River Gwash Newstead Mill Stamford
EA name: R.GWASH NEWSTEAD MILL STAMFORD
Environment Agency sampling point AN-GWSH320N · 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
- 10 Sep 2026, 10:2921 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 504741, 307810As published, to the nearest 1 m. Open in a map
- River, by its own name
- Gwash
- River, by the map
- River GwashPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Tallington On the River Welland · 5.8 km along the river
- Nearest gauge upstream
- BELMESTHORPE GS GSM 4.3 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (23 samples)
Planned investigation (local monitoring) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.5%
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 90.5 | 90.5% |
| 3 Aug 2026, 12:33 | 95.4 | 95.4% |
| 8 Jul 2026, 10:01 | 91.6 | 91.6% |
| 18 Jun 2026, 09:41 | 93.6 | 93.6% |
| 14 May 2026, 09:59 | 90.2 | 90.2% |
| 22 Apr 2026, 10:53 | 104.7 | 104.7% |
| 13 Mar 2026, 11:30 | 98.1 | 98.1% |
| 24 Feb 2026, 09:29 | 94.8 | 94.8% |
| 9 Jan 2026, 13:14 | 94.3 | 94.3% |
| 5 Dec 2025, 12:00 | 94.1 | 94.1% |
| 6 Nov 2025, 11:59 | 84.3 | 84.3% |
| 8 Oct 2025, 14:00 | 93.1 | 93.1% |
| 25 Apr 2025, 12:39 | 110.6 | 110.6% |
| 10 Mar 2025, 12:06 | 101.6 | 101.6% |
| 5 Feb 2025, 11:18 | 97.1 | 97.1% |
| 13 Jan 2025, 13:02 | 99.9 | 99.9% |
| 2 Dec 2024, 09:53 | 91.7 | 91.7% |
| 13 Nov 2024, 14:38 | 92.3 | 92.3% |
| 4 Oct 2024, 10:58 | 88.5 | 88.5% |
| 20 Sep 2024, 15:06 | 99.3 | 99.3% |
| 15 Aug 2024, 13:56 | 90.2 | 90.2% |
| 5 Jul 2024, 12:01 | 105 | 105% |
| 10 Jun 2024, 10:59 | 99.4 | 99.4% |
| 4 Mar 2024, 11:22 | 97.6 | 97.6% |
| 9 Feb 2024, 09:21 | 95.8 | 95.8% |
| 4 Jan 2024, 11:05 | 91.9 | 91.9% |
| 5 Dec 2023, 09:54 | 90.1 | 90.1% |
| 13 Nov 2023, 09:08 | 93.7 | 93.7% |
| 2 Oct 2023, 10:28 | 89 | 89% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.28 mg/l
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 9.28 | 9.28 mg/l |
| 3 Aug 2026, 12:33 | 9.2 | 9.2 mg/l |
| 8 Jul 2026, 10:01 | 8.48 | 8.48 mg/l |
| 18 Jun 2026, 09:41 | 9.1 | 9.1 mg/l |
| 14 May 2026, 09:59 | 10.2 | 10.2 mg/l |
| 22 Apr 2026, 10:53 | 11.8 | 11.8 mg/l |
| 13 Mar 2026, 11:30 | 11.4 | 11.4 mg/l |
| 24 Feb 2026, 09:29 | 10.7 | 10.7 mg/l |
| 9 Jan 2026, 13:14 | 11.9 | 11.9 mg/l |
| 5 Dec 2025, 12:00 | 11.7 | 11.7 mg/l |
| 6 Nov 2025, 11:59 | 8.94 | 8.94 mg/l |
| 8 Oct 2025, 14:00 | 9.68 | 9.68 mg/l |
| 25 Apr 2025, 12:39 | 12.3 | 12.3 mg/l |
| 10 Mar 2025, 12:06 | 11.9 | 11.9 mg/l |
| 5 Feb 2025, 11:18 | 11.8 | 11.8 mg/l |
| 13 Jan 2025, 13:02 | 12.5 | 12.5 mg/l |
| 2 Dec 2024, 09:53 | 10.5 | 10.5 mg/l |
| 13 Nov 2024, 14:38 | 10.7 | 10.7 mg/l |
| 4 Oct 2024, 10:58 | 9.78 | 9.78 mg/l |
| 20 Sep 2024, 15:06 | 9.86 | 9.86 mg/l |
| 15 Aug 2024, 13:56 | 8.88 | 8.88 mg/l |
| 5 Jul 2024, 12:01 | 10.7 | 10.7 mg/l |
| 10 Jun 2024, 10:59 | 10.6 | 10.6 mg/l |
| 4 Mar 2024, 11:22 | 11.6 | 11.6 mg/l |
| 9 Feb 2024, 09:21 | 11.4 | 11.4 mg/l |
| 4 Jan 2024, 11:05 | 10.8 | 10.8 mg/l |
| 5 Dec 2023, 09:54 | 10.9 | 10.9 mg/l |
| 13 Nov 2023, 09:08 | 10.8 | 10.8 mg/l |
| 2 Oct 2023, 10:28 | 8.95 | 8.95 mg/l |
Water temperature
code 0076 · °C
14.1 °C
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 14.1 | 14.1 °C |
| 3 Aug 2026, 12:33 | 17 | 17 °C |
| 8 Jul 2026, 10:01 | 19 | 19 °C |
| 18 Jun 2026, 09:41 | 16.6 | 16.6 °C |
| 14 May 2026, 09:59 | 9.8 | 9.8 °C |
| 22 Apr 2026, 10:53 | 10.1 | 10.1 °C |
| 13 Mar 2026, 11:30 | 8.7 | 8.7 °C |
| 24 Feb 2026, 09:29 | 10 | 10 °C |
| 9 Jan 2026, 13:14 | 5.4 | 5.4 °C |
| 5 Dec 2025, 12:00 | 6 | 6 °C |
| 6 Nov 2025, 11:59 | 12.6 | 12.6 °C |
| 8 Oct 2025, 14:00 | 13.5 | 13.5 °C |
| 25 Apr 2025, 12:39 | 10.5 | 10.5 °C |
| 10 Mar 2025, 12:06 | 8.4 | 8.4 °C |
| 5 Feb 2025, 11:18 | 6.8 | 6.8 °C |
| 13 Jan 2025, 13:02 | 5.8 | 5.8 °C |
| 2 Dec 2024, 09:53 | 9.5 | 9.5 °C |
| 13 Nov 2024, 14:38 | 8.8 | 8.8 °C |
| 4 Oct 2024, 10:58 | 10.8 | 10.8 °C |
| 20 Sep 2024, 15:06 | 15.6 | 15.6 °C |
| 15 Aug 2024, 13:56 | 16 | 16 °C |
| 5 Jul 2024, 12:01 | 14.6 | 14.6 °C |
| 10 Jun 2024, 10:59 | 12.2 | 12.2 °C |
| 4 Mar 2024, 11:22 | 7.7 | 7.7 °C |
| 9 Feb 2024, 09:21 | 7.7 | 7.7 °C |
| 4 Jan 2024, 11:05 | 8.3 | 8.3 °C |
| 5 Dec 2023, 09:54 | 7.1 | 7.1 °C |
| 13 Nov 2023, 09:08 | 9 | 9 °C |
| 2 Oct 2023, 10:28 | 15 | 15 °C |
pH
code 0061
8.08
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 8.08 | 8.08 |
| 3 Aug 2026, 12:33 | 8.03 | 8.03 |
| 8 Jul 2026, 10:01 | 8.06 | 8.06 |
| 18 Jun 2026, 09:41 | 8.2 | 8.2 |
| 14 May 2026, 09:59 | 8.18 | 8.18 |
| 22 Apr 2026, 10:53 | 8.35 | 8.35 |
| 13 Mar 2026, 11:30 | 8.14 | 8.14 |
| 24 Feb 2026, 09:29 | 8.04 | 8.04 |
| 9 Jan 2026, 13:14 | 8.04 | 8.04 |
| 5 Dec 2025, 12:00 | 8.13 | 8.13 |
| 6 Nov 2025, 11:59 | 7.96 | 7.96 |
| 8 Oct 2025, 14:00 | 8.17 | 8.17 |
| 25 Apr 2025, 12:39 | 8.48 | 8.48 |
| 10 Mar 2025, 12:06 | 8.14 | 8.14 |
| 5 Feb 2025, 11:18 | 8.18 | 8.18 |
| 13 Jan 2025, 13:02 | 8.22 | 8.22 |
| 2 Dec 2024, 09:53 | 8.13 | 8.13 |
| 13 Nov 2024, 14:38 | 8.25 | 8.25 |
| 4 Oct 2024, 10:58 | 7.96 | 7.96 |
| 20 Sep 2024, 15:06 | 8.17 | 8.17 |
| 15 Aug 2024, 13:56 | 8 | 8 |
| 5 Jul 2024, 12:01 | 8.32 | 8.32 |
| 10 Jun 2024, 10:59 | 8.29 | 8.29 |
| 4 Mar 2024, 11:22 | 8.2 | 8.2 |
| 9 Feb 2024, 09:21 | 8.08 | 8.08 |
| 4 Jan 2024, 11:05 | 7.84 | 7.84 |
| 5 Dec 2023, 09:54 | 7.99 | 7.99 |
| 13 Nov 2023, 09:08 | 7.99 | 7.99 |
| 2 Oct 2023, 10:28 | 8.01 | 8.01 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Aug 2026, 12:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2026, 10:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2026, 09:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2026, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2026, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Feb 2026, 09:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2026, 13:14 | 0.088 | 0.088 mg/l |
| 5 Dec 2025, 12:00 | 0.035 | 0.035 mg/l |
| 6 Nov 2025, 11:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Oct 2025, 14:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Apr 2025, 12:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2025, 12:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jan 2025, 13:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2024, 14:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Sep 2024, 15:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2024, 13:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jul 2024, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jun 2024, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 11:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2024, 09:21 | 0.049 | 0.049 mg/l |
| 4 Jan 2024, 11:05 | 0.034 | 0.034 mg/l |
| 5 Dec 2023, 09:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2023, 09:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2023, 10:28 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.99 mg/l
Sampled 10 Sep 2026, 21 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 7.99 | 7.99 mg/l |
| 3 Aug 2026, 12:33 | 7.99 | 7.99 mg/l |
| 8 Jul 2026, 10:01 | 7.78 | 7.78 mg/l |
| 18 Jun 2026, 09:41 | 8.78 | 8.78 mg/l |
| 14 May 2026, 09:59 | 9.88 | 9.88 mg/l |
| 22 Apr 2026, 10:53 | 11 | 11 mg/l |
| 13 Mar 2026, 11:30 | 12 | 12 mg/l |
| 24 Feb 2026, 09:29 | 13 | 13 mg/l |
| 9 Jan 2026, 13:14 | 9.87 | 9.87 mg/l |
| 5 Dec 2025, 12:00 | 8.17 | 8.17 mg/l |
| 6 Nov 2025, 11:59 | 5.87 | 5.87 mg/l |
| 8 Oct 2025, 14:00 | 5.79 | 5.79 mg/l |
| 25 Apr 2025, 12:39 | 8.39 | 8.39 mg/l |
| 10 Mar 2025, 12:06 | 11 | 11 mg/l |
| 5 Feb 2025, 11:18 | 11 | 11 mg/l |
| 13 Jan 2025, 13:02 | 11 | 11 mg/l |
| 13 Nov 2024, 14:38 | 9.19 | 9.19 mg/l |
| 4 Oct 2024, 10:58 | 7.69 | 7.69 mg/l |
| 20 Sep 2024, 15:06 | 6.79 | 6.79 mg/l |
| 15 Aug 2024, 13:56 | 3.19 | 3.19 mg/l |
| 5 Jul 2024, 12:01 | 9.49 | 9.49 mg/l |
| 10 Jun 2024, 10:59 | 9.49 | 9.49 mg/l |
| 4 Mar 2024, 11:22 | 12 | 12 mg/l |
| 9 Feb 2024, 09:21 | 9.67 | 9.67 mg/l |
| 4 Jan 2024, 11:05 | 11 | 11 mg/l |
| 5 Dec 2023, 09:54 | 9.38 | 9.38 mg/l |
| 13 Nov 2023, 09:08 | 9.98 | 9.98 mg/l |
| 2 Oct 2023, 10:28 | 7.38 | 7.38 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.27 mg/l
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 0.27 | 0.27 mg/l |
| 3 Aug 2026, 12:33 | 0.2 | 0.2 mg/l |
| 8 Jul 2026, 10:01 | 0.16 | 0.16 mg/l |
| 18 Jun 2026, 09:41 | 0.18 | 0.18 mg/l |
| 14 May 2026, 09:59 | 0.083 | 0.083 mg/l |
| 22 Apr 2026, 10:53 | 0.055 | 0.055 mg/l |
| 13 Mar 2026, 11:30 | 0.066 | 0.066 mg/l |
| 24 Feb 2026, 09:29 | 0.049 | 0.049 mg/l |
| 9 Jan 2026, 13:14 | 0.12 | 0.12 mg/l |
| 5 Dec 2025, 12:00 | 0.15 | 0.15 mg/l |
| 6 Nov 2025, 11:59 | 0.22 | 0.22 mg/l |
| 8 Oct 2025, 14:00 | 0.21 | 0.21 mg/l |
| 25 Apr 2025, 12:39 | 0.077 | 0.077 mg/l |
| 10 Mar 2025, 12:06 | 0.076 | 0.076 mg/l |
| 5 Feb 2025, 11:18 | 0.083 | 0.083 mg/l |
| 13 Jan 2025, 13:02 | 0.078 | 0.078 mg/l |
| 2 Dec 2024, 09:53 | 0.093 | 0.093 mg/l |
| 13 Nov 2024, 14:38 | 0.12 | 0.12 mg/l |
| 4 Oct 2024, 10:58 | 0.13 | 0.13 mg/l |
| 20 Sep 2024, 15:06 | 0.14 | 0.14 mg/l |
| 15 Aug 2024, 13:56 | 0.16 | 0.16 mg/l |
| 5 Jul 2024, 12:01 | 0.12 | 0.12 mg/l |
| 10 Jun 2024, 10:59 | 0.097 | 0.097 mg/l |
| 4 Mar 2024, 11:22 | 0.055 | 0.055 mg/l |
| 9 Feb 2024, 09:21 | 0.099 | 0.099 mg/l |
| 4 Jan 2024, 11:05 | 0.05 | 0.05 mg/l |
| 5 Dec 2023, 09:54 | 0.09 | 0.09 mg/l |
| 13 Nov 2023, 09:08 | 0.069 | 0.069 mg/l |
| 2 Oct 2023, 10:28 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
798 µS/cm
Sampled 10 Sep 2026, 21 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:29 | 798 | 798 µS/cm |
| 3 Aug 2026, 12:33 | 796 | 796 µS/cm |
| 8 Jul 2026, 10:01 | 803 | 803 µS/cm |
| 18 Jun 2026, 09:41 | 784 | 784 µS/cm |
| 14 May 2026, 09:59 | 743 | 743 µS/cm |
| 22 Apr 2026, 10:53 | 752 | 752 µS/cm |
| 13 Mar 2026, 11:30 | 711 | 711 µS/cm |
| 24 Feb 2026, 09:29 | 735 | 735 µS/cm |
| 9 Jan 2026, 13:14 | 735 | 735 µS/cm |
| 5 Dec 2025, 12:00 | 710 | 710 µS/cm |
| 6 Nov 2025, 11:59 | 740 | 740 µS/cm |
| 8 Oct 2025, 14:00 | 736 | 736 µS/cm |
| 25 Apr 2025, 12:39 | 726 | 726 µS/cm |
| 10 Mar 2025, 12:06 | 755 | 755 µS/cm |
| 5 Feb 2025, 11:18 | 748 | 748 µS/cm |
| 13 Jan 2025, 13:02 | 722 | 722 µS/cm |
| 2 Dec 2024, 09:53 | 727 | 727 µS/cm |
| 13 Nov 2024, 14:38 | 786 | 786 µS/cm |
| 4 Oct 2024, 10:58 | 718 | 718 µS/cm |
| 20 Sep 2024, 15:06 | 729 | 729 µS/cm |
| 15 Aug 2024, 13:56 | 928 | 928 µS/cm |
| 5 Jul 2024, 12:01 | 763 | 763 µS/cm |
| 10 Jun 2024, 10:59 | 739 | 739 µS/cm |
| 4 Mar 2024, 11:22 | 759 | 759 µS/cm |
| 9 Feb 2024, 09:21 | 705 | 705 µS/cm |
| 4 Jan 2024, 11:05 | 667 | 667 µS/cm |
| 5 Dec 2023, 09:54 | 693 | 693 µS/cm |
| 13 Nov 2023, 09:08 | 765 | 765 µS/cm |
| 2 Oct 2023, 10:28 | 788 | 788 µS/cm |
Everything measured here
59 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 59 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – Sep 2026 | 90.5% 10 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Sep 2026 | 9.28 mg/l 10 Sep 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Sep 2026 | 14.1 °C 10 Sep 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Sep 2026 | 8.08 10 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Sep 2026 | below 0.03 mg/l 10 Sep 2026 |
| Nitrate as N 0117 | River water | 28 | Oct 2023 – Sep 2026 | 7.99 mg/l 10 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Sep 2026 | 0.27 mg/l 10 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Sep 2026 | 798 µS/cm 10 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jul 2024 – Jul 2024 | below 0.004 µg/l 5 Jul 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 5 Jul 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jul 2024 – Jul 2024 | 0.0019 µg/l 5 Jul 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Sep 2026 | 230 mg/l 10 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Sep 2026 | below 0.00074 mg/l 10 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 6 | Oct 2023 – Mar 2024 | 1.2 mg/l 4 Mar 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Sep 2026 | 0.015 mg/l 10 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Oct 2023 – Sep 2026 | 8 mg/l 10 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jul 2024 – Jul 2024 | 0.0012 µg/l 5 Jul 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jul 2024 – Jul 2024 | 0.0022 µg/l 5 Jul 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 5 Jul 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jul 2024 – Jul 2024 | 0.0017 µg/l 5 Jul 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jul 2024 – Jul 2024 | 0.0015 µg/l 5 Jul 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jul 2024 – Jul 2024 | 0.0033 µg/l 5 Jul 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 5 Jul 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jul 2024 – Jul 2024 | 0.00081 µg/l 5 Jul 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jul 2024 – Jul 2024 | 0.0011 µg/l 5 Jul 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 5 Jul 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jul 2024 – Jul 2024 | 0.0047 µg/l 5 Jul 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jul 2024 – Jul 2024 | below 0.006 µg/l 5 Jul 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 5 Jul 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jul 2024 – Jul 2024 | below 0.004 µg/l 5 Jul 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 5 Jul 2024 |
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.