Sherford at Snails Bridge
EA name: SHERFORD AT SNAILS BRIDGE (also listed as “SHERFORD AT SNAILS BRIDGE US BLACKHEATH”)
Environment Agency sampling point SW-50951085 · 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 May 2026, 09:024 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 28 since 21 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 389960, 93366As published, to the nearest 1 m. Open in a map
- River, by its own name
- Sherford
- River, by the map
- An unnamed streamOn a small stream traced into the river its name gives, 3 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (national agency policy) (28 samples)
3 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
74.4%
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 74.4 | 74.4% |
| 15 May 2026, 13:41 | 96.7 | 96.7% |
| 14 Apr 2026, 13:58 | 91.9 | 91.9% |
| 9 Apr 2026, 13:31 | 94.3 | 94.3% |
| 27 Mar 2026, 08:36 | 86.5 | 86.5% |
| 12 Mar 2026, 14:59 | 90.2 | 90.2% |
| 20 Feb 2026, 08:53 | 92.8 | 92.8% |
| 5 Feb 2026, 09:52 | 91.4 | 91.4% |
| 12 Jan 2026, 10:21 | 94 | 94% |
| 15 Dec 2025, 11:38 | 90.8 | 90.8% |
| 11 Dec 2025, 12:16 | 92 | 92% |
| 11 Nov 2025, 10:44 | 86.3 | 86.3% |
| 15 Oct 2025, 11:49 | 57.9 | 57.9% |
| 29 May 2025, 09:50 | 75.1 | 75.1% |
| 11 Apr 2025, 09:43 | 84.1 | 84.1% |
| 6 Mar 2025, 11:37 | 94.5 | 94.5% |
| 6 Feb 2025, 08:55 | 87.1 | 87.1% |
| 23 Jan 2025, 13:32 | 90.4 | 90.4% |
| 17 Dec 2024, 09:40 | 86.3 | 86.3% |
| 4 Dec 2024, 09:40 | 89.4 | 89.4% |
| 20 Nov 2024, 09:41 | 88.6 | 88.6% |
| 16 Oct 2024, 09:49 | 91.5 | 91.5% |
| 29 Aug 2024, 08:49 | 81.9 | 81.9% |
| 15 Jul 2024, 11:09 | 85.2 | 85.2% |
| 21 Jun 2024, 09:52 | 83.3 | 83.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.22 mg/l
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 7.22 | 7.22 mg/l |
| 15 May 2026, 13:41 | 10.4 | 10.4 mg/l |
| 14 Apr 2026, 13:58 | 10.2 | 10.2 mg/l |
| 9 Apr 2026, 13:31 | 9.69 | 9.69 mg/l |
| 27 Mar 2026, 08:36 | 9.98 | 9.98 mg/l |
| 12 Mar 2026, 14:59 | 10.3 | 10.3 mg/l |
| 20 Feb 2026, 08:53 | 11.3 | 11.3 mg/l |
| 5 Feb 2026, 09:52 | 10.7 | 10.7 mg/l |
| 12 Jan 2026, 10:21 | 11.3 | 11.3 mg/l |
| 15 Dec 2025, 11:38 | 10.3 | 10.3 mg/l |
| 11 Dec 2025, 12:16 | 10.6 | 10.6 mg/l |
| 11 Nov 2025, 10:44 | 9.3 | 9.3 mg/l |
| 15 Oct 2025, 11:49 | 6.27 | 6.27 mg/l |
| 29 May 2025, 09:50 | 7.64 | 7.64 mg/l |
| 11 Apr 2025, 09:43 | 9.92 | 9.92 mg/l |
| 6 Mar 2025, 11:37 | 11.1 | 11.1 mg/l |
| 6 Feb 2025, 08:55 | 11.1 | 11.1 mg/l |
| 23 Jan 2025, 13:32 | 11.1 | 11.1 mg/l |
| 17 Dec 2024, 09:40 | 9.86 | 9.86 mg/l |
| 4 Dec 2024, 09:40 | 11.1 | 11.1 mg/l |
| 20 Nov 2024, 09:41 | 11 | 11 mg/l |
| 16 Oct 2024, 09:49 | 9.45 | 9.45 mg/l |
| 29 Aug 2024, 08:49 | 8.51 | 8.51 mg/l |
| 15 Jul 2024, 11:09 | 8.74 | 8.74 mg/l |
| 21 Jun 2024, 09:52 | 8.53 | 8.53 mg/l |
Water temperature
code 0076 · °C
16.7 °C
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 16.7 | 16.7 °C |
| 15 May 2026, 13:41 | 12.1 | 12.1 °C |
| 14 Apr 2026, 13:58 | 10.7 | 10.7 °C |
| 9 Apr 2026, 13:31 | 14 | 14 °C |
| 27 Mar 2026, 08:36 | 9 | 9 °C |
| 12 Mar 2026, 14:59 | 9.6 | 9.6 °C |
| 20 Feb 2026, 08:53 | 6.9 | 6.9 °C |
| 5 Feb 2026, 09:52 | 8.3 | 8.3 °C |
| 12 Jan 2026, 10:21 | 7.5 | 7.5 °C |
| 15 Dec 2025, 11:38 | 9.8 | 9.8 °C |
| 11 Dec 2025, 12:16 | 9 | 9 °C |
| 11 Nov 2025, 10:44 | 11.9 | 11.9 °C |
| 15 Oct 2025, 11:49 | 11.7 | 11.7 °C |
| 29 May 2025, 09:50 | 14.5 | 14.5 °C |
| 11 Apr 2025, 09:43 | 8.1 | 8.1 °C |
| 6 Mar 2025, 11:37 | 8.2 | 8.2 °C |
| 6 Feb 2025, 08:55 | 5.2 | 5.2 °C |
| 23 Jan 2025, 13:32 | 6.4 | 6.4 °C |
| 17 Dec 2024, 09:40 | 9.4 | 9.4 °C |
| 4 Dec 2024, 09:40 | 6 | 6 °C |
| 20 Nov 2024, 09:41 | 6 | 6 °C |
| 16 Oct 2024, 09:49 | 13.8 | 13.8 °C |
| 29 Aug 2024, 08:49 | 13.5 | 13.5 °C |
| 15 Jul 2024, 11:09 | 14.1 | 14.1 °C |
| 21 Jun 2024, 09:52 | 14.2 | 14.2 °C |
pH
code 0061
6.96
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 6.96 | 6.96 |
| 15 May 2026, 13:41 | 7.11 | 7.11 |
| 14 Apr 2026, 13:58 | 6.62 | 6.62 |
| 9 Apr 2026, 13:31 | 6.62 | 6.62 |
| 27 Mar 2026, 08:36 | 7.52 | 7.52 |
| 12 Mar 2026, 14:59 | 6.84 | 6.84 |
| 20 Feb 2026, 08:53 | 7.17 | 7.17 |
| 5 Feb 2026, 09:52 | 7.16 | 7.16 |
| 12 Jan 2026, 10:21 | 7.61 | 7.61 |
| 15 Dec 2025, 11:38 | 7.1 | 7.1 |
| 11 Dec 2025, 12:16 | 7.17 | 7.17 |
| 11 Nov 2025, 10:44 | 6.53 | 6.53 |
| 15 Oct 2025, 11:49 | 5.99 | 5.99 |
| 29 May 2025, 09:50 | 6.54 | 6.54 |
| 11 Apr 2025, 09:43 | 6.72 | 6.72 |
| 6 Mar 2025, 11:37 | 6.99 | 6.99 |
| 6 Feb 2025, 08:55 | 7.01 | 7.01 |
| 23 Jan 2025, 13:32 | 7.04 | 7.04 |
| 17 Dec 2024, 09:40 | 6.98 | 6.98 |
| 4 Dec 2024, 09:40 | 6.88 | 6.88 |
| 20 Nov 2024, 09:41 | 7.35 | 7.35 |
| 16 Oct 2024, 09:49 | 7.17 | 7.17 |
| 29 Aug 2024, 08:49 | 6.64 | 6.64 |
| 15 Jul 2024, 11:09 | 6.65 | 6.65 |
| 21 Jun 2024, 09:52 | 6.76 | 6.76 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.12 mg/l
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 0.12 | 0.12 mg/l |
| 15 May 2026, 13:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 13:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2026, 13:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2026, 08:36 | 0.034 | 0.034 mg/l |
| 12 Mar 2026, 14:59 | 0.055 | 0.055 mg/l |
| 20 Feb 2026, 08:53 | 0.07 | 0.07 mg/l |
| 5 Feb 2026, 09:52 | 0.035 | 0.035 mg/l |
| 12 Jan 2026, 10:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Dec 2025, 11:38 | 0.034 | 0.034 mg/l |
| 11 Dec 2025, 12:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Nov 2025, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2025, 09:50 | 0.065 | 0.065 mg/l |
| 11 Apr 2025, 09:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 11:37 | 0.044 | 0.044 mg/l |
| 6 Feb 2025, 08:55 | 0.04 | 0.04 mg/l |
| 23 Jan 2025, 13:32 | 0.062 | 0.062 mg/l |
| 17 Dec 2024, 09:40 | 0.046 | 0.046 mg/l |
| 4 Dec 2024, 09:40 | 0.045 | 0.045 mg/l |
| 20 Nov 2024, 09:41 | 0.08 | 0.08 mg/l |
| 16 Oct 2024, 09:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Aug 2024, 08:49 | 0.035 | 0.035 mg/l |
| 15 Jul 2024, 11:09 | 0.035 | 0.035 mg/l |
| 21 Jun 2024, 09:52 | 0.034 | 0.034 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.786 mg/l
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 0.786 | 0.786 mg/l |
| 15 May 2026, 13:41 | 0.676 | 0.676 mg/l |
| 14 Apr 2026, 13:58 | 0.506 | 0.506 mg/l |
| 9 Apr 2026, 13:31 | 0.466 | 0.466 mg/l |
| 27 Mar 2026, 08:36 | 0.426 | 0.426 mg/l |
| 12 Mar 2026, 14:59 | 0.336 | 0.336 mg/l |
| 20 Feb 2026, 08:53 | 0.306 | 0.306 mg/l |
| 5 Feb 2026, 09:52 | 0.316 | 0.316 mg/l |
| 12 Jan 2026, 10:21 | 0.346 | 0.346 mg/l |
| 15 Dec 2025, 11:38 | 0.306 | 0.306 mg/l |
| 11 Dec 2025, 12:16 | 0.266 | 0.266 mg/l |
| 11 Nov 2025, 10:44 | 0.346 | 0.346 mg/l |
| 15 Oct 2025, 11:49 | 0.906 | 0.906 mg/l |
| 29 May 2025, 09:50 | 0.726 | 0.726 mg/l |
| 11 Apr 2025, 09:43 | 0.506 | 0.506 mg/l |
| 6 Mar 2025, 11:37 | 0.396 | 0.396 mg/l |
| 6 Feb 2025, 08:55 | 0.476 | 0.476 mg/l |
| 23 Jan 2025, 13:32 | 0.356 | 0.356 mg/l |
| 17 Dec 2024, 09:40 | 0.386 | 0.386 mg/l |
| 4 Dec 2024, 09:40 | 0.276 | 0.276 mg/l |
| 20 Nov 2024, 09:41 | 0.256 | 0.256 mg/l |
| 16 Oct 2024, 09:49 | <0.196 | below 0.196 mg/l (not detected above this) |
| 29 Aug 2024, 08:49 | 0.786 | 0.786 mg/l |
| 15 Jul 2024, 11:09 | 0.486 | 0.486 mg/l |
| 21 Jun 2024, 09:52 | 0.796 | 0.796 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 May 2026, 13:41 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Apr 2026, 13:58 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Apr 2026, 13:31 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Mar 2026, 08:36 | 0.015 | 0.015 mg/l |
| 12 Mar 2026, 14:59 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Feb 2026, 08:53 | 0.013 | 0.013 mg/l |
| 5 Feb 2026, 09:52 | 0.012 | 0.012 mg/l |
| 12 Jan 2026, 10:21 | 0.013 | 0.013 mg/l |
| 15 Dec 2025, 11:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Dec 2025, 12:16 | 0.012 | 0.012 mg/l |
| 11 Nov 2025, 10:44 | 0.016 | 0.016 mg/l |
| 15 Oct 2025, 11:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 29 May 2025, 09:50 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Apr 2025, 09:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 Mar 2025, 11:37 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 Feb 2025, 08:55 | <0.01 | below 0.01 mg/l (not detected above this) |
| 23 Jan 2025, 13:32 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Dec 2024, 09:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Dec 2024, 09:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Nov 2024, 09:41 | 0.014 | 0.014 mg/l |
| 16 Oct 2024, 09:49 | 0.024 | 0.024 mg/l |
| 29 Aug 2024, 08:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 Jul 2024, 11:09 | <0.01 | below 0.01 mg/l (not detected above this) |
| 21 Jun 2024, 09:52 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
196 µS/cm
Sampled 28 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:02 | 196 | 196 µS/cm |
| 15 May 2026, 13:41 | 395 | 395 µS/cm |
| 14 Apr 2026, 13:58 | 170 | 170 µS/cm |
| 9 Apr 2026, 13:31 | 170 | 170 µS/cm |
| 27 Mar 2026, 08:36 | 165 | 165 µS/cm |
| 12 Mar 2026, 14:59 | 160 | 160 µS/cm |
| 20 Feb 2026, 08:53 | 131 | 131 µS/cm |
| 5 Feb 2026, 09:52 | 145 | 145 µS/cm |
| 12 Jan 2026, 10:21 | 169 | 169 µS/cm |
| 15 Dec 2025, 11:38 | 181 | 181 µS/cm |
| 11 Dec 2025, 12:16 | 157 | 157 µS/cm |
| 11 Nov 2025, 10:44 | 146 | 146 µS/cm |
| 15 Oct 2025, 11:49 | 187 | 187 µS/cm |
| 29 May 2025, 09:50 | 190 | 190 µS/cm |
| 11 Apr 2025, 09:43 | 190 | 190 µS/cm |
| 6 Mar 2025, 11:37 | 190 | 190 µS/cm |
| 6 Feb 2025, 08:55 | 187 | 187 µS/cm |
| 23 Jan 2025, 13:32 | 168 | 168 µS/cm |
| 17 Dec 2024, 09:40 | 183 | 183 µS/cm |
| 4 Dec 2024, 09:40 | 168 | 168 µS/cm |
| 20 Nov 2024, 09:41 | 189 | 189 µS/cm |
| 16 Oct 2024, 09:49 | 160 | 160 µS/cm |
| 29 Aug 2024, 08:49 | 198 | 198 µS/cm |
| 15 Jul 2024, 11:09 | 184 | 184 µS/cm |
| 21 Jun 2024, 09:52 | 211 | 211 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 25 | Jun 2024 – May 2026 | 74.4% 28 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Jun 2024 – May 2026 | 7.22 mg/l 28 May 2026 |
| Temperature of Water 0076 | River water | 25 | Jun 2024 – May 2026 | 16.7 °C 28 May 2026 |
| pH 0061 | River water | 25 | Jun 2024 – May 2026 | 6.96 28 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | 0.12 mg/l 28 May 2026 |
| Nitrate as N 0117 | River water | 25 | Jun 2024 – May 2026 | 0.786 mg/l 28 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Jun 2024 – May 2026 | below 0.01 mg/l 28 May 2026 |
| Conductivity at 25 C 0077 | River water | 25 | Jun 2024 – May 2026 | 196 µS/cm 28 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Jun 2024 – May 2026 | 19 mg/l 28 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | 0.00033 mg/l 28 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | below 1 mg/l 28 May 2026 |
| Nitrite as N 0118 | River water | 25 | Jun 2024 – May 2026 | below 0.004 mg/l 28 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Jun 2024 – May 2026 | 0.79 mg/l 28 May 2026 |
| No flow /No sample 7668 | River water | 3 | Jun 2025 – Aug 2025 | No flow/discharge at sampling point 5 Aug 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.