River Snail Road Bridge Snailwell
EA name: R.SNAIL RD.BR.SNAILWELL
Environment Agency sampling point AN-36M22 · 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
- 4 Sep 2026, 09:4327 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 since 9 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 563942, 268179As published, to the nearest 1 m. Open in a map
- River, by its own name
- Snail
- River, by the map
- River SnailPlaced on the river its name gives, 7 m from the line.
- Next gauge downstream
- Ely On the River Great Ouse · 21 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (29 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
75.8%
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 75.8 | 75.8% |
| 5 Aug 2026, 12:39 | 91.4 | 91.4% |
| 9 Jul 2026, 09:34 | 77.5 | 77.5% |
| 8 Jun 2026, 11:49 | 61 | 61% |
| 15 May 2026, 10:55 | 83 | 83% |
| 29 Apr 2026, 09:17 | 85.9 | 85.9% |
| 2 Mar 2026, 15:20 | 91.3 | 91.3% |
| 3 Feb 2026, 13:14 | 78.1 | 78.1% |
| 13 Jan 2026, 16:22 | 78.4 | 78.4% |
| 1 Dec 2025, 15:18 | 74.8 | 74.8% |
| 5 Nov 2025, 10:57 | 72.8 | 72.8% |
| 16 Oct 2025, 14:14 | 89.1 | 89.1% |
| 4 Apr 2025, 09:34 | 88.1 | 88.1% |
| 4 Mar 2025, 13:54 | 88.2 | 88.2% |
| 10 Feb 2025, 11:41 | 86.2 | 86.2% |
| 2 Jan 2025, 12:56 | 85.2 | 85.2% |
| 3 Dec 2024, 15:51 | 77.6 | 77.6% |
| 4 Nov 2024, 11:00 | 82.7 | 82.7% |
| 11 Oct 2024, 09:59 | 86.5 | 86.5% |
| 11 Sep 2024, 14:20 | 78.5 | 78.5% |
| 5 Aug 2024, 14:10 | 86.4 | 86.4% |
| 5 Jul 2024, 09:31 | 75.2 | 75.2% |
| 5 Jun 2024, 11:25 | 76.7 | 76.7% |
| 5 Mar 2024, 12:03 | 82.1 | 82.1% |
| 1 Feb 2024, 11:50 | 82.9 | 82.9% |
| 3 Jan 2024, 10:34 | 78.1 | 78.1% |
| 8 Dec 2023, 11:42 | 76.5 | 76.5% |
| 2 Nov 2023, 11:59 | 75.4 | 75.4% |
| 9 Oct 2023, 14:11 | 87.3 | 87.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.64 mg/l
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 7.64 | 7.64 mg/l |
| 5 Aug 2026, 12:39 | 9.02 | 9.02 mg/l |
| 9 Jul 2026, 09:34 | 7.78 | 7.78 mg/l |
| 8 Jun 2026, 11:49 | 6.48 | 6.48 mg/l |
| 15 May 2026, 10:55 | 8.8 | 8.8 mg/l |
| 29 Apr 2026, 09:17 | 9.52 | 9.52 mg/l |
| 2 Mar 2026, 15:20 | 9.91 | 9.91 mg/l |
| 3 Feb 2026, 13:14 | 8.97 | 8.97 mg/l |
| 13 Jan 2026, 16:22 | 8.79 | 8.79 mg/l |
| 1 Dec 2025, 15:18 | 8.37 | 8.37 mg/l |
| 5 Nov 2025, 10:57 | 7.79 | 7.79 mg/l |
| 16 Oct 2025, 14:14 | 9.56 | 9.56 mg/l |
| 4 Apr 2025, 09:34 | 9.76 | 9.76 mg/l |
| 4 Mar 2025, 13:54 | 9.82 | 9.82 mg/l |
| 10 Feb 2025, 11:41 | 10 | 10 mg/l |
| 2 Jan 2025, 12:56 | 10.2 | 10.2 mg/l |
| 3 Dec 2024, 15:51 | 8.81 | 8.81 mg/l |
| 4 Nov 2024, 11:00 | 9.04 | 9.04 mg/l |
| 11 Oct 2024, 09:59 | 9.96 | 9.96 mg/l |
| 11 Sep 2024, 14:20 | 7.83 | 7.83 mg/l |
| 5 Aug 2024, 14:10 | 8.94 | 8.94 mg/l |
| 5 Jul 2024, 09:31 | 8.1 | 8.1 mg/l |
| 5 Jun 2024, 11:25 | 8.36 | 8.36 mg/l |
| 5 Mar 2024, 12:03 | 9.25 | 9.25 mg/l |
| 1 Feb 2024, 11:50 | 9.45 | 9.45 mg/l |
| 3 Jan 2024, 10:34 | 8.8 | 8.8 mg/l |
| 8 Dec 2023, 11:42 | 8.68 | 8.68 mg/l |
| 2 Nov 2023, 11:59 | 8.26 | 8.26 mg/l |
| 9 Oct 2023, 14:11 | 9.07 | 9.07 mg/l |
Water temperature
code 0076 · °C
14.9 °C
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 14.9 | 14.9 °C |
| 5 Aug 2026, 12:39 | 15.9 | 15.9 °C |
| 9 Jul 2026, 09:34 | 15.1 | 15.1 °C |
| 8 Jun 2026, 11:49 | 12.5 | 12.5 °C |
| 15 May 2026, 10:55 | 12.6 | 12.6 °C |
| 29 Apr 2026, 09:17 | 10.7 | 10.7 °C |
| 2 Mar 2026, 15:20 | 11.6 | 11.6 °C |
| 3 Feb 2026, 13:14 | 9.2 | 9.2 °C |
| 13 Jan 2026, 16:22 | 10.2 | 10.2 °C |
| 1 Dec 2025, 15:18 | 10.3 | 10.3 °C |
| 5 Nov 2025, 10:57 | 12.2 | 12.2 °C |
| 16 Oct 2025, 14:14 | 12.1 | 12.1 °C |
| 4 Apr 2025, 09:34 | 10.7 | 10.7 °C |
| 4 Mar 2025, 13:54 | 10.5 | 10.5 °C |
| 10 Feb 2025, 11:41 | 8.8 | 8.8 °C |
| 2 Jan 2025, 12:56 | 7.4 | 7.4 °C |
| 3 Dec 2024, 15:51 | 9.7 | 9.7 °C |
| 4 Nov 2024, 11:00 | 11.3 | 11.3 °C |
| 11 Oct 2024, 09:59 | 9.1 | 9.1 °C |
| 11 Sep 2024, 14:20 | 15.4 | 15.4 °C |
| 5 Aug 2024, 14:10 | 13.7 | 13.7 °C |
| 5 Jul 2024, 09:31 | 11.9 | 11.9 °C |
| 5 Jun 2024, 11:25 | 11.4 | 11.4 °C |
| 5 Mar 2024, 12:03 | 10 | 10 °C |
| 1 Feb 2024, 11:50 | 9.5 | 9.5 °C |
| 3 Jan 2024, 10:34 | 10 | 10 °C |
| 8 Dec 2023, 11:42 | 9.7 | 9.7 °C |
| 2 Nov 2023, 11:59 | 11.2 | 11.2 °C |
| 9 Oct 2023, 14:11 | 13.5 | 13.5 °C |
pH
code 0061
7.51
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 7.51 | 7.51 |
| 5 Aug 2026, 12:39 | 7.55 | 7.55 |
| 9 Jul 2026, 09:34 | 7.54 | 7.54 |
| 8 Jun 2026, 11:49 | 7.57 | 7.57 |
| 15 May 2026, 10:55 | 7.69 | 7.69 |
| 29 Apr 2026, 09:17 | 7.76 | 7.76 |
| 2 Mar 2026, 15:20 | 7.55 | 7.55 |
| 3 Feb 2026, 13:14 | 7.76 | 7.76 |
| 13 Jan 2026, 16:22 | 7.5 | 7.5 |
| 1 Dec 2025, 15:18 | 7.45 | 7.45 |
| 5 Nov 2025, 10:57 | 7.59 | 7.59 |
| 16 Oct 2025, 14:14 | 7.81 | 7.81 |
| 4 Apr 2025, 09:34 | 7.61 | 7.61 |
| 4 Mar 2025, 13:54 | 7.54 | 7.54 |
| 10 Feb 2025, 11:41 | 7.48 | 7.48 |
| 2 Jan 2025, 12:56 | 7.5 | 7.5 |
| 3 Dec 2024, 15:51 | 7.49 | 7.49 |
| 4 Nov 2024, 11:00 | 7.49 | 7.49 |
| 11 Oct 2024, 09:59 | 7.51 | 7.51 |
| 11 Sep 2024, 14:20 | 7.56 | 7.56 |
| 5 Aug 2024, 14:10 | 7.57 | 7.57 |
| 5 Jul 2024, 09:31 | 7.52 | 7.52 |
| 5 Jun 2024, 11:25 | 7.43 | 7.43 |
| 5 Mar 2024, 12:03 | 7.61 | 7.61 |
| 1 Feb 2024, 11:50 | 7.51 | 7.51 |
| 3 Jan 2024, 10:34 | 7.48 | 7.48 |
| 8 Dec 2023, 11:42 | 7.37 | 7.37 |
| 2 Nov 2023, 11:59 | 7.51 | 7.51 |
| 9 Oct 2023, 14:11 | 7.6 | 7.6 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2026, 09:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 11:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 May 2026, 10:55 | 0.096 | 0.096 mg/l |
| 29 Apr 2026, 09:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 15:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2026, 13:14 | 0.1 | 0.1 mg/l |
| 13 Jan 2026, 16:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2025, 15:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 10:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2025, 14:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Apr 2025, 09:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 13:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jan 2025, 12:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2024, 15:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2024, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Oct 2024, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Sep 2024, 14:20 | 0.1 | 0.1 mg/l |
| 5 Aug 2024, 14:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jul 2024, 09:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2024, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2024, 12:03 | 0.061 | 0.061 mg/l |
| 1 Feb 2024, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jan 2024, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Dec 2023, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Nov 2023, 11:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2023, 14:11 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.3 mg/l
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 5.3 | 5.3 mg/l |
| 5 Aug 2026, 12:39 | 7.19 | 7.19 mg/l |
| 9 Jul 2026, 09:34 | 6.98 | 6.98 mg/l |
| 8 Jun 2026, 11:49 | 7.18 | 7.18 mg/l |
| 15 May 2026, 10:55 | 19.9 | 19.9 mg/l |
| 29 Apr 2026, 09:17 | 7.59 | 7.59 mg/l |
| 2 Mar 2026, 15:20 | 7.69 | 7.69 mg/l |
| 3 Feb 2026, 13:14 | 21.9 | 21.9 mg/l |
| 13 Jan 2026, 16:22 | 6.69 | 6.69 mg/l |
| 1 Dec 2025, 15:18 | 6.09 | 6.09 mg/l |
| 5 Nov 2025, 10:57 | 5.88 | 5.88 mg/l |
| 16 Oct 2025, 14:14 | 5.89 | 5.89 mg/l |
| 4 Apr 2025, 09:34 | 7.99 | 7.99 mg/l |
| 4 Mar 2025, 13:54 | 8.19 | 8.19 mg/l |
| 10 Feb 2025, 11:41 | 8.29 | 8.29 mg/l |
| 2 Jan 2025, 12:56 | 8.29 | 8.29 mg/l |
| 3 Dec 2024, 15:51 | 7.99 | 7.99 mg/l |
| 4 Nov 2024, 11:00 | 7.79 | 7.79 mg/l |
| 11 Oct 2024, 09:59 | 7.99 | 7.99 mg/l |
| 11 Sep 2024, 14:20 | 16 | 16 mg/l |
| 5 Aug 2024, 14:10 | 8.09 | 8.09 mg/l |
| 5 Jul 2024, 09:31 | 7.69 | 7.69 mg/l |
| 5 Jun 2024, 11:25 | 7.89 | 7.89 mg/l |
| 5 Mar 2024, 12:03 | 11 | 11 mg/l |
| 1 Feb 2024, 11:50 | 7.79 | 7.79 mg/l |
| 3 Jan 2024, 10:34 | 7.59 | 7.59 mg/l |
| 8 Dec 2023, 11:42 | 7.48 | 7.48 mg/l |
| 2 Nov 2023, 11:59 | 6.18 | 6.18 mg/l |
| 9 Oct 2023, 14:11 | 6.49 | 6.49 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.029 mg/l
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 0.029 | 0.029 mg/l |
| 5 Aug 2026, 12:39 | 0.016 | 0.016 mg/l |
| 9 Jul 2026, 09:34 | 0.048 | 0.048 mg/l |
| 8 Jun 2026, 11:49 | 0.026 | 0.026 mg/l |
| 15 May 2026, 10:55 | 0.97 | 0.97 mg/l |
| 29 Apr 2026, 09:17 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Mar 2026, 15:20 | 0.024 | 0.024 mg/l |
| 3 Feb 2026, 13:14 | 0.62 | 0.62 mg/l |
| 13 Jan 2026, 16:22 | 0.018 | 0.018 mg/l |
| 1 Dec 2025, 15:18 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Nov 2025, 10:57 | 0.013 | 0.013 mg/l |
| 16 Oct 2025, 14:14 | 0.015 | 0.015 mg/l |
| 4 Apr 2025, 09:34 | 0.019 | 0.019 mg/l |
| 4 Mar 2025, 13:54 | <0.01 | below 0.01 mg/l (not detected above this) |
| 10 Feb 2025, 11:41 | 0.013 | 0.013 mg/l |
| 2 Jan 2025, 12:56 | 0.022 | 0.022 mg/l |
| 3 Dec 2024, 15:51 | 0.015 | 0.015 mg/l |
| 4 Nov 2024, 11:00 | 0.022 | 0.022 mg/l |
| 11 Oct 2024, 09:59 | 0.015 | 0.015 mg/l |
| 11 Sep 2024, 14:20 | 1.9 | 1.9 mg/l |
| 5 Aug 2024, 14:10 | 0.014 | 0.014 mg/l |
| 5 Jul 2024, 09:31 | 0.013 | 0.013 mg/l |
| 5 Jun 2024, 11:25 | 0.012 | 0.012 mg/l |
| 5 Mar 2024, 12:03 | 0.35 | 0.35 mg/l |
| 1 Feb 2024, 11:50 | 0.018 | 0.018 mg/l |
| 3 Jan 2024, 10:34 | 0.021 | 0.021 mg/l |
| 8 Dec 2023, 11:42 | 0.017 | 0.017 mg/l |
| 2 Nov 2023, 11:59 | 0.037 | 0.037 mg/l |
| 9 Oct 2023, 14:11 | 0.016 | 0.016 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
553 µS/cm
Sampled 4 Sep 2026, 27 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:43 | 553 | 553 µS/cm |
| 5 Aug 2026, 12:39 | 630 | 630 µS/cm |
| 9 Jul 2026, 09:34 | 627 | 627 µS/cm |
| 8 Jun 2026, 11:49 | 627 | 627 µS/cm |
| 15 May 2026, 10:55 | 1178 | 1178 µS/cm |
| 29 Apr 2026, 09:17 | 637 | 637 µS/cm |
| 2 Mar 2026, 15:20 | 638 | 638 µS/cm |
| 3 Feb 2026, 13:14 | 1143 | 1143 µS/cm |
| 13 Jan 2026, 16:22 | 628 | 628 µS/cm |
| 1 Dec 2025, 15:18 | 651 | 651 µS/cm |
| 5 Nov 2025, 10:57 | 595 | 595 µS/cm |
| 16 Oct 2025, 14:14 | 599 | 599 µS/cm |
| 4 Apr 2025, 09:34 | 630 | 630 µS/cm |
| 4 Mar 2025, 13:54 | 609 | 609 µS/cm |
| 10 Feb 2025, 11:41 | 637 | 637 µS/cm |
| 2 Jan 2025, 12:56 | 646 | 646 µS/cm |
| 3 Dec 2024, 15:51 | 640 | 640 µS/cm |
| 4 Nov 2024, 11:00 | 636 | 636 µS/cm |
| 11 Oct 2024, 09:59 | 638 | 638 µS/cm |
| 11 Sep 2024, 14:20 | 914 | 914 µS/cm |
| 5 Aug 2024, 14:10 | 635 | 635 µS/cm |
| 5 Jul 2024, 09:31 | 642 | 642 µS/cm |
| 5 Jun 2024, 11:25 | 637 | 637 µS/cm |
| 5 Mar 2024, 12:03 | 991 | 991 µS/cm |
| 1 Feb 2024, 11:50 | 638 | 638 µS/cm |
| 3 Jan 2024, 10:34 | 644 | 644 µS/cm |
| 8 Dec 2023, 11:42 | 650 | 650 µS/cm |
| 2 Nov 2023, 11:59 | 638 | 638 µS/cm |
| 9 Oct 2023, 14:11 | 619 | 619 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 | 29 | Oct 2023 – Sep 2026 | 75.8% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Sep 2026 | 7.64 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Sep 2026 | 14.9 °C 4 Sep 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Sep 2026 | 7.51 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Oct 2023 – Sep 2026 | below 0.03 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Sep 2026 | 5.3 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Sep 2026 | 0.029 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Sep 2026 | 553 µS/cm 4 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Sep 2026 | 220 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 28 | Oct 2023 – Sep 2026 | below 0.00026 mg/l 4 Sep 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Sep 2026 | 0.0044 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Sep 2026 | 5.3 mg/l 4 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.