River Yare Trowse Mill
EA name: R.YARE TROWSE MILL
Environment Agency sampling point AN-YAR180 · 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
- 3 Sep 2026, 10:2028 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 23 since 5 Jun 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)
- Where
- National Grid 624300, 306800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Yare
- River, by the map
- River YarePlaced on the river its name gives, 13 m from the line.
- Next gauge downstream
- Brundall On the River Yare · 14 km along the river
- Nearest gauge upstream
- Shotesham On the River Tas · 9.9 km along the riverColney On the River Yare · 12 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
46.6%
Sampled 3 Sep 2026, 28 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 10:20 | 46.6 | 46.6% |
| 14 Aug 2026, 07:27 | 55.6 | 55.6% |
| 23 Jul 2026, 08:15 | 81.5 | 81.5% |
| 25 Jun 2026, 09:09 | 70.2 | 70.2% |
| 15 May 2026, 14:50 | 110.4 | 110.4% |
| 13 Apr 2026, 15:20 | 119.8 | 119.8% |
| 6 Mar 2026, 12:15 | 97.5 | 97.5% |
| 2 Feb 2026, 10:52 | 95.1 | 95.1% |
| 8 Jan 2026, 09:52 | 97.1 | 97.1% |
| 5 Dec 2025, 12:20 | 96.5 | 96.5% |
| 7 Nov 2025, 12:12 | 74.7 | 74.7% |
| 13 Oct 2025, 12:38 | 79.2 | 79.2% |
| 3 Apr 2025, 11:36 | 99.3 | 99.3% |
| 6 Mar 2025, 13:01 | 104.5 | 104.5% |
| 7 Feb 2025, 11:56 | 98.9 | 98.9% |
| 14 Jan 2025, 13:30 | 97.4 | 97.4% |
| 2 Dec 2024, 09:35 | 88.7 | 88.7% |
| 1 Nov 2024, 09:18 | 80.1 | 80.1% |
| 3 Oct 2024, 13:09 | 83.3 | 83.3% |
| 2 Sep 2024, 12:19 | 85.2 | 85.2% |
| 6 Aug 2024, 14:36 | 97.5 | 97.5% |
| 2 Jul 2024, 13:59 | 89.5 | 89.5% |
| 5 Jun 2024, 13:25 | 100.1 | 100.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.45 mg/l
Sampled 3 Sep 2026, 28 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 10:20 | 4.45 | 4.45 mg/l |
| 14 Aug 2026, 07:27 | 5.22 | 5.22 mg/l |
| 23 Jul 2026, 08:15 | 7.89 | 7.89 mg/l |
| 25 Jun 2026, 09:09 | 6.15 | 6.15 mg/l |
| 15 May 2026, 14:50 | 12 | 12 mg/l |
| 13 Apr 2026, 15:20 | 13 | 13 mg/l |
| 6 Mar 2026, 12:15 | 11.4 | 11.4 mg/l |
| 2 Feb 2026, 10:52 | 11.6 | 11.6 mg/l |
| 8 Jan 2026, 09:52 | 13.4 | 13.4 mg/l |
| 5 Dec 2025, 12:20 | 12.1 | 12.1 mg/l |
| 7 Nov 2025, 12:12 | 8 | 8 mg/l |
| 13 Oct 2025, 12:38 | 8.36 | 8.36 mg/l |
| 3 Apr 2025, 11:36 | 10.8 | 10.8 mg/l |
| 6 Mar 2025, 13:01 | 12.3 | 12.3 mg/l |
| 7 Feb 2025, 11:56 | 12.7 | 12.7 mg/l |
| 14 Jan 2025, 13:30 | 12.3 | 12.3 mg/l |
| 2 Dec 2024, 09:35 | 10.4 | 10.4 mg/l |
| 1 Nov 2024, 09:18 | 8.88 | 8.88 mg/l |
| 3 Oct 2024, 13:09 | 8.74 | 8.74 mg/l |
| 2 Sep 2024, 12:19 | 8.06 | 8.06 mg/l |
| 6 Aug 2024, 14:36 | 9 | 9 mg/l |
| 2 Jul 2024, 13:59 | 8.74 | 8.74 mg/l |
| 5 Jun 2024, 13:25 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
17.5 °C
Sampled 3 Sep 2026, 28 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 10:20 | 17.5 | 17.5 °C |
| 14 Aug 2026, 07:27 | 18.3 | 18.3 °C |
| 23 Jul 2026, 08:15 | 16.8 | 16.8 °C |
| 25 Jun 2026, 09:09 | 21.8 | 21.8 °C |
| 15 May 2026, 14:50 | 11.6 | 11.6 °C |
| 13 Apr 2026, 15:20 | 11.6 | 11.6 °C |
| 6 Mar 2026, 12:15 | 8.5 | 8.5 °C |
| 2 Feb 2026, 10:52 | 6.8 | 6.8 °C |
| 8 Jan 2026, 09:52 | 1.9 | 1.9 °C |
| 5 Dec 2025, 12:20 | 5.6 | 5.6 °C |
| 7 Nov 2025, 12:12 | 12.2 | 12.2 °C |
| 13 Oct 2025, 12:38 | 12.8 | 12.8 °C |
| 3 Apr 2025, 11:36 | 11.5 | 11.5 °C |
| 6 Mar 2025, 13:01 | 8.3 | 8.3 °C |
| 7 Feb 2025, 11:56 | 4.8 | 4.8 °C |
| 14 Jan 2025, 13:30 | 5.3 | 5.3 °C |
| 2 Dec 2024, 09:35 | 8.3 | 8.3 °C |
| 1 Nov 2024, 09:18 | 10.7 | 10.7 °C |
| 3 Oct 2024, 13:09 | 13.1 | 13.1 °C |
| 2 Sep 2024, 12:19 | 17.9 | 17.9 °C |
| 6 Aug 2024, 14:36 | 19.1 | 19.1 °C |
| 2 Jul 2024, 13:59 | 16.4 | 16.4 °C |
| 5 Jun 2024, 13:25 | 15.1 | 15.1 °C |
pH
code 0061
7.74
Sampled 3 Sep 2026, 28 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 10:20 | 7.74 | 7.74 |
| 14 Aug 2026, 07:27 | 7.67 | 7.67 |
| 23 Jul 2026, 08:15 | 7.96 | 7.96 |
| 25 Jun 2026, 09:09 | 8.27 | 8.27 |
| 15 May 2026, 14:50 | 8.34 | 8.34 |
| 13 Apr 2026, 15:20 | 8.25 | 8.25 |
| 6 Mar 2026, 12:15 | 8.04 | 8.04 |
| 2 Feb 2026, 10:52 | 8.01 | 8.01 |
| 8 Jan 2026, 09:52 | 8.05 | 8.05 |
| 5 Dec 2025, 12:20 | 8.14 | 8.14 |
| 7 Nov 2025, 12:12 | 7.78 | 7.78 |
| 13 Oct 2025, 12:38 | 7.99 | 7.99 |
| 3 Apr 2025, 11:36 | 8.1 | 8.1 |
| 6 Mar 2025, 13:01 | 8.17 | 8.17 |
| 7 Feb 2025, 11:56 | 7.84 | 7.84 |
| 14 Jan 2025, 13:30 | 8.28 | 8.28 |
| 2 Dec 2024, 09:35 | 7.95 | 7.95 |
| 1 Nov 2024, 09:18 | 7.92 | 7.92 |
| 3 Oct 2024, 13:09 | 7.79 | 7.79 |
| 2 Sep 2024, 12:19 | 7.82 | 7.82 |
| 6 Aug 2024, 14:36 | 7.98 | 7.98 |
| 2 Jul 2024, 13:59 | 8.25 | 8.25 |
| 5 Jun 2024, 13:25 | 8.36 | 8.36 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 6 Mar 2026, 7 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 10:52 | 0.075 | 0.075 mg/l |
| 8 Jan 2026, 09:52 | 0.2 | 0.2 mg/l |
| 5 Dec 2025, 12:20 | 0.03 | 0.03 mg/l |
| 7 Nov 2025, 12:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2025, 12:38 | 0.043 | 0.043 mg/l |
| 6 Mar 2025, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Feb 2025, 11:56 | 0.032 | 0.032 mg/l |
| 14 Jan 2025, 13:30 | 0.066 | 0.066 mg/l |
| 2 Dec 2024, 09:35 | 0.041 | 0.041 mg/l |
| 1 Nov 2024, 09:18 | 0.031 | 0.031 mg/l |
| 3 Oct 2024, 13:09 | 0.03 | 0.03 mg/l |
| 2 Sep 2024, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2024, 14:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2024, 13:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2024, 13:25 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.19 mg/l
Sampled 6 Mar 2026, 7 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:15 | 7.19 | 7.19 mg/l |
| 2 Feb 2026, 10:52 | 8.16 | 8.16 mg/l |
| 8 Jan 2026, 09:52 | 7.74 | 7.74 mg/l |
| 5 Dec 2025, 12:20 | 9.36 | 9.36 mg/l |
| 7 Nov 2025, 12:12 | 5.47 | 5.47 mg/l |
| 13 Oct 2025, 12:38 | 5.97 | 5.97 mg/l |
| 6 Mar 2025, 13:01 | 7.78 | 7.78 mg/l |
| 7 Feb 2025, 11:56 | 7.78 | 7.78 mg/l |
| 14 Jan 2025, 13:30 | 7.86 | 7.86 mg/l |
| 1 Nov 2024, 09:18 | 5.68 | 5.68 mg/l |
| 3 Oct 2024, 13:09 | 6.67 | 6.67 mg/l |
| 2 Sep 2024, 12:19 | 5.78 | 5.78 mg/l |
| 6 Aug 2024, 14:36 | 5.68 | 5.68 mg/l |
| 2 Jul 2024, 13:59 | 4.98 | 4.98 mg/l |
| 5 Jun 2024, 13:25 | 5.27 | 5.27 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.086 mg/l
Sampled 6 Mar 2026, 7 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:15 | 0.086 | 0.086 mg/l |
| 2 Feb 2026, 10:52 | 0.1 | 0.1 mg/l |
| 8 Jan 2026, 09:52 | 0.1 | 0.1 mg/l |
| 5 Dec 2025, 12:20 | 0.1 | 0.1 mg/l |
| 7 Nov 2025, 12:12 | 0.15 | 0.15 mg/l |
| 13 Oct 2025, 12:38 | 0.19 | 0.19 mg/l |
| 6 Mar 2025, 13:01 | 0.063 | 0.063 mg/l |
| 7 Feb 2025, 11:56 | 0.092 | 0.092 mg/l |
| 14 Jan 2025, 13:30 | 0.093 | 0.093 mg/l |
| 2 Dec 2024, 09:35 | 0.12 | 0.12 mg/l |
| 1 Nov 2024, 09:18 | 0.18 | 0.18 mg/l |
| 3 Oct 2024, 13:09 | 0.2 | 0.2 mg/l |
| 2 Sep 2024, 12:19 | 0.18 | 0.18 mg/l |
| 6 Aug 2024, 14:36 | 0.16 | 0.16 mg/l |
| 2 Jul 2024, 13:59 | 0.15 | 0.15 mg/l |
| 5 Jun 2024, 13:25 | 0.12 | 0.12 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
816 µS/cm
Sampled 3 Sep 2026, 28 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 10:20 | 816 | 816 µS/cm |
| 14 Aug 2026, 07:27 | 881 | 881 µS/cm |
| 23 Jul 2026, 08:15 | 973 | 973 µS/cm |
| 25 Jun 2026, 09:09 | 912 | 912 µS/cm |
| 15 May 2026, 14:50 | 845 | 845 µS/cm |
| 13 Apr 2026, 15:20 | 834 | 834 µS/cm |
| 6 Mar 2026, 12:15 | 825 | 825 µS/cm |
| 2 Feb 2026, 10:52 | 771 | 771 µS/cm |
| 8 Jan 2026, 09:52 | 1027 | 1027 µS/cm |
| 5 Dec 2025, 12:20 | 866 | 866 µS/cm |
| 7 Nov 2025, 12:12 | 892 | 892 µS/cm |
| 13 Oct 2025, 12:38 | 1005 | 1005 µS/cm |
| 3 Apr 2025, 11:36 | 809 | 809 µS/cm |
| 6 Mar 2025, 13:01 | 803 | 803 µS/cm |
| 7 Feb 2025, 11:56 | 863 | 863 µS/cm |
| 14 Jan 2025, 13:30 | 916 | 916 µS/cm |
| 2 Dec 2024, 09:35 | 856 | 856 µS/cm |
| 1 Nov 2024, 09:18 | 870 | 870 µS/cm |
| 3 Oct 2024, 13:09 | 720 | 720 µS/cm |
| 2 Sep 2024, 12:19 | 855 | 855 µS/cm |
| 6 Aug 2024, 14:36 | 850 | 850 µS/cm |
| 2 Jul 2024, 13:59 | 878 | 878 µS/cm |
| 5 Jun 2024, 13:25 | 1030 | 1030 µS/cm |
Everything measured here
21 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 21 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 23 | Jun 2024 – Sep 2026 | 46.6% 3 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – Sep 2026 | 4.45 mg/l 3 Sep 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – Sep 2026 | 17.5 °C 3 Sep 2026 |
| pH 0061 | River water | 23 | Jun 2024 – Sep 2026 | 7.74 3 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 16 | Jun 2024 – Mar 2026 | below 0.03 mg/l 6 Mar 2026 |
| Nitrate as N 0117 | River water | 15 | Jun 2024 – Mar 2026 | 7.19 mg/l 6 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Jun 2024 – Mar 2026 | 0.086 mg/l 6 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – Sep 2026 | 816 µS/cm 3 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Jun 2024 – Mar 2026 | 280 mg/l 6 Mar 2026 |
| Alkalinity, Dissolved as CaCO3 7867 | River water | 6 | Apr 2026 – Sep 2026 | 250 mg/l 3 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 16 | Jun 2024 – Mar 2026 | below 0.00049 mg/l 6 Mar 2026 |
| Ammoniacal Nitrogen, Filtered as N 9993 | River water | 6 | Apr 2026 – Sep 2026 | 0.038 mg/l 3 Sep 2026 |
| Chloride, GF/C Filtered 7190 | River water | 6 | Apr 2026 – Sep 2026 | 59 mg/l 3 Sep 2026 |
| Nitrite as N 0118 | River water | 16 | Jun 2024 – Mar 2026 | 0.015 mg/l 6 Mar 2026 |
| Nitrite, Filtered as N 6485 | River water | 6 | Apr 2026 – Sep 2026 | 0.03 mg/l 3 Sep 2026 |
| Nitrogen, Total as N 9686 | River water | 6 | Apr 2026 – Sep 2026 | 3.9 mg/l 3 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Jun 2024 – Mar 2026 | 7.2 mg/l 6 Mar 2026 |
| Nitrogen, Total Oxidised, Filtered as N 9943 | River water | 6 | Apr 2026 – Sep 2026 | 3.5 mg/l 3 Sep 2026 |
| Orthophosphate, Filtered as P 9856 | River water | 6 | Apr 2026 – Sep 2026 | 0.22 mg/l 3 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 6 | Apr 2026 – Sep 2026 | 0.22 mg/l 3 Sep 2026 |
| Silicate, Filtered as SiO2 9857 | River water | 6 | Apr 2026 – Sep 2026 | 12 mg/l 3 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.