River Ecclesbourne at Harlem Mill Wirksworth
EA name: RIVER ECCLESBOURNE,HARLEM MILL,WIRKSWRTH (also listed as “RIVER ECCLESBOURNE AT HARLEM MILL WIRKSWORTH”)
Environment Agency sampling point MD-50584150 · 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
- 19 May 2026, 10:074 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 30 Sep 2026 and had nothing newer.
- Samples banked
- 24 since 18 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 428393, 352646As published, to the nearest 1 m. Open in a map
- River, by its own name
- Ecclesbourne
- River, by the map
- River EcclesbournePlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Duffield On the River Ecclesbourne · 12 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
94.7%
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 94.7 | 94.7% |
| 9 Apr 2026, 11:53 | 99.1 | 99.1% |
| 12 Mar 2026, 09:33 | 95.8 | 95.8% |
| 12 Feb 2026, 11:34 | 96.1 | 96.1% |
| 28 Jan 2026, 08:59 | 98.9 | 98.9% |
| 11 Mar 2025, 09:55 | 98.1 | 98.1% |
| 10 Feb 2025, 11:44 | 95.7 | 95.7% |
| 27 Jan 2025, 12:03 | 98.2 | 98.2% |
| 11 Dec 2024, 11:19 | 97.7 | 97.7% |
| 22 Nov 2024, 10:43 | 93 | 93% |
| 21 Oct 2024, 11:06 | 93.6 | 93.6% |
| 24 Sep 2024, 08:41 | 94.3 | 94.3% |
| 19 Aug 2024, 11:41 | 94.8 | 94.8% |
| 19 Jul 2024, 12:00 | 95.3 | 95.3% |
| 24 Jun 2024, 10:07 | 93.1 | 93.1% |
| 22 May 2024, 11:31 | 91.5 | 91.5% |
| 15 Apr 2024, 10:54 | 97 | 97% |
| 18 Mar 2024, 12:34 | 99.2 | 99.2% |
| 20 Feb 2024, 11:25 | 97.4 | 97.4% |
| 15 Jan 2024, 12:33 | 98.2 | 98.2% |
| 18 Dec 2023, 14:04 | 96.3 | 96.3% |
| 20 Nov 2023, 12:01 | 94.7 | 94.7% |
| 18 Oct 2023, 11:39 | 93.1 | 93.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.5 mg/l
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 10.5 | 10.5 mg/l |
| 9 Apr 2026, 11:53 | 11.1 | 11.1 mg/l |
| 12 Mar 2026, 09:33 | 11.1 | 11.1 mg/l |
| 12 Feb 2026, 11:34 | 11.4 | 11.4 mg/l |
| 28 Jan 2026, 08:59 | 12.4 | 12.4 mg/l |
| 11 Mar 2025, 09:55 | 11.7 | 11.7 mg/l |
| 10 Feb 2025, 11:44 | 11.5 | 11.5 mg/l |
| 27 Jan 2025, 12:03 | 12.1 | 12.1 mg/l |
| 11 Dec 2024, 11:19 | 11.6 | 11.6 mg/l |
| 22 Nov 2024, 10:43 | 11.6 | 11.6 mg/l |
| 21 Oct 2024, 11:06 | 10.3 | 10.3 mg/l |
| 24 Sep 2024, 08:41 | 9.98 | 9.98 mg/l |
| 19 Aug 2024, 11:41 | 10.4 | 10.4 mg/l |
| 19 Jul 2024, 12:00 | 9.95 | 9.95 mg/l |
| 24 Jun 2024, 10:07 | 9.9 | 9.9 mg/l |
| 22 May 2024, 11:31 | 9.66 | 9.66 mg/l |
| 15 Apr 2024, 10:54 | 11.3 | 11.3 mg/l |
| 18 Mar 2024, 12:34 | 11.3 | 11.3 mg/l |
| 20 Feb 2024, 11:25 | 11.3 | 11.3 mg/l |
| 15 Jan 2024, 12:33 | 12 | 12 mg/l |
| 18 Dec 2023, 14:04 | 11 | 11 mg/l |
| 20 Nov 2023, 12:01 | 10.7 | 10.7 mg/l |
| 18 Oct 2023, 11:39 | 10.3 | 10.3 mg/l |
Water temperature
code 0076 · °C
10.6 °C
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 10.6 | 10.6 °C |
| 9 Apr 2026, 11:53 | 10.4 | 10.4 °C |
| 12 Mar 2026, 09:33 | 8.7 | 8.7 °C |
| 12 Feb 2026, 11:34 | 7.7 | 7.7 °C |
| 28 Jan 2026, 08:59 | 5.7 | 5.7 °C |
| 11 Mar 2025, 09:55 | 7.8 | 7.8 °C |
| 10 Feb 2025, 11:44 | 7.2 | 7.2 °C |
| 27 Jan 2025, 12:03 | 6.5 | 6.5 °C |
| 11 Dec 2024, 11:19 | 7.8 | 7.8 °C |
| 22 Nov 2024, 10:43 | 6 | 6 °C |
| 21 Oct 2024, 11:06 | 10.9 | 10.9 °C |
| 24 Sep 2024, 08:41 | 12.7 | 12.7 °C |
| 19 Aug 2024, 11:41 | 11.3 | 11.3 °C |
| 19 Jul 2024, 12:00 | 13.3 | 13.3 °C |
| 24 Jun 2024, 10:07 | 12.5 | 12.5 °C |
| 22 May 2024, 11:31 | 12.8 | 12.8 °C |
| 15 Apr 2024, 10:54 | 8.7 | 8.7 °C |
| 18 Mar 2024, 12:34 | 9.4 | 9.4 °C |
| 20 Feb 2024, 11:25 | 8.7 | 8.7 °C |
| 15 Jan 2024, 12:33 | 6.7 | 6.7 °C |
| 18 Dec 2023, 14:04 | 9.4 | 9.4 °C |
| 20 Nov 2023, 12:01 | 9.9 | 9.9 °C |
| 18 Oct 2023, 11:39 | 10.9 | 10.9 °C |
pH
code 0061
7.66
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 7.66 | 7.66 |
| 9 Apr 2026, 11:53 | 7.64 | 7.64 |
| 12 Mar 2026, 09:33 | 7.86 | 7.86 |
| 12 Feb 2026, 11:34 | 7.93 | 7.93 |
| 28 Jan 2026, 08:59 | 7.8 | 7.8 |
| 11 Mar 2025, 09:55 | 7.72 | 7.72 |
| 10 Feb 2025, 11:44 | 7.55 | 7.55 |
| 27 Jan 2025, 12:03 | 7.92 | 7.92 |
| 11 Dec 2024, 11:19 | 7.88 | 7.88 |
| 22 Nov 2024, 10:43 | 7.71 | 7.71 |
| 21 Oct 2024, 11:06 | 7.72 | 7.72 |
| 24 Sep 2024, 08:41 | 7.76 | 7.76 |
| 19 Aug 2024, 11:41 | 7.61 | 7.61 |
| 19 Jul 2024, 12:00 | 7.64 | 7.64 |
| 24 Jun 2024, 10:07 | 7.57 | 7.57 |
| 22 May 2024, 11:31 | 7.59 | 7.59 |
| 15 Apr 2024, 10:54 | 7.75 | 7.75 |
| 18 Mar 2024, 12:34 | 7.91 | 7.91 |
| 20 Feb 2024, 11:25 | 7.71 | 7.71 |
| 15 Jan 2024, 12:33 | 7.78 | 7.78 |
| 18 Dec 2023, 14:04 | 7.61 | 7.61 |
| 20 Nov 2023, 12:01 | 7.69 | 7.69 |
| 18 Oct 2023, 11:39 | 7.98 | 7.98 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.049 mg/l
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 0.049 | 0.049 mg/l |
| 9 Apr 2026, 11:53 | 0.066 | 0.066 mg/l |
| 12 Mar 2026, 09:33 | 0.049 | 0.049 mg/l |
| 12 Feb 2026, 11:34 | 0.047 | 0.047 mg/l |
| 28 Jan 2026, 08:59 | 0.03 | 0.03 mg/l |
| 11 Mar 2025, 09:55 | 0.035 | 0.035 mg/l |
| 10 Feb 2025, 11:44 | 0.17 | 0.17 mg/l |
| 27 Jan 2025, 12:03 | 0.062 | 0.062 mg/l |
| 11 Dec 2024, 11:19 | 0.053 | 0.053 mg/l |
| 22 Nov 2024, 10:43 | 0.097 | 0.097 mg/l |
| 21 Oct 2024, 11:06 | 0.042 | 0.042 mg/l |
| 24 Sep 2024, 08:41 | 0.066 | 0.066 mg/l |
| 19 Aug 2024, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jul 2024, 12:00 | 0.058 | 0.058 mg/l |
| 24 Jun 2024, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2024, 11:31 | 0.36 | 0.36 mg/l |
| 15 Apr 2024, 10:54 | 0.074 | 0.074 mg/l |
| 18 Mar 2024, 12:34 | 0.033 | 0.033 mg/l |
| 20 Feb 2024, 11:25 | 0.039 | 0.039 mg/l |
| 15 Jan 2024, 12:33 | 0.072 | 0.072 mg/l |
| 18 Dec 2023, 14:04 | 0.047 | 0.047 mg/l |
| 20 Nov 2023, 12:01 | 0.039 | 0.039 mg/l |
| 18 Oct 2023, 11:39 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.38 mg/l
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 2.38 | 2.38 mg/l |
| 9 Apr 2026, 11:53 | 3.88 | 3.88 mg/l |
| 12 Mar 2026, 09:33 | 3.99 | 3.99 mg/l |
| 12 Feb 2026, 11:34 | 3.09 | 3.09 mg/l |
| 28 Jan 2026, 08:59 | 2.9 | 2.9 mg/l |
| 11 Mar 2025, 09:55 | 3.99 | 3.99 mg/l |
| 10 Feb 2025, 11:44 | 3.68 | 3.68 mg/l |
| 27 Jan 2025, 12:03 | 2.89 | 2.89 mg/l |
| 11 Dec 2024, 11:19 | 2.89 | 2.89 mg/l |
| 22 Nov 2024, 10:43 | 2.98 | 2.98 mg/l |
| 21 Oct 2024, 11:06 | 2.19 | 2.19 mg/l |
| 24 Sep 2024, 08:41 | 2.19 | 2.19 mg/l |
| 19 Aug 2024, 11:41 | 4.19 | 4.19 mg/l |
| 19 Jul 2024, 12:00 | 3.57 | 3.57 mg/l |
| 24 Jun 2024, 10:07 | 3.99 | 3.99 mg/l |
| 22 May 2024, 11:31 | 2.27 | 2.27 mg/l |
| 15 Apr 2024, 10:54 | 2.99 | 2.99 mg/l |
| 18 Mar 2024, 12:34 | 2.89 | 2.89 mg/l |
| 20 Feb 2024, 11:25 | 3.09 | 3.09 mg/l |
| 15 Jan 2024, 12:33 | 4.39 | 4.39 mg/l |
| 18 Dec 2023, 14:04 | 3.99 | 3.99 mg/l |
| 20 Nov 2023, 12:01 | 2.59 | 2.59 mg/l |
| 18 Oct 2023, 11:39 | 2.26 | 2.26 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.025 mg/l
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 0.025 | 0.025 mg/l |
| 9 Apr 2026, 11:53 | 0.024 | 0.024 mg/l |
| 12 Mar 2026, 09:33 | 0.024 | 0.024 mg/l |
| 12 Feb 2026, 11:34 | 0.033 | 0.033 mg/l |
| 28 Jan 2026, 08:59 | 0.029 | 0.029 mg/l |
| 11 Mar 2025, 09:55 | 0.026 | 0.026 mg/l |
| 10 Feb 2025, 11:44 | 0.065 | 0.065 mg/l |
| 27 Jan 2025, 12:03 | 0.034 | 0.034 mg/l |
| 11 Dec 2024, 11:19 | 0.023 | 0.023 mg/l |
| 22 Nov 2024, 10:43 | 0.038 | 0.038 mg/l |
| 21 Oct 2024, 11:06 | 0.032 | 0.032 mg/l |
| 24 Sep 2024, 08:41 | 0.049 | 0.049 mg/l |
| 19 Aug 2024, 11:41 | 0.039 | 0.039 mg/l |
| 19 Jul 2024, 12:00 | 0.033 | 0.033 mg/l |
| 24 Jun 2024, 10:07 | 0.026 | 0.026 mg/l |
| 22 May 2024, 11:31 | 0.12 | 0.12 mg/l |
| 15 Apr 2024, 10:54 | 0.032 | 0.032 mg/l |
| 18 Mar 2024, 12:34 | 0.021 | 0.021 mg/l |
| 20 Feb 2024, 11:25 | 0.026 | 0.026 mg/l |
| 15 Jan 2024, 12:33 | 0.023 | 0.023 mg/l |
| 18 Dec 2023, 14:04 | 0.025 | 0.025 mg/l |
| 20 Nov 2023, 12:01 | 0.03 | 0.03 mg/l |
| 18 Oct 2023, 11:39 | 0.053 | 0.053 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
417 µS/cm
Sampled 19 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 May 2026, 10:07 | 417 | 417 µS/cm |
| 9 Apr 2026, 11:53 | 522 | 522 µS/cm |
| 12 Mar 2026, 09:33 | 496 | 496 µS/cm |
| 12 Feb 2026, 11:34 | 366 | 366 µS/cm |
| 28 Jan 2026, 08:59 | 358 | 358 µS/cm |
| 11 Mar 2025, 09:55 | 512 | 512 µS/cm |
| 10 Feb 2025, 11:44 | 486 | 486 µS/cm |
| 27 Jan 2025, 12:03 | 385 | 385 µS/cm |
| 11 Dec 2024, 11:19 | 391 | 391 µS/cm |
| 22 Nov 2024, 10:43 | 980 | 980 µS/cm |
| 21 Oct 2024, 11:06 | 397 | 397 µS/cm |
| 24 Sep 2024, 08:41 | 386 | 386 µS/cm |
| 19 Aug 2024, 11:41 | 541 | 541 µS/cm |
| 19 Jul 2024, 12:00 | 517 | 517 µS/cm |
| 24 Jun 2024, 10:07 | 538 | 538 µS/cm |
| 22 May 2024, 11:31 | 309 | 309 µS/cm |
| 15 Apr 2024, 10:54 | 429 | 429 µS/cm |
| 18 Mar 2024, 12:34 | 411 | 411 µS/cm |
| 20 Feb 2024, 11:25 | 423 | 423 µS/cm |
| 15 Jan 2024, 12:33 | 509 | 509 µS/cm |
| 18 Dec 2023, 14:04 | 444 | 444 µS/cm |
| 20 Nov 2023, 12:01 | 393 | 393 µS/cm |
| 18 Oct 2023, 11:39 | 403 | 403 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 | 23 | Oct 2023 – May 2026 | 94.7% 19 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Oct 2023 – May 2026 | 10.5 mg/l 19 May 2026 |
| Temperature of Water 0076 | River water | 23 | Oct 2023 – May 2026 | 10.6 °C 19 May 2026 |
| pH 0061 | River water | 23 | Oct 2023 – May 2026 | 7.66 19 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Oct 2023 – May 2026 | 0.049 mg/l 19 May 2026 |
| Nitrate as N 0117 | River water | 23 | Oct 2023 – May 2026 | 2.38 mg/l 19 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Oct 2023 – May 2026 | 0.025 mg/l 19 May 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Oct 2023 – May 2026 | 417 µS/cm 19 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 4 | Apr 2024 – Mar 2025 | below 0.004 µg/l 11 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 4 | Apr 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Oct 2023 – May 2026 | 160 mg/l 19 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Oct 2023 – May 2026 | 0.00043 mg/l 19 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 17 | Feb 2024 – May 2026 | 2.9 mg/l 19 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Nitrite as N 0118 | River water | 23 | Oct 2023 – May 2026 | 0.018 mg/l 19 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Oct 2023 – May 2026 | 2.4 mg/l 19 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 4 | Apr 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 4 | Apr 2024 – Mar 2025 | below 0.006 µg/l 11 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 3 | Jul 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 4 | Apr 2024 – Mar 2025 | below 0.004 µg/l 11 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 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.