River Chet upstream of Chedgrave Mill
EA name: R.CHET U/S CHEDGRAVE MILL
Environment Agency sampling point AN-CHT010 · 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
- 6 Mar 2026, 09:407 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
- 29 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 636100, 299100As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Chet
- River, by the map
- River ChetPlaced on the river its name gives, 29 m from the line.
- Next gauge downstream
- Reedham On the River Yare · 8.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.5%
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 83.5 | 83.5% |
| 2 Feb 2026, 11:31 | 83.3 | 83.3% |
| 12 Jan 2026, 11:19 | 83.3 | 83.3% |
| 4 Dec 2025, 11:39 | 77.8 | 77.8% |
| 10 Nov 2025, 13:39 | 73.2 | 73.2% |
| 13 Oct 2025, 13:02 | 74.8 | 74.8% |
| 23 Sep 2025, 11:58 | 70.1 | 70.1% |
| 27 Aug 2025, 11:18 | 65.5 | 65.5% |
| 31 Jul 2025, 11:55 | 69.5 | 69.5% |
| 8 Jul 2025, 11:27 | 63.4 | 63.4% |
| 9 May 2025, 10:32 | 80.2 | 80.2% |
| 8 Apr 2025, 09:11 | 82.1 | 82.1% |
| 11 Mar 2025, 10:10 | 81.7 | 81.7% |
| 19 Feb 2025, 11:36 | 87 | 87% |
| 30 Jan 2025, 08:34 | 86.8 | 86.8% |
| 4 Dec 2024, 12:08 | 89.1 | 89.1% |
| 1 Nov 2024, 10:01 | 69.2 | 69.2% |
| 4 Oct 2024, 11:51 | 77.3 | 77.3% |
| 2 Sep 2024, 11:50 | 53.5 | 53.5% |
| 5 Aug 2024, 11:54 | 74 | 74% |
| 22 Jul 2024, 12:50 | 48.4 | 48.4% |
| 4 Jun 2024, 10:31 | 78.9 | 78.9% |
| 1 Mar 2024, 11:21 | 90.3 | 90.3% |
| 2 Feb 2024, 12:51 | 93.5 | 93.5% |
| 9 Jan 2024, 11:19 | 87.3 | 87.3% |
| 5 Dec 2023, 11:35 | 73.7 | 73.7% |
| 13 Nov 2023, 12:06 | 72.5 | 72.5% |
| 2 Nov 2023, 12:36 | 83.2 | 83.2% |
| 2 Oct 2023, 11:40 | 63.8 | 63.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 10 | 10 mg/l |
| 2 Feb 2026, 11:31 | 9.97 | 9.97 mg/l |
| 12 Jan 2026, 11:19 | 10.2 | 10.2 mg/l |
| 4 Dec 2025, 11:39 | 9.41 | 9.41 mg/l |
| 10 Nov 2025, 13:39 | 7.98 | 7.98 mg/l |
| 13 Oct 2025, 13:02 | 7.88 | 7.88 mg/l |
| 23 Sep 2025, 11:58 | 7.61 | 7.61 mg/l |
| 27 Aug 2025, 11:18 | 6.52 | 6.52 mg/l |
| 31 Jul 2025, 11:55 | 6.89 | 6.89 mg/l |
| 8 Jul 2025, 11:27 | 6.29 | 6.29 mg/l |
| 9 May 2025, 10:32 | 8.58 | 8.58 mg/l |
| 8 Apr 2025, 09:11 | 10.2 | 10.2 mg/l |
| 11 Mar 2025, 10:10 | 9.68 | 9.68 mg/l |
| 19 Feb 2025, 11:36 | 11.2 | 11.2 mg/l |
| 30 Jan 2025, 08:34 | 10.9 | 10.9 mg/l |
| 4 Dec 2024, 12:08 | 10.9 | 10.9 mg/l |
| 1 Nov 2024, 10:01 | 7.72 | 7.72 mg/l |
| 4 Oct 2024, 11:51 | 8.41 | 8.41 mg/l |
| 2 Sep 2024, 11:50 | 5.18 | 5.18 mg/l |
| 5 Aug 2024, 11:54 | 7.18 | 7.18 mg/l |
| 22 Jul 2024, 12:50 | 4.71 | 4.71 mg/l |
| 4 Jun 2024, 10:31 | 7.97 | 7.97 mg/l |
| 1 Mar 2024, 11:21 | 11 | 11 mg/l |
| 2 Feb 2024, 12:51 | 10.9 | 10.9 mg/l |
| 9 Jan 2024, 11:19 | 11.5 | 11.5 mg/l |
| 5 Dec 2023, 11:35 | 8.96 | 8.96 mg/l |
| 13 Nov 2023, 12:06 | 8.21 | 8.21 mg/l |
| 2 Nov 2023, 12:36 | 9.03 | 9.03 mg/l |
| 2 Oct 2023, 11:40 | 6.31 | 6.31 mg/l |
Water temperature
code 0076 · °C
7.3 °C
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 7.3 | 7.3 °C |
| 2 Feb 2026, 11:31 | 7.5 | 7.5 °C |
| 12 Jan 2026, 11:19 | 6.7 | 6.7 °C |
| 4 Dec 2025, 11:39 | 7.1 | 7.1 °C |
| 10 Nov 2025, 13:39 | 11.4 | 11.4 °C |
| 13 Oct 2025, 13:02 | 12.9 | 12.9 °C |
| 23 Sep 2025, 11:58 | 11.6 | 11.6 °C |
| 27 Aug 2025, 11:18 | 15.5 | 15.5 °C |
| 31 Jul 2025, 11:55 | 15.7 | 15.7 °C |
| 8 Jul 2025, 11:27 | 15.6 | 15.6 °C |
| 9 May 2025, 10:32 | 12.2 | 12.2 °C |
| 8 Apr 2025, 09:11 | 6 | 6 °C |
| 11 Mar 2025, 10:10 | 7.9 | 7.9 °C |
| 19 Feb 2025, 11:36 | 4.5 | 4.5 °C |
| 30 Jan 2025, 08:34 | 5.6 | 5.6 °C |
| 4 Dec 2024, 12:08 | 6.5 | 6.5 °C |
| 1 Nov 2024, 10:01 | 10.4 | 10.4 °C |
| 4 Oct 2024, 11:51 | 11.5 | 11.5 °C |
| 2 Sep 2024, 11:50 | 16.8 | 16.8 °C |
| 5 Aug 2024, 11:54 | 16.7 | 16.7 °C |
| 22 Jul 2024, 12:50 | 16.5 | 16.5 °C |
| 4 Jun 2024, 10:31 | 14.8 | 14.8 °C |
| 1 Mar 2024, 11:21 | 6.9 | 6.9 °C |
| 2 Feb 2024, 12:51 | 8.6 | 8.6 °C |
| 9 Jan 2024, 11:19 | 3.7 | 3.7 °C |
| 5 Dec 2023, 11:35 | 6.9 | 6.9 °C |
| 13 Nov 2023, 12:06 | 9.8 | 9.8 °C |
| 2 Nov 2023, 12:36 | 11.6 | 11.6 °C |
| 2 Oct 2023, 11:40 | 15.8 | 15.8 °C |
pH
code 0061
7.67
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 7.67 | 7.67 |
| 2 Feb 2026, 11:31 | 7.73 | 7.73 |
| 12 Jan 2026, 11:19 | 7.59 | 7.59 |
| 4 Dec 2025, 11:39 | 7.79 | 7.79 |
| 10 Nov 2025, 13:39 | 7.65 | 7.65 |
| 13 Oct 2025, 13:02 | 7.76 | 7.76 |
| 23 Sep 2025, 11:58 | 7.64 | 7.64 |
| 27 Aug 2025, 11:18 | 7.56 | 7.56 |
| 31 Jul 2025, 11:55 | 7.76 | 7.76 |
| 8 Jul 2025, 11:27 | 7.56 | 7.56 |
| 9 May 2025, 10:32 | 7.97 | 7.97 |
| 8 Apr 2025, 09:11 | 7.83 | 7.83 |
| 11 Mar 2025, 10:10 | 7.77 | 7.77 |
| 19 Feb 2025, 11:36 | 7.87 | 7.87 |
| 30 Jan 2025, 08:34 | 8.15 | 8.15 |
| 4 Dec 2024, 12:08 | 7.85 | 7.85 |
| 1 Nov 2024, 10:01 | 7.65 | 7.65 |
| 4 Oct 2024, 11:51 | 7.66 | 7.66 |
| 2 Sep 2024, 11:50 | 7.54 | 7.54 |
| 5 Aug 2024, 11:54 | 7.68 | 7.68 |
| 22 Jul 2024, 12:50 | 7.57 | 7.57 |
| 4 Jun 2024, 10:31 | 7.82 | 7.82 |
| 1 Mar 2024, 11:21 | 8.05 | 8.05 |
| 2 Feb 2024, 12:51 | 7.83 | 7.83 |
| 9 Jan 2024, 11:19 | 8.06 | 8.06 |
| 5 Dec 2023, 11:35 | 7.49 | 7.49 |
| 13 Nov 2023, 12:06 | 7.63 | 7.63 |
| 2 Nov 2023, 12:36 | 7.66 | 7.66 |
| 2 Oct 2023, 11:40 | 7.93 | 7.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.031 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 0.031 | 0.031 mg/l |
| 2 Feb 2026, 11:31 | 0.03 | 0.03 mg/l |
| 12 Jan 2026, 11:19 | 0.061 | 0.061 mg/l |
| 4 Dec 2025, 11:39 | 0.046 | 0.046 mg/l |
| 10 Nov 2025, 13:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2025, 13:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Sep 2025, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Aug 2025, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Jul 2025, 11:55 | 0.067 | 0.067 mg/l |
| 8 Jul 2025, 11:27 | 0.045 | 0.045 mg/l |
| 9 May 2025, 10:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 09:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2025, 10:10 | 0.06 | 0.06 mg/l |
| 19 Feb 2025, 11:36 | 0.075 | 0.075 mg/l |
| 30 Jan 2025, 08:34 | 0.045 | 0.045 mg/l |
| 4 Dec 2024, 12:08 | 0.059 | 0.059 mg/l |
| 1 Nov 2024, 10:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 11:51 | 0.032 | 0.032 mg/l |
| 2 Sep 2024, 11:50 | 0.73 | 0.73 mg/l |
| 5 Aug 2024, 11:54 | 0.032 | 0.032 mg/l |
| 22 Jul 2024, 12:50 | 0.072 | 0.072 mg/l |
| 4 Jun 2024, 10:31 | 0.051 | 0.051 mg/l |
| 1 Mar 2024, 11:21 | 0.34 | 0.34 mg/l |
| 2 Feb 2024, 12:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2024, 11:19 | 0.093 | 0.093 mg/l |
| 5 Dec 2023, 11:35 | 0.039 | 0.039 mg/l |
| 13 Nov 2023, 12:06 | 0.062 | 0.062 mg/l |
| 2 Nov 2023, 12:36 | 0.052 | 0.052 mg/l |
| 2 Oct 2023, 11:40 | 0.031 | 0.031 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.28 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 9.28 | 9.28 mg/l |
| 2 Feb 2026, 11:31 | 6.48 | 6.48 mg/l |
| 12 Jan 2026, 11:19 | 7.46 | 7.46 mg/l |
| 4 Dec 2025, 11:39 | 8.76 | 8.76 mg/l |
| 10 Nov 2025, 13:39 | 8.87 | 8.87 mg/l |
| 13 Oct 2025, 13:02 | 8.78 | 8.78 mg/l |
| 23 Sep 2025, 11:58 | 11 | 11 mg/l |
| 27 Aug 2025, 11:18 | 8.67 | 8.67 mg/l |
| 31 Jul 2025, 11:55 | 7.77 | 7.77 mg/l |
| 8 Jul 2025, 11:27 | 7.25 | 7.25 mg/l |
| 9 May 2025, 10:32 | 11 | 11 mg/l |
| 8 Apr 2025, 09:11 | 9.78 | 9.78 mg/l |
| 11 Mar 2025, 10:10 | 8.12 | 8.12 mg/l |
| 19 Feb 2025, 11:36 | 7.46 | 7.46 mg/l |
| 30 Jan 2025, 08:34 | 8.57 | 8.57 mg/l |
| 4 Dec 2024, 12:08 | 7.75 | 7.75 mg/l |
| 1 Nov 2024, 10:01 | 8.68 | 8.68 mg/l |
| 4 Oct 2024, 11:51 | 8.27 | 8.27 mg/l |
| 2 Sep 2024, 11:50 | 8.95 | 8.95 mg/l |
| 5 Aug 2024, 11:54 | 9.97 | 9.97 mg/l |
| 22 Jul 2024, 12:50 | 7.3 | 7.3 mg/l |
| 4 Jun 2024, 10:31 | 7.74 | 7.74 mg/l |
| 1 Mar 2024, 11:21 | 4.94 | 4.94 mg/l |
| 2 Feb 2024, 12:51 | 9.98 | 9.98 mg/l |
| 9 Jan 2024, 11:19 | 6.27 | 6.27 mg/l |
| 5 Dec 2023, 11:35 | 7.07 | 7.07 mg/l |
| 13 Nov 2023, 12:06 | 6.33 | 6.33 mg/l |
| 2 Nov 2023, 12:36 | 5.86 | 5.86 mg/l |
| 2 Oct 2023, 11:40 | 9.96 | 9.96 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.069 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 0.069 | 0.069 mg/l |
| 2 Feb 2026, 11:31 | 0.077 | 0.077 mg/l |
| 12 Jan 2026, 11:19 | 0.088 | 0.088 mg/l |
| 4 Dec 2025, 11:39 | 0.068 | 0.068 mg/l |
| 10 Nov 2025, 13:39 | 0.072 | 0.072 mg/l |
| 13 Oct 2025, 13:02 | 0.076 | 0.076 mg/l |
| 23 Sep 2025, 11:58 | 0.063 | 0.063 mg/l |
| 27 Aug 2025, 11:18 | 0.071 | 0.071 mg/l |
| 31 Jul 2025, 11:55 | 0.1 | 0.1 mg/l |
| 8 Jul 2025, 11:27 | 0.089 | 0.089 mg/l |
| 9 May 2025, 10:32 | 0.032 | 0.032 mg/l |
| 8 Apr 2025, 09:11 | 0.038 | 0.038 mg/l |
| 11 Mar 2025, 10:10 | 0.034 | 0.034 mg/l |
| 19 Feb 2025, 11:36 | 0.053 | 0.053 mg/l |
| 30 Jan 2025, 08:34 | 0.086 | 0.086 mg/l |
| 4 Dec 2024, 12:08 | 0.056 | 0.056 mg/l |
| 1 Nov 2024, 10:01 | 0.074 | 0.074 mg/l |
| 4 Oct 2024, 11:51 | 0.092 | 0.092 mg/l |
| 2 Sep 2024, 11:50 | 0.096 | 0.096 mg/l |
| 5 Aug 2024, 11:54 | 0.11 | 0.11 mg/l |
| 22 Jul 2024, 12:50 | 0.081 | 0.081 mg/l |
| 4 Jun 2024, 10:31 | 0.087 | 0.087 mg/l |
| 1 Mar 2024, 11:21 | 0.14 | 0.14 mg/l |
| 2 Feb 2024, 12:51 | 0.079 | 0.079 mg/l |
| 9 Jan 2024, 11:19 | 0.087 | 0.087 mg/l |
| 5 Dec 2023, 11:35 | 0.11 | 0.11 mg/l |
| 13 Nov 2023, 12:06 | 0.077 | 0.077 mg/l |
| 2 Nov 2023, 12:36 | 0.11 | 0.11 mg/l |
| 2 Oct 2023, 11:40 | 0.09 | 0.09 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
825 µS/cm
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:40 | 825 | 825 µS/cm |
| 2 Feb 2026, 11:31 | 697 | 697 µS/cm |
| 12 Jan 2026, 11:19 | 811 | 811 µS/cm |
| 4 Dec 2025, 11:39 | 910 | 910 µS/cm |
| 10 Nov 2025, 13:39 | 1046 | 1046 µS/cm |
| 13 Oct 2025, 13:02 | 1034 | 1034 µS/cm |
| 23 Sep 2025, 11:58 | 1008 | 1008 µS/cm |
| 27 Aug 2025, 11:18 | 849 | 849 µS/cm |
| 31 Jul 2025, 11:55 | 983 | 983 µS/cm |
| 8 Jul 2025, 11:27 | 952 | 952 µS/cm |
| 9 May 2025, 10:32 | 1033 | 1033 µS/cm |
| 8 Apr 2025, 09:11 | 865 | 865 µS/cm |
| 11 Mar 2025, 10:10 | 960 | 960 µS/cm |
| 19 Feb 2025, 11:36 | 932 | 932 µS/cm |
| 30 Jan 2025, 08:34 | 824 | 824 µS/cm |
| 4 Dec 2024, 12:08 | 904 | 904 µS/cm |
| 1 Nov 2024, 10:01 | 996 | 996 µS/cm |
| 4 Oct 2024, 11:51 | 908 | 908 µS/cm |
| 2 Sep 2024, 11:50 | 1006 | 1006 µS/cm |
| 5 Aug 2024, 11:54 | 982 | 982 µS/cm |
| 22 Jul 2024, 12:50 | 979 | 979 µS/cm |
| 4 Jun 2024, 10:31 | 965 | 965 µS/cm |
| 1 Mar 2024, 11:21 | 582 | 582 µS/cm |
| 2 Feb 2024, 12:51 | 862 | 862 µS/cm |
| 9 Jan 2024, 11:19 | 860 | 860 µS/cm |
| 5 Dec 2023, 11:35 | 743 | 743 µS/cm |
| 13 Nov 2023, 12:06 | 913 | 913 µS/cm |
| 2 Nov 2023, 12:36 | 638 | 638 µS/cm |
| 2 Oct 2023, 11:40 | 1053 | 1053 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 | 29 | Oct 2023 – Mar 2026 | 83.5% 6 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Mar 2026 | 10 mg/l 6 Mar 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Mar 2026 | 7.3 °C 6 Mar 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Mar 2026 | 7.67 6 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Mar 2026 | 0.031 mg/l 6 Mar 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Mar 2026 | 9.28 mg/l 6 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Mar 2026 | 0.069 mg/l 6 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Mar 2026 | 825 µS/cm 6 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Mar 2026 | 270 mg/l 6 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Mar 2026 | 0.00022 mg/l 6 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – Mar 2026 | below 1 mg/l 6 Mar 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Mar 2026 | 0.022 mg/l 6 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Mar 2026 | 9.3 mg/l 6 Mar 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.