Hydropower Outfall Nenthead
EA name: HYDROPOWER OUTFALL NENTHEAD (also listed as “HYDROPOWER SCHEME OUTFALL NENTHEAD”)
Environment Agency sampling point NE-43400434 · 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
- 12 Aug 2026, 10:5850 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 30 since 29 Nov 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 378372, 543344As 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
- Not placedTwo watercourses within reach (1 m and 52 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (28 samples)
Unplanned reactive monitoring (pollution incidents) (2 samples)
14 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
107.9%
Sampled 12 Aug 2026, 50 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 10:58 | 107.9 | 107.9% |
| 14 Apr 2026, 13:02 | 101.5 | 101.5% |
| 17 Mar 2026, 13:55 | 102.1 | 102.1% |
| 18 Feb 2026, 16:56 | 101.8 | 101.8% |
| 21 Jan 2026, 12:34 | 99.3 | 99.3% |
| 15 Dec 2025, 11:34 | 101.1 | 101.1% |
| 26 Nov 2025, 13:14 | 99.5 | 99.5% |
| 25 Jun 2025, 11:50 | 100.6 | 100.6% |
| 5 Dec 2024, 13:34 | 101 | 101% |
| 22 Oct 2024, 13:55 | 100.7 | 100.7% |
| 17 Jul 2024, 14:02 | 99.6 | 99.6% |
| 30 May 2024, 14:23 | 101.1 | 101.1% |
| 16 Apr 2024, 13:04 | 101.3 | 101.3% |
| 26 Mar 2024, 14:42 | 100.9 | 100.9% |
| 24 Jan 2024, 13:47 | 99.7 | 99.7% |
| 29 Nov 2023, 15:47 | 101.4 | 101.4% |
Water temperature
code 0076 · °C
15.3 °C
Sampled 12 Aug 2026, 50 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 10:58 | 15.3 | 15.3 °C |
| 14 Apr 2026, 13:02 | 6.4 | 6.4 °C |
| 17 Mar 2026, 13:55 | 7.1 | 7.1 °C |
| 18 Feb 2026, 16:56 | 1.3 | 1.3 °C |
| 21 Jan 2026, 12:34 | 3.5 | 3.5 °C |
| 15 Dec 2025, 11:34 | 6.5 | 6.5 °C |
| 26 Nov 2025, 13:14 | 2.1 | 2.1 °C |
| 25 Jun 2025, 11:50 | 14.3 | 14.3 °C |
| 5 Dec 2024, 13:34 | 5.3 | 5.3 °C |
| 22 Oct 2024, 13:55 | 8.2 | 8.2 °C |
| 17 Jul 2024, 14:02 | 15.6 | 15.6 °C |
| 30 May 2024, 14:23 | 11.9 | 11.9 °C |
| 16 Apr 2024, 13:04 | 6.7 | 6.7 °C |
| 26 Mar 2024, 14:42 | 4.7 | 4.7 °C |
| 24 Jan 2024, 13:47 | 4.6 | 4.6 °C |
| 29 Nov 2023, 15:47 | 2.2 | 2.2 °C |
pH
code 0061
8.3
Sampled 12 Aug 2026, 50 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 10:58 | 8.3 | 8.3 |
| 14 Apr 2026, 13:02 | 7.5 | 7.5 |
| 17 Mar 2026, 13:55 | 7.2 | 7.2 |
| 18 Feb 2026, 16:56 | 7.1 | 7.1 |
| 21 Jan 2026, 12:34 | 8.2 | 8.2 |
| 15 Dec 2025, 11:34 | 7 | 7 |
| 26 Nov 2025, 13:14 | 6.6 | 6.6 |
| 25 Jun 2025, 11:50 | 8.2 | 8.2 |
| 5 Dec 2024, 13:34 | 7.4 | 7.4 |
| 22 Oct 2024, 13:55 | 6.7 | 6.7 |
| 17 Jul 2024, 14:02 | 7.74 | 7.74 |
| 30 May 2024, 14:23 | 7.32 | 7.32 |
| 16 Apr 2024, 13:04 | 7.67 | 7.67 |
| 26 Mar 2024, 14:42 | 7.96 | 7.96 |
| 24 Jan 2024, 13:47 | 7.92 | 7.92 |
| 29 Nov 2023, 15:47 | 7.33 | 7.33 |
Conductivity
at 25 °C · code 0077 · µS/cm
216 µS/cm
Sampled 12 Aug 2026, 50 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 10:58 | 216 | 216 µS/cm |
| 14 Apr 2026, 13:02 | 53 | 53 µS/cm |
| 17 Mar 2026, 13:55 | 72 | 72 µS/cm |
| 18 Feb 2026, 16:56 | 214 | 214 µS/cm |
| 21 Jan 2026, 12:34 | 128 | 128 µS/cm |
| 15 Dec 2025, 11:34 | 43 | 43 µS/cm |
| 26 Nov 2025, 13:14 | 45 | 45 µS/cm |
| 25 Jun 2025, 11:50 | 181 | 181 µS/cm |
| 5 Dec 2024, 13:34 | 70 | 70 µS/cm |
| 22 Oct 2024, 13:55 | 48 | 48 µS/cm |
| 17 Jul 2024, 14:02 | 39 | 39 µS/cm |
| 30 May 2024, 14:23 | 45 | 45 µS/cm |
| 16 Apr 2024, 13:04 | 51 | 51 µS/cm |
| 26 Mar 2024, 14:42 | 98 | 98 µS/cm |
| 24 Jan 2024, 13:47 | 81 | 81 µS/cm |
| 29 Nov 2023, 15:47 | 50 | 50 µS/cm |
Everything measured here
30 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 30 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 16 | Nov 2023 – Aug 2026 | 107.9% 12 Aug 2026 |
| Temperature of Water 0076 | River water | 16 | Nov 2023 – Aug 2026 | 15.3 °C 12 Aug 2026 |
| pH 0061 | River water | 16 | Nov 2023 – Aug 2026 | 8.3 12 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 16 | Nov 2023 – Aug 2026 | 216 µS/cm 12 Aug 2026 |
| Barium, Dissolved 9446 | River water | 15 | Nov 2023 – Aug 2026 | 56 µg/l 12 Aug 2026 |
| Boron, Dissolved 9447 | River water | 15 | Nov 2023 – Aug 2026 | below 100 µg/l 12 Aug 2026 |
| Cadmium 0108 | River water | 15 | Nov 2023 – Aug 2026 | below 0.1 µg/l 12 Aug 2026 |
| Cadmium, Dissolved 0106 | River water | 15 | Nov 2023 – Aug 2026 | below 0.1 µg/l 12 Aug 2026 |
| Calcium, Dissolved 0239 | River water | 15 | Nov 2023 – Aug 2026 | 28 mg/l 12 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 16 | Nov 2023 – Aug 2026 | 7.4 mg/l 12 Aug 2026 |
| Copper 6452 | River water | 15 | Nov 2023 – Aug 2026 | below 1 µg/l 12 Aug 2026 |
| Copper, Dissolved 6450 | River water | 15 | Nov 2023 – Aug 2026 | below 1 µg/l 12 Aug 2026 |
| Hardness, Total as CaCO3 0158 | River water | 15 | Nov 2023 – Aug 2026 | 94.6 mg/l 12 Aug 2026 |
| Iron, Dissolved 6460 | River water | 15 | Nov 2023 – Aug 2026 | 640 µg/l 12 Aug 2026 |
| Lead 0050 | River water | 15 | Nov 2023 – Aug 2026 | 6 µg/l 12 Aug 2026 |
| Lead, Dissolved 0052 | River water | 15 | Nov 2023 – Aug 2026 | 3.3 µg/l 12 Aug 2026 |
| Lithium, Dissolved 4201 | River water | 15 | Nov 2023 – Aug 2026 | below 100 µg/l 12 Aug 2026 |
| Magnesium, Dissolved 0235 | River water | 15 | Nov 2023 – Aug 2026 | 6 mg/l 12 Aug 2026 |
| Manganese, Dissolved 6458 | River water | 15 | Nov 2023 – Aug 2026 | 19 µg/l 12 Aug 2026 |
| Nickel 6462 | River water | 15 | Nov 2023 – Aug 2026 | 1.2 µg/l 12 Aug 2026 |
| Nickel, Dissolved 3410 | River water | 15 | Nov 2023 – Aug 2026 | 1 µg/l 12 Aug 2026 |
| No flow /No sample 7668 | River water | 14 | Sep 2024 – Jul 2026 | No flow/discharge at sampling point 14 Jul 2026 |
| pH : In Situ 3169 | River water | 9 | Dec 2024 – Aug 2026 | 8.41 12 Aug 2026 |
| Potassium, Dissolved 0209 | River water | 15 | Nov 2023 – Aug 2026 | 0.93 mg/l 12 Aug 2026 |
| Sodium, Dissolved 0205 | River water | 15 | Nov 2023 – Aug 2026 | 3.7 mg/l 12 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 16 | Nov 2023 – Aug 2026 | below 3 mg/l 12 Aug 2026 |
| Strontium, Filtered 6693 | River water | 15 | Nov 2023 – Aug 2026 | 96 µg/l 12 Aug 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 15 | Nov 2023 – Aug 2026 | below 10 mg/l 12 Aug 2026 |
| Zinc 6455 | River water | 15 | Nov 2023 – Aug 2026 | 39 µg/l 12 Aug 2026 |
| Zinc, Dissolved 3408 | River water | 15 | Nov 2023 – Aug 2026 | 27 µg/l 12 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.