4 Nov 2024, 13:39 | 5.74 | 5.74 mg/l |
| 2 Oct 2024, 12:46 | 7.08 | 7.08 mg/l |
| 6 Sep 2024, 12:57 | 8.45 | 8.45 mg/l |
| 16 Aug 2024, 12:10 | 8.09 | 8.09 mg/l |
| 3 Jul 2024, 13:42 | 9.65 | 9.65 mg/l |
| 7 Jun 2024, 10:08 | 10 | 10 mg/l |
| 1 Mar 2024, 14:01 | 10.3 | 10.3 mg/l |
| 1 Feb 2024, 10:18 | 9.77 | 9.77 mg/l |
| 3 Jan 2024, 12:22 | 9.43 | 9.43 mg/l |
| 4 Dec 2023, 09:15 | 10.6 | 10.6 mg/l |
| 2 Nov 2023, 10:22 | 7.94 | 7.94 mg/l |
| 2 Oct 2023, 08:23 | 4.47 | 4.47 mg/l |
Water temperature
code 0076 · °C
18.8 °C
Sampled 2 Sep 2026, 29 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 18.8 | 18.8 °C |
| 13 Aug 2026, 09:37 | 22 | 22 °C |
| 15 Jul 2026, 14:16 | 23.5 | 23.5 °C |
| 8 Jun 2026, 16:01 | 17.4 | 17.4 °C |
| 14 May 2026, 13:11 | 13.4 | 13.4 °C |
| 20 Apr 2026, 12:22 | 14.1 | 14.1 °C |
| 5 Mar 2026, 14:26 | 10.7 | 10.7 °C |
| 9 Feb 2026, 15:58 | 7.6 | 7.6 °C |
| 7 Jan 2026, 13:39 | 1.8 | 1.8 °C |
| 1 Dec 2025, 15:49 | 7.1 | 7.1 °C |
| 5 Nov 2025, 14:12 | 12.4 | 12.4 °C |
| 28 Oct 2025, 11:10 | 9.7 | 9.7 °C |
| 3 Apr 2025, 13:36 | 12.9 | 12.9 °C |
| 13 Mar 2025, 15:33 | 7.9 | 7.9 °C |
| 10 Feb 2025, 16:42 | 4.5 | 4.5 °C |
| 2 Jan 2025, 14:08 | 6.3 | 6.3 °C |
| 2 Dec 2024, 09:15 | 8.1 | 8.1 °C |
| 4 Nov 2024, 13:39 | 11.9 | 11.9 °C |
| 2 Oct 2024, 12:46 | 13.9 | 13.9 °C |
| 6 Sep 2024, 12:57 | 20.2 | 20.2 °C |
| 16 Aug 2024, 12:10 | 22 | 22 °C |
| 3 Jul 2024, 13:42 | 17.6 | 17.6 °C |
| 7 Jun 2024, 10:08 | 17.2 | 17.2 °C |
| 1 Mar 2024, 14:01 | 7.5 | 7.5 °C |
| 1 Feb 2024, 10:18 | 6.3 | 6.3 °C |
| 3 Jan 2024, 12:22 | 8.2 | 8.2 °C |
| 4 Dec 2023, 09:15 | 3.8 | 3.8 °C |
| 2 Nov 2023, 10:22 | 10.9 | 10.9 °C |
| 2 Oct 2023, 08:23 | 16.9 | 16.9 °C |
pH
code 0061
7.99
Sampled 5 Mar 2026, 7 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Mar 2026, 14:26 | 7.99 | 7.99 |
| 9 Feb 2026, 15:58 | 7.68 | 7.68 |
| 7 Jan 2026, 13:39 | 7.74 | 7.74 |
| 1 Dec 2025, 15:49 | 7.72 | 7.72 |
| 5 Nov 2025, 14:12 | 7.99 | 7.99 |
| 28 Oct 2025, 11:10 | 8 | 8 |
| 3 Apr 2025, 13:36 | 8.39 | 8.39 |
| 13 Mar 2025, 15:33 | 8.28 | 8.28 |
| 10 Feb 2025, 16:42 | 7.83 | 7.83 |
| 2 Jan 2025, 14:08 | 8.03 | 8.03 |
| 2 Dec 2024, 09:15 | 7.72 | 7.72 |
| 4 Nov 2024, 13:39 | 7.58 | 7.58 |
| 2 Oct 2024, 12:46 | 7.64 | 7.64 |
| 6 Sep 2024, 12:57 | 7.92 | 7.92 |
| 16 Aug 2024, 12:10 | 8.17 | 8.17 |
| 3 Jul 2024, 13:42 | 8.15 | 8.15 |
| 7 Jun 2024, 10:08 | 7.99 | 7.99 |
| 1 Mar 2024, 14:01 | 7.82 | 7.82 |
| 1 Feb 2024, 10:18 | 7.9 | 7.9 |
| 3 Jan 2024, 12:22 | 7.81 | 7.81 |
| 4 Dec 2023, 09:15 | 7.71 | 7.71 |
| 2 Nov 2023, 10:22 | 7.76 | 7.76 |
| 2 Oct 2023, 08:23 | 7.63 | 7.63 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.049 mg/l
Sampled 2 Sep 2026, 29 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 0.049 | 0.049 mg/l |
| 13 Aug 2026, 09:37 | 0.056 | 0.056 mg/l |
| 15 Jul 2026, 14:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 16:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 13:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Apr 2026, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 14:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2026, 15:58 | 0.12 | 0.12 mg/l |
| 7 Jan 2026, 13:39 | 0.21 | 0.21 mg/l |
| 1 Dec 2025, 15:49 | 0.14 | 0.14 mg/l |
| 5 Nov 2025, 14:12 | 0.033 | 0.033 mg/l |
| 28 Oct 2025, 11:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2025, 15:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 16:42 | 0.28 | 0.28 mg/l |
| 2 Jan 2025, 14:08 | 0.085 | 0.085 mg/l |
| 2 Dec 2024, 09:15 | 0.18 | 0.18 mg/l |
| 4 Nov 2024, 13:39 | 0.036 | 0.036 mg/l |
| 2 Oct 2024, 12:46 | 0.083 | 0.083 mg/l |
| 6 Sep 2024, 12:57 | 0.04 | 0.04 mg/l |
| 16 Aug 2024, 12:10 | 0.059 | 0.059 mg/l |
| 3 Jul 2024, 13:42 | 0.037 | 0.037 mg/l |
| 7 Jun 2024, 10:08 | 0.073 | 0.073 mg/l |
| 1 Mar 2024, 14:01 | 0.38 | 0.38 mg/l |
| 1 Feb 2024, 10:18 | 0.3 | 0.3 mg/l |
| 3 Jan 2024, 12:22 | 0.096 | 0.096 mg/l |
| 4 Dec 2023, 09:15 | 0.3 | 0.3 mg/l |
| 2 Nov 2023, 10:22 | 0.12 | 0.12 mg/l |
| 2 Oct 2023, 08:23 | 0.043 | 0.043 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.37 mg/l
Sampled 2 Sep 2026, 29 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 8.37 | 8.37 mg/l |
| 13 Aug 2026, 09:37 | 9.07 | 9.07 mg/l |
| 15 Jul 2026, 14:16 | 10.9 | 10.9 mg/l |
| 8 Jun 2026, 16:01 | 10.9 | 10.9 mg/l |
| 14 May 2026, 13:11 | 10.9 | 10.9 mg/l |
| 20 Apr 2026, 12:22 | 11 | 11 mg/l |
| 5 Mar 2026, 14:26 | 8.36 | 8.36 mg/l |
| 9 Feb 2026, 15:58 | 15.9 | 15.9 mg/l |
| 7 Jan 2026, 13:39 | 10.9 | 10.9 mg/l |
| 1 Dec 2025, 15:49 | 10.7 | 10.7 mg/l |
| 5 Nov 2025, 14:12 | 2.07 | 2.07 mg/l |
| 28 Oct 2025, 11:10 | 2.27 | 2.27 mg/l |
| 13 Mar 2025, 15:33 | 9.28 | 9.28 mg/l |
| 10 Feb 2025, 16:42 | 9.95 | 9.95 mg/l |
| 2 Jan 2025, 14:08 | 10.9 | 10.9 mg/l |
| 2 Dec 2024, 09:15 | 11.9 | 11.9 mg/l |
| 4 Nov 2024, 13:39 | 5.93 | 5.93 mg/l |
| 2 Oct 2024, 12:46 | 9.92 | 9.92 mg/l |
| 6 Sep 2024, 12:57 | 9.96 | 9.96 mg/l |
| 16 Aug 2024, 12:10 | 9.95 | 9.95 mg/l |
| 3 Jul 2024, 13:42 | 9.94 | 9.94 mg/l |
| 7 Jun 2024, 10:08 | 5.27 | 5.27 mg/l |
| 1 Mar 2024, 14:01 | 7.54 | 7.54 mg/l |
| 1 Feb 2024, 10:18 | 9.92 | 9.92 mg/l |
| 3 Jan 2024, 12:22 | 7.46 | 7.46 mg/l |
| 4 Dec 2023, 09:15 | 11.9 | 11.9 mg/l |
| 2 Nov 2023, 10:22 | 10.9 | 10.9 mg/l |
| 2 Oct 2023, 08:23 | 3.33 | 3.33 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.37 mg/l
Sampled 2 Sep 2026, 29 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 0.37 | 0.37 mg/l |
| 13 Aug 2026, 09:37 | 0.31 | 0.31 mg/l |
| 15 Jul 2026, 14:16 | 0.31 | 0.31 mg/l |
| 8 Jun 2026, 16:01 | 0.31 | 0.31 mg/l |
| 14 May 2026, 13:11 | 0.2 | 0.2 mg/l |
| 20 Apr 2026, 12:22 | 0.16 | 0.16 mg/l |
| 5 Mar 2026, 14:26 | 0.037 | 0.037 mg/l |
| 9 Feb 2026, 15:58 | 0.051 | 0.051 mg/l |
| 7 Jan 2026, 13:39 | 0.15 | 0.15 mg/l |
| 1 Dec 2025, 15:49 | 0.075 | 0.075 mg/l |
| 5 Nov 2025, 14:12 | 0.13 | 0.13 mg/l |
| 28 Oct 2025, 11:10 | 0.14 | 0.14 mg/l |
| 13 Mar 2025, 15:33 | 0.016 | 0.016 mg/l |
| 10 Feb 2025, 16:42 | 0.075 | 0.075 mg/l |
| 2 Jan 2025, 14:08 | 0.097 | 0.097 mg/l |
| 2 Dec 2024, 09:15 | 0.065 | 0.065 mg/l |
| 4 Nov 2024, 13:39 | 0.081 | 0.081 mg/l |
| 2 Oct 2024, 12:46 | 0.11 | 0.11 mg/l |
| 6 Sep 2024, 12:57 | 0.28 | 0.28 mg/l |
| 16 Aug 2024, 12:10 | 0.35 | 0.35 mg/l |
| 3 Jul 2024, 13:42 | 0.22 | 0.22 mg/l |
| 7 Jun 2024, 10:08 | 0.044 | 0.044 mg/l |
| 1 Mar 2024, 14:01 | 0.043 | 0.043 mg/l |
| 1 Feb 2024, 10:18 | 0.077 | 0.077 mg/l |
| 3 Jan 2024, 12:22 | 0.16 | 0.16 mg/l |
| 4 Dec 2023, 09:15 | 0.07 | 0.07 mg/l |
| 2 Nov 2023, 10:22 | 0.1 | 0.1 mg/l |
| 2 Oct 2023, 08:23 | 0.12 | 0.12 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
981 µS/cm
Sampled 2 Sep 2026, 29 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:13 | 981 | 981 µS/cm |
| 13 Aug 2026, 09:37 | 1014 | 1014 µS/cm |
| 15 Jul 2026, 14:16 | 982 | 982 µS/cm |
| 8 Jun 2026, 16:01 | 908 | 908 µS/cm |
| 14 May 2026, 13:11 | 858 | 858 µS/cm |
| 20 Apr 2026, 12:22 | 859 | 859 µS/cm |
| 5 Mar 2026, 14:26 | 1105 | 1105 µS/cm |
| 9 Feb 2026, 15:58 | 1250 | 1250 µS/cm |
| 7 Jan 2026, 13:39 | 1410 | 1410 µS/cm |
| 1 Dec 2025, 15:49 | 1332 | 1332 µS/cm |
| 5 Nov 2025, 14:12 | 1115 | 1115 µS/cm |
| 28 Oct 2025, 11:10 | 1109 | 1109 µS/cm |
| 3 Apr 2025, 13:36 | 979 | 979 µS/cm |
| 13 Mar 2025, 15:33 | 1156 | 1156 µS/cm |
| 10 Feb 2025, 16:42 | 1345 | 1345 µS/cm |
| 2 Jan 2025, 14:08 | 1298 | 1298 µS/cm |
| 2 Dec 2024, 09:15 | 1199 | 1199 µS/cm |
| 4 Nov 2024, 13:39 | 1285 | 1285 µS/cm |
| 2 Oct 2024, 12:46 | 710 | 710 µS/cm |
| 6 Sep 2024, 12:57 | 865 | 865 µS/cm |
| 16 Aug 2024, 12:10 | 893 | 893 µS/cm |
| 3 Jul 2024, 13:42 | 854 | 854 µS/cm |
| 7 Jun 2024, 10:08 | 1001 | 1001 µS/cm |
| 1 Mar 2024, 14:01 | 1128 | 1128 µS/cm |
| 1 Feb 2024, 10:18 | 1316 | 1316 µS/cm |
| 3 Jan 2024, 12:22 | 679 | 679 µS/cm |
| 4 Dec 2023, 09:15 | 1248 | 1248 µS/cm |
| 2 Nov 2023, 10:22 | 1032 | 1032 µS/cm |
| 2 Oct 2023, 08:23 | 1146 | 1146 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 | 29 | Oct 2023 – Sep 2026 | 77.8% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Sep 2026 | 7.22 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Sep 2026 | 18.8 °C 2 Sep 2026 |
| pH 0061 | River water | 23 | Oct 2023 – Mar 2026 | 7.99 5 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Oct 2023 – Sep 2026 | 0.049 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 28 | Oct 2023 – Sep 2026 | 8.37 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Oct 2023 – Sep 2026 | 0.37 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Sep 2026 | 981 µS/cm 2 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Mar 2026 | 230 mg/l 5 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Mar 2026 | below 0.00056 mg/l 5 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 6 | Apr 2026 – Sep 2026 | below 3 mg/l 2 Sep 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 5 | Apr 2026 – Sep 2026 | 18 mg/l 2 Sep 2026 |
| Chloride 0172 | River water | 6 | Apr 2026 – Sep 2026 | 110 mg/l 2 Sep 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 6 | Apr 2026 – Sep 2026 | 2.4 µg/l 2 Sep 2026 |
| Nitrite as N 0118 | River water | 28 | Oct 2023 – Sep 2026 | 0.026 mg/l 2 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Oct 2023 – Sep 2026 | 8.4 mg/l 2 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 6 | Apr 2026 – Sep 2026 | 6.6 mg/l 2 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Apr 2026 – Sep 2026 | below 3 mg/l 2 Sep 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.