Blackwater above Aldershot Town South sewage treatment works
EA name: BLACKWATER ABOVE ALDERSHOT TOWN SOUTH ST (also listed as “BLACKWATER ABOVE ALDERSHOT TOWN SOUTH STW”)
Environment Agency sampling point TH-PLDR0003 · 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
- 7 Jul 2026, 11:443 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 since 17 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 488190, 149950As published, to the nearest 10 m. Open in a map
- River, by its own name
- Blackwater
- River, by the map
- Blackwater RiverPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Farnborough On the River Blackwater · 7.4 km along the river
- Nearest gauge upstream
- Tongham On the River Blackwater · 0.6 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (33 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
56.4%
Sampled 7 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 56.4 | 56.4% |
| 12 Jun 2026, 10:02 | 64.9 | 64.9% |
| 28 May 2026, 09:04 | 56.3 | 56.3% |
| 30 Apr 2026, 08:57 | 78 | 78% |
| 18 Mar 2026, 10:07 | 86.8 | 86.8% |
| 16 Feb 2026, 12:08 | 85 | 85% |
| 7 Jan 2026, 11:18 | 87.5 | 87.5% |
| 11 Dec 2025, 10:26 | 78.6 | 78.6% |
| 19 Nov 2025, 11:17 | 77.5 | 77.5% |
| 9 Oct 2025, 11:31 | 52.3 | 52.3% |
| 11 Sep 2025, 09:37 | 62.8 | 62.8% |
| 8 Aug 2025, 12:04 | 57 | 57% |
| 14 Jul 2025, 11:27 | 56.6 | 56.6% |
| 26 Jun 2025, 10:38 | 48.8 | 48.8% |
| 22 May 2025, 12:12 | 67 | 67% |
| 16 Apr 2025, 14:37 | 86.9 | 86.9% |
| 5 Mar 2025, 10:37 | 91.5 | 91.5% |
| 10 Feb 2025, 10:23 | 89.3 | 89.3% |
| 23 Jan 2025, 09:39 | 90.4 | 90.4% |
| 5 Dec 2024, 10:23 | 82.6 | 82.6% |
| 18 Nov 2024, 11:54 | 79.4 | 79.4% |
| 18 Oct 2024, 12:50 | 74.8 | 74.8% |
| 19 Sep 2024, 09:54 | 63.8 | 63.8% |
| 27 Aug 2024, 09:18 | 63.7 | 63.7% |
| 15 Jul 2024, 10:18 | 69 | 69% |
| 21 Jun 2024, 12:59 | 76.5 | 76.5% |
| 11 Mar 2024, 11:34 | 88.4 | 88.4% |
| 7 Feb 2024, 10:37 | 88.2 | 88.2% |
| 22 Jan 2024, 12:29 | 86.8 | 86.8% |
| 28 Dec 2023, 11:05 | 80.1 | 80.1% |
| 6 Dec 2023, 10:59 | 90.6 | 90.6% |
| 1 Nov 2023, 10:19 | 76 | 76% |
| 17 Oct 2023, 09:33 | 72.7 | 72.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.22 mg/l
Sampled 7 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 5.22 | 5.22 mg/l |
| 12 Jun 2026, 10:02 | 6.49 | 6.49 mg/l |
| 28 May 2026, 09:04 | 5.33 | 5.33 mg/l |
| 30 Apr 2026, 08:57 | 8.62 | 8.62 mg/l |
| 18 Mar 2026, 10:07 | 9.97 | 9.97 mg/l |
| 16 Feb 2026, 12:08 | 10.1 | 10.1 mg/l |
| 7 Jan 2026, 11:18 | 11.5 | 11.5 mg/l |
| 11 Dec 2025, 10:26 | 9.11 | 9.11 mg/l |
| 19 Nov 2025, 11:17 | 9.05 | 9.05 mg/l |
| 9 Oct 2025, 11:31 | 5.64 | 5.64 mg/l |
| 11 Sep 2025, 09:37 | 6.37 | 6.37 mg/l |
| 8 Aug 2025, 12:04 | 5.52 | 5.52 mg/l |
| 14 Jul 2025, 11:27 | 5.25 | 5.25 mg/l |
| 26 Jun 2025, 10:38 | 4.63 | 4.63 mg/l |
| 22 May 2025, 12:12 | 6.98 | 6.98 mg/l |
| 16 Apr 2025, 14:37 | 9.22 | 9.22 mg/l |
| 5 Mar 2025, 10:37 | 11.5 | 11.5 mg/l |
| 10 Feb 2025, 10:23 | 11.3 | 11.3 mg/l |
| 23 Jan 2025, 09:39 | 11.7 | 11.7 mg/l |
| 5 Dec 2024, 10:23 | 9.28 | 9.28 mg/l |
| 18 Nov 2024, 11:54 | 9.14 | 9.14 mg/l |
| 18 Oct 2024, 12:50 | 7.88 | 7.88 mg/l |
| 19 Sep 2024, 09:54 | 6.28 | 6.28 mg/l |
| 27 Aug 2024, 09:18 | 6.23 | 6.23 mg/l |
| 15 Jul 2024, 10:18 | 6.94 | 6.94 mg/l |
| 21 Jun 2024, 12:59 | 7.52 | 7.52 mg/l |
| 11 Mar 2024, 11:34 | 10.3 | 10.3 mg/l |
| 7 Feb 2024, 10:37 | 10.3 | 10.3 mg/l |
| 22 Jan 2024, 12:29 | 10.5 | 10.5 mg/l |
| 28 Dec 2023, 11:05 | 9.09 | 9.09 mg/l |
| 6 Dec 2023, 10:59 | 11 | 11 mg/l |
| 1 Nov 2023, 10:19 | 8.1 | 8.1 mg/l |
| 17 Oct 2023, 09:33 | 8.19 | 8.19 mg/l |
Water temperature
code 0076 · °C
19 °C
Sampled 7 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 19 | 19 °C |
| 12 Jun 2026, 10:02 | 15.3 | 15.3 °C |
| 28 May 2026, 09:04 | 17.9 | 17.9 °C |
| 30 Apr 2026, 08:57 | 10.8 | 10.8 °C |
| 18 Mar 2026, 10:07 | 9.2 | 9.2 °C |
| 16 Feb 2026, 12:08 | 7.7 | 7.7 °C |
| 7 Jan 2026, 11:18 | 4 | 4 °C |
| 11 Dec 2025, 10:26 | 8.8 | 8.8 °C |
| 19 Nov 2025, 11:17 | 8.5 | 8.5 °C |
| 9 Oct 2025, 11:31 | 11.9 | 11.9 °C |
| 11 Sep 2025, 09:37 | 14.6 | 14.6 °C |
| 8 Aug 2025, 12:04 | 16.8 | 16.8 °C |
| 14 Jul 2025, 11:27 | 18.9 | 18.9 °C |
| 26 Jun 2025, 10:38 | 17.8 | 17.8 °C |
| 22 May 2025, 12:12 | 13.4 | 13.4 °C |
| 16 Apr 2025, 14:37 | 12.6 | 12.6 °C |
| 5 Mar 2025, 10:37 | 5.7 | 5.7 °C |
| 10 Feb 2025, 10:23 | 5.3 | 5.3 °C |
| 23 Jan 2025, 09:39 | 4.3 | 4.3 °C |
| 5 Dec 2024, 10:23 | 10.1 | 10.1 °C |
| 18 Nov 2024, 11:54 | 9.1 | 9.1 °C |
| 18 Oct 2024, 12:50 | 12.9 | 12.9 °C |
| 19 Sep 2024, 09:54 | 16 | 16 °C |
| 27 Aug 2024, 09:18 | 16.3 | 16.3 °C |
| 15 Jul 2024, 10:18 | 15 | 15 °C |
| 21 Jun 2024, 12:59 | 16.1 | 16.1 °C |
| 11 Mar 2024, 11:34 | 8.6 | 8.6 °C |
| 7 Feb 2024, 10:37 | 8.7 | 8.7 °C |
| 22 Jan 2024, 12:29 | 6.9 | 6.9 °C |
| 28 Dec 2023, 11:05 | 9.7 | 9.7 °C |
| 6 Dec 2023, 10:59 | 6.8 | 6.8 °C |
| 1 Nov 2023, 10:19 | 12.4 | 12.4 °C |
| 17 Oct 2023, 09:33 | 10 | 10 °C |
pH
code 0061
7.63
Sampled 7 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 7.63 | 7.63 |
| 12 Jun 2026, 10:02 | 7.45 | 7.45 |
| 28 May 2026, 09:04 | 7.45 | 7.45 |
| 30 Apr 2026, 08:57 | 7.63 | 7.63 |
| 18 Mar 2026, 10:07 | 7.77 | 7.77 |
| 16 Feb 2026, 12:08 | 7.57 | 7.57 |
| 7 Jan 2026, 11:18 | 7.69 | 7.69 |
| 11 Dec 2025, 10:26 | 7.65 | 7.65 |
| 19 Nov 2025, 11:17 | 7.45 | 7.45 |
| 9 Oct 2025, 11:31 | 7.38 | 7.38 |
| 11 Sep 2025, 09:37 | 7.55 | 7.55 |
| 8 Aug 2025, 12:04 | 7.57 | 7.57 |
| 14 Jul 2025, 11:27 | 7.4 | 7.4 |
| 26 Jun 2025, 10:38 | 7.46 | 7.46 |
| 22 May 2025, 12:12 | 7.53 | 7.53 |
| 16 Apr 2025, 14:37 | 7.83 | 7.83 |
| 5 Mar 2025, 10:37 | 7.83 | 7.83 |
| 10 Feb 2025, 10:23 | 7.63 | 7.63 |
| 23 Jan 2025, 09:39 | 7.72 | 7.72 |
| 5 Dec 2024, 10:23 | 7.53 | 7.53 |
| 18 Nov 2024, 11:54 | 7.7 | 7.7 |
| 18 Oct 2024, 12:50 | 7.59 | 7.59 |
| 19 Sep 2024, 09:54 | 7.25 | 7.25 |
| 27 Aug 2024, 09:18 | 7.59 | 7.59 |
| 15 Jul 2024, 10:18 | 7.72 | 7.72 |
| 21 Jun 2024, 12:59 | 7.9 | 7.9 |
| 11 Mar 2024, 11:34 | 7.9 | 7.9 |
| 7 Feb 2024, 10:37 | 7.87 | 7.87 |
| 22 Jan 2024, 12:29 | 7.68 | 7.68 |
| 28 Dec 2023, 11:05 | 7.67 | 7.67 |
| 6 Dec 2023, 10:59 | 7.57 | 7.57 |
| 1 Nov 2023, 10:19 | 7.61 | 7.61 |
| 17 Oct 2023, 09:33 | 7.7 | 7.7 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.071 mg/l
Sampled 7 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 0.071 | 0.071 mg/l |
| 12 Jun 2026, 10:02 | 0.057 | 0.057 mg/l |
| 28 May 2026, 09:04 | 0.086 | 0.086 mg/l |
| 30 Apr 2026, 08:57 | 0.033 | 0.033 mg/l |
| 18 Mar 2026, 10:07 | 0.061 | 0.061 mg/l |
| 16 Feb 2026, 12:08 | 0.07 | 0.07 mg/l |
| 7 Jan 2026, 11:18 | 0.14 | 0.14 mg/l |
| 11 Dec 2025, 10:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2025, 11:17 | 0.078 | 0.078 mg/l |
| 9 Oct 2025, 11:31 | 0.044 | 0.044 mg/l |
| 11 Sep 2025, 09:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 12:04 | 0.056 | 0.056 mg/l |
| 14 Jul 2025, 11:27 | 0.096 | 0.096 mg/l |
| 26 Jun 2025, 10:38 | 0.12 | 0.12 mg/l |
| 22 May 2025, 12:12 | 0.038 | 0.038 mg/l |
| 16 Apr 2025, 14:37 | 0.26 | 0.26 mg/l |
| 5 Mar 2025, 10:37 | 0.09 | 0.09 mg/l |
| 10 Feb 2025, 10:23 | 0.11 | 0.11 mg/l |
| 23 Jan 2025, 09:39 | 0.11 | 0.11 mg/l |
| 18 Nov 2024, 11:54 | 0.034 | 0.034 mg/l |
| 18 Oct 2024, 12:50 | 0.044 | 0.044 mg/l |
| 19 Sep 2024, 09:54 | 0.046 | 0.046 mg/l |
| 27 Aug 2024, 09:18 | 0.064 | 0.064 mg/l |
| 15 Jul 2024, 10:18 | 0.053 | 0.053 mg/l |
| 21 Jun 2024, 12:59 | 0.056 | 0.056 mg/l |
| 11 Mar 2024, 11:34 | 0.089 | 0.089 mg/l |
| 7 Feb 2024, 10:37 | 0.053 | 0.053 mg/l |
| 22 Jan 2024, 12:29 | 0.083 | 0.083 mg/l |
| 28 Dec 2023, 11:05 | 0.069 | 0.069 mg/l |
| 6 Dec 2023, 10:59 | 0.037 | 0.037 mg/l |
| 1 Nov 2023, 10:19 | 0.033 | 0.033 mg/l |
| 17 Oct 2023, 09:33 | 0.089 | 0.089 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.18 mg/l
Sampled 7 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 1.18 | 1.18 mg/l |
| 12 Jun 2026, 10:02 | 0.852 | 0.852 mg/l |
| 28 May 2026, 09:04 | 1.37 | 1.37 mg/l |
| 30 Apr 2026, 08:57 | 1.98 | 1.98 mg/l |
| 18 Mar 2026, 10:07 | 2.28 | 2.28 mg/l |
| 16 Feb 2026, 12:08 | 2.08 | 2.08 mg/l |
| 7 Jan 2026, 11:18 | 1.88 | 1.88 mg/l |
| 11 Dec 2025, 10:26 | 3.28 | 3.28 mg/l |
| 19 Nov 2025, 11:17 | 0.988 | 0.988 mg/l |
| 9 Oct 2025, 11:31 | 0.623 | 0.623 mg/l |
| 11 Sep 2025, 09:37 | 0.701 | 0.701 mg/l |
| 8 Aug 2025, 12:04 | 1.18 | 1.18 mg/l |
| 14 Jul 2025, 11:27 | 0.945 | 0.945 mg/l |
| 26 Jun 2025, 10:38 | 0.67 | 0.67 mg/l |
| 22 May 2025, 12:12 | 1.57 | 1.57 mg/l |
| 16 Apr 2025, 14:37 | 2.37 | 2.37 mg/l |
| 5 Mar 2025, 10:37 | 1.89 | 1.89 mg/l |
| 10 Feb 2025, 10:23 | 2.28 | 2.28 mg/l |
| 23 Jan 2025, 09:39 | 2.78 | 2.78 mg/l |
| 18 Nov 2024, 11:54 | 3.28 | 3.28 mg/l |
| 18 Oct 2024, 12:50 | 1.68 | 1.68 mg/l |
| 19 Sep 2024, 09:54 | 2.28 | 2.28 mg/l |
| 27 Aug 2024, 09:18 | 1.78 | 1.78 mg/l |
| 15 Jul 2024, 10:18 | 2.17 | 2.17 mg/l |
| 21 Jun 2024, 12:59 | 4.37 | 4.37 mg/l |
| 11 Mar 2024, 11:34 | 1.88 | 1.88 mg/l |
| 7 Feb 2024, 10:37 | 1.99 | 1.99 mg/l |
| 22 Jan 2024, 12:29 | 1.98 | 1.98 mg/l |
| 28 Dec 2023, 11:05 | 1.98 | 1.98 mg/l |
| 6 Dec 2023, 10:59 | 2.28 | 2.28 mg/l |
| 1 Nov 2023, 10:19 | 1.98 | 1.98 mg/l |
| 17 Oct 2023, 09:33 | 1.08 | 1.08 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.14 mg/l
Sampled 7 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 0.14 | 0.14 mg/l |
| 12 Jun 2026, 10:02 | 0.15 | 0.15 mg/l |
| 28 May 2026, 09:04 | 0.16 | 0.16 mg/l |
| 30 Apr 2026, 08:57 | 0.086 | 0.086 mg/l |
| 18 Mar 2026, 10:07 | 0.065 | 0.065 mg/l |
| 16 Feb 2026, 12:08 | 0.088 | 0.088 mg/l |
| 7 Jan 2026, 11:18 | 0.095 | 0.095 mg/l |
| 11 Dec 2025, 10:26 | 0.094 | 0.094 mg/l |
| 19 Nov 2025, 11:17 | 0.11 | 0.11 mg/l |
| 9 Oct 2025, 11:31 | 0.18 | 0.18 mg/l |
| 11 Sep 2025, 09:37 | 0.17 | 0.17 mg/l |
| 8 Aug 2025, 12:04 | 0.2 | 0.2 mg/l |
| 14 Jul 2025, 11:27 | 0.23 | 0.23 mg/l |
| 26 Jun 2025, 10:38 | 0.2 | 0.2 mg/l |
| 22 May 2025, 12:12 | 0.13 | 0.13 mg/l |
| 16 Apr 2025, 14:37 | 0.055 | 0.055 mg/l |
| 5 Mar 2025, 10:37 | 0.028 | 0.028 mg/l |
| 10 Feb 2025, 10:23 | 0.058 | 0.058 mg/l |
| 23 Jan 2025, 09:39 | 0.069 | 0.069 mg/l |
| 18 Nov 2024, 11:54 | 0.12 | 0.12 mg/l |
| 18 Oct 2024, 12:50 | 0.099 | 0.099 mg/l |
| 19 Sep 2024, 09:54 | 0.08 | 0.08 mg/l |
| 27 Aug 2024, 09:18 | 0.11 | 0.11 mg/l |
| 15 Jul 2024, 10:18 | 0.11 | 0.11 mg/l |
| 21 Jun 2024, 12:59 | 0.064 | 0.064 mg/l |
| 11 Mar 2024, 11:34 | 0.017 | 0.017 mg/l |
| 7 Feb 2024, 10:37 | 0.056 | 0.056 mg/l |
| 22 Jan 2024, 12:29 | 0.068 | 0.068 mg/l |
| 28 Dec 2023, 11:05 | 0.085 | 0.085 mg/l |
| 6 Dec 2023, 10:59 | 0.1 | 0.1 mg/l |
| 1 Nov 2023, 10:19 | 0.066 | 0.066 mg/l |
| 17 Oct 2023, 09:33 | 0.09 | 0.09 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
565 µS/cm
Sampled 7 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:44 | 565 | 565 µS/cm |
| 12 Jun 2026, 10:02 | 396 | 396 µS/cm |
| 28 May 2026, 09:04 | 514 | 514 µS/cm |
| 30 Apr 2026, 08:57 | 552 | 552 µS/cm |
| 18 Mar 2026, 10:07 | 543 | 543 µS/cm |
| 16 Feb 2026, 12:08 | 468 | 468 µS/cm |
| 7 Jan 2026, 11:18 | 571 | 571 µS/cm |
| 11 Dec 2025, 10:26 | 536 | 536 µS/cm |
| 19 Nov 2025, 11:17 | 388 | 388 µS/cm |
| 9 Oct 2025, 11:31 | 444 | 444 µS/cm |
| 11 Sep 2025, 09:37 | 402 | 402 µS/cm |
| 8 Aug 2025, 12:04 | 471 | 471 µS/cm |
| 14 Jul 2025, 11:27 | 521 | 521 µS/cm |
| 26 Jun 2025, 10:38 | 512 | 512 µS/cm |
| 22 May 2025, 12:12 | 474 | 474 µS/cm |
| 16 Apr 2025, 14:37 | 575 | 575 µS/cm |
| 5 Mar 2025, 10:37 | 562 | 562 µS/cm |
| 10 Feb 2025, 10:23 | 579 | 579 µS/cm |
| 23 Jan 2025, 09:39 | 605 | 605 µS/cm |
| 5 Dec 2024, 10:23 | 454 | 454 µS/cm |
| 18 Nov 2024, 11:54 | 519 | 519 µS/cm |
| 18 Oct 2024, 12:50 | 456 | 456 µS/cm |
| 19 Sep 2024, 09:54 | 453 | 453 µS/cm |
| 27 Aug 2024, 09:18 | 462 | 462 µS/cm |
| 15 Jul 2024, 10:18 | 490 | 490 µS/cm |
| 21 Jun 2024, 12:59 | 657 | 657 µS/cm |
| 11 Mar 2024, 11:34 | 579 | 579 µS/cm |
| 7 Feb 2024, 10:37 | 517 | 517 µS/cm |
| 22 Jan 2024, 12:29 | 704 | 704 µS/cm |
| 28 Dec 2023, 11:05 | 492 | 492 µS/cm |
| 6 Dec 2023, 10:59 | 562 | 562 µS/cm |
| 1 Nov 2023, 10:19 | 353 | 353 µS/cm |
| 17 Oct 2023, 09:33 | 455 | 455 µS/cm |
Everything measured here
60 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 60 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Jul 2026 | 56.4% 7 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Jul 2026 | 5.22 mg/l 7 Jul 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Jul 2026 | 19 °C 7 Jul 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Jul 2026 | 7.63 7 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Jul 2026 | 0.071 mg/l 7 Jul 2026 |
| Nitrate as N 0117 | River water | 32 | Oct 2023 – Jul 2026 | 1.18 mg/l 7 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Oct 2023 – Jul 2026 | 0.14 mg/l 7 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Jul 2026 | 565 µS/cm 7 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jan 2024 – Jan 2025 | below 0.004 µg/l 23 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jan 2025 – Jan 2025 | below 0.005 µg/l 23 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 32 | Oct 2023 – Jul 2026 | 170 mg/l 7 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Oct 2023 – Jul 2026 | 0.00108 mg/l 7 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 29 | Oct 2023 – May 2026 | 2.7 mg/l 28 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| Nitrite as N 0118 | River water | 32 | Oct 2023 – Jul 2026 | 0.023 mg/l 7 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 32 | Oct 2023 – Jul 2026 | 1.2 mg/l 7 Jul 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jan 2024 – Jan 2025 | 0.0041 µg/l 23 Jan 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jan 2024 – Jan 2025 | 0.0033 µg/l 23 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jan 2024 – Jan 2025 | 0.00061 µg/l 23 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jan 2024 – Jan 2025 | below 0.005 µg/l 23 Jan 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jan 2024 – Jan 2025 | 0.0011 µg/l 23 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jan 2024 – Jan 2025 | 0.00073 µg/l 23 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jan 2024 – Jan 2025 | 0.0025 µg/l 23 Jan 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jan 2024 – Jan 2025 | 0.0022 µg/l 23 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jan 2024 – Jan 2025 | below 0.001 µg/l 23 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jan 2024 – Jan 2025 | 0.0021 µg/l 23 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jan 2024 – Jan 2025 | 0.0017 µg/l 23 Jan 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jan 2024 – Jan 2025 | 0.0026 µg/l 23 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jan 2024 – Jan 2025 | below 0.0005 µg/l 23 Jan 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jan 2024 – Jan 2025 | 0.002 µg/l 23 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jan 2024 – Jan 2025 | below 0.006 µg/l 23 Jan 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jan 2024 – Jan 2025 | below 0.005 µg/l 23 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jan 2024 – Jan 2025 | below 0.004 µg/l 23 Jan 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jan 2024 – Jan 2025 | below 0.002 µg/l 23 Jan 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.