Gwindra Stream at Treway Bridge
EA name: GWINDRA STREAM AT TREWAY BRIDGE (also listed as “GWINDRA STREAM AT TREWAY BRIDGE BELOW ST STEPHENS COOMBE STW”)
Environment Agency sampling point SW-81930903 · 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
- 21 Aug 2026, 12:0941 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 42 since 5 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 193800, 50650As published, to the nearest 10 m. Open in a map
- River, by its own name
- Gwindra Stream
- River, by the map
- Not placedTwo watercourses within reach (8 m and 42 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (35 samples)
Planned investigation (national agency policy) (4 samples)
Planned investigation (local monitoring) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.5%
Sampled 21 Aug 2026, 41 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 12:09 | 98.5 | 98.5% |
| 25 Jun 2026, 11:49 | 95 | 95% |
| 14 May 2026, 11:46 | 99 | 99% |
| 9 Apr 2026, 11:30 | 102.2 | 102.2% |
| 19 Mar 2026, 10:24 | 98.7 | 98.7% |
| 5 Feb 2026, 10:48 | 95.1 | 95.1% |
| 8 Jan 2026, 10:36 | 99 | 99% |
| 12 Dec 2025, 11:09 | 99.1 | 99.1% |
| 6 Nov 2025, 10:50 | 96.3 | 96.3% |
| 9 Oct 2025, 11:16 | 94.8 | 94.8% |
| 16 Sep 2025, 11:01 | 93.4 | 93.4% |
| 8 Jul 2025, 10:57 | 98 | 98% |
| 20 Jun 2025, 10:47 | 100.2 | 100.2% |
| 7 May 2025, 10:36 | 99.7 | 99.7% |
| 7 Apr 2025, 11:39 | 101.1 | 101.1% |
| 3 Mar 2025, 10:55 | 99.5 | 99.5% |
| 13 Feb 2025, 10:16 | 99.2 | 99.2% |
| 9 Jan 2025, 11:25 | 96.8 | 96.8% |
| 10 Dec 2024, 10:54 | 96.3 | 96.3% |
| 6 Nov 2024, 10:35 | 96.4 | 96.4% |
| 10 Oct 2024, 10:41 | 97.4 | 97.4% |
| 12 Sep 2024, 10:46 | 97.6 | 97.6% |
| 8 Aug 2024, 10:35 | 94.5 | 94.5% |
| 9 Jul 2024, 11:30 | 96.1 | 96.1% |
| 12 Jun 2024, 11:23 | 96 | 96% |
| 9 May 2024, 10:36 | 99.6 | 99.6% |
| 11 Apr 2024, 10:49 | 97.5 | 97.5% |
| 1 Mar 2024, 09:42 | 99.5 | 99.5% |
| 1 Feb 2024, 11:32 | 98.9 | 98.9% |
| 3 Jan 2024, 09:07 | 98 | 98% |
| 7 Dec 2023, 10:39 | 95.2 | 95.2% |
| 8 Nov 2023, 10:39 | 95.3 | 95.3% |
| 27 Oct 2023, 10:36 | 99.3 | 99.3% |
| 5 Oct 2023, 11:15 | 93.9 | 93.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 1 Mar 2024, 2.6 years ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Mar 2024, 09:42 | 11.7 | 11.7 mg/l |
| 1 Feb 2024, 11:32 | 11.2 | 11.2 mg/l |
| 3 Jan 2024, 09:07 | 10.9 | 10.9 mg/l |
| 7 Dec 2023, 10:39 | 10.6 | 10.6 mg/l |
| 8 Nov 2023, 10:39 | 10.3 | 10.3 mg/l |
| 27 Oct 2023, 10:36 | 10.7 | 10.7 mg/l |
| 5 Oct 2023, 11:15 | 9.7 | 9.7 mg/l |
Water temperature
code 0076 · °C
15.6 °C
Sampled 21 Aug 2026, 41 days ago · 41 results banked
Every result (41)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 12:09 | 15.6 | 15.6 °C |
| 10 Jul 2026, 10:52 | 17.6 | 17.6 °C |
| 25 Jun 2026, 11:49 | 19.2 | 19.2 °C |
| 14 May 2026, 11:46 | 11.5 | 11.5 °C |
| 9 Apr 2026, 11:30 | 11.9 | 11.9 °C |
| 19 Mar 2026, 10:24 | 10.3 | 10.3 °C |
| 5 Feb 2026, 10:48 | 10.1 | 10.1 °C |
| 8 Jan 2026, 10:36 | 8.6 | 8.6 °C |
| 12 Dec 2025, 11:09 | 10.8 | 10.8 °C |
| 6 Nov 2025, 10:50 | 13.1 | 13.1 °C |
| 9 Oct 2025, 11:16 | 12.3 | 12.3 °C |
| 16 Sep 2025, 11:01 | 13.7 | 13.7 °C |
| 8 Jul 2025, 10:57 | 14.8 | 14.8 °C |
| 20 Jun 2025, 10:47 | 16.3 | 16.3 °C |
| 7 May 2025, 10:36 | 11.2 | 11.2 °C |
| 7 Apr 2025, 11:39 | 10.4 | 10.4 °C |
| 3 Mar 2025, 10:55 | 8.5 | 8.5 °C |
| 13 Feb 2025, 10:16 | 7.7 | 7.7 °C |
| 9 Jan 2025, 11:25 | 7.8 | 7.8 °C |
| 10 Dec 2024, 10:54 | 9.4 | 9.4 °C |
| 6 Nov 2024, 10:35 | 13.1 | 13.1 °C |
| 10 Oct 2024, 10:41 | 12.5 | 12.5 °C |
| 12 Sep 2024, 10:46 | 12.3 | 12.3 °C |
| 8 Aug 2024, 10:35 | 15.5 | 15.5 °C |
| 9 Jul 2024, 11:30 | 14.5 | 14.5 °C |
| 12 Jun 2024, 11:23 | 12.4 | 12.4 °C |
| 9 May 2024, 10:36 | 12.4 | 12.4 °C |
| 11 Apr 2024, 10:49 | 11.4 | 11.4 °C |
| 12 Mar 2024, 11:02 | 10.6 | 10.6 °C |
| 1 Mar 2024, 09:42 | 8.3 | 8.3 °C |
| 6 Feb 2024, 10:42 | 10.8 | 10.8 °C |
| 1 Feb 2024, 11:32 | 9.6 | 9.6 °C |
| 3 Jan 2024, 11:20 | 10.7 | 10.7 °C |
| 3 Jan 2024, 09:07 | 10.5 | 10.5 °C |
| 18 Dec 2023, 11:49 | 11.4 | 11.4 °C |
| 7 Dec 2023, 10:39 | 10.5 | 10.5 °C |
| 24 Nov 2023, 12:53 | 11.5 | 11.5 °C |
| 8 Nov 2023, 10:39 | 11.7 | 11.7 °C |
| 27 Oct 2023, 10:36 | 11.8 | 11.8 °C |
| 20 Oct 2023, 10:33 | 13 | 13 °C |
| 5 Oct 2023, 11:15 | 13.8 | 13.8 °C |
pH
code 0061
7.5
Sampled 21 Aug 2026, 41 days ago · 41 results banked
Every result (41)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 12:09 | 7.5 | 7.5 |
| 10 Jul 2026, 10:52 | 7.3 | 7.3 |
| 25 Jun 2026, 11:49 | 7.5 | 7.5 |
| 14 May 2026, 11:46 | 7.1 | 7.1 |
| 9 Apr 2026, 11:30 | 7.19 | 7.19 |
| 19 Mar 2026, 10:24 | 6.99 | 6.99 |
| 5 Feb 2026, 10:48 | 6.78 | 6.78 |
| 8 Jan 2026, 10:36 | 6.9 | 6.9 |
| 12 Dec 2025, 11:09 | 6.76 | 6.76 |
| 6 Nov 2025, 10:50 | 6.86 | 6.86 |
| 9 Oct 2025, 11:16 | 6.98 | 6.98 |
| 16 Sep 2025, 11:01 | 7.08 | 7.08 |
| 8 Jul 2025, 10:57 | 7.3 | 7.3 |
| 20 Jun 2025, 10:47 | 6.9 | 6.9 |
| 7 May 2025, 10:36 | 6.89 | 6.89 |
| 7 Apr 2025, 11:39 | 7.31 | 7.31 |
| 3 Mar 2025, 10:55 | 6.8 | 6.8 |
| 13 Feb 2025, 10:16 | 6.98 | 6.98 |
| 9 Jan 2025, 11:25 | 6.88 | 6.88 |
| 10 Dec 2024, 10:54 | 6.91 | 6.91 |
| 6 Nov 2024, 10:35 | 6.95 | 6.95 |
| 10 Oct 2024, 10:41 | 7 | 7 |
| 12 Sep 2024, 10:46 | 7.14 | 7.14 |
| 8 Aug 2024, 10:35 | 7.18 | 7.18 |
| 9 Jul 2024, 11:30 | 7.31 | 7.31 |
| 12 Jun 2024, 11:23 | 7.24 | 7.24 |
| 9 May 2024, 10:36 | 7.17 | 7.17 |
| 11 Apr 2024, 10:49 | 6.9 | 6.9 |
| 12 Mar 2024, 11:02 | 7.03 | 7.03 |
| 1 Mar 2024, 09:42 | 6.95 | 6.95 |
| 6 Feb 2024, 10:42 | 6.85 | 6.85 |
| 1 Feb 2024, 11:32 | 7.02 | 7.02 |
| 3 Jan 2024, 11:20 | 6.7 | 6.7 |
| 3 Jan 2024, 09:07 | 6.9 | 6.9 |
| 18 Dec 2023, 11:49 | 6.83 | 6.83 |
| 7 Dec 2023, 10:39 | 6.58 | 6.58 |
| 24 Nov 2023, 12:53 | 6.93 | 6.93 |
| 8 Nov 2023, 10:39 | 6.78 | 6.78 |
| 27 Oct 2023, 10:36 | 7.34 | 7.34 |
| 20 Oct 2023, 10:33 | 7.34 | 7.34 |
| 5 Oct 2023, 11:15 | 6.98 | 6.98 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.077 mg/l
Sampled 12 Mar 2024, 2.6 years ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Mar 2024, 11:02 | 0.077 | 0.077 mg/l |
| 1 Mar 2024, 09:42 | 0.11 | 0.11 mg/l |
| 6 Feb 2024, 10:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jan 2024, 11:20 | 0.19 | 0.19 mg/l |
| 3 Jan 2024, 09:07 | 0.16 | 0.16 mg/l |
| 18 Dec 2023, 11:49 | 0.067 | 0.067 mg/l |
| 7 Dec 2023, 10:39 | 0.53 | 0.53 mg/l |
| 24 Nov 2023, 12:53 | 0.058 | 0.058 mg/l |
| 8 Nov 2023, 10:39 | 0.44 | 0.44 mg/l |
| 27 Oct 2023, 10:36 | 0.081 | 0.081 mg/l |
| 20 Oct 2023, 10:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Oct 2023, 11:15 | 0.032 | 0.032 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.58 mg/l
Sampled 1 Mar 2024, 2.6 years ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Mar 2024, 09:42 | 3.58 | 3.58 mg/l |
| 1 Feb 2024, 11:32 | 4.08 | 4.08 mg/l |
| 3 Jan 2024, 09:07 | 3.97 | 3.97 mg/l |
| 7 Dec 2023, 10:39 | 3.27 | 3.27 mg/l |
| 8 Nov 2023, 10:39 | 3.15 | 3.15 mg/l |
| 27 Oct 2023, 10:36 | 3.77 | 3.77 mg/l |
| 5 Oct 2023, 11:15 | 4.38 | 4.38 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.028 mg/l
Sampled 1 Mar 2024, 2.6 years ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Mar 2024, 09:42 | 0.028 | 0.028 mg/l |
| 1 Feb 2024, 11:32 | 0.12 | 0.12 mg/l |
| 3 Jan 2024, 09:07 | 0.045 | 0.045 mg/l |
| 7 Dec 2023, 10:39 | 0.05 | 0.05 mg/l |
| 8 Nov 2023, 10:39 | 0.035 | 0.035 mg/l |
| 27 Oct 2023, 10:36 | 0.15 | 0.15 mg/l |
| 5 Oct 2023, 11:15 | 0.36 | 0.36 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
292 µS/cm
Sampled 21 Aug 2026, 41 days ago · 41 results banked
Every result (41)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 12:09 | 292 | 292 µS/cm |
| 10 Jul 2026, 10:52 | 289 | 289 µS/cm |
| 25 Jun 2026, 11:49 | 271 | 271 µS/cm |
| 14 May 2026, 11:46 | 259 | 259 µS/cm |
| 9 Apr 2026, 11:30 | 246 | 246 µS/cm |
| 19 Mar 2026, 10:24 | 217 | 217 µS/cm |
| 5 Feb 2026, 10:48 | 206 | 206 µS/cm |
| 8 Jan 2026, 10:36 | 239 | 239 µS/cm |
| 12 Dec 2025, 11:09 | 213 | 213 µS/cm |
| 6 Nov 2025, 10:50 | 219 | 219 µS/cm |
| 9 Oct 2025, 11:16 | 262 | 262 µS/cm |
| 16 Sep 2025, 11:01 | 238 | 238 µS/cm |
| 8 Jul 2025, 10:57 | 279 | 279 µS/cm |
| 20 Jun 2025, 10:47 | 253 | 253 µS/cm |
| 7 May 2025, 10:36 | 253 | 253 µS/cm |
| 7 Apr 2025, 11:39 | 256 | 256 µS/cm |
| 3 Mar 2025, 10:55 | 214 | 214 µS/cm |
| 13 Feb 2025, 10:16 | 241 | 241 µS/cm |
| 9 Jan 2025, 11:25 | 223 | 223 µS/cm |
| 10 Dec 2024, 10:54 | 218 | 218 µS/cm |
| 6 Nov 2024, 10:35 | 224 | 224 µS/cm |
| 10 Oct 2024, 10:41 | 224 | 224 µS/cm |
| 12 Sep 2024, 10:46 | 236 | 236 µS/cm |
| 8 Aug 2024, 10:35 | 280 | 280 µS/cm |
| 9 Jul 2024, 11:30 | 250 | 250 µS/cm |
| 12 Jun 2024, 11:23 | 257 | 257 µS/cm |
| 9 May 2024, 10:36 | 234 | 234 µS/cm |
| 11 Apr 2024, 10:49 | 212 | 212 µS/cm |
| 12 Mar 2024, 11:02 | 224 | 224 µS/cm |
| 1 Mar 2024, 09:42 | 223 | 223 µS/cm |
| 6 Feb 2024, 10:42 | 243 | 243 µS/cm |
| 1 Feb 2024, 11:32 | 231 | 231 µS/cm |
| 3 Jan 2024, 11:20 | 216 | 216 µS/cm |
| 3 Jan 2024, 09:07 | 220 | 220 µS/cm |
| 18 Dec 2023, 11:49 | 225 | 225 µS/cm |
| 7 Dec 2023, 10:39 | 218 | 218 µS/cm |
| 24 Nov 2023, 12:53 | 228 | 228 µS/cm |
| 8 Nov 2023, 10:39 | 216 | 216 µS/cm |
| 27 Oct 2023, 10:36 | 227 | 227 µS/cm |
| 20 Oct 2023, 10:33 | 236 | 236 µS/cm |
| 5 Oct 2023, 11:15 | 272 | 272 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
15000 per 100 ml
Sampled 7 Dec 2023, 2.8 years ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Dec 2023, 10:39 | 15000 | 15000 per 100 ml |
| 8 Nov 2023, 10:39 | 7600 | 7600 per 100 ml |
| 27 Oct 2023, 10:36 | 3700 | 3700 per 100 ml |
| 5 Oct 2023, 11:15 | 4600 | 4600 per 100 ml |
Everything measured here
65 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 65 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 34 | Oct 2023 – Aug 2026 | 98.5% 21 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 7 | Oct 2023 – Mar 2024 | 11.7 mg/l 1 Mar 2024 |
| Temperature of Water 0076 | River water | 41 | Oct 2023 – Aug 2026 | 15.6 °C 21 Aug 2026 |
| pH 0061 | River water | 41 | Oct 2023 – Aug 2026 | 7.5 21 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Oct 2023 – Mar 2024 | 0.077 mg/l 12 Mar 2024 |
| Nitrate as N 0117 | River water | 7 | Oct 2023 – Mar 2024 | 3.58 mg/l 1 Mar 2024 |
| Orthophosphate, reactive as P 0180 | River water | 7 | Oct 2023 – Mar 2024 | 0.028 mg/l 1 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 41 | Oct 2023 – Aug 2026 | 292 µS/cm 21 Aug 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 4 | Oct 2023 – Dec 2023 | 15000 per 100 ml 7 Dec 2023 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 13 | Oct 2023 – Mar 2024 | 23 mg/l 12 Mar 2024 |
| Aluminium 6057 | River water | 31 | Oct 2023 – Apr 2026 | 220 µg/l 9 Apr 2026 |
| Aluminium, Dissolved 6037 | River water | 31 | Oct 2023 – Apr 2026 | 72 µg/l 9 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Oct 2023 – Mar 2024 | 0.00016 mg/l 1 Mar 2024 |
| Arsenic 6046 | River water | 31 | Oct 2023 – Apr 2026 | 2 µg/l 9 Apr 2026 |
| Arsenic, Dissolved 6045 | River water | 31 | Oct 2023 – Apr 2026 | 1.3 µg/l 9 Apr 2026 |
| Barium 6062 | River water | 31 | Oct 2023 – Apr 2026 | below 10 µg/l 9 Apr 2026 |
| Barium, Dissolved 9446 | River water | 35 | Oct 2023 – Aug 2026 | below 10 µg/l 21 Aug 2026 |
| Boron 6059 | River water | 31 | Oct 2023 – Apr 2026 | below 100 µg/l 9 Apr 2026 |
| Boron, Dissolved 9447 | River water | 35 | Oct 2023 – Aug 2026 | below 100 µg/l 21 Aug 2026 |
| Cadmium 0108 | River water | 35 | Oct 2023 – Aug 2026 | below 0.1 µg/l 21 Aug 2026 |
| Cadmium, Dissolved 0106 | River water | 35 | Oct 2023 – Aug 2026 | below 0.1 µg/l 21 Aug 2026 |
| Calcium 0241 | River water | 31 | Oct 2023 – Apr 2026 | 16 mg/l 9 Apr 2026 |
| Calcium, Dissolved 0239 | River water | 35 | Oct 2023 – Aug 2026 | 20 mg/l 21 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 34 | Oct 2023 – Aug 2026 | 2.8 mg/l 21 Aug 2026 |
| Chloride 0172 | River water | 6 | Oct 2023 – Mar 2024 | 24 mg/l 12 Mar 2024 |
| Chromium 3164 | River water | 31 | Oct 2023 – Apr 2026 | below 0.5 µg/l 9 Apr 2026 |
| Chromium, Dissolved 3409 | River water | 31 | Oct 2023 – Apr 2026 | below 0.5 µg/l 9 Apr 2026 |
| Copper 6452 | River water | 35 | Oct 2023 – Aug 2026 | 3.1 µg/l 21 Aug 2026 |
| Copper : BLM Bioavailable 4821 | River water | 6 | Oct 2023 – Mar 2024 | 0.45 µg/l 12 Mar 2024 |
| Copper, Dissolved 6450 | River water | 35 | Oct 2023 – Aug 2026 | 2.6 µg/l 21 Aug 2026 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 4 | Oct 2023 – Dec 2023 | 8200 colony forming units / 100ml 7 Dec 2023 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 4 | Oct 2023 – Dec 2023 | 9100 colony forming units / 100ml 7 Dec 2023 |
| Hardness, Total as CaCO3 0158 | River water | 35 | Oct 2023 – Aug 2026 | 73.4 mg/l 21 Aug 2026 |
| Ionic Balance 7044 | River water | 6 | Oct 2023 – Mar 2024 | 0.00296% 12 Mar 2024 |
| Iron 6051 | River water | 31 | Oct 2023 – Apr 2026 | 180 µg/l 9 Apr 2026 |
| Iron, Dissolved 6460 | River water | 35 | Oct 2023 – Aug 2026 | 38 µg/l 21 Aug 2026 |
| Lead 0050 | River water | 10 | Oct 2023 – Aug 2026 | below 2 µg/l 21 Aug 2026 |
| Lead : BLM Bioavailable 3377 | River water | 6 | Oct 2023 – Mar 2024 | 0.05 µg/l 12 Mar 2024 |
| Lead, Dissolved 0052 | River water | 35 | Oct 2023 – Aug 2026 | below 2 µg/l 21 Aug 2026 |
| Lithium 6064 | River water | 31 | Oct 2023 – Apr 2026 | below 100 µg/l 9 Apr 2026 |
| Lithium, Dissolved 4201 | River water | 35 | Oct 2023 – Aug 2026 | below 100 µg/l 21 Aug 2026 |
| Magnesium 0237 | River water | 31 | Oct 2023 – Apr 2026 | 5.2 mg/l 9 Apr 2026 |
| Magnesium, Dissolved 0235 | River water | 35 | Oct 2023 – Aug 2026 | 5.7 mg/l 21 Aug 2026 |
| Manganese 6050 | River water | 31 | Oct 2023 – Apr 2026 | 67 µg/l 9 Apr 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 6 | Oct 2023 – Mar 2024 | 11 µg/l 12 Mar 2024 |
| Manganese, Dissolved 6458 | River water | 35 | Oct 2023 – Aug 2026 | below 10 µg/l 21 Aug 2026 |
| Nickel 6462 | River water | 10 | Oct 2023 – Aug 2026 | 2.9 µg/l 21 Aug 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 6 | Oct 2023 – Mar 2024 | 1.5 µg/l 12 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 35 | Oct 2023 – Aug 2026 | 2.7 µg/l 21 Aug 2026 |
| Nitrite as N 0118 | River water | 13 | Oct 2023 – Mar 2024 | 0.042 mg/l 12 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 13 | Oct 2023 – Mar 2024 | 3.7 mg/l 12 Mar 2024 |
| pH : In Situ 3169 | River water | 4 | May 2026 – Aug 2026 | 7.42 21 Aug 2026 |
| Potassium 0211 | River water | 31 | Oct 2023 – Apr 2026 | 4.4 mg/l 9 Apr 2026 |
| Potassium, Dissolved 0209 | River water | 35 | Oct 2023 – Aug 2026 | 5.3 mg/l 21 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 6 | Oct 2023 – Mar 2024 | 7.7 mg/l 12 Mar 2024 |
| Sodium 0207 | River water | 31 | Oct 2023 – Apr 2026 | 19 mg/l 9 Apr 2026 |
| Sodium, Dissolved 0205 | River water | 35 | Oct 2023 – Aug 2026 | 22 mg/l 21 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 35 | Oct 2023 – Aug 2026 | 4.3 mg/l 21 Aug 2026 |
| Strontium 6063 | River water | 31 | Oct 2023 – Apr 2026 | 57 µg/l 9 Apr 2026 |
| Strontium, Filtered 6693 | River water | 35 | Oct 2023 – Aug 2026 | 61 µg/l 21 Aug 2026 |
| Sulphate as SO4 0183 | River water | 31 | Oct 2023 – Apr 2026 | 34 mg/l 9 Apr 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 35 | Oct 2023 – Aug 2026 | 38 mg/l 21 Aug 2026 |
| Zinc 6455 | River water | 35 | Oct 2023 – Aug 2026 | 28 µg/l 21 Aug 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 6 | Oct 2023 – Mar 2024 | 29 µg/l 12 Mar 2024 |
| Zinc, Dissolved 3408 | River water | 35 | Oct 2023 – Aug 2026 | 24 µg/l 21 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.