River Stour at Throop
EA name: RIVER STOUR AT THROOP
Environment Agency sampling point SW-50370272 · 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
- 23 Sep 2026, 10:2215 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 16 since 9 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives) · results completed 27 Sep 2026
- Where
- National Grid 411251, 96050As published, to the nearest 1 m. Open in a map
- River, by its own name
- Stour
- River, by the map
- River StourPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Iford Bridge On the River Stour · 5.9 km along the riverBeside Throop: too close to say above or below.
- Nearest gauge upstream
- Wimborne On the River Stour · 16 km along the river
- Why it was sampled
- Monitoring (national agency policy) (10 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Results here were completed a median of 5 days after the sample was taken (2 to 6 days, 8 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.5%
Sampled 23 Sep 2026, 15 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 96.5 | 96.5% |
| 28 Aug 2026, 11:52 | 90.8 | 90.8% |
| 10 Jul 2026, 08:56 | 80.9 | 80.9% |
| 4 Jun 2026, 08:47 | 80 | 80% |
| 21 May 2026, 08:53 | 88.4 | 88.4% |
| 17 Apr 2026, 11:06 | 102.6 | 102.6% |
| 6 Jan 2026, 10:23 | 91.9 | 91.9% |
| 15 Oct 2025, 08:33 | 71.9 | 71.9% |
| 28 Jul 2025, 08:32 | 58.3 | 58.3% |
| 3 Apr 2025, 10:35 | 98.4 | 98.4% |
| 2 Jan 2025, 08:37 | 91.8 | 91.8% |
| 4 Oct 2024, 08:12 | 73.2 | 73.2% |
| 3 Jul 2024, 16:16 | 100.5 | 100.5% |
| 8 Apr 2024, 09:34 | 94.9 | 94.9% |
| 12 Jan 2024, 11:11 | 92 | 92% |
| 9 Oct 2023, 15:03 | 89.2 | 89.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.32 mg/l
Sampled 23 Sep 2026, 15 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 9.32 | 9.32 mg/l |
| 28 Aug 2026, 11:52 | 8.27 | 8.27 mg/l |
| 10 Jul 2026, 08:56 | 6.99 | 6.99 mg/l |
| 4 Jun 2026, 08:47 | 7.83 | 7.83 mg/l |
| 21 May 2026, 08:53 | 9.03 | 9.03 mg/l |
| 17 Apr 2026, 11:06 | 10.8 | 10.8 mg/l |
| 6 Jan 2026, 10:23 | 12.3 | 12.3 mg/l |
| 15 Oct 2025, 08:33 | 7.51 | 7.51 mg/l |
| 28 Jul 2025, 08:32 | 5.53 | 5.53 mg/l |
| 3 Apr 2025, 10:35 | 10.7 | 10.7 mg/l |
| 2 Jan 2025, 08:37 | 10.7 | 10.7 mg/l |
| 4 Oct 2024, 08:12 | 7.8 | 7.8 mg/l |
| 3 Jul 2024, 16:16 | 9.45 | 9.45 mg/l |
| 8 Apr 2024, 09:34 | 10.1 | 10.1 mg/l |
| 12 Jan 2024, 11:11 | 11.3 | 11.3 mg/l |
| 9 Oct 2023, 15:03 | 8.78 | 8.78 mg/l |
Water temperature
code 0076 · °C
16.9 °C
Sampled 23 Sep 2026, 15 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 16.9 | 16.9 °C |
| 28 Aug 2026, 11:52 | 19.8 | 19.8 °C |
| 10 Jul 2026, 08:56 | 22.5 | 22.5 °C |
| 4 Jun 2026, 08:47 | 16.3 | 16.3 °C |
| 21 May 2026, 08:53 | 14.3 | 14.3 °C |
| 17 Apr 2026, 11:06 | 13.1 | 13.1 °C |
| 6 Jan 2026, 10:23 | 3.2 | 3.2 °C |
| 15 Oct 2025, 08:33 | 13.3 | 13.3 °C |
| 28 Jul 2025, 08:32 | 17.8 | 17.8 °C |
| 3 Apr 2025, 10:35 | 11.4 | 11.4 °C |
| 2 Jan 2025, 08:37 | 8.5 | 8.5 °C |
| 4 Oct 2024, 08:12 | 12.4 | 12.4 °C |
| 3 Jul 2024, 16:16 | 18.2 | 18.2 °C |
| 8 Apr 2024, 09:34 | 12.5 | 12.5 °C |
| 12 Jan 2024, 11:11 | 6.5 | 6.5 °C |
| 9 Oct 2023, 15:03 | 16 | 16 °C |
pH
code 0061
7.7
Sampled 23 Sep 2026, 15 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 7.7 | 7.7 |
| 28 Aug 2026, 11:52 | 8.01 | 8.01 |
| 10 Jul 2026, 08:56 | 8.05 | 8.05 |
| 4 Jun 2026, 08:47 | 7.8 | 7.8 |
| 21 May 2026, 08:53 | 8.31 | 8.31 |
| 17 Apr 2026, 11:06 | 8.24 | 8.24 |
| 6 Jan 2026, 10:23 | 8.1 | 8.1 |
| 15 Oct 2025, 08:33 | 7.65 | 7.65 |
| 28 Jul 2025, 08:32 | 7.73 | 7.73 |
| 3 Apr 2025, 10:35 | 8.3 | 8.3 |
| 2 Jan 2025, 08:37 | 8.01 | 8.01 |
| 4 Oct 2024, 08:12 | 7.59 | 7.59 |
| 3 Jul 2024, 16:16 | 8.23 | 8.23 |
| 8 Apr 2024, 09:34 | 8.07 | 8.07 |
| 12 Jan 2024, 11:11 | 7.98 | 7.98 |
| 9 Oct 2023, 15:03 | 7.85 | 7.85 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 23 Sep 2026, 15 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Aug 2026, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jul 2026, 08:56 | 0.048 | 0.048 mg/l |
| 4 Jun 2026, 08:47 | 0.16 | 0.16 mg/l |
| 21 May 2026, 08:53 | 0.072 | 0.072 mg/l |
| 17 Apr 2026, 11:06 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.67 mg/l
Sampled 23 Sep 2026, 15 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 7.67 | 7.67 mg/l |
| 28 Aug 2026, 11:52 | 6.46 | 6.46 mg/l |
| 10 Jul 2026, 08:56 | 7.23 | 7.23 mg/l |
| 4 Jun 2026, 08:47 | 6.3 | 6.3 mg/l |
| 21 May 2026, 08:53 | 7.55 | 7.55 mg/l |
| 17 Apr 2026, 11:06 | 7.98 | 7.98 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.18 mg/l
Sampled 23 Sep 2026, 15 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 0.18 | 0.18 mg/l |
| 28 Aug 2026, 11:52 | 0.21 | 0.21 mg/l |
| 10 Jul 2026, 08:56 | 0.14 | 0.14 mg/l |
| 4 Jun 2026, 08:47 | 0.091 | 0.091 mg/l |
| 21 May 2026, 08:53 | 0.041 | 0.041 mg/l |
| 17 Apr 2026, 11:06 | 0.037 | 0.037 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
642 µS/cm
Sampled 23 Sep 2026, 15 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Sep 2026, 10:22 | 642 | 642 µS/cm |
| 28 Aug 2026, 11:52 | 640 | 640 µS/cm |
| 10 Jul 2026, 08:56 | 712 | 712 µS/cm |
| 4 Jun 2026, 08:47 | 531 | 531 µS/cm |
| 21 May 2026, 08:53 | 616 | 616 µS/cm |
| 17 Apr 2026, 11:06 | 590 | 590 µS/cm |
| 6 Jan 2026, 10:23 | 553 | 553 µS/cm |
| 15 Oct 2025, 08:33 | 651 | 651 µS/cm |
| 28 Jul 2025, 08:32 | 663 | 663 µS/cm |
| 3 Apr 2025, 10:35 | 591 | 591 µS/cm |
| 2 Jan 2025, 08:37 | 578 | 578 µS/cm |
| 4 Oct 2024, 08:12 | 441 | 441 µS/cm |
| 3 Jul 2024, 16:16 | 602 | 602 µS/cm |
| 8 Apr 2024, 09:34 | 545 | 545 µS/cm |
| 12 Jan 2024, 11:11 | 589 | 589 µS/cm |
| 9 Oct 2023, 15:03 | 616 | 616 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 | 16 | Oct 2023 – Sep 2026 | 96.5% 23 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Sep 2026 | 9.32 mg/l 23 Sep 2026 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Sep 2026 | 16.9 °C 23 Sep 2026 |
| pH 0061 | River water | 16 | Oct 2023 – Sep 2026 | 7.7 23 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 6 | Apr 2026 – Sep 2026 | below 0.03 mg/l 23 Sep 2026 |
| Nitrate as N 0117 | River water | 6 | Apr 2026 – Sep 2026 | 7.67 mg/l 23 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 6 | Apr 2026 – Sep 2026 | 0.18 mg/l 23 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Sep 2026 | 642 µS/cm 23 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Apr 2026 – Sep 2026 | 200 mg/l 23 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Apr 2026 – Sep 2026 | below 0.00046 mg/l 23 Sep 2026 |
| Nitrite as N 0118 | River water | 6 | Apr 2026 – Sep 2026 | 0.029 mg/l 23 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 6 | Apr 2026 – Sep 2026 | 7.7 mg/l 23 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.