Delf Burn upstream of Hart Burn
EA name: DELF BURN U/S HART BURN
Environment Agency sampling point NE-42500191 · 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 Mar 2025, 11:2319 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 11 since 14 May 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 403705, 587782As published, to the nearest 1 m. Open in a map
- River, by its own name
- Delf Burn
- River, by the map
- Delf BurnPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Mitford On the River Wansbeck · 20 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (11 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
104.9%
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 104.9 | 104.9% |
| 4 Feb 2025, 10:44 | 102 | 102% |
| 10 Jan 2025, 08:58 | 76.2 | 76.2% |
| 4 Dec 2024, 11:13 | 101.3 | 101.3% |
| 7 Nov 2024, 11:29 | 98.6 | 98.6% |
| 4 Oct 2024, 11:24 | 99.5 | 99.5% |
| 4 Sep 2024, 11:14 | 93.4 | 93.4% |
| 1 Aug 2024, 10:51 | 101.1 | 101.1% |
| 2 Jul 2024, 10:45 | 99.8 | 99.8% |
| 4 Jun 2024, 13:18 | 94.6 | 94.6% |
| 14 May 2024, 10:52 | 102.3 | 102.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.9 mg/l
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 12.9 | 12.9 mg/l |
| 4 Feb 2025, 10:44 | 12.7 | 12.7 mg/l |
| 10 Jan 2025, 08:58 | 11.1 | 11.1 mg/l |
| 4 Dec 2024, 11:13 | 13 | 13 mg/l |
| 7 Nov 2024, 11:29 | 11.1 | 11.1 mg/l |
| 4 Oct 2024, 11:24 | 11.5 | 11.5 mg/l |
| 4 Sep 2024, 11:14 | 9.93 | 9.93 mg/l |
| 1 Aug 2024, 10:51 | 9.79 | 9.79 mg/l |
| 2 Jul 2024, 10:45 | 10.4 | 10.4 mg/l |
| 4 Jun 2024, 13:18 | 9.77 | 9.77 mg/l |
| 14 May 2024, 10:52 | 10.3 | 10.3 mg/l |
Water temperature
code 0076 · °C
6.5 °C
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 6.5 | 6.5 °C |
| 4 Feb 2025, 10:44 | 6 | 6 °C |
| 10 Jan 2025, 08:58 | 0.1 | 0.1 °C |
| 4 Dec 2024, 11:13 | 4.8 | 4.8 °C |
| 7 Nov 2024, 11:29 | 9.9 | 9.9 °C |
| 4 Oct 2024, 11:24 | 9.1 | 9.1 °C |
| 4 Sep 2024, 11:14 | 12.5 | 12.5 °C |
| 1 Aug 2024, 10:51 | 16.8 | 16.8 °C |
| 2 Jul 2024, 10:45 | 13.2 | 13.2 °C |
| 4 Jun 2024, 13:18 | 13.8 | 13.8 °C |
| 14 May 2024, 10:52 | 15 | 15 °C |
pH
code 0061
8.34
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 8.34 | 8.34 |
| 4 Feb 2025, 10:44 | 8.21 | 8.21 |
| 10 Jan 2025, 08:58 | 8.19 | 8.19 |
| 4 Dec 2024, 11:13 | 7.83 | 7.83 |
| 7 Nov 2024, 11:29 | 8.21 | 8.21 |
| 4 Oct 2024, 11:24 | 7.96 | 7.96 |
| 4 Sep 2024, 11:14 | 8.12 | 8.12 |
| 1 Aug 2024, 10:51 | 8.03 | 8.03 |
| 2 Jul 2024, 10:45 | 8.27 | 8.27 |
| 4 Jun 2024, 13:18 | 8.19 | 8.19 |
| 14 May 2024, 10:52 | 8.25 | 8.25 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jan 2025, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2024, 11:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2024, 11:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 11:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2024, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2024, 10:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jun 2024, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2024, 10:52 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.556 mg/l
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 0.556 | 0.556 mg/l |
| 4 Feb 2025, 10:44 | 0.616 | 0.616 mg/l |
| 10 Jan 2025, 08:58 | 0.686 | 0.686 mg/l |
| 4 Dec 2024, 11:13 | 0.916 | 0.916 mg/l |
| 7 Nov 2024, 11:29 | 0.566 | 0.566 mg/l |
| 4 Oct 2024, 11:24 | 0.276 | 0.276 mg/l |
| 4 Sep 2024, 11:14 | 0.376 | 0.376 mg/l |
| 1 Aug 2024, 10:51 | 0.336 | 0.336 mg/l |
| 2 Jul 2024, 10:45 | 0.416 | 0.416 mg/l |
| 4 Jun 2024, 13:18 | 0.576 | 0.576 mg/l |
| 14 May 2024, 10:52 | 0.316 | 0.316 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Feb 2025, 10:44 | <0.01 | below 0.01 mg/l (not detected above this) |
| 10 Jan 2025, 08:58 | 0.011 | 0.011 mg/l |
| 4 Dec 2024, 11:13 | 0.018 | 0.018 mg/l |
| 7 Nov 2024, 11:29 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Oct 2024, 11:24 | 0.017 | 0.017 mg/l |
| 4 Sep 2024, 11:14 | 0.011 | 0.011 mg/l |
| 1 Aug 2024, 10:51 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Jul 2024, 10:45 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Jun 2024, 13:18 | 0.011 | 0.011 mg/l |
| 14 May 2024, 10:52 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
363 µS/cm
Sampled 3 Mar 2025, 19 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Mar 2025, 11:23 | 363 | 363 µS/cm |
| 4 Feb 2025, 10:44 | 345 | 345 µS/cm |
| 10 Jan 2025, 08:58 | 133 | 133 µS/cm |
| 4 Dec 2024, 11:13 | 244 | 244 µS/cm |
| 7 Nov 2024, 11:29 | 357 | 357 µS/cm |
| 4 Oct 2024, 11:24 | 292 | 292 µS/cm |
| 4 Sep 2024, 11:14 | 358 | 358 µS/cm |
| 1 Aug 2024, 10:51 | 419 | 419 µS/cm |
| 2 Jul 2024, 10:45 | 447 | 447 µS/cm |
| 4 Jun 2024, 13:18 | 348 | 348 µS/cm |
| 14 May 2024, 10:52 | 326 | 326 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 | 11 | May 2024 – Mar 2025 | 104.9% 3 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 11 | May 2024 – Mar 2025 | 12.9 mg/l 3 Mar 2025 |
| Temperature of Water 0076 | River water | 11 | May 2024 – Mar 2025 | 6.5 °C 3 Mar 2025 |
| pH 0061 | River water | 11 | May 2024 – Mar 2025 | 8.34 3 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 11 | May 2024 – Mar 2025 | below 0.03 mg/l 3 Mar 2025 |
| Nitrate as N 0117 | River water | 11 | May 2024 – Mar 2025 | 0.556 mg/l 3 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 11 | May 2024 – Mar 2025 | below 0.01 mg/l 3 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 11 | May 2024 – Mar 2025 | 363 µS/cm 3 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 11 | May 2024 – Mar 2025 | 150 mg/l 3 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 11 | May 2024 – Mar 2025 | below 0.00042 mg/l 3 Mar 2025 |
| Nitrite as N 0118 | River water | 11 | May 2024 – Mar 2025 | below 0.004 mg/l 3 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 11 | May 2024 – Mar 2025 | 0.56 mg/l 3 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.