Great Brook at Chimney Lane, Aston
EA name: GREAT BROOK AT CHIMNEY LANE, ASTON
Environment Agency sampling point TH-PUTR0051 · 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
- 24 Aug 2026, 10:0538 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 12 since 30 Apr 2025 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 435100, 201800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Great Brook
- River, by the map
- Great BrookPlaced on the river its name gives, 90 m from the line.
- Next gauge downstream
- Northmoor Lock On the River Thames · 9.5 km along the river
- Nearest gauge upstream
- Bampton On the Shill Brook · 4.5 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.3%
Sampled 24 Aug 2026, 38 days ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 80.3 | 80.3% |
| 30 Jul 2026, 10:50 | 78.6 | 78.6% |
| 15 Jun 2026, 10:35 | 88.2 | 88.2% |
| 29 May 2026, 10:40 | 75.2 | 75.2% |
| 13 Apr 2026, 10:04 | 92.3 | 92.3% |
| 27 Mar 2026, 12:42 | 104 | 104% |
| 19 Feb 2026, 11:14 | 89.3 | 89.3% |
| 6 Jan 2026, 13:28 | 92.6 | 92.6% |
| 1 Dec 2025, 10:00 | 87 | 87% |
| 12 Nov 2025, 13:03 | 75.5 | 75.5% |
| 21 Oct 2025, 10:01 | 75.8 | 75.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.69 mg/l
Sampled 24 Aug 2026, 38 days ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 7.69 | 7.69 mg/l |
| 30 Jul 2026, 10:50 | 6.91 | 6.91 mg/l |
| 15 Jun 2026, 10:35 | 8.68 | 8.68 mg/l |
| 29 May 2026, 10:40 | 6.9 | 6.9 mg/l |
| 13 Apr 2026, 10:04 | 10.7 | 10.7 mg/l |
| 27 Mar 2026, 12:42 | 11.9 | 11.9 mg/l |
| 19 Feb 2026, 11:14 | 11.2 | 11.2 mg/l |
| 6 Jan 2026, 13:28 | 12.3 | 12.3 mg/l |
| 1 Dec 2025, 10:00 | 10.3 | 10.3 mg/l |
| 12 Nov 2025, 13:03 | 8.01 | 8.01 mg/l |
| 21 Oct 2025, 10:01 | 8.11 | 8.11 mg/l |
Water temperature
code 0076 · °C
17.3 °C
Sampled 24 Aug 2026, 38 days ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 17.3 | 17.3 °C |
| 30 Jul 2026, 10:50 | 21.6 | 21.6 °C |
| 15 Jun 2026, 10:35 | 16 | 16 °C |
| 29 May 2026, 10:40 | 19.4 | 19.4 °C |
| 13 Apr 2026, 10:04 | 8.8 | 8.8 °C |
| 27 Mar 2026, 12:42 | 9.3 | 9.3 °C |
| 19 Feb 2026, 11:14 | 5.6 | 5.6 °C |
| 6 Jan 2026, 13:28 | 3.4 | 3.4 °C |
| 1 Dec 2025, 10:00 | 8.1 | 8.1 °C |
| 12 Nov 2025, 13:03 | 12.6 | 12.6 °C |
| 21 Oct 2025, 10:01 | 12.2 | 12.2 °C |
pH
code 0061
7.94
Sampled 24 Aug 2026, 38 days ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 7.94 | 7.94 |
| 30 Jul 2026, 10:50 | 7.85 | 7.85 |
| 15 Jun 2026, 10:35 | 7.95 | 7.95 |
| 29 May 2026, 10:40 | 7.85 | 7.85 |
| 13 Apr 2026, 10:04 | 8.11 | 8.11 |
| 27 Mar 2026, 12:42 | 8.23 | 8.23 |
| 19 Feb 2026, 11:14 | 8.2 | 8.2 |
| 6 Jan 2026, 13:28 | 8.1 | 8.1 |
| 1 Dec 2025, 10:00 | 8.03 | 8.03 |
| 12 Nov 2025, 13:03 | 7.81 | 7.81 |
| 21 Oct 2025, 10:01 | 7.93 | 7.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 24 Aug 2026, 38 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2026, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jun 2026, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2026, 10:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2026, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2026, 11:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 13:28 | 0.073 | 0.073 mg/l |
| 1 Dec 2025, 10:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 13:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2025, 10:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Apr 2025, 09:36 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.99 mg/l
Sampled 24 Aug 2026, 38 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 9.99 | 9.99 mg/l |
| 30 Jul 2026, 10:50 | 8.28 | 8.28 mg/l |
| 15 Jun 2026, 10:35 | 7.18 | 7.18 mg/l |
| 29 May 2026, 10:40 | 7.36 | 7.36 mg/l |
| 13 Apr 2026, 10:04 | 7.39 | 7.39 mg/l |
| 27 Mar 2026, 12:42 | 7.29 | 7.29 mg/l |
| 19 Feb 2026, 11:14 | 4.89 | 4.89 mg/l |
| 6 Jan 2026, 13:28 | 7.68 | 7.68 mg/l |
| 1 Dec 2025, 10:00 | 7.88 | 7.88 mg/l |
| 12 Nov 2025, 13:03 | 9.18 | 9.18 mg/l |
| 21 Oct 2025, 10:01 | 9.28 | 9.28 mg/l |
| 30 Apr 2025, 09:36 | 7.39 | 7.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.35 mg/l
Sampled 24 Aug 2026, 38 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 0.35 | 0.35 mg/l |
| 30 Jul 2026, 10:50 | 0.23 | 0.23 mg/l |
| 15 Jun 2026, 10:35 | 0.26 | 0.26 mg/l |
| 29 May 2026, 10:40 | 0.26 | 0.26 mg/l |
| 13 Apr 2026, 10:04 | 0.075 | 0.075 mg/l |
| 27 Mar 2026, 12:42 | 0.044 | 0.044 mg/l |
| 19 Feb 2026, 11:14 | 0.019 | 0.019 mg/l |
| 6 Jan 2026, 13:28 | 0.064 | 0.064 mg/l |
| 1 Dec 2025, 10:00 | 0.084 | 0.084 mg/l |
| 12 Nov 2025, 13:03 | 0.24 | 0.24 mg/l |
| 21 Oct 2025, 10:01 | 0.4 | 0.4 mg/l |
| 30 Apr 2025, 09:36 | 0.14 | 0.14 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
802 µS/cm
Sampled 24 Aug 2026, 38 days ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 10:05 | 802 | 802 µS/cm |
| 30 Jul 2026, 10:50 | 770 | 770 µS/cm |
| 15 Jun 2026, 10:35 | 661 | 661 µS/cm |
| 29 May 2026, 10:40 | 669 | 669 µS/cm |
| 13 Apr 2026, 10:04 | 643 | 643 µS/cm |
| 27 Mar 2026, 12:42 | 649 | 649 µS/cm |
| 19 Feb 2026, 11:14 | 556 | 556 µS/cm |
| 6 Jan 2026, 13:28 | 675 | 675 µS/cm |
| 1 Dec 2025, 10:00 | 679 | 679 µS/cm |
| 12 Nov 2025, 13:03 | 702 | 702 µS/cm |
| 21 Oct 2025, 10:01 | 772 | 772 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 11 | Oct 2025 – Aug 2026 | 80.3% 24 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 11 | Oct 2025 – Aug 2026 | 7.69 mg/l 24 Aug 2026 |
| Temperature of Water 0076 | River water | 11 | Oct 2025 – Aug 2026 | 17.3 °C 24 Aug 2026 |
| pH 0061 | River water | 11 | Oct 2025 – Aug 2026 | 7.94 24 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Apr 2025 – Aug 2026 | below 0.03 mg/l 24 Aug 2026 |
| Nitrate as N 0117 | River water | 12 | Apr 2025 – Aug 2026 | 9.99 mg/l 24 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Apr 2025 – Aug 2026 | 0.35 mg/l 24 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 11 | Oct 2025 – Aug 2026 | 802 µS/cm 24 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Apr 2025 – Aug 2026 | 210 mg/l 24 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 11 | Oct 2025 – Aug 2026 | below 0.00081 mg/l 24 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 7 | Apr 2025 – Mar 2026 | 1.4 mg/l 27 Mar 2026 |
| Nitrite as N 0118 | River water | 12 | Apr 2025 – Aug 2026 | 0.0097 mg/l 24 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Apr 2025 – Aug 2026 | 10 mg/l 24 Aug 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.