Calder at North Dene B6112 Road Bridge
EA name: CALDER AT NORTH DENE B6112 ROAD BRIDGE
Environment Agency sampling point NE-49500621 · 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
- 15 Jun 2026, 12:394 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 30 since 10 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 409693, 421969As published, to the nearest 1 m. Open in a map
- River, by its own name
- Calder
- River, by the map
- River CalderPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Elland On the River Calder · 4.4 km along the river
- Nearest gauge upstream
- Copley Bridge On the River Calder · 1.5 km along the riverHalifax On the Hebble Brook · 7.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Planned investigation (local monitoring) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.8%
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 99.8 | 99.8% |
| 12 May 2026, 11:24 | 91.7 | 91.7% |
| 22 Apr 2026, 14:02 | 115.3 | 115.3% |
| 16 Mar 2026, 14:57 | 101 | 101% |
| 24 Feb 2026, 14:36 | 100 | 100% |
| 29 Jan 2026, 12:18 | 98.6 | 98.6% |
| 9 Dec 2025, 11:00 | 100.4 | 100.4% |
| 6 Nov 2025, 13:17 | 101.6 | 101.6% |
| 14 Oct 2025, 11:18 | 99.8 | 99.8% |
| 25 Sep 2025, 09:33 | 99.3 | 99.3% |
| 6 Aug 2025, 09:50 | 96.9 | 96.9% |
| 1 Jul 2025, 13:43 | 94.8 | 94.8% |
| 2 Jun 2025, 11:32 | 92.9 | 92.9% |
| 28 May 2025, 12:44 | 93.1 | 93.1% |
| 13 May 2025, 13:12 | 97.4 | 97.4% |
| 25 Apr 2025, 11:18 | 102.3 | 102.3% |
| 9 Apr 2025, 09:58 | 99.5 | 99.5% |
| 19 Mar 2025, 10:27 | 109.4 | 109.4% |
| 11 Dec 2024, 12:38 | 100.2 | 100.2% |
| 26 Nov 2024, 13:19 | 100.7 | 100.7% |
| 22 Oct 2024, 11:58 | 96.7 | 96.7% |
| 19 Sep 2024, 10:40 | 94 | 94% |
| 22 Aug 2024, 07:24 | 91 | 91% |
| 17 Jul 2024, 07:19 | 95.7 | 95.7% |
| 8 Mar 2024, 11:01 | 98.7 | 98.7% |
| 8 Feb 2024, 10:10 | 97.7 | 97.7% |
| 10 Jan 2024, 12:11 | 97.3 | 97.3% |
| 15 Dec 2023, 10:44 | 96.4 | 96.4% |
| 13 Nov 2023, 10:10 | 98 | 98% |
| 10 Oct 2023, 13:26 | 96.7 | 96.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.2 mg/l
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 10.2 | 10.2 mg/l |
| 12 May 2026, 11:24 | 10.3 | 10.3 mg/l |
| 22 Apr 2026, 14:02 | 12.8 | 12.8 mg/l |
| 16 Mar 2026, 14:57 | 12.1 | 12.1 mg/l |
| 24 Feb 2026, 14:36 | 11.6 | 11.6 mg/l |
| 29 Jan 2026, 12:18 | 12.2 | 12.2 mg/l |
| 9 Dec 2025, 11:00 | 11.6 | 11.6 mg/l |
| 6 Nov 2025, 13:17 | 10.4 | 10.4 mg/l |
| 14 Oct 2025, 11:18 | 10.7 | 10.7 mg/l |
| 25 Sep 2025, 09:33 | 11.1 | 11.1 mg/l |
| 6 Aug 2025, 09:50 | 9.75 | 9.75 mg/l |
| 1 Jul 2025, 13:43 | 8.77 | 8.77 mg/l |
| 2 Jun 2025, 11:32 | 9.45 | 9.45 mg/l |
| 28 May 2025, 12:44 | 9.7 | 9.7 mg/l |
| 13 May 2025, 13:12 | 9.61 | 9.61 mg/l |
| 25 Apr 2025, 11:18 | 11.2 | 11.2 mg/l |
| 9 Apr 2025, 09:58 | 11.6 | 11.6 mg/l |
| 19 Mar 2025, 10:27 | 13.5 | 13.5 mg/l |
| 11 Dec 2024, 12:38 | 12.1 | 12.1 mg/l |
| 26 Nov 2024, 13:19 | 11.9 | 11.9 mg/l |
| 22 Oct 2024, 11:58 | 10.7 | 10.7 mg/l |
| 19 Sep 2024, 10:40 | 9.86 | 9.86 mg/l |
| 22 Aug 2024, 07:24 | 9.15 | 9.15 mg/l |
| 17 Jul 2024, 07:19 | 9.77 | 9.77 mg/l |
| 8 Mar 2024, 11:01 | 12.1 | 12.1 mg/l |
| 8 Feb 2024, 10:10 | 12.3 | 12.3 mg/l |
| 10 Jan 2024, 12:11 | 12.2 | 12.2 mg/l |
| 15 Dec 2023, 10:44 | 11.7 | 11.7 mg/l |
| 13 Nov 2023, 10:10 | 11.3 | 11.3 mg/l |
| 10 Oct 2023, 13:26 | 9.94 | 9.94 mg/l |
Water temperature
code 0076 · °C
14.1 °C
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 14.1 | 14.1 °C |
| 12 May 2026, 11:24 | 10.3 | 10.3 °C |
| 22 Apr 2026, 14:02 | 10.7 | 10.7 °C |
| 16 Mar 2026, 14:57 | 7.6 | 7.6 °C |
| 24 Feb 2026, 14:36 | 8.7 | 8.7 °C |
| 29 Jan 2026, 12:18 | 6.2 | 6.2 °C |
| 9 Dec 2025, 11:00 | 9.1 | 9.1 °C |
| 6 Nov 2025, 13:17 | 14.2 | 14.2 °C |
| 14 Oct 2025, 11:18 | 12.1 | 12.1 °C |
| 25 Sep 2025, 09:33 | 10.4 | 10.4 °C |
| 6 Aug 2025, 09:50 | 15 | 15 °C |
| 1 Jul 2025, 13:43 | 19 | 19 °C |
| 2 Jun 2025, 11:32 | 14.5 | 14.5 °C |
| 28 May 2025, 12:44 | 13.4 | 13.4 °C |
| 13 May 2025, 13:12 | 15.9 | 15.9 °C |
| 25 Apr 2025, 11:18 | 11.3 | 11.3 °C |
| 9 Apr 2025, 09:58 | 8.7 | 8.7 °C |
| 19 Mar 2025, 10:27 | 6.4 | 6.4 °C |
| 11 Dec 2024, 12:38 | 7.1 | 7.1 °C |
| 26 Nov 2024, 13:19 | 7.9 | 7.9 °C |
| 22 Oct 2024, 11:58 | 10.9 | 10.9 °C |
| 19 Sep 2024, 10:40 | 13.1 | 13.1 °C |
| 22 Aug 2024, 07:24 | 15 | 15 °C |
| 17 Jul 2024, 07:19 | 14.3 | 14.3 °C |
| 8 Mar 2024, 11:01 | 6.7 | 6.7 °C |
| 8 Feb 2024, 10:10 | 5.6 | 5.6 °C |
| 10 Jan 2024, 12:11 | 5.8 | 5.8 °C |
| 15 Dec 2023, 10:44 | 6.9 | 6.9 °C |
| 13 Nov 2023, 10:10 | 8.9 | 8.9 °C |
| 10 Oct 2023, 13:26 | 14 | 14 °C |
pH
code 0061
7.83
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 7.83 | 7.83 |
| 12 May 2026, 11:24 | 7.53 | 7.53 |
| 22 Apr 2026, 14:02 | 7.93 | 7.93 |
| 16 Mar 2026, 14:57 | 7.19 | 7.19 |
| 24 Feb 2026, 14:36 | 7.02 | 7.02 |
| 29 Jan 2026, 12:18 | 7.54 | 7.54 |
| 9 Dec 2025, 11:00 | 7.99 | 7.99 |
| 6 Nov 2025, 13:17 | 7.99 | 7.99 |
| 14 Oct 2025, 11:18 | 6.78 | 6.78 |
| 25 Sep 2025, 09:33 | 7.63 | 7.63 |
| 6 Aug 2025, 09:50 | 7.81 | 7.81 |
| 1 Jul 2025, 13:43 | 7.29 | 7.29 |
| 2 Jun 2025, 11:32 | 7.4 | 7.4 |
| 28 May 2025, 12:44 | 7.31 | 7.31 |
| 13 May 2025, 13:12 | 7.33 | 7.33 |
| 25 Apr 2025, 11:18 | 7.58 | 7.58 |
| 9 Apr 2025, 09:58 | 7.69 | 7.69 |
| 19 Mar 2025, 10:27 | 7.61 | 7.61 |
| 11 Dec 2024, 12:38 | 7.26 | 7.26 |
| 26 Nov 2024, 13:19 | 7.92 | 7.92 |
| 22 Oct 2024, 11:58 | 7.61 | 7.61 |
| 19 Sep 2024, 10:40 | 7.35 | 7.35 |
| 22 Aug 2024, 07:24 | 7.58 | 7.58 |
| 17 Jul 2024, 07:19 | 7.48 | 7.48 |
| 8 Mar 2024, 11:01 | 7.33 | 7.33 |
| 8 Feb 2024, 10:10 | 7.36 | 7.36 |
| 10 Jan 2024, 12:11 | 7.48 | 7.48 |
| 15 Dec 2023, 10:44 | 7.33 | 7.33 |
| 13 Nov 2023, 10:10 | 7.47 | 7.47 |
| 10 Oct 2023, 13:26 | 7.4 | 7.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.063 mg/l
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 0.063 | 0.063 mg/l |
| 12 May 2026, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2026, 14:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 14:57 | 0.27 | 0.27 mg/l |
| 24 Feb 2026, 14:36 | 0.26 | 0.26 mg/l |
| 29 Jan 2026, 12:18 | 0.24 | 0.24 mg/l |
| 9 Dec 2025, 11:00 | 0.064 | 0.064 mg/l |
| 6 Nov 2025, 13:17 | 0.055 | 0.055 mg/l |
| 14 Oct 2025, 11:18 | 0.22 | 0.22 mg/l |
| 25 Sep 2025, 09:33 | 0.12 | 0.12 mg/l |
| 6 Aug 2025, 09:50 | 0.14 | 0.14 mg/l |
| 1 Jul 2025, 13:43 | 0.24 | 0.24 mg/l |
| 2 Jun 2025, 11:32 | 0.33 | 0.33 mg/l |
| 28 May 2025, 12:44 | 0.29 | 0.29 mg/l |
| 13 May 2025, 13:12 | 0.33 | 0.33 mg/l |
| 25 Apr 2025, 11:18 | 0.38 | 0.38 mg/l |
| 9 Apr 2025, 09:58 | 0.37 | 0.37 mg/l |
| 19 Mar 2025, 10:27 | 0.79 | 0.79 mg/l |
| 11 Dec 2024, 12:38 | 0.24 | 0.24 mg/l |
| 26 Nov 2024, 13:19 | 0.15 | 0.15 mg/l |
| 22 Oct 2024, 11:58 | 0.38 | 0.38 mg/l |
| 19 Sep 2024, 10:40 | 0.22 | 0.22 mg/l |
| 22 Aug 2024, 07:24 | 0.091 | 0.091 mg/l |
| 17 Jul 2024, 07:19 | 0.12 | 0.12 mg/l |
| 8 Mar 2024, 11:01 | 0.35 | 0.35 mg/l |
| 8 Feb 2024, 10:10 | 0.4 | 0.4 mg/l |
| 10 Jan 2024, 12:11 | 0.42 | 0.42 mg/l |
| 15 Dec 2023, 10:44 | 0.19 | 0.19 mg/l |
| 13 Nov 2023, 10:10 | 0.34 | 0.34 mg/l |
| 10 Oct 2023, 13:26 | 0.14 | 0.14 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.88 mg/l
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 2.88 | 2.88 mg/l |
| 12 May 2026, 11:24 | 3.78 | 3.78 mg/l |
| 22 Apr 2026, 14:02 | 2.58 | 2.58 mg/l |
| 16 Mar 2026, 14:57 | 1.78 | 1.78 mg/l |
| 24 Feb 2026, 14:36 | 1.78 | 1.78 mg/l |
| 29 Jan 2026, 12:18 | 2.18 | 2.18 mg/l |
| 9 Dec 2025, 11:00 | 0.846 | 0.846 mg/l |
| 6 Nov 2025, 13:17 | 1.49 | 1.49 mg/l |
| 14 Oct 2025, 11:18 | 3.46 | 3.46 mg/l |
| 25 Sep 2025, 09:33 | 2.68 | 2.68 mg/l |
| 6 Aug 2025, 09:50 | 3.76 | 3.76 mg/l |
| 1 Jul 2025, 13:43 | 5.33 | 5.33 mg/l |
| 2 Jun 2025, 11:32 | 4.72 | 4.72 mg/l |
| 28 May 2025, 12:44 | 2.95 | 2.95 mg/l |
| 13 May 2025, 13:12 | 6.77 | 6.77 mg/l |
| 25 Apr 2025, 11:18 | 5.63 | 5.63 mg/l |
| 9 Apr 2025, 09:58 | 4.74 | 4.74 mg/l |
| 19 Mar 2025, 10:27 | 4.43 | 4.43 mg/l |
| 11 Dec 2024, 12:38 | 2.17 | 2.17 mg/l |
| 26 Nov 2024, 13:19 | 1.59 | 1.59 mg/l |
| 22 Oct 2024, 11:58 | 2.26 | 2.26 mg/l |
| 19 Sep 2024, 10:40 | 4.92 | 4.92 mg/l |
| 22 Aug 2024, 07:24 | 4.27 | 4.27 mg/l |
| 17 Jul 2024, 07:19 | 3.24 | 3.24 mg/l |
| 8 Mar 2024, 11:01 | 2.37 | 2.37 mg/l |
| 8 Feb 2024, 10:10 | 2.16 | 2.16 mg/l |
| 10 Jan 2024, 12:11 | 2.63 | 2.63 mg/l |
| 15 Dec 2023, 10:44 | 1.78 | 1.78 mg/l |
| 13 Nov 2023, 10:10 | 1.38 | 1.38 mg/l |
| 10 Oct 2023, 13:26 | 1.99 | 1.99 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.037 mg/l
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 0.037 | 0.037 mg/l |
| 12 May 2026, 11:24 | 0.018 | 0.018 mg/l |
| 22 Apr 2026, 14:02 | 0.02 | 0.02 mg/l |
| 16 Mar 2026, 14:57 | 0.026 | 0.026 mg/l |
| 24 Feb 2026, 14:36 | 0.022 | 0.022 mg/l |
| 29 Jan 2026, 12:18 | 0.02 | 0.02 mg/l |
| 9 Dec 2025, 11:00 | 0.038 | 0.038 mg/l |
| 6 Nov 2025, 13:17 | 0.02 | 0.02 mg/l |
| 14 Oct 2025, 11:18 | 0.032 | 0.032 mg/l |
| 25 Sep 2025, 09:33 | 0.039 | 0.039 mg/l |
| 6 Aug 2025, 09:50 | 0.065 | 0.065 mg/l |
| 1 Jul 2025, 13:43 | 0.12 | 0.12 mg/l |
| 2 Jun 2025, 11:32 | 0.11 | 0.11 mg/l |
| 28 May 2025, 12:44 | 0.079 | 0.079 mg/l |
| 13 May 2025, 13:12 | 0.15 | 0.15 mg/l |
| 25 Apr 2025, 11:18 | 0.072 | 0.072 mg/l |
| 9 Apr 2025, 09:58 | 0.075 | 0.075 mg/l |
| 19 Mar 2025, 10:27 | 0.078 | 0.078 mg/l |
| 11 Dec 2024, 12:38 | 0.035 | 0.035 mg/l |
| 26 Nov 2024, 13:19 | 0.035 | 0.035 mg/l |
| 22 Oct 2024, 11:58 | 0.078 | 0.078 mg/l |
| 19 Sep 2024, 10:40 | 0.2 | 0.2 mg/l |
| 22 Aug 2024, 07:24 | 0.21 | 0.21 mg/l |
| 17 Jul 2024, 07:19 | 0.15 | 0.15 mg/l |
| 8 Mar 2024, 11:01 | 0.08 | 0.08 mg/l |
| 8 Feb 2024, 10:10 | 0.062 | 0.062 mg/l |
| 10 Jan 2024, 12:11 | 0.055 | 0.055 mg/l |
| 15 Dec 2023, 10:44 | 0.041 | 0.041 mg/l |
| 13 Nov 2023, 10:10 | 0.066 | 0.066 mg/l |
| 10 Oct 2023, 13:26 | 0.05 | 0.05 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
260 µS/cm
Sampled 15 Jun 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:39 | 260 | 260 µS/cm |
| 12 May 2026, 11:24 | 302 | 302 µS/cm |
| 22 Apr 2026, 14:02 | 256 | 256 µS/cm |
| 16 Mar 2026, 14:57 | 220 | 220 µS/cm |
| 24 Feb 2026, 14:36 | 207 | 207 µS/cm |
| 29 Jan 2026, 12:18 | 122 | 122 µS/cm |
| 9 Dec 2025, 11:00 | 100 | 100 µS/cm |
| 6 Nov 2025, 13:17 | 252 | 252 µS/cm |
| 14 Oct 2025, 11:18 | 262 | 262 µS/cm |
| 25 Sep 2025, 09:33 | 246 | 246 µS/cm |
| 6 Aug 2025, 09:50 | 286 | 286 µS/cm |
| 1 Jul 2025, 13:43 | 327 | 327 µS/cm |
| 2 Jun 2025, 11:32 | 296 | 296 µS/cm |
| 28 May 2025, 12:44 | 258 | 258 µS/cm |
| 13 May 2025, 13:12 | 361 | 361 µS/cm |
| 25 Apr 2025, 11:18 | 314 | 314 µS/cm |
| 9 Apr 2025, 09:58 | 313 | 313 µS/cm |
| 19 Mar 2025, 10:27 | 329 | 329 µS/cm |
| 11 Dec 2024, 12:38 | 225 | 225 µS/cm |
| 26 Nov 2024, 13:19 | 193 | 193 µS/cm |
| 22 Oct 2024, 11:58 | 206 | 206 µS/cm |
| 19 Sep 2024, 10:40 | 313 | 313 µS/cm |
| 22 Aug 2024, 07:24 | 285 | 285 µS/cm |
| 17 Jul 2024, 07:19 | 239 | 239 µS/cm |
| 8 Mar 2024, 11:01 | 231 | 231 µS/cm |
| 8 Feb 2024, 10:10 | 215 | 215 µS/cm |
| 10 Jan 2024, 12:11 | 279 | 279 µS/cm |
| 15 Dec 2023, 10:44 | 198 | 198 µS/cm |
| 13 Nov 2023, 10:10 | 201 | 201 µS/cm |
| 10 Oct 2023, 13:26 | 222 | 222 µS/cm |
Everything measured here
80 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 80 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – Jun 2026 | 99.8% 15 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – Jun 2026 | 10.2 mg/l 15 Jun 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – Jun 2026 | 14.1 °C 15 Jun 2026 |
| pH 0061 | River water | 30 | Oct 2023 – Jun 2026 | 7.83 15 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – Jun 2026 | 0.063 mg/l 15 Jun 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Jun 2026 | 2.88 mg/l 15 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Oct 2023 – Jun 2026 | 0.037 mg/l 15 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 30 | Oct 2023 – Jun 2026 | 260 µS/cm 15 Jun 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Jun 2026 | 39 mg/l 15 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – Jun 2026 | 0.00106 mg/l 15 Jun 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jul 2024 – Jun 2026 | 1.2 mg/l 15 Jun 2026 |
| Chromium 3164 | River water | 6 | Oct 2023 – Mar 2024 | 2 µg/l 8 Mar 2024 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | River water | 5 | Nov 2023 – Mar 2024 | 1.6 µg/l 8 Mar 2024 |
| Chromium, Dissolved 3409 | River water | 5 | Oct 2023 – Mar 2024 | 1.9 µg/l 8 Mar 2024 |
| Copper 6452 | River water | 6 | Oct 2023 – Mar 2024 | 2 µg/l 8 Mar 2024 |
| Copper, Dissolved 6450 | River water | 5 | Oct 2023 – Mar 2024 | 1.4 µg/l 8 Mar 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Dec 2025 – Dec 2025 | 0.0011 µg/l 9 Dec 2025 |
| Iron 6051 | River water | 6 | Oct 2023 – Mar 2024 | 420 µg/l 8 Mar 2024 |
| Iron, Dissolved 6460 | River water | 5 | Oct 2023 – Mar 2024 | 200 µg/l 8 Mar 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Jun 2026 | 0.024 mg/l 15 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – Jun 2026 | 2.9 mg/l 15 Jun 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | Dec 2025 – Dec 2025 | 0.0014 µg/l 9 Dec 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Dec 2025 – Dec 2025 | below 0.005 µg/l 9 Dec 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | Dec 2025 – Dec 2025 | 0.00078 µg/l 9 Dec 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorononanoic acid 8891 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Dec 2025 – Dec 2025 | 0.00087 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Dec 2025 – Dec 2025 | 0.00064 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Dec 2025 – Dec 2025 | 0.0015 µg/l 9 Dec 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | Dec 2025 – Dec 2025 | 0.0054 µg/l 9 Dec 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Dec 2025 – Dec 2025 | below 0.006 µg/l 9 Dec 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
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.