Holderness Drain at Great Culvert
EA name: HOLDERNESS DRAIN AT GREAT CULVERT
Environment Agency sampling point NE-49100198 · 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
- 22 May 2026, 08:524 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
- 33 since 12 Oct 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 511450, 435594As published, to the nearest 1 m. Open in a map
- River, by its own name
- Holderness Drain
- River, by the map
- Holderness DrainPlaced on the river its name gives, 21 m from the line.
- Next gauge downstream
- East Hull Hedon Road On the Holderness Drain · 7.3 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
108.2%
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 108.2 | 108.2% |
| 5 May 2026, 14:12 | 105.6 | 105.6% |
| 15 Apr 2026, 08:10 | 95.5 | 95.5% |
| 9 Apr 2026, 12:39 | 93.4 | 93.4% |
| 27 Mar 2026, 07:40 | 88 | 88% |
| 24 Mar 2026, 08:23 | 88.2 | 88.2% |
| 4 Mar 2026, 07:50 | 94.2 | 94.2% |
| 19 Feb 2026, 07:50 | 95.4 | 95.4% |
| 11 Feb 2026, 07:55 | 87.6 | 87.6% |
| 16 Dec 2025, 08:14 | 85.6 | 85.6% |
| 4 Dec 2025, 08:22 | 63.8 | 63.8% |
| 28 Nov 2025, 07:47 | 84.3 | 84.3% |
| 11 Nov 2025, 07:46 | 74 | 74% |
| 22 Oct 2025, 07:53 | 58.3 | 58.3% |
| 30 Sep 2025, 07:44 | 52.1 | 52.1% |
| 7 Aug 2025, 07:39 | 47.3 | 47.3% |
| 2 Jul 2025, 07:38 | 52.4 | 52.4% |
| 11 Jun 2025, 07:48 | 116.6 | 116.6% |
| 9 May 2025, 07:51 | 96.7 | 96.7% |
| 4 Apr 2025, 07:36 | 99.7 | 99.7% |
| 13 Mar 2025, 07:47 | 95.9 | 95.9% |
| 25 Feb 2025, 07:43 | 91.3 | 91.3% |
| 21 Jan 2025, 08:03 | 93.9 | 93.9% |
| 4 Dec 2024, 07:42 | 96.3 | 96.3% |
| 29 Nov 2024, 09:03 | 88.7 | 88.7% |
| 9 Oct 2024, 11:14 | 71.2 | 71.2% |
| 15 Jul 2024, 13:21 | 88.9 | 88.9% |
| 5 Mar 2024, 10:13 | 87 | 87% |
| 1 Feb 2024, 08:46 | 90.5 | 90.5% |
| 17 Jan 2024, 08:55 | 93 | 93% |
| 6 Dec 2023, 08:57 | 78.4 | 78.4% |
| 15 Nov 2023, 08:48 | 72.6 | 72.6% |
| 12 Oct 2023, 09:21 | 50.2 | 50.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 10.8 | 10.8 mg/l |
| 5 May 2026, 14:12 | 10.6 | 10.6 mg/l |
| 15 Apr 2026, 08:10 | 10.4 | 10.4 mg/l |
| 9 Apr 2026, 12:39 | 9.95 | 9.95 mg/l |
| 27 Mar 2026, 07:40 | 10.5 | 10.5 mg/l |
| 24 Mar 2026, 08:23 | 10.1 | 10.1 mg/l |
| 4 Mar 2026, 07:50 | 11.5 | 11.5 mg/l |
| 19 Feb 2026, 07:50 | 12.5 | 12.5 mg/l |
| 11 Feb 2026, 07:55 | 10.7 | 10.7 mg/l |
| 16 Dec 2025, 08:14 | 10 | 10 mg/l |
| 4 Dec 2025, 08:22 | 7.87 | 7.87 mg/l |
| 28 Nov 2025, 07:47 | 9.99 | 9.99 mg/l |
| 11 Nov 2025, 07:46 | 8.34 | 8.34 mg/l |
| 22 Oct 2025, 07:53 | 6.46 | 6.46 mg/l |
| 30 Sep 2025, 07:44 | 5.71 | 5.71 mg/l |
| 7 Aug 2025, 07:39 | 4.63 | 4.63 mg/l |
| 2 Jul 2025, 07:38 | 4.81 | 4.81 mg/l |
| 11 Jun 2025, 07:48 | 11.7 | 11.7 mg/l |
| 9 May 2025, 07:51 | 10.7 | 10.7 mg/l |
| 4 Apr 2025, 07:36 | 11.5 | 11.5 mg/l |
| 13 Mar 2025, 07:47 | 12.6 | 12.6 mg/l |
| 25 Feb 2025, 07:43 | 11 | 11 mg/l |
| 21 Jan 2025, 08:03 | 12.2 | 12.2 mg/l |
| 4 Dec 2024, 07:42 | 12.2 | 12.2 mg/l |
| 29 Nov 2024, 09:03 | 11.4 | 11.4 mg/l |
| 9 Oct 2024, 11:14 | 7.4 | 7.4 mg/l |
| 15 Jul 2024, 13:21 | 8.68 | 8.68 mg/l |
| 5 Mar 2024, 10:13 | 10.7 | 10.7 mg/l |
| 1 Feb 2024, 08:46 | 11.8 | 11.8 mg/l |
| 17 Jan 2024, 08:55 | 13.3 | 13.3 mg/l |
| 6 Dec 2023, 08:57 | 10.3 | 10.3 mg/l |
| 15 Nov 2023, 08:48 | 8.42 | 8.42 mg/l |
| 12 Oct 2023, 09:21 | 5.34 | 5.34 mg/l |
Water temperature
code 0076 · °C
15.5 °C
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 15.5 | 15.5 °C |
| 5 May 2026, 14:12 | 14.9 | 14.9 °C |
| 15 Apr 2026, 08:10 | 11.5 | 11.5 °C |
| 9 Apr 2026, 12:39 | 12.4 | 12.4 °C |
| 27 Mar 2026, 07:40 | 7.5 | 7.5 °C |
| 24 Mar 2026, 08:23 | 9.2 | 9.2 °C |
| 4 Mar 2026, 07:50 | 6.7 | 6.7 °C |
| 19 Feb 2026, 07:50 | 3.9 | 3.9 °C |
| 11 Feb 2026, 07:55 | 6.7 | 6.7 °C |
| 16 Dec 2025, 08:14 | 8.4 | 8.4 °C |
| 4 Dec 2025, 08:22 | 6.3 | 6.3 °C |
| 28 Nov 2025, 07:47 | 7.9 | 7.9 °C |
| 11 Nov 2025, 07:46 | 10 | 10 °C |
| 22 Oct 2025, 07:53 | 10.7 | 10.7 °C |
| 30 Sep 2025, 07:44 | 11.2 | 11.2 °C |
| 7 Aug 2025, 07:39 | 16.3 | 16.3 °C |
| 2 Jul 2025, 07:38 | 19.4 | 19.4 °C |
| 11 Jun 2025, 07:48 | 15 | 15 °C |
| 9 May 2025, 07:51 | 10.9 | 10.9 °C |
| 4 Apr 2025, 07:36 | 9.1 | 9.1 °C |
| 13 Mar 2025, 07:47 | 4 | 4 °C |
| 25 Feb 2025, 07:43 | 7.3 | 7.3 °C |
| 21 Jan 2025, 08:03 | 4.4 | 4.4 °C |
| 4 Dec 2024, 07:42 | 5.3 | 5.3 °C |
| 29 Nov 2024, 09:03 | 4.6 | 4.6 °C |
| 9 Oct 2024, 11:14 | 13.5 | 13.5 °C |
| 15 Jul 2024, 13:21 | 16.4 | 16.4 °C |
| 5 Mar 2024, 10:13 | 6.6 | 6.6 °C |
| 1 Feb 2024, 08:46 | 4 | 4 °C |
| 17 Jan 2024, 08:55 | 0.6 | 0.6 °C |
| 6 Dec 2023, 08:57 | 3.7 | 3.7 °C |
| 15 Nov 2023, 08:48 | 8.8 | 8.8 °C |
| 12 Oct 2023, 09:21 | 12.5 | 12.5 °C |
pH
code 0061
7.79
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 7.79 | 7.79 |
| 5 May 2026, 14:12 | 7.95 | 7.95 |
| 15 Apr 2026, 08:10 | 7.89 | 7.89 |
| 9 Apr 2026, 12:39 | 7.72 | 7.72 |
| 27 Mar 2026, 07:40 | 7.71 | 7.71 |
| 24 Mar 2026, 08:23 | 7.54 | 7.54 |
| 4 Mar 2026, 07:50 | 7.88 | 7.88 |
| 19 Feb 2026, 07:50 | 7.96 | 7.96 |
| 11 Feb 2026, 07:55 | 7.73 | 7.73 |
| 16 Dec 2025, 08:14 | 7.83 | 7.83 |
| 4 Dec 2025, 08:22 | 7.38 | 7.38 |
| 28 Nov 2025, 07:47 | 7.86 | 7.86 |
| 11 Nov 2025, 07:46 | 7.69 | 7.69 |
| 22 Oct 2025, 07:53 | 7.75 | 7.75 |
| 30 Sep 2025, 07:44 | 7.54 | 7.54 |
| 7 Aug 2025, 07:39 | 7.55 | 7.55 |
| 2 Jul 2025, 07:38 | 7.59 | 7.59 |
| 11 Jun 2025, 07:48 | 8.13 | 8.13 |
| 9 May 2025, 07:51 | 8.18 | 8.18 |
| 4 Apr 2025, 07:36 | 8.1 | 8.1 |
| 13 Mar 2025, 07:47 | 8.29 | 8.29 |
| 25 Feb 2025, 07:43 | 7.7 | 7.7 |
| 21 Jan 2025, 08:03 | 7.88 | 7.88 |
| 4 Dec 2024, 07:42 | 7.94 | 7.94 |
| 29 Nov 2024, 09:03 | 7.75 | 7.75 |
| 9 Oct 2024, 11:14 | 7.85 | 7.85 |
| 15 Jul 2024, 13:21 | 7.82 | 7.82 |
| 5 Mar 2024, 10:13 | 7.76 | 7.76 |
| 1 Feb 2024, 08:46 | 7.89 | 7.89 |
| 17 Jan 2024, 08:55 | 8.07 | 8.07 |
| 6 Dec 2023, 08:57 | 7.65 | 7.65 |
| 15 Nov 2023, 08:48 | 7.75 | 7.75 |
| 12 Oct 2023, 09:21 | 7.66 | 7.66 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.063 mg/l
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 0.063 | 0.063 mg/l |
| 5 May 2026, 14:12 | 0.082 | 0.082 mg/l |
| 15 Apr 2026, 08:10 | 0.28 | 0.28 mg/l |
| 9 Apr 2026, 12:39 | 0.31 | 0.31 mg/l |
| 27 Mar 2026, 07:40 | 0.55 | 0.55 mg/l |
| 24 Mar 2026, 08:23 | 0.85 | 0.85 mg/l |
| 4 Mar 2026, 07:50 | 0.067 | 0.067 mg/l |
| 19 Feb 2026, 07:50 | 0.086 | 0.086 mg/l |
| 11 Feb 2026, 07:55 | 0.076 | 0.076 mg/l |
| 16 Dec 2025, 08:14 | 0.14 | 0.14 mg/l |
| 4 Dec 2025, 08:22 | 0.1 | 0.1 mg/l |
| 28 Nov 2025, 07:47 | 0.079 | 0.079 mg/l |
| 11 Nov 2025, 07:46 | 0.14 | 0.14 mg/l |
| 22 Oct 2025, 07:53 | 0.081 | 0.081 mg/l |
| 30 Sep 2025, 07:44 | 0.13 | 0.13 mg/l |
| 7 Aug 2025, 07:39 | 0.063 | 0.063 mg/l |
| 2 Jul 2025, 07:38 | 0.19 | 0.19 mg/l |
| 11 Jun 2025, 07:48 | 0.081 | 0.081 mg/l |
| 9 May 2025, 07:51 | 4.1 | 4.1 mg/l |
| 4 Apr 2025, 07:36 | 0.17 | 0.17 mg/l |
| 13 Mar 2025, 07:47 | 0.21 | 0.21 mg/l |
| 25 Feb 2025, 07:43 | 0.59 | 0.59 mg/l |
| 21 Jan 2025, 08:03 | 0.36 | 0.36 mg/l |
| 4 Dec 2024, 07:42 | 0.14 | 0.14 mg/l |
| 29 Nov 2024, 09:03 | 0.18 | 0.18 mg/l |
| 9 Oct 2024, 11:14 | 0.074 | 0.074 mg/l |
| 15 Jul 2024, 13:21 | 0.071 | 0.071 mg/l |
| 5 Mar 2024, 10:13 | 0.59 | 0.59 mg/l |
| 1 Feb 2024, 08:46 | 0.24 | 0.24 mg/l |
| 17 Jan 2024, 08:55 | 0.45 | 0.45 mg/l |
| 6 Dec 2023, 08:57 | 0.15 | 0.15 mg/l |
| 15 Nov 2023, 08:48 | 0.09 | 0.09 mg/l |
| 12 Oct 2023, 09:21 | 0.058 | 0.058 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.48 mg/l
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 2.48 | 2.48 mg/l |
| 5 May 2026, 14:12 | 3.07 | 3.07 mg/l |
| 15 Apr 2026, 08:10 | 4.67 | 4.67 mg/l |
| 9 Apr 2026, 12:39 | 4.86 | 4.86 mg/l |
| 27 Mar 2026, 07:40 | 6.25 | 6.25 mg/l |
| 24 Mar 2026, 08:23 | 6.94 | 6.94 mg/l |
| 4 Mar 2026, 07:50 | 7.66 | 7.66 mg/l |
| 19 Feb 2026, 07:50 | 7.08 | 7.08 mg/l |
| 11 Feb 2026, 07:55 | 7.86 | 7.86 mg/l |
| 16 Dec 2025, 08:14 | 8.08 | 8.08 mg/l |
| 4 Dec 2025, 08:22 | 11 | 11 mg/l |
| 28 Nov 2025, 07:47 | 13.9 | 13.9 mg/l |
| 11 Nov 2025, 07:46 | 16.9 | 16.9 mg/l |
| 22 Oct 2025, 07:53 | 0.643 | 0.643 mg/l |
| 30 Sep 2025, 07:44 | 1.36 | 1.36 mg/l |
| 7 Aug 2025, 07:39 | 0.19 | 0.19 mg/l |
| 2 Jul 2025, 07:38 | 0.247 | 0.247 mg/l |
| 11 Jun 2025, 07:48 | 0.331 | 0.331 mg/l |
| 9 May 2025, 07:51 | 5.07 | 5.07 mg/l |
| 4 Apr 2025, 07:36 | 5.66 | 5.66 mg/l |
| 13 Mar 2025, 07:47 | 7.55 | 7.55 mg/l |
| 25 Feb 2025, 07:43 | 6.05 | 6.05 mg/l |
| 21 Jan 2025, 08:03 | 7.94 | 7.94 mg/l |
| 4 Dec 2024, 07:42 | 10.9 | 10.9 mg/l |
| 29 Nov 2024, 09:03 | 11.9 | 11.9 mg/l |
| 9 Oct 2024, 11:14 | 7.82 | 7.82 mg/l |
| 15 Jul 2024, 13:21 | 6.21 | 6.21 mg/l |
| 5 Mar 2024, 10:13 | 6.63 | 6.63 mg/l |
| 1 Feb 2024, 08:46 | 7.35 | 7.35 mg/l |
| 17 Jan 2024, 08:55 | 6.57 | 6.57 mg/l |
| 6 Dec 2023, 08:57 | 7.67 | 7.67 mg/l |
| 15 Nov 2023, 08:48 | 8.55 | 8.55 mg/l |
| 12 Oct 2023, 09:21 | 5.57 | 5.57 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.011 mg/l
Sampled 22 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 0.011 | 0.011 mg/l |
| 5 May 2026, 14:12 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 Apr 2026, 08:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Apr 2026, 12:39 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Mar 2026, 07:40 | 0.013 | 0.013 mg/l |
| 24 Mar 2026, 08:23 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2026, 07:50 | 0.099 | 0.099 mg/l |
| 19 Feb 2026, 07:50 | 0.091 | 0.091 mg/l |
| 11 Feb 2026, 07:55 | 0.076 | 0.076 mg/l |
| 16 Dec 2025, 08:14 | 0.14 | 0.14 mg/l |
| 4 Dec 2025, 08:22 | 0.097 | 0.097 mg/l |
| 28 Nov 2025, 07:47 | 0.1 | 0.1 mg/l |
| 11 Nov 2025, 07:46 | 0.24 | 0.24 mg/l |
| 22 Oct 2025, 07:53 | 0.15 | 0.15 mg/l |
| 30 Sep 2025, 07:44 | 0.15 | 0.15 mg/l |
| 7 Aug 2025, 07:39 | 0.24 | 0.24 mg/l |
| 2 Jul 2025, 07:38 | 0.41 | 0.41 mg/l |
| 11 Jun 2025, 07:48 | 0.011 | 0.011 mg/l |
| 9 May 2025, 07:51 | 0.22 | 0.22 mg/l |
| 4 Apr 2025, 07:36 | 0.09 | 0.09 mg/l |
| 13 Mar 2025, 07:47 | 0.11 | 0.11 mg/l |
| 25 Feb 2025, 07:43 | 0.041 | 0.041 mg/l |
| 21 Jan 2025, 08:03 | 0.096 | 0.096 mg/l |
| 29 Nov 2024, 09:03 | 0.11 | 0.11 mg/l |
| 9 Oct 2024, 11:14 | 0.19 | 0.19 mg/l |
| 15 Jul 2024, 13:21 | 0.22 | 0.22 mg/l |
| 5 Mar 2024, 10:13 | 0.065 | 0.065 mg/l |
| 1 Feb 2024, 08:46 | 0.057 | 0.057 mg/l |
| 17 Jan 2024, 08:55 | 0.073 | 0.073 mg/l |
| 6 Dec 2023, 08:57 | 0.081 | 0.081 mg/l |
| 15 Nov 2023, 08:48 | 0.14 | 0.14 mg/l |
| 12 Oct 2023, 09:21 | 0.21 | 0.21 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1001 µS/cm
Sampled 22 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 08:52 | 1001 | 1001 µS/cm |
| 5 May 2026, 14:12 | 1082 | 1082 µS/cm |
| 15 Apr 2026, 08:10 | 1059 | 1059 µS/cm |
| 9 Apr 2026, 12:39 | 1097 | 1097 µS/cm |
| 27 Mar 2026, 07:40 | 1005 | 1005 µS/cm |
| 24 Mar 2026, 08:23 | 1037 | 1037 µS/cm |
| 4 Mar 2026, 07:50 | 811 | 811 µS/cm |
| 19 Feb 2026, 07:50 | 680 | 680 µS/cm |
| 11 Feb 2026, 07:55 | 859 | 859 µS/cm |
| 16 Dec 2025, 08:14 | 670 | 670 µS/cm |
| 4 Dec 2025, 08:22 | 598 | 598 µS/cm |
| 28 Nov 2025, 07:47 | 697 | 697 µS/cm |
| 11 Nov 2025, 07:46 | 629 | 629 µS/cm |
| 22 Oct 2025, 07:53 | 999 | 999 µS/cm |
| 30 Sep 2025, 07:44 | 812 | 812 µS/cm |
| 7 Aug 2025, 07:39 | 874 | 874 µS/cm |
| 2 Jul 2025, 07:38 | 951 | 951 µS/cm |
| 11 Jun 2025, 07:48 | 1039 | 1039 µS/cm |
| 9 May 2025, 07:51 | 1039 | 1039 µS/cm |
| 4 Apr 2025, 07:36 | 1010 | 1010 µS/cm |
| 13 Mar 2025, 07:47 | 938 | 938 µS/cm |
| 25 Feb 2025, 07:43 | 917 | 917 µS/cm |
| 21 Jan 2025, 08:03 | 1196 | 1196 µS/cm |
| 4 Dec 2024, 07:42 | 891 | 891 µS/cm |
| 29 Nov 2024, 09:03 | 828 | 828 µS/cm |
| 9 Oct 2024, 11:14 | 956 | 956 µS/cm |
| 15 Jul 2024, 13:21 | 775 | 775 µS/cm |
| 5 Mar 2024, 10:13 | 821 | 821 µS/cm |
| 1 Feb 2024, 08:46 | 826 | 826 µS/cm |
| 17 Jan 2024, 08:55 | 807 | 807 µS/cm |
| 6 Dec 2023, 08:57 | 554 | 554 µS/cm |
| 15 Nov 2023, 08:48 | 686 | 686 µS/cm |
| 12 Oct 2023, 09:21 | 969 | 969 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – May 2026 | 108.2% 22 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – May 2026 | 10.8 mg/l 22 May 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – May 2026 | 15.5 °C 22 May 2026 |
| pH 0061 | River water | 33 | Oct 2023 – May 2026 | 7.79 22 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – May 2026 | 0.063 mg/l 22 May 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – May 2026 | 2.48 mg/l 22 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Oct 2023 – May 2026 | 0.011 mg/l 22 May 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – May 2026 | 1001 µS/cm 22 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – May 2026 | 240 mg/l 22 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – May 2026 | 0.00107 mg/l 22 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Jul 2024 – May 2026 | 2 mg/l 22 May 2026 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – May 2026 | 0.018 mg/l 22 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – May 2026 | 2.5 mg/l 22 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.