Colly Brook, Whitton
EA name: COLLY BROOK, WHITTON (also listed as “RSN1834 COLLY BROOK, WHITTON”)
Environment Agency sampling point MD-RSN1834 · 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
- 17 Aug 2026, 14:2645 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 since 25 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 357568, 272249As published, to the nearest 1 m. Open in a map
- River, by its own name
- Colly Brook
- River, by the map
- Colly BrookPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Burford Bridge On the Ledwyche Brook · 7.3 km along the river
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.7%
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 97.7 | 97.7% |
| 29 Jul 2026, 12:39 | 97.9 | 97.9% |
| 1 May 2026, 12:42 | 102.2 | 102.2% |
| 29 Apr 2026, 10:20 | 103 | 103% |
| 13 Mar 2026, 10:37 | 94.4 | 94.4% |
| 19 Dec 2025, 12:35 | 99.1 | 99.1% |
| 10 Nov 2025, 11:36 | 94.5 | 94.5% |
| 27 Oct 2025, 12:50 | 96.4 | 96.4% |
| 4 Sep 2025, 10:33 | 91.4 | 91.4% |
| 1 Aug 2025, 10:08 | 95.7 | 95.7% |
| 9 Jul 2025, 09:41 | 99 | 99% |
| 20 Jun 2025, 12:05 | 98.1 | 98.1% |
| 6 May 2025, 11:18 | 101.7 | 101.7% |
| 9 Apr 2025, 12:01 | 105 | 105% |
| 7 Mar 2025, 10:04 | 99.6 | 99.6% |
| 19 Feb 2025, 10:07 | 100 | 100% |
| 22 Jan 2025, 12:26 | 100.8 | 100.8% |
| 23 Dec 2024, 11:06 | 99.4 | 99.4% |
| 14 Nov 2024, 13:03 | 92.6 | 92.6% |
| 9 Aug 2024, 10:35 | 96.7 | 96.7% |
| 7 Jun 2024, 09:03 | 95.1 | 95.1% |
| 10 May 2024, 12:01 | 97.8 | 97.8% |
| 24 Apr 2024, 12:53 | 99.4 | 99.4% |
| 8 Mar 2024, 10:22 | 101.5 | 101.5% |
| 1 Feb 2024, 11:00 | 101.6 | 101.6% |
| 11 Jan 2024, 14:57 | 101.5 | 101.5% |
| 1 Dec 2023, 13:11 | 98.8 | 98.8% |
| 9 Nov 2023, 10:24 | 91.3 | 91.3% |
| 25 Oct 2023, 13:00 | 88.3 | 88.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.4 mg/l
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 9.4 | 9.4 mg/l |
| 29 Jul 2026, 12:39 | 9.3 | 9.3 mg/l |
| 1 May 2026, 12:42 | 10.8 | 10.8 mg/l |
| 29 Apr 2026, 10:20 | 11.9 | 11.9 mg/l |
| 13 Mar 2026, 10:37 | 11.4 | 11.4 mg/l |
| 19 Dec 2025, 12:35 | 11.6 | 11.6 mg/l |
| 10 Nov 2025, 11:36 | 10.6 | 10.6 mg/l |
| 27 Oct 2025, 12:50 | 11 | 11 mg/l |
| 4 Sep 2025, 10:33 | 9.52 | 9.52 mg/l |
| 1 Aug 2025, 10:08 | 9.88 | 9.88 mg/l |
| 9 Jul 2025, 09:41 | 10.1 | 10.1 mg/l |
| 20 Jun 2025, 12:05 | 9.28 | 9.28 mg/l |
| 6 May 2025, 11:18 | 11.6 | 11.6 mg/l |
| 9 Apr 2025, 12:01 | 12.1 | 12.1 mg/l |
| 7 Mar 2025, 10:04 | 11.7 | 11.7 mg/l |
| 19 Feb 2025, 10:07 | 13.2 | 13.2 mg/l |
| 22 Jan 2025, 12:26 | 12.6 | 12.6 mg/l |
| 23 Dec 2024, 11:06 | 12.4 | 12.4 mg/l |
| 14 Nov 2024, 13:03 | 10.4 | 10.4 mg/l |
| 9 Aug 2024, 10:35 | 9.42 | 9.42 mg/l |
| 7 Jun 2024, 09:03 | 10.4 | 10.4 mg/l |
| 10 May 2024, 12:01 | 9.9 | 9.9 mg/l |
| 24 Apr 2024, 12:53 | 11.1 | 11.1 mg/l |
| 8 Mar 2024, 10:22 | 12.5 | 12.5 mg/l |
| 1 Feb 2024, 11:00 | 12.7 | 12.7 mg/l |
| 11 Jan 2024, 14:57 | 12.7 | 12.7 mg/l |
| 1 Dec 2023, 13:11 | 12.9 | 12.9 mg/l |
| 9 Nov 2023, 10:24 | 10.6 | 10.6 mg/l |
| 25 Oct 2023, 13:00 | 9.88 | 9.88 mg/l |
Water temperature
code 0076 · °C
17.1 °C
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 17.1 | 17.1 °C |
| 29 Jul 2026, 12:39 | 17.7 | 17.7 °C |
| 1 May 2026, 12:42 | 12.6 | 12.6 °C |
| 29 Apr 2026, 10:20 | 9.1 | 9.1 °C |
| 13 Mar 2026, 10:37 | 7.1 | 7.1 °C |
| 19 Dec 2025, 12:35 | 8.4 | 8.4 °C |
| 10 Nov 2025, 11:36 | 10 | 10 °C |
| 27 Oct 2025, 12:50 | 9.5 | 9.5 °C |
| 4 Sep 2025, 10:33 | 13.4 | 13.4 °C |
| 1 Aug 2025, 10:08 | 13.8 | 13.8 °C |
| 9 Jul 2025, 09:41 | 14.3 | 14.3 °C |
| 20 Jun 2025, 12:05 | 17.9 | 17.9 °C |
| 6 May 2025, 11:18 | 9.3 | 9.3 °C |
| 9 Apr 2025, 12:01 | 9.2 | 9.2 °C |
| 7 Mar 2025, 10:04 | 8.4 | 8.4 °C |
| 19 Feb 2025, 10:07 | 3.8 | 3.8 °C |
| 22 Jan 2025, 12:26 | 5.7 | 5.7 °C |
| 23 Dec 2024, 11:06 | 5.8 | 5.8 °C |
| 14 Nov 2024, 13:03 | 10.2 | 10.2 °C |
| 9 Aug 2024, 10:35 | 16.5 | 16.5 °C |
| 7 Jun 2024, 09:03 | 11.1 | 11.1 °C |
| 10 May 2024, 12:01 | 14.7 | 14.7 °C |
| 24 Apr 2024, 12:53 | 10.4 | 10.4 °C |
| 8 Mar 2024, 10:22 | 6.5 | 6.5 °C |
| 1 Feb 2024, 11:00 | 5.7 | 5.7 °C |
| 11 Jan 2024, 14:57 | 5.6 | 5.6 °C |
| 1 Dec 2023, 13:11 | 4.2 | 4.2 °C |
| 9 Nov 2023, 10:24 | 8.7 | 8.7 °C |
| 25 Oct 2023, 13:00 | 10.3 | 10.3 °C |
pH
code 0061
8.1
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 8.1 | 8.1 |
| 29 Jul 2026, 12:39 | 8.21 | 8.21 |
| 1 May 2026, 12:42 | 8.41 | 8.41 |
| 29 Apr 2026, 10:20 | 8.5 | 8.5 |
| 13 Mar 2026, 10:37 | 8.29 | 8.29 |
| 19 Dec 2025, 12:35 | 8.05 | 8.05 |
| 10 Nov 2025, 11:36 | 7.96 | 7.96 |
| 27 Oct 2025, 12:50 | 8.14 | 8.14 |
| 4 Sep 2025, 10:33 | 8.29 | 8.29 |
| 1 Aug 2025, 10:08 | 8.27 | 8.27 |
| 9 Jul 2025, 09:41 | 8.33 | 8.33 |
| 20 Jun 2025, 12:05 | 8.24 | 8.24 |
| 6 May 2025, 11:18 | 8.35 | 8.35 |
| 9 Apr 2025, 12:01 | 8.36 | 8.36 |
| 7 Mar 2025, 10:04 | 8.27 | 8.27 |
| 19 Feb 2025, 10:07 | 8.03 | 8.03 |
| 22 Jan 2025, 12:26 | 8.17 | 8.17 |
| 23 Dec 2024, 11:06 | 7.93 | 7.93 |
| 14 Nov 2024, 13:03 | 8.19 | 8.19 |
| 9 Aug 2024, 10:35 | 8.14 | 8.14 |
| 7 Jun 2024, 09:03 | 8.35 | 8.35 |
| 10 May 2024, 12:01 | 8.37 | 8.37 |
| 24 Apr 2024, 12:53 | 8.46 | 8.46 |
| 8 Mar 2024, 10:22 | 8.35 | 8.35 |
| 1 Feb 2024, 11:00 | 8.27 | 8.27 |
| 11 Jan 2024, 14:57 | 8.25 | 8.25 |
| 1 Dec 2023, 13:11 | 8.25 | 8.25 |
| 9 Nov 2023, 10:24 | 8.12 | 8.12 |
| 25 Oct 2023, 13:00 | 8.14 | 8.14 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2026, 12:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2026, 12:42 | 0.29 | 0.29 mg/l |
| 29 Apr 2026, 10:20 | 0.04 | 0.04 mg/l |
| 13 Mar 2026, 10:37 | 0.12 | 0.12 mg/l |
| 19 Dec 2025, 12:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Nov 2025, 11:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Oct 2025, 12:50 | 0.071 | 0.071 mg/l |
| 4 Sep 2025, 10:33 | 0.47 | 0.47 mg/l |
| 1 Aug 2025, 10:08 | 0.033 | 0.033 mg/l |
| 9 Jul 2025, 09:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2025, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 May 2025, 11:18 | 0.03 | 0.03 mg/l |
| 9 Apr 2025, 12:01 | 0.074 | 0.074 mg/l |
| 7 Mar 2025, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2025, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 12:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Dec 2024, 11:06 | 0.042 | 0.042 mg/l |
| 14 Nov 2024, 13:03 | 0.13 | 0.13 mg/l |
| 9 Aug 2024, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jun 2024, 09:03 | 0.16 | 0.16 mg/l |
| 10 May 2024, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Apr 2024, 12:53 | 0.032 | 0.032 mg/l |
| 8 Mar 2024, 10:22 | 0.031 | 0.031 mg/l |
| 1 Feb 2024, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jan 2024, 14:57 | 0.041 | 0.041 mg/l |
| 1 Dec 2023, 13:11 | 0.034 | 0.034 mg/l |
| 9 Nov 2023, 10:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Oct 2023, 13:00 | 0.036 | 0.036 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.926 mg/l
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 0.926 | 0.926 mg/l |
| 29 Jul 2026, 12:39 | 1.1 | 1.1 mg/l |
| 1 May 2026, 12:42 | 1.49 | 1.49 mg/l |
| 29 Apr 2026, 10:20 | 1.59 | 1.59 mg/l |
| 13 Mar 2026, 10:37 | 1.99 | 1.99 mg/l |
| 19 Dec 2025, 12:35 | 3.39 | 3.39 mg/l |
| 10 Nov 2025, 11:36 | 2.1 | 2.1 mg/l |
| 27 Oct 2025, 12:50 | 1.5 | 1.5 mg/l |
| 4 Sep 2025, 10:33 | 1.19 | 1.19 mg/l |
| 1 Aug 2025, 10:08 | 1.4 | 1.4 mg/l |
| 9 Jul 2025, 09:41 | 1.1 | 1.1 mg/l |
| 20 Jun 2025, 12:05 | 1.09 | 1.09 mg/l |
| 6 May 2025, 11:18 | 1.79 | 1.79 mg/l |
| 9 Apr 2025, 12:01 | 2.09 | 2.09 mg/l |
| 7 Mar 2025, 10:04 | 2.39 | 2.39 mg/l |
| 19 Feb 2025, 10:07 | 2.39 | 2.39 mg/l |
| 22 Jan 2025, 12:26 | 2.29 | 2.29 mg/l |
| 23 Dec 2024, 11:06 | 2.39 | 2.39 mg/l |
| 14 Nov 2024, 13:03 | 1.98 | 1.98 mg/l |
| 9 Aug 2024, 10:35 | 1.5 | 1.5 mg/l |
| 7 Jun 2024, 09:03 | 1.88 | 1.88 mg/l |
| 10 May 2024, 12:01 | 2.19 | 2.19 mg/l |
| 24 Apr 2024, 12:53 | 2.49 | 2.49 mg/l |
| 8 Mar 2024, 10:22 | 2.69 | 2.69 mg/l |
| 1 Feb 2024, 11:00 | 2.49 | 2.49 mg/l |
| 11 Jan 2024, 14:57 | 2.69 | 2.69 mg/l |
| 1 Dec 2023, 13:11 | 2.39 | 2.39 mg/l |
| 9 Nov 2023, 10:24 | 2.59 | 2.59 mg/l |
| 25 Oct 2023, 13:00 | 2.79 | 2.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.12 mg/l
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 0.12 | 0.12 mg/l |
| 29 Jul 2026, 12:39 | 0.15 | 0.15 mg/l |
| 1 May 2026, 12:42 | 0.078 | 0.078 mg/l |
| 29 Apr 2026, 10:20 | 0.065 | 0.065 mg/l |
| 13 Mar 2026, 10:37 | 0.089 | 0.089 mg/l |
| 19 Dec 2025, 12:35 | 0.069 | 0.069 mg/l |
| 10 Nov 2025, 11:36 | 0.16 | 0.16 mg/l |
| 27 Oct 2025, 12:50 | 0.2 | 0.2 mg/l |
| 4 Sep 2025, 10:33 | 0.18 | 0.18 mg/l |
| 1 Aug 2025, 10:08 | 0.22 | 0.22 mg/l |
| 9 Jul 2025, 09:41 | 0.15 | 0.15 mg/l |
| 20 Jun 2025, 12:05 | 0.15 | 0.15 mg/l |
| 6 May 2025, 11:18 | 0.1 | 0.1 mg/l |
| 9 Apr 2025, 12:01 | 0.033 | 0.033 mg/l |
| 7 Mar 2025, 10:04 | 0.13 | 0.13 mg/l |
| 19 Feb 2025, 10:07 | 0.2 | 0.2 mg/l |
| 22 Jan 2025, 12:26 | 0.07 | 0.07 mg/l |
| 23 Dec 2024, 11:06 | 0.28 | 0.28 mg/l |
| 14 Nov 2024, 13:03 | 0.078 | 0.078 mg/l |
| 9 Aug 2024, 10:35 | 0.25 | 0.25 mg/l |
| 7 Jun 2024, 09:03 | 0.098 | 0.098 mg/l |
| 10 May 2024, 12:01 | 0.045 | 0.045 mg/l |
| 24 Apr 2024, 12:53 | 0.037 | 0.037 mg/l |
| 8 Mar 2024, 10:22 | 0.07 | 0.07 mg/l |
| 1 Feb 2024, 11:00 | 0.058 | 0.058 mg/l |
| 11 Jan 2024, 14:57 | 0.056 | 0.056 mg/l |
| 1 Dec 2023, 13:11 | 0.04 | 0.04 mg/l |
| 9 Nov 2023, 10:24 | 0.061 | 0.061 mg/l |
| 25 Oct 2023, 13:00 | 0.062 | 0.062 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
522 µS/cm
Sampled 17 Aug 2026, 45 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Aug 2026, 14:26 | 522 | 522 µS/cm |
| 29 Jul 2026, 12:39 | 520 | 520 µS/cm |
| 1 May 2026, 12:42 | 495 | 495 µS/cm |
| 29 Apr 2026, 10:20 | 489 | 489 µS/cm |
| 13 Mar 2026, 10:37 | 330 | 330 µS/cm |
| 19 Dec 2025, 12:35 | 306 | 306 µS/cm |
| 10 Nov 2025, 11:36 | 121 | 121 µS/cm |
| 27 Oct 2025, 12:50 | 515 | 515 µS/cm |
| 4 Sep 2025, 10:33 | 418 | 418 µS/cm |
| 1 Aug 2025, 10:08 | 515 | 515 µS/cm |
| 9 Jul 2025, 09:41 | 522 | 522 µS/cm |
| 20 Jun 2025, 12:05 | 515 | 515 µS/cm |
| 6 May 2025, 11:18 | 514 | 514 µS/cm |
| 9 Apr 2025, 12:01 | 496 | 496 µS/cm |
| 7 Mar 2025, 10:04 | 734 | 734 µS/cm |
| 19 Feb 2025, 10:07 | 467 | 467 µS/cm |
| 22 Jan 2025, 12:26 | 471 | 471 µS/cm |
| 23 Dec 2024, 11:06 | 419 | 419 µS/cm |
| 14 Nov 2024, 13:03 | 482 | 482 µS/cm |
| 9 Aug 2024, 10:35 | 506 | 506 µS/cm |
| 7 Jun 2024, 09:03 | 497 | 497 µS/cm |
| 10 May 2024, 12:01 | 546 | 546 µS/cm |
| 24 Apr 2024, 12:53 | 488 | 488 µS/cm |
| 8 Mar 2024, 10:22 | 460 | 460 µS/cm |
| 1 Feb 2024, 11:00 | 491 | 491 µS/cm |
| 11 Jan 2024, 14:57 | 467 | 467 µS/cm |
| 1 Dec 2023, 13:11 | 477 | 477 µS/cm |
| 9 Nov 2023, 10:24 | 414 | 414 µS/cm |
| 25 Oct 2023, 13:00 | 431 | 431 µS/cm |
Everything measured here
66 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 66 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – Aug 2026 | 97.7% 17 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Aug 2026 | 9.4 mg/l 17 Aug 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Aug 2026 | 17.1 °C 17 Aug 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Aug 2026 | 8.1 17 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Aug 2026 | below 0.03 mg/l 17 Aug 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Aug 2026 | 0.926 mg/l 17 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Aug 2026 | 0.12 mg/l 17 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Aug 2026 | 522 µS/cm 17 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jan 2024 – Jan 2025 | below 0.004 µg/l 22 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jan 2024 – Jan 2025 | below 0.005 µg/l 22 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Aug 2026 | 220 mg/l 17 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Aug 2026 | below 0.00092 mg/l 17 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 29 | Oct 2023 – Aug 2026 | 2.4 mg/l 17 Aug 2026 |
| Chloride 0172 | River water | 29 | Oct 2023 – Aug 2026 | 25 mg/l 17 Aug 2026 |
| Flow Type 2896 | River water | 18 | Aug 2024 – May 2026 | Moderate Flow 1 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Aug 2026 | below 0.004 mg/l 17 Aug 2026 |
| Nitrogen, Total as N 9686 | River water | 29 | Oct 2023 – Aug 2026 | 1.2 mg/l 17 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Aug 2026 | 0.93 mg/l 17 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jan 2024 – Jan 2025 | below 0.005 µg/l 22 Jan 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 22 Jan 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jan 2025 – Jan 2025 | below 0.001 µg/l 22 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jan 2024 – Jan 2025 | below 0.006 µg/l 22 Jan 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jan 2024 – Jan 2025 | below 0.005 µg/l 22 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jan 2024 – Jan 2025 | below 0.004 µg/l 22 Jan 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 22 Jan 2025 |
| Phosphorus, Total as P 0348 | River water | 29 | Oct 2023 – Aug 2026 | 0.13 mg/l 17 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 29 | Oct 2023 – Aug 2026 | 9.8 mg/l 17 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Dec 2025 – Aug 2026 | 9.5 mg/l 17 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.