River Gannel upstream of Fraddon sewage treatment works
EA name: RIVER GANNEL U/S FRADDON STW (also listed as “RIVER GANNEL ABOVE FRADDON STW”)
Environment Agency sampling point SW-82410291 · 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
- 20 Aug 2026, 14:4042 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 25 Jun 2024 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 190450, 57700As published, to the nearest 10 m. Open in a map
- River, by its own name
- Gannel
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Planned investigation (local monitoring) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.7%
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 89.7 | 89.7% |
| 7 Jul 2026, 17:00 | 98.5 | 98.5% |
| 8 Jun 2026, 14:41 | 93.5 | 93.5% |
| 11 May 2026, 09:27 | 97.9 | 97.9% |
| 1 Apr 2026, 14:08 | 99.1 | 99.1% |
| 3 Mar 2026, 09:31 | 100.6 | 100.6% |
| 4 Feb 2026, 10:16 | 98.1 | 98.1% |
| 7 Jan 2026, 12:06 | 98.5 | 98.5% |
| 5 Dec 2025, 09:30 | 94.1 | 94.1% |
| 14 Nov 2025, 14:42 | 92.2 | 92.2% |
| 2 Oct 2025, 09:30 | 98 | 98% |
| 1 Sep 2025, 08:28 | 94 | 94% |
| 7 Aug 2025, 09:55 | 97 | 97% |
| 22 Jul 2025, 09:56 | 93.8 | 93.8% |
| 25 Jun 2025, 09:14 | 96.2 | 96.2% |
| 30 May 2025, 09:12 | 96.8 | 96.8% |
| 8 Apr 2025, 13:54 | 95.3 | 95.3% |
| 19 Mar 2025, 09:05 | 99.4 | 99.4% |
| 6 Feb 2025, 12:55 | 98.6 | 98.6% |
| 23 Jan 2025, 09:33 | 98.8 | 98.8% |
| 5 Dec 2024, 09:02 | 98 | 98% |
| 20 Nov 2024, 11:41 | 96.4 | 96.4% |
| 21 Oct 2024, 12:02 | 96.1 | 96.1% |
| 18 Sep 2024, 09:53 | 96 | 96% |
| 19 Aug 2024, 14:53 | 96.5 | 96.5% |
| 17 Jul 2024, 08:24 | 95.5 | 95.5% |
| 25 Jun 2024, 11:23 | 97.2 | 97.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.76 mg/l
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 8.76 | 8.76 mg/l |
| 7 Jul 2026, 17:00 | 9.44 | 9.44 mg/l |
| 8 Jun 2026, 14:41 | 9.65 | 9.65 mg/l |
| 11 May 2026, 09:27 | 10.8 | 10.8 mg/l |
| 1 Apr 2026, 14:08 | 10.6 | 10.6 mg/l |
| 3 Mar 2026, 09:31 | 11.1 | 11.1 mg/l |
| 4 Feb 2026, 10:16 | 10.9 | 10.9 mg/l |
| 7 Jan 2026, 12:06 | 11.1 | 11.1 mg/l |
| 5 Dec 2025, 09:30 | 10.5 | 10.5 mg/l |
| 14 Nov 2025, 14:42 | 9.56 | 9.56 mg/l |
| 2 Oct 2025, 09:30 | 10.3 | 10.3 mg/l |
| 1 Sep 2025, 08:28 | 9.6 | 9.6 mg/l |
| 7 Aug 2025, 09:55 | 9.84 | 9.84 mg/l |
| 22 Jul 2025, 09:56 | 9.45 | 9.45 mg/l |
| 25 Jun 2025, 09:14 | 9.82 | 9.82 mg/l |
| 30 May 2025, 09:12 | 10 | 10 mg/l |
| 8 Apr 2025, 13:54 | 9.93 | 9.93 mg/l |
| 19 Mar 2025, 09:05 | 11.3 | 11.3 mg/l |
| 6 Feb 2025, 12:55 | 11.3 | 11.3 mg/l |
| 23 Jan 2025, 09:33 | 11.2 | 11.2 mg/l |
| 5 Dec 2024, 09:02 | 10.5 | 10.5 mg/l |
| 20 Nov 2024, 11:41 | 11 | 11 mg/l |
| 21 Oct 2024, 12:02 | 10.1 | 10.1 mg/l |
| 18 Sep 2024, 09:53 | 9.93 | 9.93 mg/l |
| 19 Aug 2024, 14:53 | 9.66 | 9.66 mg/l |
| 17 Jul 2024, 08:24 | 9.95 | 9.95 mg/l |
| 25 Jun 2024, 11:23 | 9.97 | 9.97 mg/l |
Water temperature
code 0076 · °C
16.4 °C
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 16.4 | 16.4 °C |
| 7 Jul 2026, 17:00 | 17.3 | 17.3 °C |
| 8 Jun 2026, 14:41 | 13.8 | 13.8 °C |
| 11 May 2026, 09:27 | 11 | 11 °C |
| 1 Apr 2026, 14:08 | 12.2 | 12.2 °C |
| 3 Mar 2026, 09:31 | 10.9 | 10.9 °C |
| 4 Feb 2026, 10:16 | 10.5 | 10.5 °C |
| 7 Jan 2026, 12:06 | 10.1 | 10.1 °C |
| 5 Dec 2025, 09:30 | 10.3 | 10.3 °C |
| 14 Nov 2025, 14:42 | 13.6 | 13.6 °C |
| 2 Oct 2025, 09:30 | 12.9 | 12.9 °C |
| 1 Sep 2025, 08:28 | 14.3 | 14.3 °C |
| 7 Aug 2025, 09:55 | 14.6 | 14.6 °C |
| 22 Jul 2025, 09:56 | 14.9 | 14.9 °C |
| 25 Jun 2025, 09:14 | 14.3 | 14.3 °C |
| 30 May 2025, 09:12 | 13.6 | 13.6 °C |
| 8 Apr 2025, 13:54 | 13.4 | 13.4 °C |
| 19 Mar 2025, 09:05 | 9.7 | 9.7 °C |
| 6 Feb 2025, 12:55 | 9.4 | 9.4 °C |
| 23 Jan 2025, 09:33 | 9.7 | 9.7 °C |
| 5 Dec 2024, 09:02 | 12.1 | 12.1 °C |
| 20 Nov 2024, 11:41 | 9.5 | 9.5 °C |
| 21 Oct 2024, 12:02 | 13.1 | 13.1 °C |
| 18 Sep 2024, 09:53 | 13.7 | 13.7 °C |
| 19 Aug 2024, 14:53 | 15.2 | 15.2 °C |
| 17 Jul 2024, 08:24 | 13.4 | 13.4 °C |
| 25 Jun 2024, 11:23 | 14.1 | 14.1 °C |
pH
code 0061
7.29
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 7.29 | 7.29 |
| 7 Jul 2026, 17:00 | 7.52 | 7.52 |
| 8 Jun 2026, 14:41 | 7.57 | 7.57 |
| 11 May 2026, 09:27 | 7.54 | 7.54 |
| 1 Apr 2026, 14:08 | 7.6 | 7.6 |
| 3 Mar 2026, 09:31 | 7.46 | 7.46 |
| 4 Feb 2026, 10:16 | 7.28 | 7.28 |
| 7 Jan 2026, 12:06 | 7.31 | 7.31 |
| 5 Dec 2025, 09:30 | 7.2 | 7.2 |
| 14 Nov 2025, 14:42 | 6.93 | 6.93 |
| 2 Oct 2025, 09:30 | 7.36 | 7.36 |
| 1 Sep 2025, 08:28 | 7.5 | 7.5 |
| 7 Aug 2025, 09:55 | 7.5 | 7.5 |
| 22 Jul 2025, 09:56 | 7.27 | 7.27 |
| 25 Jun 2025, 09:14 | 7.83 | 7.83 |
| 30 May 2025, 09:12 | 7.85 | 7.85 |
| 8 Apr 2025, 13:54 | 7.44 | 7.44 |
| 19 Mar 2025, 09:05 | 7.46 | 7.46 |
| 6 Feb 2025, 12:55 | 7.36 | 7.36 |
| 23 Jan 2025, 09:33 | 7.44 | 7.44 |
| 5 Dec 2024, 09:02 | 7.1 | 7.1 |
| 20 Nov 2024, 11:41 | 7.55 | 7.55 |
| 21 Oct 2024, 12:02 | 7.34 | 7.34 |
| 18 Sep 2024, 09:53 | 7.42 | 7.42 |
| 19 Aug 2024, 14:53 | 7.4 | 7.4 |
| 17 Jul 2024, 08:24 | 7.35 | 7.35 |
| 25 Jun 2024, 11:23 | 7.8 | 7.8 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.033 mg/l
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 0.033 | 0.033 mg/l |
| 7 Jul 2026, 17:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 14:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 May 2026, 09:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 14:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2026, 09:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2026, 10:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 12:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Nov 2025, 14:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 08:28 | 0.049 | 0.049 mg/l |
| 7 Aug 2025, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2025, 09:56 | 0.18 | 0.18 mg/l |
| 25 Jun 2025, 09:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2025, 09:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 13:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2025, 09:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2025, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jan 2025, 09:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2024, 09:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2024, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2024, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 14:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 08:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2024, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.39 mg/l
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 2.39 | 2.39 mg/l |
| 7 Jul 2026, 17:00 | 3.8 | 3.8 mg/l |
| 8 Jun 2026, 14:41 | 3.09 | 3.09 mg/l |
| 11 May 2026, 09:27 | 4 | 4 mg/l |
| 1 Apr 2026, 14:08 | 4.2 | 4.2 mg/l |
| 3 Mar 2026, 09:31 | 3.9 | 3.9 mg/l |
| 4 Feb 2026, 10:16 | 4.4 | 4.4 mg/l |
| 7 Jan 2026, 12:06 | 3.9 | 3.9 mg/l |
| 5 Dec 2025, 09:30 | 3.5 | 3.5 mg/l |
| 14 Nov 2025, 14:42 | 0.886 | 0.886 mg/l |
| 2 Oct 2025, 09:30 | 3.5 | 3.5 mg/l |
| 1 Sep 2025, 08:28 | 1.5 | 1.5 mg/l |
| 7 Aug 2025, 09:55 | 3.8 | 3.8 mg/l |
| 22 Jul 2025, 09:56 | 3.28 | 3.28 mg/l |
| 25 Jun 2025, 09:14 | 4.1 | 4.1 mg/l |
| 30 May 2025, 09:12 | 4 | 4 mg/l |
| 8 Apr 2025, 13:54 | 4.2 | 4.2 mg/l |
| 19 Mar 2025, 09:05 | 4.4 | 4.4 mg/l |
| 6 Feb 2025, 12:55 | 4.1 | 4.1 mg/l |
| 23 Jan 2025, 09:33 | 4.29 | 4.29 mg/l |
| 5 Dec 2024, 09:02 | 2.9 | 2.9 mg/l |
| 20 Nov 2024, 11:41 | 3.6 | 3.6 mg/l |
| 21 Oct 2024, 12:02 | 3.5 | 3.5 mg/l |
| 18 Sep 2024, 09:53 | 4.1 | 4.1 mg/l |
| 19 Aug 2024, 14:53 | 4.1 | 4.1 mg/l |
| 17 Jul 2024, 08:24 | 4.1 | 4.1 mg/l |
| 25 Jun 2024, 11:23 | 4.4 | 4.4 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.032 mg/l
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 0.032 | 0.032 mg/l |
| 7 Jul 2026, 17:00 | 0.024 | 0.024 mg/l |
| 8 Jun 2026, 14:41 | 0.031 | 0.031 mg/l |
| 11 May 2026, 09:27 | 0.016 | 0.016 mg/l |
| 1 Apr 2026, 14:08 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Mar 2026, 09:31 | 0.027 | 0.027 mg/l |
| 4 Feb 2026, 10:16 | 0.018 | 0.018 mg/l |
| 7 Jan 2026, 12:06 | 0.018 | 0.018 mg/l |
| 5 Dec 2025, 09:30 | 0.019 | 0.019 mg/l |
| 14 Nov 2025, 14:42 | 0.071 | 0.071 mg/l |
| 2 Oct 2025, 09:30 | 0.017 | 0.017 mg/l |
| 1 Sep 2025, 08:28 | 0.036 | 0.036 mg/l |
| 7 Aug 2025, 09:55 | 0.017 | 0.017 mg/l |
| 22 Jul 2025, 09:56 | 0.067 | 0.067 mg/l |
| 25 Jun 2025, 09:14 | 0.026 | 0.026 mg/l |
| 30 May 2025, 09:12 | 0.02 | 0.02 mg/l |
| 8 Apr 2025, 13:54 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Mar 2025, 09:05 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 Feb 2025, 12:55 | 0.01 | 0.01 mg/l |
| 23 Jan 2025, 09:33 | 0.012 | 0.012 mg/l |
| 5 Dec 2024, 09:02 | 0.037 | 0.037 mg/l |
| 20 Nov 2024, 11:41 | 0.017 | 0.017 mg/l |
| 21 Oct 2024, 12:02 | 0.017 | 0.017 mg/l |
| 18 Sep 2024, 09:53 | 0.016 | 0.016 mg/l |
| 19 Aug 2024, 14:53 | 0.016 | 0.016 mg/l |
| 17 Jul 2024, 08:24 | 0.018 | 0.018 mg/l |
| 25 Jun 2024, 11:23 | 0.014 | 0.014 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
220 µS/cm
Sampled 20 Aug 2026, 42 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 14:40 | 220 | 220 µS/cm |
| 7 Jul 2026, 17:00 | 225 | 225 µS/cm |
| 8 Jun 2026, 14:41 | 233 | 233 µS/cm |
| 11 May 2026, 09:27 | 229 | 229 µS/cm |
| 1 Apr 2026, 14:08 | 234 | 234 µS/cm |
| 3 Mar 2026, 09:31 | 275 | 275 µS/cm |
| 4 Feb 2026, 10:16 | 280 | 280 µS/cm |
| 7 Jan 2026, 12:06 | 258 | 258 µS/cm |
| 5 Dec 2025, 09:30 | 273 | 273 µS/cm |
| 14 Nov 2025, 14:42 | 132 | 132 µS/cm |
| 2 Oct 2025, 09:30 | 255 | 255 µS/cm |
| 1 Sep 2025, 08:28 | 171 | 171 µS/cm |
| 7 Aug 2025, 09:55 | 226 | 226 µS/cm |
| 22 Jul 2025, 09:56 | 219 | 219 µS/cm |
| 25 Jun 2025, 09:14 | 231 | 231 µS/cm |
| 30 May 2025, 09:12 | 231 | 231 µS/cm |
| 8 Apr 2025, 13:54 | 233 | 233 µS/cm |
| 19 Mar 2025, 09:05 | 240 | 240 µS/cm |
| 6 Feb 2025, 12:55 | 249 | 249 µS/cm |
| 23 Jan 2025, 09:33 | 259 | 259 µS/cm |
| 5 Dec 2024, 09:02 | 220 | 220 µS/cm |
| 20 Nov 2024, 11:41 | 237 | 237 µS/cm |
| 21 Oct 2024, 12:02 | 235 | 235 µS/cm |
| 18 Sep 2024, 09:53 | 231 | 231 µS/cm |
| 19 Aug 2024, 14:53 | 234 | 234 µS/cm |
| 17 Jul 2024, 08:24 | 232 | 232 µS/cm |
| 25 Jun 2024, 11:23 | 246 | 246 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 | 27 | Jun 2024 – Aug 2026 | 89.7% 20 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Aug 2026 | 8.76 mg/l 20 Aug 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Aug 2026 | 16.4 °C 20 Aug 2026 |
| pH 0061 | River water | 27 | Jun 2024 – Aug 2026 | 7.29 20 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jun 2024 – Aug 2026 | 0.033 mg/l 20 Aug 2026 |
| Nitrate as N 0117 | River water | 27 | Jun 2024 – Aug 2026 | 2.39 mg/l 20 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Jun 2024 – Aug 2026 | 0.032 mg/l 20 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Aug 2026 | 220 µS/cm 20 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jun 2024 – Aug 2026 | 21 mg/l 20 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jun 2024 – Aug 2026 | 0.00019 mg/l 20 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | below 1 mg/l 11 May 2026 |
| Nitrite as N 0118 | River water | 27 | Jun 2024 – Aug 2026 | 0.0055 mg/l 20 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Jun 2024 – Aug 2026 | 2.4 mg/l 20 Aug 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.