Old River Brett A1141 Road Bridge Chelsworth
EA name: OLD R.BRETT A1141 RD.BR.CHELSWORTH
Environment Agency sampling point AN-BT0300 · 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
- 10 Sep 2026, 10:0221 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 19 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 (national agency policy)
- Where
- National Grid 597658, 248006As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedTwo watercourses within reach (3 m and 56 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (16 samples)
Planned investigation (national agency policy) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
49.9%
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 49.9 | 49.9% |
| 11 Aug 2026, 10:45 | 50.9 | 50.9% |
| 15 Jul 2026, 13:28 | 74 | 74% |
| 29 Jun 2026, 09:53 | 61.5 | 61.5% |
| 9 Jun 2026, 09:20 | 73.8 | 73.8% |
| 30 Apr 2026, 10:22 | 86.5 | 86.5% |
| 28 Mar 2025, 08:00 | 88.2 | 88.2% |
| 27 Feb 2025, 10:37 | 100.4 | 100.4% |
| 28 Jan 2025, 10:34 | 99 | 99% |
| 19 Dec 2024, 11:14 | 93.4 | 93.4% |
| 5 Nov 2024, 12:36 | 80.4 | 80.4% |
| 3 Oct 2024, 12:24 | 96.2 | 96.2% |
| 9 Sep 2024, 08:47 | 74.2 | 74.2% |
| 5 Aug 2024, 11:16 | 85 | 85% |
| 2 Jul 2024, 08:33 | 81.7 | 81.7% |
| 20 Jun 2024, 10:31 | 90.8 | 90.8% |
| 5 Mar 2024, 12:44 | 98.5 | 98.5% |
| 2 Feb 2024, 11:42 | 96.8 | 96.8% |
| 4 Jan 2024, 11:22 | 94.3 | 94.3% |
| 7 Dec 2023, 12:27 | 96.3 | 96.3% |
| 6 Nov 2023, 13:55 | 95.7 | 95.7% |
| 19 Oct 2023, 13:06 | 92.4 | 92.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.07 mg/l
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 5.07 | 5.07 mg/l |
| 11 Aug 2026, 10:45 | 4.99 | 4.99 mg/l |
| 15 Jul 2026, 13:28 | 6.67 | 6.67 mg/l |
| 29 Jun 2026, 09:53 | 5.84 | 5.84 mg/l |
| 9 Jun 2026, 09:20 | 7.55 | 7.55 mg/l |
| 30 Apr 2026, 10:22 | 9.45 | 9.45 mg/l |
| 28 Mar 2025, 08:00 | 10.2 | 10.2 mg/l |
| 27 Feb 2025, 10:37 | 12.6 | 12.6 mg/l |
| 28 Jan 2025, 10:34 | 12.2 | 12.2 mg/l |
| 19 Dec 2024, 11:14 | 11 | 11 mg/l |
| 5 Nov 2024, 12:36 | 8.81 | 8.81 mg/l |
| 3 Oct 2024, 12:24 | 10.3 | 10.3 mg/l |
| 9 Sep 2024, 08:47 | 7.38 | 7.38 mg/l |
| 5 Aug 2024, 11:16 | 8.19 | 8.19 mg/l |
| 2 Jul 2024, 08:33 | 8.44 | 8.44 mg/l |
| 20 Jun 2024, 10:31 | 9.48 | 9.48 mg/l |
| 5 Mar 2024, 12:44 | 11.7 | 11.7 mg/l |
| 2 Feb 2024, 11:42 | 11.7 | 11.7 mg/l |
| 4 Jan 2024, 11:22 | 11.2 | 11.2 mg/l |
| 7 Dec 2023, 12:27 | 12 | 12 mg/l |
| 6 Nov 2023, 13:55 | 10.7 | 10.7 mg/l |
| 19 Oct 2023, 13:06 | 9.5 | 9.5 mg/l |
Water temperature
code 0076 · °C
14.5 °C
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 14.5 | 14.5 °C |
| 11 Aug 2026, 10:45 | 16.2 | 16.2 °C |
| 15 Jul 2026, 13:28 | 20.3 | 20.3 °C |
| 29 Jun 2026, 09:53 | 17.7 | 17.7 °C |
| 9 Jun 2026, 09:20 | 14.2 | 14.2 °C |
| 30 Apr 2026, 10:22 | 11.3 | 11.3 °C |
| 28 Mar 2025, 08:00 | 8.9 | 8.9 °C |
| 27 Feb 2025, 10:37 | 5.7 | 5.7 °C |
| 28 Jan 2025, 10:34 | 6.4 | 6.4 °C |
| 19 Dec 2024, 11:14 | 8 | 8 °C |
| 5 Nov 2024, 12:36 | 11.2 | 11.2 °C |
| 3 Oct 2024, 12:24 | 12.4 | 12.4 °C |
| 9 Sep 2024, 08:47 | 15.5 | 15.5 °C |
| 5 Aug 2024, 11:16 | 17 | 17 °C |
| 2 Jul 2024, 08:33 | 13.8 | 13.8 °C |
| 20 Jun 2024, 10:31 | 13.3 | 13.3 °C |
| 5 Mar 2024, 12:44 | 7.7 | 7.7 °C |
| 2 Feb 2024, 11:42 | 7 | 7 °C |
| 4 Jan 2024, 11:22 | 7.9 | 7.9 °C |
| 7 Dec 2023, 12:27 | 5.9 | 5.9 °C |
| 6 Nov 2023, 13:55 | 10.4 | 10.4 °C |
| 19 Oct 2023, 13:06 | 14 | 14 °C |
pH
code 0061
7.79
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 7.79 | 7.79 |
| 11 Aug 2026, 10:45 | 7.75 | 7.75 |
| 15 Jul 2026, 13:28 | 7.93 | 7.93 |
| 29 Jun 2026, 09:53 | 8.06 | 8.06 |
| 9 Jun 2026, 09:20 | 7.92 | 7.92 |
| 30 Apr 2026, 10:22 | 7.85 | 7.85 |
| 28 Mar 2025, 08:00 | 8.07 | 8.07 |
| 27 Feb 2025, 10:37 | 8.29 | 8.29 |
| 28 Jan 2025, 10:34 | 8.19 | 8.19 |
| 19 Dec 2024, 11:14 | 8.2 | 8.2 |
| 5 Nov 2024, 12:36 | 7.85 | 7.85 |
| 3 Oct 2024, 12:24 | 8.06 | 8.06 |
| 9 Sep 2024, 08:47 | 7.84 | 7.84 |
| 5 Aug 2024, 11:16 | 8.22 | 8.22 |
| 2 Jul 2024, 08:33 | 8.05 | 8.05 |
| 20 Jun 2024, 10:31 | 8.01 | 8.01 |
| 5 Mar 2024, 12:44 | 8.24 | 8.24 |
| 2 Feb 2024, 11:42 | 8.13 | 8.13 |
| 4 Jan 2024, 11:22 | 8.09 | 8.09 |
| 7 Dec 2023, 12:27 | 8.07 | 8.07 |
| 6 Nov 2023, 13:55 | 8.12 | 8.12 |
| 19 Oct 2023, 13:06 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.041 mg/l
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 0.041 | 0.041 mg/l |
| 11 Aug 2026, 10:45 | 0.042 | 0.042 mg/l |
| 15 Jul 2026, 13:28 | 0.066 | 0.066 mg/l |
| 29 Jun 2026, 09:53 | 0.078 | 0.078 mg/l |
| 9 Jun 2026, 09:20 | 0.066 | 0.066 mg/l |
| 30 Apr 2026, 10:22 | 0.031 | 0.031 mg/l |
| 28 Mar 2025, 08:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Feb 2025, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2025, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Dec 2024, 11:14 | 0.05 | 0.05 mg/l |
| 5 Nov 2024, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2024, 12:24 | 0.033 | 0.033 mg/l |
| 9 Sep 2024, 08:47 | 0.051 | 0.051 mg/l |
| 5 Aug 2024, 11:16 | 0.046 | 0.046 mg/l |
| 2 Jul 2024, 08:33 | 0.059 | 0.059 mg/l |
| 20 Jun 2024, 10:31 | 0.065 | 0.065 mg/l |
| 5 Mar 2024, 12:44 | 0.046 | 0.046 mg/l |
| 2 Feb 2024, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jan 2024, 11:22 | 0.041 | 0.041 mg/l |
| 7 Dec 2023, 12:27 | 0.045 | 0.045 mg/l |
| 6 Nov 2023, 13:55 | 0.036 | 0.036 mg/l |
| 19 Oct 2023, 13:06 | 0.033 | 0.033 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.35 mg/l
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 5.35 | 5.35 mg/l |
| 11 Aug 2026, 10:45 | 6.83 | 6.83 mg/l |
| 15 Jul 2026, 13:28 | 6.63 | 6.63 mg/l |
| 29 Jun 2026, 09:53 | 6.03 | 6.03 mg/l |
| 9 Jun 2026, 09:20 | 3.93 | 3.93 mg/l |
| 30 Apr 2026, 10:22 | 4.46 | 4.46 mg/l |
| 28 Mar 2025, 08:00 | 6.07 | 6.07 mg/l |
| 27 Feb 2025, 10:37 | 11 | 11 mg/l |
| 28 Jan 2025, 10:34 | 12 | 12 mg/l |
| 19 Dec 2024, 11:14 | 7.68 | 7.68 mg/l |
| 5 Nov 2024, 12:36 | 2.79 | 2.79 mg/l |
| 3 Oct 2024, 12:24 | 13 | 13 mg/l |
| 9 Sep 2024, 08:47 | 4.73 | 4.73 mg/l |
| 5 Aug 2024, 11:16 | 4.47 | 4.47 mg/l |
| 2 Jul 2024, 08:33 | 4.46 | 4.46 mg/l |
| 20 Jun 2024, 10:31 | 5.06 | 5.06 mg/l |
| 5 Mar 2024, 12:44 | 6.58 | 6.58 mg/l |
| 2 Feb 2024, 11:42 | 7.38 | 7.38 mg/l |
| 4 Jan 2024, 11:22 | 7.39 | 7.39 mg/l |
| 7 Dec 2023, 12:27 | 8.88 | 8.88 mg/l |
| 6 Nov 2023, 13:55 | 8.78 | 8.78 mg/l |
| 19 Oct 2023, 13:06 | 12 | 12 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.33 mg/l
Sampled 10 Sep 2026, 21 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 0.33 | 0.33 mg/l |
| 15 Jul 2026, 13:28 | 0.47 | 0.47 mg/l |
| 29 Jun 2026, 09:53 | 0.42 | 0.42 mg/l |
| 9 Jun 2026, 09:20 | 0.25 | 0.25 mg/l |
| 30 Apr 2026, 10:22 | 0.13 | 0.13 mg/l |
| 28 Mar 2025, 08:00 | 0.13 | 0.13 mg/l |
| 27 Feb 2025, 10:37 | 0.051 | 0.051 mg/l |
| 28 Jan 2025, 10:34 | 0.055 | 0.055 mg/l |
| 19 Dec 2024, 11:14 | 0.11 | 0.11 mg/l |
| 5 Nov 2024, 12:36 | 0.2 | 0.2 mg/l |
| 3 Oct 2024, 12:24 | 0.088 | 0.088 mg/l |
| 9 Sep 2024, 08:47 | 0.29 | 0.29 mg/l |
| 5 Aug 2024, 11:16 | 0.22 | 0.22 mg/l |
| 2 Jul 2024, 08:33 | 0.18 | 0.18 mg/l |
| 20 Jun 2024, 10:31 | 0.15 | 0.15 mg/l |
| 5 Mar 2024, 12:44 | 0.067 | 0.067 mg/l |
| 2 Feb 2024, 11:42 | 0.096 | 0.096 mg/l |
| 4 Jan 2024, 11:22 | 0.064 | 0.064 mg/l |
| 7 Dec 2023, 12:27 | 0.059 | 0.059 mg/l |
| 6 Nov 2023, 13:55 | 0.058 | 0.058 mg/l |
| 19 Oct 2023, 13:06 | 0.091 | 0.091 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
937 µS/cm
Sampled 10 Sep 2026, 21 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 10:02 | 937 | 937 µS/cm |
| 11 Aug 2026, 10:45 | 992 | 992 µS/cm |
| 15 Jul 2026, 13:28 | 969 | 969 µS/cm |
| 29 Jun 2026, 09:53 | 1071 | 1071 µS/cm |
| 9 Jun 2026, 09:20 | 914 | 914 µS/cm |
| 30 Apr 2026, 10:22 | 852 | 852 µS/cm |
| 28 Mar 2025, 08:00 | 819 | 819 µS/cm |
| 27 Feb 2025, 10:37 | 765 | 765 µS/cm |
| 28 Jan 2025, 10:34 | 712 | 712 µS/cm |
| 19 Dec 2024, 11:14 | 905 | 905 µS/cm |
| 5 Nov 2024, 12:36 | 901 | 901 µS/cm |
| 3 Oct 2024, 12:24 | 729 | 729 µS/cm |
| 9 Sep 2024, 08:47 | 929 | 929 µS/cm |
| 5 Aug 2024, 11:16 | 899 | 899 µS/cm |
| 2 Jul 2024, 08:33 | 888 | 888 µS/cm |
| 20 Jun 2024, 10:31 | 864 | 864 µS/cm |
| 5 Mar 2024, 12:44 | 766 | 766 µS/cm |
| 2 Feb 2024, 11:42 | 843 | 843 µS/cm |
| 4 Jan 2024, 11:22 | 698 | 698 µS/cm |
| 7 Dec 2023, 12:27 | 792 | 792 µS/cm |
| 6 Nov 2023, 13:55 | 754 | 754 µS/cm |
| 19 Oct 2023, 13:06 | 681 | 681 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 | 22 | Oct 2023 – Sep 2026 | 49.9% 10 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – Sep 2026 | 5.07 mg/l 10 Sep 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Sep 2026 | 14.5 °C 10 Sep 2026 |
| pH 0061 | River water | 22 | Oct 2023 – Sep 2026 | 7.79 10 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Sep 2026 | 0.041 mg/l 10 Sep 2026 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – Sep 2026 | 5.35 mg/l 10 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Sep 2026 | 0.33 mg/l 10 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Sep 2026 | 937 µS/cm 10 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Sep 2026 | 300 mg/l 10 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Sep 2026 | 0.00065 mg/l 10 Sep 2026 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – Sep 2026 | 0.053 mg/l 10 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – Sep 2026 | 5.4 mg/l 10 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.