Ayleston Brook at Orcheton Mill
EA name: AYLESTON BROOK AT ORCHETON MILL
Environment Agency sampling point SW-70920200 · 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
- 20 Sep 2026, 11:2011 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 62 since 7 May 2024 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) · results completed 24 Sep 2026
- Where
- National Grid 263540, 49911As 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, 2 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) (56 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Results here were completed a median of 4 days after the sample was taken (2 to 184 days, 26 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
86.3%
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 86.3 | 86.3% |
| 5 Aug 2026, 15:59 | 88.7 | 88.7% |
| 3 Jul 2026, 12:30 | 93.4 | 93.4% |
| 2 Jun 2026, 11:40 | 90.7 | 90.7% |
| 13 May 2026, 09:42 | 93.8 | 93.8% |
| 16 Apr 2026, 11:37 | 102.4 | 102.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.58 mg/l
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 8.58 | 8.58 mg/l |
| 5 Aug 2026, 15:59 | 8.4 | 8.4 mg/l |
| 3 Jul 2026, 12:30 | 9.09 | 9.09 mg/l |
| 2 Jun 2026, 11:40 | 9.08 | 9.08 mg/l |
| 13 May 2026, 09:42 | 10.3 | 10.3 mg/l |
| 16 Apr 2026, 11:37 | 10.9 | 10.9 mg/l |
Water temperature
code 0076 · °C
15.5 °C
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 15.5 | 15.5 °C |
| 5 Aug 2026, 15:59 | 17.8 | 17.8 °C |
| 3 Jul 2026, 12:30 | 16.5 | 16.5 °C |
| 2 Jun 2026, 11:40 | 15.2 | 15.2 °C |
| 13 May 2026, 09:42 | 10.9 | 10.9 °C |
| 16 Apr 2026, 11:37 | 12.5 | 12.5 °C |
pH
code 0061
7.64
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 7.64 | 7.64 |
| 5 Aug 2026, 15:59 | 8 | 8 |
| 3 Jul 2026, 12:30 | 8.24 | 8.24 |
| 2 Jun 2026, 11:40 | 7.95 | 7.95 |
| 13 May 2026, 09:42 | 7.96 | 7.96 |
| 16 Apr 2026, 11:37 | 8.01 | 8.01 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.036 mg/l
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 0.036 | 0.036 mg/l |
| 5 Aug 2026, 15:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2026, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jun 2026, 11:40 | 0.053 | 0.053 mg/l |
| 13 May 2026, 09:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 11:37 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.38 mg/l
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 5.38 | 5.38 mg/l |
| 5 Aug 2026, 15:59 | 7.88 | 7.88 mg/l |
| 3 Jul 2026, 12:30 | 6.58 | 6.58 mg/l |
| 2 Jun 2026, 11:40 | 4.08 | 4.08 mg/l |
| 13 May 2026, 09:42 | 5.79 | 5.79 mg/l |
| 16 Apr 2026, 11:37 | 4.19 | 4.19 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.63 mg/l
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 0.63 | 0.63 mg/l |
| 5 Aug 2026, 15:59 | 0.86 | 0.86 mg/l |
| 3 Jul 2026, 12:30 | 0.55 | 0.55 mg/l |
| 2 Jun 2026, 11:40 | 0.49 | 0.49 mg/l |
| 13 May 2026, 09:42 | 0.33 | 0.33 mg/l |
| 16 Apr 2026, 11:37 | 0.16 | 0.16 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
387 µS/cm
Sampled 1 Sep 2026, 30 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:20 | 387 | 387 µS/cm |
| 5 Aug 2026, 15:59 | 403 | 403 µS/cm |
| 3 Jul 2026, 12:30 | 374 | 374 µS/cm |
| 2 Jun 2026, 11:40 | 326 | 326 µS/cm |
| 13 May 2026, 09:42 | 347 | 347 µS/cm |
| 16 Apr 2026, 11:37 | 314 | 314 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
800 per 100 ml
Sampled 20 Sep 2026, 11 days ago · 60 results banked
Every result (60)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Sep 2026, 11:20 | 800 | 800 per 100 ml |
| 15 Sep 2026, 10:45 | 770 | 770 per 100 ml |
| 8 Sep 2026, 12:55 | 70000 | 70000 per 100 ml |
| 1 Sep 2026, 12:20 | 29000 | 29000 per 100 ml |
| 26 Aug 2026, 13:24 | 55000 | 55000 per 100 ml |
| 18 Aug 2026, 10:50 | 13000 | 13000 per 100 ml |
| 11 Aug 2026, 12:55 | 410 | 410 per 100 ml |
| 5 Aug 2026, 15:59 | 1400 | 1400 per 100 ml |
| 27 Jul 2026, 11:50 | 500 | 500 per 100 ml |
| 21 Jul 2026, 11:38 | 1300 | 1300 per 100 ml |
| 15 Jul 2026, 12:47 | 420 | 420 per 100 ml |
| 9 Jul 2026, 12:19 | 1000 | 1000 per 100 ml |
| 6 Jul 2026, 11:12 | 1300 | 1300 per 100 ml |
| 3 Jul 2026, 12:30 | 820 | 820 per 100 ml |
| 25 Jun 2026, 12:15 | 1700 | 1700 per 100 ml |
| 17 Jun 2026, 11:39 | 730 | 730 per 100 ml |
| 8 Jun 2026, 11:10 | 4800 | 4800 per 100 ml |
| 2 Jun 2026, 11:40 | 55000 | 55000 per 100 ml |
| 30 May 2026, 12:01 | 4000 | 4000 per 100 ml |
| 20 May 2026, 11:45 | 2300 | 2300 per 100 ml |
| 14 Sep 2025, 11:38 | 840 | 840 per 100 ml |
| 10 Sep 2025, 11:39 | 30000 | 30000 per 100 ml |
| 3 Sep 2025, 12:33 | 26000 | 26000 per 100 ml |
| 28 Aug 2025, 10:34 | 29000 | 29000 per 100 ml |
| 20 Aug 2025, 12:22 | 7400 | 7400 per 100 ml |
| 14 Aug 2025, 10:34 | 3600 | 3600 per 100 ml |
| 7 Aug 2025, 14:26 | 770 | 770 per 100 ml |
| 30 Jul 2025, 11:48 | 1400 | 1400 per 100 ml |
| 24 Jul 2025, 12:03 | 2900 | 2900 per 100 ml |
| 17 Jul 2025, 11:22 | 9200 | 9200 per 100 ml |
| 10 Jul 2025, 12:34 | 630 | 630 per 100 ml |
| 3 Jul 2025, 11:35 | 1800 | 1800 per 100 ml |
| 26 Jun 2025, 11:31 | 3200 | 3200 per 100 ml |
| 19 Jun 2025, 12:52 | 1200 | 1200 per 100 ml |
| 12 Jun 2025, 12:21 | 91000 | 91000 per 100 ml |
| 5 Jun 2025, 12:04 | 3500 | 3500 per 100 ml |
| 1 Jun 2025, 11:35 | 2000 | 2000 per 100 ml |
| 28 May 2025, 11:35 | 3900 | 3900 per 100 ml |
| 21 May 2025, 11:34 | 1100 | 1100 per 100 ml |
| 1 May 2025, 11:40 | 1900 | 1900 per 100 ml |
| 24 Sep 2024, 14:18 | 41000 | 41000 per 100 ml |
| 19 Sep 2024, 12:04 | 1700 | 1700 per 100 ml |
| 12 Sep 2024, 12:26 | 910 | 910 per 100 ml |
| 2 Sep 2024, 11:55 | 5900 | 5900 per 100 ml |
| 28 Aug 2024, 11:59 | 4600 | 4600 per 100 ml |
| 21 Aug 2024, 13:47 | 2500 | 2500 per 100 ml |
| 6 Aug 2024, 14:14 | 72000 | 72000 per 100 ml |
| 3 Aug 2024, 11:00 | 3200 | 3200 per 100 ml |
| 24 Jul 2024, 12:10 | 820 | 820 per 100 ml |
| 17 Jul 2024, 11:48 | 1600 | 1600 per 100 ml |
| 8 Jul 2024, 12:50 | 710 | 710 per 100 ml |
| 6 Jul 2024, 10:49 | 43000 | 43000 per 100 ml |
| 25 Jun 2024, 13:11 | 1100 | 1100 per 100 ml |
| 20 Jun 2024, 11:49 | 1000 | 1000 per 100 ml |
| 11 Jun 2024, 12:04 | 1900 | 1900 per 100 ml |
| 5 Jun 2024, 12:46 | 810 | 810 per 100 ml |
| 29 May 2024, 14:51 | 3800 | 3800 per 100 ml |
| 23 May 2024, 17:19 | 960 | 960 per 100 ml |
| 15 May 2024, 11:28 | 1400 | 1400 per 100 ml |
| 7 May 2024, 14:35 | 500 | 500 per 100 ml |
Everything measured here
35 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 35 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 6 | Apr 2026 – Sep 2026 | 86.3% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 6 | Apr 2026 – Sep 2026 | 8.58 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 6 | Apr 2026 – Sep 2026 | 15.5 °C 1 Sep 2026 |
| pH 0061 | River water | 6 | Apr 2026 – Sep 2026 | 7.64 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 6 | Apr 2026 – Sep 2026 | 0.036 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 6 | Apr 2026 – Sep 2026 | 5.38 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 6 | Apr 2026 – Sep 2026 | 0.63 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 6 | Apr 2026 – Sep 2026 | 387 µS/cm 1 Sep 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 60 | May 2024 – Sep 2026 | 800 per 100 ml 20 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Apr 2026 – Sep 2026 | 110 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Apr 2026 – Sep 2026 | 0.00043 mg/l 1 Sep 2026 |
| Bacteroides HF183 primer 5886 | River water | 4 | Jul 2024 – Sep 2025 | Present / 100ml 10 Sep 2025 |
| Bacteroidetes Marker : All 4907 | River water | 2 | Jun 2025 – Sep 2025 | Present 10 Sep 2025 |
| Bacteroidetes Marker : Human copy number 3820 | River water | 4 | Jul 2024 – Sep 2025 | 5.7 log (10) gene copies / 100ml 10 Sep 2025 |
| Bacteroidetes Marker : Ruminant 4906 | River water | 4 | Jul 2024 – Sep 2025 | Present 10 Sep 2025 |
| Bacteroidetes Marker : Ruminant copy number 3819 | River water | 4 | Jul 2024 – Sep 2025 | 6.2 log (10) gene copies / 100ml 10 Sep 2025 |
| Bacteroidetes marker: All copy number 3818 | River water | 2 | Jun 2025 – Sep 2025 | 7.7 log (10) gene copies / 100ml 10 Sep 2025 |
| Catellicoccus Marker : Seabird 3120 | River water | 2 | Jul 2024 – Aug 2024 | Present 6 Aug 2024 |
| Catellicoccus Marker : Seabird Copy Number 3116 | River water | 2 | Jul 2024 – Aug 2024 | 3 log (10) gene copies / 100ml 6 Aug 2024 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 60 | May 2024 – Sep 2026 | 260 colony forming units / 100ml 20 Sep 2026 |
| Microbial Source Tracking 4876 | River water | 4 | Jul 2024 – Sep 2025 | 1 text result 10 Sep 2025 |
| Mitochondrial Marker : Avian 4871 | River water | 2 | Jul 2024 – Aug 2024 | Present 6 Aug 2024 |
| Mitochondrial Marker : Avian copy number 3817 | River water | 2 | Jul 2024 – Aug 2024 | 3 log (10) gene copies / 100ml 6 Aug 2024 |
| Mitochondrial Marker : Canine 4870 | River water | 4 | Jul 2024 – Sep 2025 | Not found 10 Sep 2025 |
| Mitochondrial Marker : Cattle 4755 | River water | 4 | Jul 2024 – Sep 2025 | Present 10 Sep 2025 |
| Mitochondrial Marker : Cattle copy number 3789 | River water | 4 | Jul 2024 – Sep 2025 | 4.9 log (10) gene copies / 100ml 10 Sep 2025 |
| Mitochondrial Marker : Human 4869 | River water | 4 | Jul 2024 – Sep 2025 | Present 10 Sep 2025 |
| Mitochondrial Marker : Human copy number 3812 | River water | 4 | Jul 2024 – Sep 2025 | 4.3 log (10) gene copies / 100ml 10 Sep 2025 |
| Mitochrondrial Marker: Canine copy number 3816 | River water | 4 | Jul 2024 – Sep 2025 | below 2 log (10) gene copies / 100ml 10 Sep 2025 |
| MST Filtration 4926 | River water | 60 | May 2024 – Sep 2026 | DNA Stored 20 Sep 2026 |
| Nitrite as N 0118 | River water | 6 | Apr 2026 – Sep 2026 | 0.017 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 6 | Apr 2026 – Sep 2026 | 5.4 mg/l 1 Sep 2026 |
| Preparation: DNA 5923 | River water | 4 | Jul 2024 – Sep 2025 | Done 10 Sep 2025 |
| Salinity : In Situ 7608 | River water | 59 | May 2024 – Sep 2026 | 0.19 parts per thousand 20 Sep 2026 |
| Volume of Sample Filtered 4865 | River water | 60 | May 2024 – Sep 2026 | 840 millilitre 20 Sep 2026 |
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.