Ayleston Brook at Cottlass Farm
EA name: AYLESTON BROOK AT COTTLASS FARM
Environment Agency sampling point SW-70920250 · 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
- 14 Mar 2025, 09:4919 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
- 17 since 23 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 264405, 51230As published, to the nearest 1 m. Open in a map
- River, by its own name
- Ayleston Brook
- River, by the map
- Ayleston BrookPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Planned investigation (local monitoring) (17 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.9%
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 98.9 | 98.9% |
| 5 Feb 2025, 13:09 | 97.3 | 97.3% |
| 8 Jan 2025, 09:54 | 99.3 | 99.3% |
| 2 Dec 2024, 09:19 | 96.1 | 96.1% |
| 8 Nov 2024, 10:04 | 95.6 | 95.6% |
| 11 Oct 2024, 10:23 | 97 | 97% |
| 10 Sep 2024, 13:58 | 92.1 | 92.1% |
| 7 Aug 2024, 16:51 | 86.8 | 86.8% |
| 12 Jul 2024, 13:44 | 94.4 | 94.4% |
| 6 Jun 2024, 12:11 | 99.2 | 99.2% |
| 27 Mar 2024, 15:09 | 96.8 | 96.8% |
| 23 Feb 2024, 11:11 | 97.3 | 97.3% |
| 14 Feb 2024, 10:52 | 94 | 94% |
| 8 Jan 2024, 12:29 | 96.9 | 96.9% |
| 6 Dec 2023, 10:06 | 98.3 | 98.3% |
| 8 Nov 2023, 10:09 | 96.1 | 96.1% |
| 23 Oct 2023, 10:12 | 95.2 | 95.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.2 mg/l
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 12.2 | 12.2 mg/l |
| 5 Feb 2025, 13:09 | 11.2 | 11.2 mg/l |
| 8 Jan 2025, 09:54 | 12 | 12 mg/l |
| 2 Dec 2024, 09:19 | 10.7 | 10.7 mg/l |
| 8 Nov 2024, 10:04 | 10.1 | 10.1 mg/l |
| 11 Oct 2024, 10:23 | 10.8 | 10.8 mg/l |
| 10 Sep 2024, 13:58 | 9.26 | 9.26 mg/l |
| 7 Aug 2024, 16:51 | 8.47 | 8.47 mg/l |
| 12 Jul 2024, 13:44 | 9.47 | 9.47 mg/l |
| 6 Jun 2024, 12:11 | 10.4 | 10.4 mg/l |
| 27 Mar 2024, 15:09 | 11 | 11 mg/l |
| 23 Feb 2024, 11:11 | 11 | 11 mg/l |
| 14 Feb 2024, 10:52 | 10.3 | 10.3 mg/l |
| 8 Jan 2024, 12:29 | 11.3 | 11.3 mg/l |
| 6 Dec 2023, 10:06 | 11.3 | 11.3 mg/l |
| 8 Nov 2023, 10:09 | 10.2 | 10.2 mg/l |
| 23 Oct 2023, 10:12 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
6.2 °C
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 6.2 | 6.2 °C |
| 5 Feb 2025, 13:09 | 9.2 | 9.2 °C |
| 8 Jan 2025, 09:54 | 7.1 | 7.1 °C |
| 2 Dec 2024, 09:19 | 10.5 | 10.5 °C |
| 8 Nov 2024, 10:04 | 12.7 | 12.7 °C |
| 11 Oct 2024, 10:23 | 10.6 | 10.6 °C |
| 10 Sep 2024, 13:58 | 15 | 15 °C |
| 7 Aug 2024, 16:51 | 16.4 | 16.4 °C |
| 12 Jul 2024, 13:44 | 15.1 | 15.1 °C |
| 6 Jun 2024, 12:11 | 13.1 | 13.1 °C |
| 27 Mar 2024, 15:09 | 9.6 | 9.6 °C |
| 23 Feb 2024, 11:11 | 9.7 | 9.7 °C |
| 14 Feb 2024, 10:52 | 11 | 11 °C |
| 8 Jan 2024, 12:29 | 8.4 | 8.4 °C |
| 6 Dec 2023, 10:06 | 9.3 | 9.3 °C |
| 8 Nov 2023, 10:09 | 12.4 | 12.4 °C |
| 23 Oct 2023, 10:12 | 12.1 | 12.1 °C |
pH
code 0061
7.84
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 7.84 | 7.84 |
| 5 Feb 2025, 13:09 | 7.65 | 7.65 |
| 8 Jan 2025, 09:54 | 7.43 | 7.43 |
| 2 Dec 2024, 09:19 | 7.59 | 7.59 |
| 8 Nov 2024, 10:04 | 7.8 | 7.8 |
| 11 Oct 2024, 10:23 | 7.54 | 7.54 |
| 10 Sep 2024, 13:58 | 7.75 | 7.75 |
| 7 Aug 2024, 16:51 | 7.74 | 7.74 |
| 12 Jul 2024, 13:44 | 7.9 | 7.9 |
| 6 Jun 2024, 12:11 | 7.95 | 7.95 |
| 27 Mar 2024, 15:09 | 7.68 | 7.68 |
| 23 Feb 2024, 11:11 | 7.52 | 7.52 |
| 14 Feb 2024, 10:52 | 7.5 | 7.5 |
| 8 Jan 2024, 12:29 | 7.72 | 7.72 |
| 6 Dec 2023, 10:06 | 7.63 | 7.63 |
| 8 Nov 2023, 10:09 | 7.56 | 7.56 |
| 23 Oct 2023, 10:12 | 7.75 | 7.75 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.069 mg/l
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 0.069 | 0.069 mg/l |
| 5 Feb 2025, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jan 2025, 09:54 | 0.038 | 0.038 mg/l |
| 2 Dec 2024, 09:19 | 0.063 | 0.063 mg/l |
| 8 Nov 2024, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Oct 2024, 10:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Sep 2024, 13:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Aug 2024, 16:51 | 0.031 | 0.031 mg/l |
| 12 Jul 2024, 13:44 | 0.032 | 0.032 mg/l |
| 6 Jun 2024, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2024, 15:09 | 0.066 | 0.066 mg/l |
| 23 Feb 2024, 11:11 | 0.07 | 0.07 mg/l |
| 14 Feb 2024, 10:52 | 0.28 | 0.28 mg/l |
| 8 Jan 2024, 12:29 | 0.041 | 0.041 mg/l |
| 6 Dec 2023, 10:06 | 0.18 | 0.18 mg/l |
| 8 Nov 2023, 10:09 | 0.13 | 0.13 mg/l |
| 23 Oct 2023, 10:12 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.28 mg/l
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 5.28 | 5.28 mg/l |
| 5 Feb 2025, 13:09 | 3.8 | 3.8 mg/l |
| 8 Jan 2025, 09:54 | 3.59 | 3.59 mg/l |
| 2 Dec 2024, 09:19 | 3.49 | 3.49 mg/l |
| 8 Nov 2024, 10:04 | 4.39 | 4.39 mg/l |
| 11 Oct 2024, 10:23 | 3.59 | 3.59 mg/l |
| 10 Sep 2024, 13:58 | 5.79 | 5.79 mg/l |
| 7 Aug 2024, 16:51 | 5.98 | 5.98 mg/l |
| 12 Jul 2024, 13:44 | 5.98 | 5.98 mg/l |
| 6 Jun 2024, 12:11 | 6.18 | 6.18 mg/l |
| 27 Mar 2024, 15:09 | 3.39 | 3.39 mg/l |
| 23 Feb 2024, 11:11 | 3.89 | 3.89 mg/l |
| 14 Feb 2024, 10:52 | 2.99 | 2.99 mg/l |
| 8 Jan 2024, 12:29 | 4.29 | 4.29 mg/l |
| 6 Dec 2023, 10:06 | 4.39 | 4.39 mg/l |
| 8 Nov 2023, 10:09 | 2.59 | 2.59 mg/l |
| 23 Oct 2023, 10:12 | 4.59 | 4.59 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.2 mg/l
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 0.2 | 0.2 mg/l |
| 5 Feb 2025, 13:09 | 0.075 | 0.075 mg/l |
| 8 Jan 2025, 09:54 | 0.072 | 0.072 mg/l |
| 2 Dec 2024, 09:19 | 0.079 | 0.079 mg/l |
| 8 Nov 2024, 10:04 | 0.18 | 0.18 mg/l |
| 11 Oct 2024, 10:23 | 0.13 | 0.13 mg/l |
| 10 Sep 2024, 13:58 | 0.53 | 0.53 mg/l |
| 7 Aug 2024, 16:51 | 0.49 | 0.49 mg/l |
| 12 Jul 2024, 13:44 | 0.37 | 0.37 mg/l |
| 6 Jun 2024, 12:11 | 0.39 | 0.39 mg/l |
| 27 Mar 2024, 15:09 | 0.072 | 0.072 mg/l |
| 23 Feb 2024, 11:11 | 0.065 | 0.065 mg/l |
| 14 Feb 2024, 10:52 | 0.12 | 0.12 mg/l |
| 8 Jan 2024, 12:29 | 0.072 | 0.072 mg/l |
| 6 Dec 2023, 10:06 | 0.096 | 0.096 mg/l |
| 8 Nov 2023, 10:09 | 0.081 | 0.081 mg/l |
| 23 Oct 2023, 10:12 | 0.17 | 0.17 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
311 µS/cm
Sampled 14 Mar 2025, 19 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Mar 2025, 09:49 | 311 | 311 µS/cm |
| 5 Feb 2025, 13:09 | 285 | 285 µS/cm |
| 8 Jan 2025, 09:54 | 280 | 280 µS/cm |
| 2 Dec 2024, 09:19 | 285 | 285 µS/cm |
| 8 Nov 2024, 10:04 | 311 | 311 µS/cm |
| 11 Oct 2024, 10:23 | 288 | 288 µS/cm |
| 10 Sep 2024, 13:58 | 363 | 363 µS/cm |
| 7 Aug 2024, 16:51 | 383 | 383 µS/cm |
| 12 Jul 2024, 13:44 | 351 | 351 µS/cm |
| 6 Jun 2024, 12:11 | 341 | 341 µS/cm |
| 27 Mar 2024, 15:09 | 262 | 262 µS/cm |
| 23 Feb 2024, 11:11 | 264 | 264 µS/cm |
| 14 Feb 2024, 10:52 | 236 | 236 µS/cm |
| 8 Jan 2024, 12:29 | 292 | 292 µS/cm |
| 6 Dec 2023, 10:06 | 283 | 283 µS/cm |
| 8 Nov 2023, 10:09 | 237 | 237 µS/cm |
| 23 Oct 2023, 10:12 | 303 | 303 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 17 | Oct 2023 – Mar 2025 | 98.9% 14 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 17 | Oct 2023 – Mar 2025 | 12.2 mg/l 14 Mar 2025 |
| Temperature of Water 0076 | River water | 17 | Oct 2023 – Mar 2025 | 6.2 °C 14 Mar 2025 |
| pH 0061 | River water | 17 | Oct 2023 – Mar 2025 | 7.84 14 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 17 | Oct 2023 – Mar 2025 | 0.069 mg/l 14 Mar 2025 |
| Nitrate as N 0117 | River water | 17 | Oct 2023 – Mar 2025 | 5.28 mg/l 14 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 17 | Oct 2023 – Mar 2025 | 0.2 mg/l 14 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 17 | Oct 2023 – Mar 2025 | 311 µS/cm 14 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 17 | Oct 2023 – Mar 2025 | 89 mg/l 14 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 17 | Oct 2023 – Mar 2025 | 0.00066 mg/l 14 Mar 2025 |
| Nitrite as N 0118 | River water | 17 | Oct 2023 – Mar 2025 | 0.021 mg/l 14 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 17 | Oct 2023 – Mar 2025 | 5.3 mg/l 14 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.