Slea at Sleaford Bridge
EA name: SLEA AT SLEAFORD BRIDGE
Environment Agency sampling point TH-PWER0015 · 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
- 28 Aug 2026, 14:4534 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 6 Jun 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 480150, 138260As published, to the nearest 10 m. Open in a map
- River, by its own name
- Slea
- River, by the map
- River SleaPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- Tilford On the River Wey · 15 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
74%
Sampled 28 Aug 2026, 34 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 74 | 74% |
| 2 Jul 2026, 17:36 | 74.7 | 74.7% |
| 12 Jun 2026, 16:34 | 81.6 | 81.6% |
| 14 May 2026, 18:05 | 86.5 | 86.5% |
| 17 Apr 2026, 17:16 | 98.4 | 98.4% |
| 12 Mar 2026, 14:55 | 94.7 | 94.7% |
| 13 Feb 2026, 14:43 | 93.4 | 93.4% |
| 7 Jan 2026, 15:04 | 95.4 | 95.4% |
| 2 Dec 2025, 14:55 | 88.2 | 88.2% |
| 6 Nov 2025, 15:46 | 76.2 | 76.2% |
| 6 Oct 2025, 13:50 | 76.5 | 76.5% |
| 2 Apr 2025, 13:14 | 108.6 | 108.6% |
| 3 Mar 2025, 15:36 | 96.1 | 96.1% |
| 3 Feb 2025, 15:28 | 93.7 | 93.7% |
| 13 Jan 2025, 16:28 | 95.2 | 95.2% |
| 2 Dec 2024, 09:21 | 91.4 | 91.4% |
| 5 Nov 2024, 16:46 | 84.3 | 84.3% |
| 2 Oct 2024, 14:05 | 88.4 | 88.4% |
| 4 Sep 2024, 10:09 | 79 | 79% |
| 13 Aug 2024, 13:04 | 78.6 | 78.6% |
| 11 Jul 2024, 09:35 | 81.8 | 81.8% |
| 6 Jun 2024, 13:32 | 88.8 | 88.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.1 mg/l
Sampled 28 Aug 2026, 34 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 7.1 | 7.1 mg/l |
| 2 Jul 2026, 17:36 | 7.08 | 7.08 mg/l |
| 12 Jun 2026, 16:34 | 8.3 | 8.3 mg/l |
| 14 May 2026, 18:05 | 9.52 | 9.52 mg/l |
| 17 Apr 2026, 17:16 | 10.3 | 10.3 mg/l |
| 12 Mar 2026, 14:55 | 10.8 | 10.8 mg/l |
| 13 Feb 2026, 14:43 | 11 | 11 mg/l |
| 7 Jan 2026, 15:04 | 12.7 | 12.7 mg/l |
| 2 Dec 2025, 14:55 | 10.3 | 10.3 mg/l |
| 6 Nov 2025, 15:46 | 8.01 | 8.01 mg/l |
| 6 Oct 2025, 13:50 | 8.11 | 8.11 mg/l |
| 2 Apr 2025, 13:14 | 12.1 | 12.1 mg/l |
| 3 Mar 2025, 15:36 | 11.9 | 11.9 mg/l |
| 3 Feb 2025, 15:28 | 11.8 | 11.8 mg/l |
| 13 Jan 2025, 16:28 | 12.3 | 12.3 mg/l |
| 2 Dec 2024, 09:21 | 10.4 | 10.4 mg/l |
| 5 Nov 2024, 16:46 | 9.39 | 9.39 mg/l |
| 2 Oct 2024, 14:05 | 9.27 | 9.27 mg/l |
| 4 Sep 2024, 10:09 | 8 | 8 mg/l |
| 13 Aug 2024, 13:04 | 7.59 | 7.59 mg/l |
| 11 Jul 2024, 09:35 | 8.34 | 8.34 mg/l |
| 6 Jun 2024, 13:32 | 9.31 | 9.31 mg/l |
Water temperature
code 0076 · °C
17.2 °C
Sampled 28 Aug 2026, 34 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 17.2 | 17.2 °C |
| 2 Jul 2026, 17:36 | 17.8 | 17.8 °C |
| 12 Jun 2026, 16:34 | 14.5 | 14.5 °C |
| 14 May 2026, 18:05 | 11 | 11 °C |
| 17 Apr 2026, 17:16 | 13 | 13 °C |
| 12 Mar 2026, 14:55 | 9.3 | 9.3 °C |
| 13 Feb 2026, 14:43 | 8.2 | 8.2 °C |
| 7 Jan 2026, 15:04 | 3.3 | 3.3 °C |
| 2 Dec 2025, 14:55 | 8.5 | 8.5 °C |
| 6 Nov 2025, 15:46 | 13 | 13 °C |
| 6 Oct 2025, 13:50 | 12.6 | 12.6 °C |
| 2 Apr 2025, 13:14 | 10.5 | 10.5 °C |
| 3 Mar 2025, 15:36 | 6 | 6 °C |
| 3 Feb 2025, 15:28 | 5.4 | 5.4 °C |
| 13 Jan 2025, 16:28 | 4.5 | 4.5 °C |
| 2 Dec 2024, 09:21 | 9.4 | 9.4 °C |
| 5 Nov 2024, 16:46 | 10.5 | 10.5 °C |
| 2 Oct 2024, 14:05 | 13.1 | 13.1 °C |
| 4 Sep 2024, 10:09 | 14.7 | 14.7 °C |
| 13 Aug 2024, 13:04 | 16.9 | 16.9 °C |
| 11 Jul 2024, 09:35 | 14.4 | 14.4 °C |
| 6 Jun 2024, 13:32 | 13.1 | 13.1 °C |
pH
code 0061
7.44
Sampled 28 Aug 2026, 34 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 7.44 | 7.44 |
| 2 Jul 2026, 17:36 | 7.42 | 7.42 |
| 12 Jun 2026, 16:34 | 7.41 | 7.41 |
| 14 May 2026, 18:05 | 7.54 | 7.54 |
| 17 Apr 2026, 17:16 | 7.75 | 7.75 |
| 12 Mar 2026, 14:55 | 7.88 | 7.88 |
| 13 Feb 2026, 14:43 | 7.64 | 7.64 |
| 7 Jan 2026, 15:04 | 7.86 | 7.86 |
| 2 Dec 2025, 14:55 | 7.27 | 7.27 |
| 6 Nov 2025, 15:46 | 7.18 | 7.18 |
| 6 Oct 2025, 13:50 | 7.38 | 7.38 |
| 2 Apr 2025, 13:14 | 7.86 | 7.86 |
| 3 Mar 2025, 15:36 | 7.85 | 7.85 |
| 3 Feb 2025, 15:28 | 7.82 | 7.82 |
| 13 Jan 2025, 16:28 | 7.8 | 7.8 |
| 2 Dec 2024, 09:21 | 7.64 | 7.64 |
| 5 Nov 2024, 16:46 | 7.57 | 7.57 |
| 2 Oct 2024, 14:05 | 7.46 | 7.46 |
| 4 Sep 2024, 10:09 | 7.43 | 7.43 |
| 13 Aug 2024, 13:04 | 7.32 | 7.32 |
| 6 Jun 2024, 13:32 | 7.61 | 7.61 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 28 Aug 2026, 34 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2026, 17:36 | 0.032 | 0.032 mg/l |
| 12 Jun 2026, 16:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 18:05 | 0.038 | 0.038 mg/l |
| 17 Apr 2026, 17:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2026, 14:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2026, 14:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 15:04 | 0.096 | 0.096 mg/l |
| 2 Dec 2025, 14:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2025, 15:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2025, 13:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 15:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2025, 15:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jan 2025, 16:28 | 0.034 | 0.034 mg/l |
| 2 Dec 2024, 09:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2024, 16:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2024, 14:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Aug 2024, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jul 2024, 09:35 | 0.032 | 0.032 mg/l |
| 6 Jun 2024, 13:32 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.596 mg/l
Sampled 28 Aug 2026, 34 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 0.596 | 0.596 mg/l |
| 2 Jul 2026, 17:36 | 0.996 | 0.996 mg/l |
| 12 Jun 2026, 16:34 | 1.09 | 1.09 mg/l |
| 14 May 2026, 18:05 | 1.49 | 1.49 mg/l |
| 17 Apr 2026, 17:16 | 1.69 | 1.69 mg/l |
| 12 Mar 2026, 14:55 | 1.99 | 1.99 mg/l |
| 13 Feb 2026, 14:43 | 2.19 | 2.19 mg/l |
| 7 Jan 2026, 15:04 | 1.99 | 1.99 mg/l |
| 2 Dec 2025, 14:55 | 2.29 | 2.29 mg/l |
| 6 Nov 2025, 15:46 | 1.79 | 1.79 mg/l |
| 6 Oct 2025, 13:50 | 0.786 | 0.786 mg/l |
| 3 Mar 2025, 15:36 | 2.69 | 2.69 mg/l |
| 3 Feb 2025, 15:28 | 2.59 | 2.59 mg/l |
| 13 Jan 2025, 16:28 | 2.89 | 2.89 mg/l |
| 5 Nov 2024, 16:46 | 1.8 | 1.8 mg/l |
| 2 Oct 2024, 14:05 | 2.09 | 2.09 mg/l |
| 4 Sep 2024, 10:09 | 0.896 | 0.896 mg/l |
| 13 Aug 2024, 13:04 | 1.1 | 1.1 mg/l |
| 11 Jul 2024, 09:35 | 1.99 | 1.99 mg/l |
| 6 Jun 2024, 13:32 | 1.99 | 1.99 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.1 mg/l
Sampled 28 Aug 2026, 34 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 0.1 | 0.1 mg/l |
| 2 Jul 2026, 17:36 | 0.13 | 0.13 mg/l |
| 12 Jun 2026, 16:34 | 0.14 | 0.14 mg/l |
| 14 May 2026, 18:05 | 0.095 | 0.095 mg/l |
| 17 Apr 2026, 17:16 | 0.096 | 0.096 mg/l |
| 12 Mar 2026, 14:55 | 0.11 | 0.11 mg/l |
| 13 Feb 2026, 14:43 | 0.15 | 0.15 mg/l |
| 7 Jan 2026, 15:04 | 0.11 | 0.11 mg/l |
| 2 Dec 2025, 14:55 | 0.12 | 0.12 mg/l |
| 6 Nov 2025, 15:46 | 0.08 | 0.08 mg/l |
| 6 Oct 2025, 13:50 | 0.069 | 0.069 mg/l |
| 3 Mar 2025, 15:36 | 0.11 | 0.11 mg/l |
| 3 Feb 2025, 15:28 | 0.12 | 0.12 mg/l |
| 13 Jan 2025, 16:28 | 0.12 | 0.12 mg/l |
| 2 Dec 2024, 09:21 | 0.14 | 0.14 mg/l |
| 5 Nov 2024, 16:46 | 0.12 | 0.12 mg/l |
| 2 Oct 2024, 14:05 | 0.12 | 0.12 mg/l |
| 4 Sep 2024, 10:09 | 0.099 | 0.099 mg/l |
| 13 Aug 2024, 13:04 | 0.13 | 0.13 mg/l |
| 11 Jul 2024, 09:35 | 0.12 | 0.12 mg/l |
| 6 Jun 2024, 13:32 | 0.13 | 0.13 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
293 µS/cm
Sampled 28 Aug 2026, 34 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 14:45 | 293 | 293 µS/cm |
| 2 Jul 2026, 17:36 | 338 | 338 µS/cm |
| 12 Jun 2026, 16:34 | 331 | 331 µS/cm |
| 14 May 2026, 18:05 | 360 | 360 µS/cm |
| 17 Apr 2026, 17:16 | 388 | 388 µS/cm |
| 12 Mar 2026, 14:55 | 391 | 391 µS/cm |
| 13 Feb 2026, 14:43 | 347 | 347 µS/cm |
| 7 Jan 2026, 15:04 | 441 | 441 µS/cm |
| 2 Dec 2025, 14:55 | 285 | 285 µS/cm |
| 6 Nov 2025, 15:46 | 335 | 335 µS/cm |
| 6 Oct 2025, 13:50 | 322 | 322 µS/cm |
| 2 Apr 2025, 13:14 | 394 | 394 µS/cm |
| 3 Mar 2025, 15:36 | 399 | 399 µS/cm |
| 3 Feb 2025, 15:28 | 401 | 401 µS/cm |
| 13 Jan 2025, 16:28 | 415 | 415 µS/cm |
| 2 Dec 2024, 09:21 | 316 | 316 µS/cm |
| 5 Nov 2024, 16:46 | 392 | 392 µS/cm |
| 2 Oct 2024, 14:05 | 292 | 292 µS/cm |
| 4 Sep 2024, 10:09 | 307 | 307 µS/cm |
| 13 Aug 2024, 13:04 | 322 | 322 µS/cm |
| 11 Jul 2024, 09:35 | 328 | 328 µS/cm |
| 6 Jun 2024, 13:32 | 389 | 389 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jun 2024 – Aug 2026 | 74% 28 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – Aug 2026 | 7.1 mg/l 28 Aug 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – Aug 2026 | 17.2 °C 28 Aug 2026 |
| pH 0061 | River water | 21 | Jun 2024 – Aug 2026 | 7.44 28 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Jun 2024 – Aug 2026 | below 0.03 mg/l 28 Aug 2026 |
| Nitrate as N 0117 | River water | 20 | Jun 2024 – Aug 2026 | 0.596 mg/l 28 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Jun 2024 – Aug 2026 | 0.1 mg/l 28 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – Aug 2026 | 293 µS/cm 28 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Jun 2024 – Aug 2026 | 85 mg/l 28 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Jun 2024 – Aug 2026 | below 0.00026 mg/l 28 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jun 2024 – Aug 2026 | below 3 mg/l 28 Aug 2026 |
| Nitrite as N 0118 | River water | 20 | Jun 2024 – Aug 2026 | below 0.004 mg/l 28 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Jun 2024 – Aug 2026 | 0.6 mg/l 28 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.