River Seaton at Hendra Bridge
EA name: RIVER SEATON AT HENDRA BRIDGE
Environment Agency sampling point SW-81310271 · 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
- 17 Mar 2025, 10:4119 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 13 since 8 Jan 2024 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 226500, 65658As published, to the nearest 1 m. Open in a map
- River, by its own name
- Seaton
- River, by the map
- River SeatonPlaced on the river its name gives, 12 m from the line.
- Next gauge downstream
- Trebrownbridge On the River Seaton · 8.4 km along the riverTREBROWNBRIDGE 8.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (13 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.7%
Sampled 17 Mar 2025, 19 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 10:41 | 100.7 | 100.7% |
| 29 Jan 2025, 10:55 | 98.4 | 98.4% |
| 30 Sep 2024, 10:25 | 99.2 | 99.2% |
| 14 Aug 2024, 10:41 | 97.7 | 97.7% |
| 1 Jul 2024, 11:10 | 97.3 | 97.3% |
| 24 May 2024, 10:25 | 97.8 | 97.8% |
| 24 Apr 2024, 10:15 | 102.2 | 102.2% |
Water temperature
code 0076 · °C
9.3 °C
Sampled 17 Mar 2025, 19 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 10:41 | 9.3 | 9.3 °C |
| 29 Jan 2025, 10:55 | 9.1 | 9.1 °C |
| 30 Sep 2024, 10:25 | 12.9 | 12.9 °C |
| 14 Aug 2024, 10:41 | 14.5 | 14.5 °C |
| 1 Jul 2024, 11:10 | 13 | 13 °C |
| 24 May 2024, 10:25 | 11.8 | 11.8 °C |
| 24 Apr 2024, 10:15 | 10.6 | 10.6 °C |
pH
code 0061
7.3
Sampled 17 Mar 2025, 19 months ago · 13 results banked
Every result (13)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 10:41 | 7.3 | 7.3 |
| 29 Jan 2025, 10:55 | 7.2 | 7.2 |
| 30 Sep 2024, 10:25 | 7.24 | 7.24 |
| 14 Aug 2024, 10:41 | 7.34 | 7.34 |
| 1 Jul 2024, 11:10 | 7.51 | 7.51 |
| 24 May 2024, 10:25 | 7.37 | 7.37 |
| 24 Apr 2024, 10:15 | 7.32 | 7.32 |
| 18 Mar 2024, 10:46 | 7.1 | 7.1 |
| 6 Mar 2024, 10:29 | 7.2 | 7.2 |
| 12 Feb 2024, 09:51 | 7 | 7 |
| 5 Feb 2024, 10:27 | 7.07 | 7.07 |
| 19 Jan 2024, 10:26 | 7.01 | 7.01 |
| 8 Jan 2024, 10:28 | 6.87 | 6.87 |
Conductivity
at 25 °C · code 0077 · µS/cm
150 µS/cm
Sampled 17 Mar 2025, 19 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 10:41 | 150 | 150 µS/cm |
| 29 Jan 2025, 10:55 | 146 | 146 µS/cm |
| 30 Sep 2024, 10:25 | 131 | 131 µS/cm |
| 14 Aug 2024, 10:41 | 158 | 158 µS/cm |
| 1 Jul 2024, 11:10 | 157 | 157 µS/cm |
| 24 May 2024, 10:25 | 147 | 147 µS/cm |
| 24 Apr 2024, 10:15 | 144 | 144 µS/cm |
Everything measured here
31 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 31 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 7 | Apr 2024 – Mar 2025 | 100.7% 17 Mar 2025 |
| Temperature of Water 0076 | River water | 7 | Apr 2024 – Mar 2025 | 9.3 °C 17 Mar 2025 |
| pH 0061 | River water | 13 | Jan 2024 – Mar 2025 | 7.3 17 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 7 | Apr 2024 – Mar 2025 | 150 µS/cm 17 Mar 2025 |
| Aluminium, Dissolved 6037 | River water | 6 | Jan 2024 – Mar 2024 | 39 µg/l 18 Mar 2024 |
| Barium, Dissolved 9446 | River water | 7 | Apr 2024 – Mar 2025 | below 10 µg/l 17 Mar 2025 |
| Boron, Dissolved 9447 | River water | 7 | Apr 2024 – Mar 2025 | below 100 µg/l 17 Mar 2025 |
| Cadmium 0108 | River water | 7 | Apr 2024 – Mar 2025 | 0.17 µg/l 17 Mar 2025 |
| Cadmium, Dissolved 0106 | River water | 13 | Jan 2024 – Mar 2025 | 0.16 µg/l 17 Mar 2025 |
| Calcium, Dissolved 0239 | River water | 13 | Jan 2024 – Mar 2025 | 10 mg/l 17 Mar 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 13 | Jan 2024 – Mar 2025 | 0.65 mg/l 17 Mar 2025 |
| Chromium, Dissolved 3409 | River water | 6 | Jan 2024 – Mar 2024 | below 0.5 µg/l 18 Mar 2024 |
| Copper 6452 | River water | 7 | Apr 2024 – Mar 2025 | 60 µg/l 17 Mar 2025 |
| Copper, Dissolved 6450 | River water | 13 | Jan 2024 – Mar 2025 | 48 µg/l 17 Mar 2025 |
| Hardness, Total as CaCO3 0158 | River water | 7 | Apr 2024 – Mar 2025 | 39.4 mg/l 17 Mar 2025 |
| Iron, Dissolved 6460 | River water | 7 | Apr 2024 – Mar 2025 | below 30 µg/l 17 Mar 2025 |
| Lead 0050 | River water | 7 | Apr 2024 – Mar 2025 | below 2 µg/l 17 Mar 2025 |
| Lead, Dissolved 0052 | River water | 13 | Jan 2024 – Mar 2025 | below 2 µg/l 17 Mar 2025 |
| Lithium, Dissolved 4201 | River water | 7 | Apr 2024 – Mar 2025 | below 100 µg/l 17 Mar 2025 |
| Magnesium, Dissolved 0235 | River water | 13 | Jan 2024 – Mar 2025 | 3.5 mg/l 17 Mar 2025 |
| Manganese, Dissolved 6458 | River water | 7 | Apr 2024 – Mar 2025 | 10 µg/l 17 Mar 2025 |
| Nickel 6462 | River water | 7 | Apr 2024 – Mar 2025 | below 1 µg/l 17 Mar 2025 |
| Nickel, Dissolved 3410 | River water | 13 | Jan 2024 – Mar 2025 | below 1 µg/l 17 Mar 2025 |
| pH : In Situ 3169 | River water | 2 | Jan 2025 – Mar 2025 | 7.36 17 Mar 2025 |
| Potassium, Dissolved 0209 | River water | 7 | Apr 2024 – Mar 2025 | 2.1 mg/l 17 Mar 2025 |
| Sodium, Dissolved 0205 | River water | 7 | Apr 2024 – Mar 2025 | 11 mg/l 17 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 7 | Apr 2024 – Mar 2025 | 3.5 mg/l 17 Mar 2025 |
| Strontium, Filtered 6693 | River water | 7 | Apr 2024 – Mar 2025 | 55 µg/l 17 Mar 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 7 | Apr 2024 – Mar 2025 | 11 mg/l 17 Mar 2025 |
| Zinc 6455 | River water | 7 | Apr 2024 – Mar 2025 | 39 µg/l 17 Mar 2025 |
| Zinc, Dissolved 3408 | River water | 13 | Jan 2024 – Mar 2025 | 38 µg/l 17 Mar 2025 |
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.