Cove Brook at Mayfield Road
EA name: COVE BROOK AT MAYFIELD ROAD
Environment Agency sampling point TH-RTN0033 · 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
- 30 Jan 2026, 14:248 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 10 since 31 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 485679, 157081As published, to the nearest 1 m. Open in a map
- River, by its own name
- Cove Brook
- River, by the map
- Cove BrookPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Blackwater Bridge On the River Blackwater · 3.4 km along the riverBeside Mayfield Road: too close to say above or below.
- Nearest gauge upstream
- Cove Hazel Avenue On the Cove Brook · 2.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.5%
Sampled 30 Jan 2026, 8 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Jan 2026, 14:24 | 83.5 | 83.5% |
| 11 Dec 2025, 13:02 | 76.5 | 76.5% |
| 14 Jul 2025, 12:19 | 69 | 69% |
| 29 Apr 2025, 13:16 | 95.3 | 95.3% |
| 6 Jan 2025, 09:21 | 81 | 81% |
| 1 Oct 2024, 11:53 | 69.3 | 69.3% |
| 29 Jul 2024, 11:14 | 74.9 | 74.9% |
| 26 Apr 2024, 09:40 | 76.4 | 76.4% |
| 10 Jan 2024, 12:04 | 80.4 | 80.4% |
| 31 Oct 2023, 12:13 | 77 | 77% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.85 mg/l
Sampled 30 Jan 2026, 8 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Jan 2026, 14:24 | 9.85 | 9.85 mg/l |
| 11 Dec 2025, 13:02 | 8.72 | 8.72 mg/l |
| 14 Jul 2025, 12:19 | 6.44 | 6.44 mg/l |
| 29 Apr 2025, 13:16 | 9.61 | 9.61 mg/l |
| 6 Jan 2025, 09:21 | 9.58 | 9.58 mg/l |
| 1 Oct 2024, 11:53 | 7.3 | 7.3 mg/l |
| 29 Jul 2024, 11:14 | 7.28 | 7.28 mg/l |
| 26 Apr 2024, 09:40 | 8.69 | 8.69 mg/l |
| 10 Jan 2024, 12:04 | 10.2 | 10.2 mg/l |
| 31 Oct 2023, 12:13 | 8.38 | 8.38 mg/l |
Water temperature
code 0076 · °C
8.1 °C
Sampled 30 Jan 2026, 8 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Jan 2026, 14:24 | 8.1 | 8.1 °C |
| 11 Dec 2025, 13:02 | 9.5 | 9.5 °C |
| 14 Jul 2025, 12:19 | 18.6 | 18.6 °C |
| 29 Apr 2025, 13:16 | 14.9 | 14.9 °C |
| 6 Jan 2025, 09:21 | 8 | 8 °C |
| 1 Oct 2024, 11:53 | 12.9 | 12.9 °C |
| 29 Jul 2024, 11:14 | 16.6 | 16.6 °C |
| 26 Apr 2024, 09:40 | 9.6 | 9.6 °C |
| 10 Jan 2024, 12:04 | 5.3 | 5.3 °C |
| 31 Oct 2023, 12:13 | 11.5 | 11.5 °C |
pH
code 0061
7.06
Sampled 30 Jan 2026, 8 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Jan 2026, 14:24 | 7.06 | 7.06 |
| 11 Dec 2025, 13:02 | 7.46 | 7.46 |
| 14 Jul 2025, 12:19 | 7.27 | 7.27 |
| 29 Apr 2025, 13:16 | 7.42 | 7.42 |
| 6 Jan 2025, 09:21 | 7.12 | 7.12 |
| 1 Oct 2024, 11:53 | 6.55 | 6.55 |
| 29 Jul 2024, 11:14 | 7.35 | 7.35 |
| 26 Apr 2024, 09:40 | 7.4 | 7.4 |
| 10 Jan 2024, 12:04 | 7.25 | 7.25 |
| 31 Oct 2023, 12:13 | 7.33 | 7.33 |
Conductivity
at 25 °C · code 0077 · µS/cm
426 µS/cm
Sampled 30 Jan 2026, 8 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Jan 2026, 14:24 | 426 | 426 µS/cm |
| 11 Dec 2025, 13:02 | 383 | 383 µS/cm |
| 14 Jul 2025, 12:19 | 431 | 431 µS/cm |
| 29 Apr 2025, 13:16 | 406 | 406 µS/cm |
| 6 Jan 2025, 09:21 | 285 | 285 µS/cm |
| 1 Oct 2024, 11:53 | 338 | 338 µS/cm |
| 29 Jul 2024, 11:14 | 408 | 408 µS/cm |
| 26 Apr 2024, 09:40 | 410 | 410 µS/cm |
| 10 Jan 2024, 12:04 | 417 | 417 µS/cm |
| 31 Oct 2023, 12:13 | 378 | 378 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 | 10 | Oct 2023 – Jan 2026 | 83.5% 30 Jan 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Oct 2023 – Jan 2026 | 9.85 mg/l 30 Jan 2026 |
| Temperature of Water 0076 | River water | 10 | Oct 2023 – Jan 2026 | 8.1 °C 30 Jan 2026 |
| pH 0061 | River water | 10 | Oct 2023 – Jan 2026 | 7.06 30 Jan 2026 |
| Conductivity at 25 C 0077 | River water | 10 | Oct 2023 – Jan 2026 | 426 µS/cm 30 Jan 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jul 2025 – Dec 2025 | 0.0022 µg/l 11 Dec 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jul 2025 – Dec 2025 | below 0.004 µg/l 11 Dec 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 11 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 11 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Dec 2025 – Dec 2025 | 0.15 µg/l 11 Dec 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jul 2025 – Dec 2025 | 0.077 µg/l 11 Dec 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 11 Dec 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 11 Dec 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 11 Dec 2025 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 11 Dec 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jul 2025 – Dec 2025 | 0.0044 µg/l 11 Dec 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 11 Dec 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jul 2025 – Dec 2025 | 0.00069 µg/l 11 Dec 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jul 2025 – Dec 2025 | 0.0061 µg/l 11 Dec 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jul 2025 – Dec 2025 | 0.013 µg/l 11 Dec 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jul 2025 – Dec 2025 | 0.0017 µg/l 11 Dec 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jul 2025 – Dec 2025 | below 0.005 µg/l 11 Dec 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jul 2025 – Dec 2025 | 0.0014 µg/l 11 Dec 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jul 2025 – Dec 2025 | 0.013 µg/l 11 Dec 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jul 2025 – Dec 2025 | 0.0024 µg/l 11 Dec 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jul 2025 – Dec 2025 | 0.01 µg/l 11 Dec 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jul 2025 – Dec 2025 | 0.052 µg/l 11 Dec 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jul 2025 – Dec 2025 | 0.04 µg/l 11 Dec 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 11 Dec 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jul 2025 – Dec 2025 | 0.0015 µg/l 11 Dec 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 Dec 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jul 2025 – Jul 2025 | 0.012 µg/l 14 Jul 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jul 2025 – Dec 2025 | 0.034 µg/l 11 Dec 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Dec 2025 – Dec 2025 | 0.051 µg/l 11 Dec 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jul 2025 – Dec 2025 | 0.024 µg/l 11 Dec 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jul 2025 – Dec 2025 | 0.0042 µg/l 11 Dec 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jul 2025 – Dec 2025 | 0.054 µg/l 11 Dec 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jul 2025 – Dec 2025 | below 0.006 µg/l 11 Dec 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 11 Dec 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jul 2025 – Dec 2025 | below 0.004 µg/l 11 Dec 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 11 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.