M downstream of Wantage sewage treatment works
EA name: M DS WANTAGE STW (also listed as “RSN1690 350M DS WANTAGE STW”)
Environment Agency sampling point TH-RSN1690 · 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, 12:2345 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 7 since 27 Jan 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 440915, 191969As 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
- Letcombe BrookPlaced by position alone (the only river line close by), 5 m from the line.
- Next gauge downstream
- Abingdon On the River Ock · 11 km along the river
- Nearest gauge upstream
- Wantage On the Letcombe Brook · 4.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
86.9%
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 86.9 | 86.9% |
| 31 Jul 2026, 10:43 | 89.4 | 89.4% |
| 20 May 2026, 13:17 | 94.5 | 94.5% |
| 27 Apr 2026, 13:02 | 99 | 99% |
| 12 Mar 2026, 13:27 | 98.2 | 98.2% |
| 18 Feb 2026, 14:11 | 94.2 | 94.2% |
| 27 Jan 2026, 14:47 | 92.4 | 92.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.36 mg/l
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 8.36 | 8.36 mg/l |
| 31 Jul 2026, 10:43 | 8.49 | 8.49 mg/l |
| 20 May 2026, 13:17 | 9.5 | 9.5 mg/l |
| 27 Apr 2026, 13:02 | 10.2 | 10.2 mg/l |
| 12 Mar 2026, 13:27 | 11 | 11 mg/l |
| 18 Feb 2026, 14:11 | 11.1 | 11.1 mg/l |
| 27 Jan 2026, 14:47 | 10.7 | 10.7 mg/l |
Water temperature
code 0076 · °C
17.1 °C
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 17.1 | 17.1 °C |
| 31 Jul 2026, 10:43 | 17.7 | 17.7 °C |
| 20 May 2026, 13:17 | 15 | 15 °C |
| 27 Apr 2026, 13:02 | 14.1 | 14.1 °C |
| 12 Mar 2026, 13:27 | 10.2 | 10.2 °C |
| 18 Feb 2026, 14:11 | 8.1 | 8.1 °C |
| 27 Jan 2026, 14:47 | 8.9 | 8.9 °C |
pH
code 0061
8
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 8 | 8 |
| 31 Jul 2026, 10:43 | 8 | 8 |
| 20 May 2026, 13:17 | 8.18 | 8.18 |
| 27 Apr 2026, 13:02 | 8.2 | 8.2 |
| 12 Mar 2026, 13:27 | 8.46 | 8.46 |
| 18 Feb 2026, 14:11 | 8.12 | 8.12 |
| 27 Jan 2026, 14:47 | 7.94 | 7.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.51 mg/l
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 0.51 | 0.51 mg/l |
| 31 Jul 2026, 10:43 | 0.11 | 0.11 mg/l |
| 20 May 2026, 13:17 | 0.12 | 0.12 mg/l |
| 27 Apr 2026, 13:02 | 0.3 | 0.3 mg/l |
| 12 Mar 2026, 13:27 | 0.48 | 0.48 mg/l |
| 18 Feb 2026, 14:11 | 0.4 | 0.4 mg/l |
| 27 Jan 2026, 14:47 | 0.83 | 0.83 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
15.8 mg/l
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 15.8 | 15.8 mg/l |
| 31 Jul 2026, 10:43 | 15.9 | 15.9 mg/l |
| 20 May 2026, 13:17 | 11.9 | 11.9 mg/l |
| 27 Apr 2026, 13:02 | 9.92 | 9.92 mg/l |
| 12 Mar 2026, 13:27 | 9.62 | 9.62 mg/l |
| 18 Feb 2026, 14:11 | 9.64 | 9.64 mg/l |
| 27 Jan 2026, 14:47 | 6.06 | 6.06 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.17 mg/l
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 0.17 | 0.17 mg/l |
| 31 Jul 2026, 10:43 | 0.17 | 0.17 mg/l |
| 20 May 2026, 13:17 | 0.13 | 0.13 mg/l |
| 27 Apr 2026, 13:02 | 0.056 | 0.056 mg/l |
| 12 Mar 2026, 13:27 | 0.1 | 0.1 mg/l |
| 18 Feb 2026, 14:11 | 0.12 | 0.12 mg/l |
| 27 Jan 2026, 14:47 | 0.24 | 0.24 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
763 µS/cm
Sampled 24 Aug 2026, 45 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 12:23 | 763 | 763 µS/cm |
| 31 Jul 2026, 10:43 | 718 | 718 µS/cm |
| 20 May 2026, 13:17 | 330 | 330 µS/cm |
| 27 Apr 2026, 13:02 | 650 | 650 µS/cm |
| 12 Mar 2026, 13:27 | 645 | 645 µS/cm |
| 18 Feb 2026, 14:11 | 652 | 652 µS/cm |
| 27 Jan 2026, 14:47 | 532 | 532 µS/cm |
Everything measured here
20 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 20 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 7 | Jan 2026 – Aug 2026 | 86.9% 24 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 7 | Jan 2026 – Aug 2026 | 8.36 mg/l 24 Aug 2026 |
| Temperature of Water 0076 | River water | 7 | Jan 2026 – Aug 2026 | 17.1 °C 24 Aug 2026 |
| pH 0061 | River water | 7 | Jan 2026 – Aug 2026 | 8 24 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 7 | Jan 2026 – Aug 2026 | 0.51 mg/l 24 Aug 2026 |
| Nitrate as N 0117 | River water | 7 | Jan 2026 – Aug 2026 | 15.8 mg/l 24 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 7 | Jan 2026 – Aug 2026 | 0.17 mg/l 24 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 7 | Jan 2026 – Aug 2026 | 763 µS/cm 24 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 7 | Jan 2026 – Aug 2026 | 200 mg/l 24 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 7 | Jan 2026 – Aug 2026 | 0.0156 mg/l 24 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 7 | Jan 2026 – Aug 2026 | 3.6 mg/l 24 Aug 2026 |
| Chloride 0172 | River water | 7 | Jan 2026 – Aug 2026 | 47 mg/l 24 Aug 2026 |
| Flow Type 2896 | River water | 7 | Jan 2026 – Aug 2026 | Moderate Flow 24 Aug 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 1 | Mar 2026 – Mar 2026 | 1 text result 12 Mar 2026 |
| Nitrite as N 0118 | River water | 7 | Jan 2026 – Aug 2026 | 0.21 mg/l 24 Aug 2026 |
| Nitrogen, Total as N 9686 | River water | 7 | Jan 2026 – Aug 2026 | 18 mg/l 24 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 7 | Jan 2026 – Aug 2026 | 16 mg/l 24 Aug 2026 |
| Phosphorus, Total as P 0348 | River water | 7 | Jan 2026 – Aug 2026 | 0.35 mg/l 24 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 7 | Jan 2026 – Aug 2026 | 23 mg/l 24 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 7 | Jan 2026 – Aug 2026 | 32 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.