River Wissey A10 Road Bridge Hilgay
EA name: R.WISSEY A10 RD.BR.HILGAY
Environment Agency sampling point AN-50M02 · 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
- 11 May 2026, 17:105 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
- 26 since 6 Nov 2023 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 562100, 298800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Wissey
- River, by the map
- River WisseyPlaced on the river its name gives, 32 m from the line.
- Next gauge downstream
- Freebridge On the River Great Ouse · 24 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Wissey Sluice On the River Wissey · 11 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.5%
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 99.5 | 99.5% |
| 10 Apr 2026, 09:54 | 94 | 94% |
| 9 Mar 2026, 15:12 | 94.4 | 94.4% |
| 5 Feb 2026, 12:11 | 90.3 | 90.3% |
| 12 Jan 2026, 10:51 | 89.1 | 89.1% |
| 4 Dec 2025, 15:17 | 72.1 | 72.1% |
| 11 Nov 2025, 12:22 | 59.8 | 59.8% |
| 28 Oct 2025, 11:48 | 81.4 | 81.4% |
| 3 Sep 2025, 08:41 | 75.2 | 75.2% |
| 6 Aug 2025, 11:20 | 93.2 | 93.2% |
| 8 Jul 2025, 13:38 | 120.5 | 120.5% |
| 5 Jun 2025, 16:15 | 121.8 | 121.8% |
| 6 May 2025, 10:33 | 113.9 | 113.9% |
| 7 Apr 2025, 12:13 | 110.9 | 110.9% |
| 6 Mar 2025, 17:54 | 102.3 | 102.3% |
| 5 Feb 2025, 08:31 | 83.8 | 83.8% |
| 20 Jan 2025, 16:38 | 90.1 | 90.1% |
| 3 Dec 2024, 12:45 | 79 | 79% |
| 18 Nov 2024, 10:01 | 77.6 | 77.6% |
| 14 Oct 2024, 14:04 | 94.7 | 94.7% |
| 16 Sep 2024, 13:28 | 103.8 | 103.8% |
| 19 Aug 2024, 15:51 | 124.9 | 124.9% |
| 15 Jul 2024, 12:14 | 109.1 | 109.1% |
| 17 Jun 2024, 14:09 | 129.1 | 129.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 10.1 | 10.1 mg/l |
| 10 Apr 2026, 09:54 | 10.1 | 10.1 mg/l |
| 9 Mar 2026, 15:12 | 10.8 | 10.8 mg/l |
| 5 Feb 2026, 12:11 | 11.2 | 11.2 mg/l |
| 12 Jan 2026, 10:51 | 11.4 | 11.4 mg/l |
| 4 Dec 2025, 15:17 | 8.65 | 8.65 mg/l |
| 11 Nov 2025, 12:22 | 6.5 | 6.5 mg/l |
| 28 Oct 2025, 11:48 | 9.08 | 9.08 mg/l |
| 3 Sep 2025, 08:41 | 7.09 | 7.09 mg/l |
| 6 Aug 2025, 11:20 | 8.75 | 8.75 mg/l |
| 8 Jul 2025, 13:38 | 10.8 | 10.8 mg/l |
| 5 Jun 2025, 16:15 | 11.6 | 11.6 mg/l |
| 6 May 2025, 10:33 | 11.5 | 11.5 mg/l |
| 7 Apr 2025, 12:13 | 11.8 | 11.8 mg/l |
| 6 Mar 2025, 17:54 | 12.1 | 12.1 mg/l |
| 5 Feb 2025, 08:31 | 10.7 | 10.7 mg/l |
| 20 Jan 2025, 16:38 | 11.3 | 11.3 mg/l |
| 3 Dec 2024, 12:45 | 9.36 | 9.36 mg/l |
| 18 Nov 2024, 10:01 | 9.27 | 9.27 mg/l |
| 14 Oct 2024, 14:04 | 10.6 | 10.6 mg/l |
| 16 Sep 2024, 13:28 | 10.3 | 10.3 mg/l |
| 19 Aug 2024, 15:51 | 11.1 | 11.1 mg/l |
| 15 Jul 2024, 12:14 | 10.3 | 10.3 mg/l |
| 17 Jun 2024, 14:09 | 12.2 | 12.2 mg/l |
Water temperature
code 0076 · °C
14.5 °C
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 14.5 | 14.5 °C |
| 10 Apr 2026, 09:54 | 11.9 | 11.9 °C |
| 9 Mar 2026, 15:12 | 9.5 | 9.5 °C |
| 5 Feb 2026, 12:11 | 6.2 | 6.2 °C |
| 12 Jan 2026, 10:51 | 4.9 | 4.9 °C |
| 4 Dec 2025, 15:17 | 7.4 | 7.4 °C |
| 11 Nov 2025, 12:22 | 11.5 | 11.5 °C |
| 28 Oct 2025, 11:48 | 10.4 | 10.4 °C |
| 3 Sep 2025, 08:41 | 18.1 | 18.1 °C |
| 6 Aug 2025, 11:20 | 18.3 | 18.3 °C |
| 8 Jul 2025, 13:38 | 20.7 | 20.7 °C |
| 5 Jun 2025, 16:15 | 17.5 | 17.5 °C |
| 6 May 2025, 10:33 | 14.9 | 14.9 °C |
| 7 Apr 2025, 12:13 | 12.3 | 12.3 °C |
| 6 Mar 2025, 17:54 | 8 | 8 °C |
| 5 Feb 2025, 08:31 | 4.9 | 4.9 °C |
| 20 Jan 2025, 16:38 | 5.7 | 5.7 °C |
| 3 Dec 2024, 12:45 | 7.9 | 7.9 °C |
| 18 Nov 2024, 10:01 | 7.6 | 7.6 °C |
| 14 Oct 2024, 14:04 | 10.3 | 10.3 °C |
| 16 Sep 2024, 13:28 | 15.6 | 15.6 °C |
| 19 Aug 2024, 15:51 | 21.2 | 21.2 °C |
| 15 Jul 2024, 12:14 | 18 | 18 °C |
| 17 Jun 2024, 14:09 | 17.9 | 17.9 °C |
pH
code 0061
8.11
Sampled 11 May 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 8.11 | 8.11 |
| 10 Apr 2026, 09:54 | 8.22 | 8.22 |
| 9 Mar 2026, 15:12 | 7.98 | 7.98 |
| 5 Feb 2026, 12:11 | 8.03 | 8.03 |
| 12 Jan 2026, 10:51 | 7.66 | 7.66 |
| 4 Dec 2025, 15:17 | 7.65 | 7.65 |
| 11 Nov 2025, 12:22 | 7.87 | 7.87 |
| 28 Oct 2025, 11:48 | 7.98 | 7.98 |
| 3 Sep 2025, 08:41 | 7.32 | 7.32 |
| 6 Aug 2025, 11:20 | 8.01 | 8.01 |
| 8 Jul 2025, 13:38 | 7.99 | 7.99 |
| 5 Jun 2025, 16:15 | 8.22 | 8.22 |
| 6 May 2025, 10:33 | 8.18 | 8.18 |
| 7 Apr 2025, 12:13 | 8.21 | 8.21 |
| 6 Mar 2025, 17:54 | 8.07 | 8.07 |
| 5 Feb 2025, 08:31 | 8.01 | 8.01 |
| 20 Jan 2025, 16:38 | 7.97 | 7.97 |
| 3 Dec 2024, 12:45 | 7.88 | 7.88 |
| 18 Nov 2024, 10:01 | 7.9 | 7.9 |
| 14 Oct 2024, 14:04 | 7.9 | 7.9 |
| 16 Sep 2024, 13:28 | 7.94 | 7.94 |
| 19 Aug 2024, 15:51 | 8.09 | 8.09 |
| 15 Jul 2024, 12:14 | 8.02 | 8.02 |
| 17 Jun 2024, 14:09 | 8.38 | 8.38 |
| 5 Mar 2024, 15:05 | 7.87 | 7.87 |
| 6 Nov 2023, 15:40 | 7.61 | 7.61 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2026, 09:54 | 0.075 | 0.075 mg/l |
| 9 Mar 2026, 15:12 | 0.047 | 0.047 mg/l |
| 5 Feb 2026, 12:11 | 0.064 | 0.064 mg/l |
| 12 Jan 2026, 10:51 | 0.16 | 0.16 mg/l |
| 4 Dec 2025, 15:17 | 0.2 | 0.2 mg/l |
| 11 Nov 2025, 12:22 | 0.097 | 0.097 mg/l |
| 28 Oct 2025, 11:48 | 0.052 | 0.052 mg/l |
| 3 Sep 2025, 08:41 | 0.11 | 0.11 mg/l |
| 6 Aug 2025, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2025, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2025, 16:15 | 0.03 | 0.03 mg/l |
| 6 May 2025, 10:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2025, 12:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 17:54 | 0.044 | 0.044 mg/l |
| 5 Feb 2025, 08:31 | 0.078 | 0.078 mg/l |
| 20 Jan 2025, 16:38 | 0.071 | 0.071 mg/l |
| 3 Dec 2024, 12:45 | 0.11 | 0.11 mg/l |
| 18 Nov 2024, 10:01 | 0.063 | 0.063 mg/l |
| 14 Oct 2024, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 13:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 15:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 12:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.68 mg/l
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 7.68 | 7.68 mg/l |
| 10 Apr 2026, 09:54 | 8.45 | 8.45 mg/l |
| 9 Mar 2026, 15:12 | 9.48 | 9.48 mg/l |
| 5 Feb 2026, 12:11 | 9.97 | 9.97 mg/l |
| 12 Jan 2026, 10:51 | 11 | 11 mg/l |
| 4 Dec 2025, 15:17 | 9.01 | 9.01 mg/l |
| 11 Nov 2025, 12:22 | 4.77 | 4.77 mg/l |
| 28 Oct 2025, 11:48 | 4.74 | 4.74 mg/l |
| 3 Sep 2025, 08:41 | 0.309 | 0.309 mg/l |
| 6 Aug 2025, 11:20 | 1.58 | 1.58 mg/l |
| 8 Jul 2025, 13:38 | 4.05 | 4.05 mg/l |
| 5 Jun 2025, 16:15 | 6.35 | 6.35 mg/l |
| 6 May 2025, 10:33 | 7.77 | 7.77 mg/l |
| 7 Apr 2025, 12:13 | 8.86 | 8.86 mg/l |
| 6 Mar 2025, 17:54 | 9.18 | 9.18 mg/l |
| 5 Feb 2025, 08:31 | 12 | 12 mg/l |
| 20 Jan 2025, 16:38 | 9.36 | 9.36 mg/l |
| 3 Dec 2024, 12:45 | 8.4 | 8.4 mg/l |
| 18 Nov 2024, 10:01 | 0.928 | 0.928 mg/l |
| 14 Oct 2024, 14:04 | 6.66 | 6.66 mg/l |
| 16 Sep 2024, 13:28 | 6.07 | 6.07 mg/l |
| 19 Aug 2024, 15:51 | 4.58 | 4.58 mg/l |
| 15 Jul 2024, 12:14 | 6.16 | 6.16 mg/l |
| 17 Jun 2024, 14:09 | 6.88 | 6.88 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.03 mg/l
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 0.03 | 0.03 mg/l |
| 10 Apr 2026, 09:54 | 0.017 | 0.017 mg/l |
| 9 Mar 2026, 15:12 | 0.03 | 0.03 mg/l |
| 5 Feb 2026, 12:11 | 0.041 | 0.041 mg/l |
| 12 Jan 2026, 10:51 | 0.063 | 0.063 mg/l |
| 4 Dec 2025, 15:17 | 0.05 | 0.05 mg/l |
| 11 Nov 2025, 12:22 | 0.043 | 0.043 mg/l |
| 28 Oct 2025, 11:48 | 0.028 | 0.028 mg/l |
| 3 Sep 2025, 08:41 | 0.17 | 0.17 mg/l |
| 6 Aug 2025, 11:20 | 0.053 | 0.053 mg/l |
| 8 Jul 2025, 13:38 | 0.019 | 0.019 mg/l |
| 5 Jun 2025, 16:15 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 May 2025, 10:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Apr 2025, 12:13 | 0.016 | 0.016 mg/l |
| 6 Mar 2025, 17:54 | 0.029 | 0.029 mg/l |
| 5 Feb 2025, 08:31 | 0.079 | 0.079 mg/l |
| 20 Jan 2025, 16:38 | 0.057 | 0.057 mg/l |
| 3 Dec 2024, 12:45 | 0.053 | 0.053 mg/l |
| 18 Nov 2024, 10:01 | 0.04 | 0.04 mg/l |
| 14 Oct 2024, 14:04 | 0.041 | 0.041 mg/l |
| 16 Sep 2024, 13:28 | 0.017 | 0.017 mg/l |
| 19 Aug 2024, 15:51 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 Jul 2024, 12:14 | 0.023 | 0.023 mg/l |
| 17 Jun 2024, 14:09 | 0.012 | 0.012 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
849 µS/cm
Sampled 11 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 17:10 | 849 | 849 µS/cm |
| 10 Apr 2026, 09:54 | 801 | 801 µS/cm |
| 9 Mar 2026, 15:12 | 863 | 863 µS/cm |
| 5 Feb 2026, 12:11 | 822 | 822 µS/cm |
| 12 Jan 2026, 10:51 | 911 | 911 µS/cm |
| 4 Dec 2025, 15:17 | 1038 | 1038 µS/cm |
| 11 Nov 2025, 12:22 | 1042 | 1042 µS/cm |
| 28 Oct 2025, 11:48 | 1058 | 1058 µS/cm |
| 3 Sep 2025, 08:41 | 721 | 721 µS/cm |
| 6 Aug 2025, 11:20 | 816 | 816 µS/cm |
| 8 Jul 2025, 13:38 | 809 | 809 µS/cm |
| 5 Jun 2025, 16:15 | 882 | 882 µS/cm |
| 6 May 2025, 10:33 | 774 | 774 µS/cm |
| 7 Apr 2025, 12:13 | 783 | 783 µS/cm |
| 6 Mar 2025, 17:54 | 743 | 743 µS/cm |
| 5 Feb 2025, 08:31 | 822 | 822 µS/cm |
| 20 Jan 2025, 16:38 | 784 | 784 µS/cm |
| 3 Dec 2024, 12:45 | 815 | 815 µS/cm |
| 18 Nov 2024, 10:01 | 828 | 828 µS/cm |
| 14 Oct 2024, 14:04 | 814 | 814 µS/cm |
| 16 Sep 2024, 13:28 | 894 | 894 µS/cm |
| 19 Aug 2024, 15:51 | 634 | 634 µS/cm |
| 15 Jul 2024, 12:14 | 725 | 725 µS/cm |
| 17 Jun 2024, 14:09 | 836 | 836 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 | 24 | Jun 2024 – May 2026 | 99.5% 11 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 10.1 mg/l 11 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 14.5 °C 11 May 2026 |
| pH 0061 | River water | 26 | Nov 2023 – May 2026 | 8.11 11 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 11 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 7.68 mg/l 11 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.03 mg/l 11 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 849 µS/cm 11 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 310 mg/l 11 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00076 mg/l 11 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.8 mg/l 11 May 2026 |
| Cadmium, Dissolved 0106 | River water | 2 | Nov 2023 – Mar 2024 | below 0.01 µg/l 5 Mar 2024 |
| Calcium, Dissolved 0239 | River water | 2 | Nov 2023 – Mar 2024 | 130 mg/l 5 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Nov 2023 – Mar 2024 | 10 mg/l 5 Mar 2024 |
| Magnesium, Dissolved 0235 | River water | 2 | Nov 2023 – Mar 2024 | 3.9 mg/l 5 Mar 2024 |
| Mercury, Dissolved 0103 | River water | 2 | Nov 2023 – Mar 2024 | below 0.01 µg/l 5 Mar 2024 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.024 mg/l 11 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 7.7 mg/l 11 May 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.