South Level Engine Drain at Tunnel Pits
EA name: SOUTH LEVEL ENGINE DRAIN AT TUNNEL PITS
Environment Agency sampling point MD-37219900 · 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
- 21 Aug 2026, 09:0441 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 20 since 1 Aug 2025 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 474092, 403921As published, to the nearest 1 m. Open in a map
- River, by its own name
- South Level Engine Drain
- River, by the map
- South Engine DrainPlaced on a river whose name partly matches its own, 1 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (national agency policy) (16 samples)
Environmental monitoring statutory (EU directives) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
53.6%
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 53.6 | 53.6% |
| 8 Jul 2026, 11:07 | 125.4 | 125.4% |
| 9 Jun 2026, 08:06 | 111.9 | 111.9% |
| 20 May 2026, 10:20 | 104.2 | 104.2% |
| 14 Apr 2026, 15:37 | 109.2 | 109.2% |
| 9 Apr 2026, 07:36 | 107.8 | 107.8% |
| 27 Mar 2026, 13:58 | 95.7 | 95.7% |
| 20 Mar 2026, 09:55 | 89.3 | 89.3% |
| 4 Mar 2026, 09:35 | 86.2 | 86.2% |
| 18 Feb 2026, 08:14 | 87.3 | 87.3% |
| 27 Jan 2026, 14:57 | 83.4 | 83.4% |
| 18 Dec 2025, 09:44 | 78.7 | 78.7% |
| 2 Dec 2025, 08:45 | 84.7 | 84.7% |
| 17 Nov 2025, 10:52 | 67.8 | 67.8% |
| 5 Nov 2025, 07:49 | 83.9 | 83.9% |
| 30 Oct 2025, 08:12 | 80 | 80% |
| 17 Oct 2025, 15:02 | 57.9 | 57.9% |
| 18 Sep 2025, 13:31 | 89.9 | 89.9% |
| 28 Aug 2025, 09:50 | 92.1 | 92.1% |
| 1 Aug 2025, 07:56 | 112.4 | 112.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.22 mg/l
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 5.22 | 5.22 mg/l |
| 8 Jul 2026, 11:07 | 11 | 11 mg/l |
| 9 Jun 2026, 08:06 | 11.2 | 11.2 mg/l |
| 20 May 2026, 10:20 | 10.6 | 10.6 mg/l |
| 14 Apr 2026, 15:37 | 11.7 | 11.7 mg/l |
| 9 Apr 2026, 07:36 | 11.4 | 11.4 mg/l |
| 27 Mar 2026, 13:58 | 11.2 | 11.2 mg/l |
| 20 Mar 2026, 09:55 | 10.1 | 10.1 mg/l |
| 4 Mar 2026, 09:35 | 10.3 | 10.3 mg/l |
| 18 Feb 2026, 08:14 | 11.6 | 11.6 mg/l |
| 27 Jan 2026, 14:57 | 10.6 | 10.6 mg/l |
| 18 Dec 2025, 09:44 | 9.35 | 9.35 mg/l |
| 2 Dec 2025, 08:45 | 10 | 10 mg/l |
| 17 Nov 2025, 10:52 | 8.1 | 8.1 mg/l |
| 5 Nov 2025, 07:49 | 9 | 9 mg/l |
| 30 Oct 2025, 08:12 | 9.67 | 9.67 mg/l |
| 17 Oct 2025, 15:02 | 6.24 | 6.24 mg/l |
| 18 Sep 2025, 13:31 | 8.98 | 8.98 mg/l |
| 28 Aug 2025, 09:50 | 8.82 | 8.82 mg/l |
| 1 Aug 2025, 07:56 | 10.4 | 10.4 mg/l |
Water temperature
code 0076 · °C
16.5 °C
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 16.5 | 16.5 °C |
| 8 Jul 2026, 11:07 | 21.9 | 21.9 °C |
| 9 Jun 2026, 08:06 | 15.2 | 15.2 °C |
| 20 May 2026, 10:20 | 14.4 | 14.4 °C |
| 14 Apr 2026, 15:37 | 12.3 | 12.3 °C |
| 9 Apr 2026, 07:36 | 12.8 | 12.8 °C |
| 27 Mar 2026, 13:58 | 8.6 | 8.6 °C |
| 20 Mar 2026, 09:55 | 10 | 10 °C |
| 4 Mar 2026, 09:35 | 7.7 | 7.7 °C |
| 18 Feb 2026, 08:14 | 3.4 | 3.4 °C |
| 27 Jan 2026, 14:57 | 5.2 | 5.2 °C |
| 18 Dec 2025, 09:44 | 7.8 | 7.8 °C |
| 2 Dec 2025, 08:45 | 8 | 8 °C |
| 17 Nov 2025, 10:52 | 7.6 | 7.6 °C |
| 5 Nov 2025, 07:49 | 12.1 | 12.1 °C |
| 30 Oct 2025, 08:12 | 7.1 | 7.1 °C |
| 17 Oct 2025, 15:02 | 11.9 | 11.9 °C |
| 18 Sep 2025, 13:31 | 15.3 | 15.3 °C |
| 28 Aug 2025, 09:50 | 17.3 | 17.3 °C |
| 1 Aug 2025, 07:56 | 18.8 | 18.8 °C |
pH
code 0061
7.49
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 7.49 | 7.49 |
| 8 Jul 2026, 11:07 | 8.43 | 8.43 |
| 9 Jun 2026, 08:06 | 8.16 | 8.16 |
| 20 May 2026, 10:20 | 8.02 | 8.02 |
| 14 Apr 2026, 15:37 | 7.7 | 7.7 |
| 9 Apr 2026, 07:36 | 7.83 | 7.83 |
| 27 Mar 2026, 13:58 | 7.64 | 7.64 |
| 20 Mar 2026, 09:55 | 7.53 | 7.53 |
| 4 Mar 2026, 09:35 | 7.55 | 7.55 |
| 18 Feb 2026, 08:14 | 7.56 | 7.56 |
| 27 Jan 2026, 14:57 | 7.33 | 7.33 |
| 18 Dec 2025, 09:44 | 7.04 | 7.04 |
| 2 Dec 2025, 08:45 | 7.25 | 7.25 |
| 17 Nov 2025, 10:52 | 7.18 | 7.18 |
| 5 Nov 2025, 07:49 | 7.84 | 7.84 |
| 30 Oct 2025, 08:12 | 7.76 | 7.76 |
| 17 Oct 2025, 15:02 | 7.25 | 7.25 |
| 18 Sep 2025, 13:31 | 7.61 | 7.61 |
| 28 Aug 2025, 09:50 | 8.08 | 8.08 |
| 1 Aug 2025, 07:56 | 8.07 | 8.07 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.18 mg/l
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 0.18 | 0.18 mg/l |
| 8 Jul 2026, 11:07 | 0.086 | 0.086 mg/l |
| 9 Jun 2026, 08:06 | 0.056 | 0.056 mg/l |
| 20 May 2026, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 15:37 | 0.16 | 0.16 mg/l |
| 9 Apr 2026, 07:36 | 0.22 | 0.22 mg/l |
| 27 Mar 2026, 13:58 | 0.32 | 0.32 mg/l |
| 20 Mar 2026, 09:55 | 0.61 | 0.61 mg/l |
| 4 Mar 2026, 09:35 | 0.39 | 0.39 mg/l |
| 18 Feb 2026, 08:14 | 0.47 | 0.47 mg/l |
| 27 Jan 2026, 14:57 | 0.61 | 0.61 mg/l |
| 18 Dec 2025, 09:44 | 0.61 | 0.61 mg/l |
| 2 Dec 2025, 08:45 | 0.54 | 0.54 mg/l |
| 17 Nov 2025, 10:52 | 0.33 | 0.33 mg/l |
| 5 Nov 2025, 07:49 | 0.17 | 0.17 mg/l |
| 30 Oct 2025, 08:12 | 0.21 | 0.21 mg/l |
| 17 Oct 2025, 15:02 | 0.057 | 0.057 mg/l |
| 18 Sep 2025, 13:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Aug 2025, 09:50 | 0.053 | 0.053 mg/l |
| 1 Aug 2025, 07:56 | 0.055 | 0.055 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11.7 mg/l
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 11.7 | 11.7 mg/l |
| 8 Jul 2026, 11:07 | 10.9 | 10.9 mg/l |
| 9 Jun 2026, 08:06 | 10.9 | 10.9 mg/l |
| 20 May 2026, 10:20 | 1.89 | 1.89 mg/l |
| 14 Apr 2026, 15:37 | 4.57 | 4.57 mg/l |
| 9 Apr 2026, 07:36 | 9.06 | 9.06 mg/l |
| 27 Mar 2026, 13:58 | 5.17 | 5.17 mg/l |
| 20 Mar 2026, 09:55 | 6.16 | 6.16 mg/l |
| 4 Mar 2026, 09:35 | 8.07 | 8.07 mg/l |
| 18 Feb 2026, 08:14 | 9.18 | 9.18 mg/l |
| 27 Jan 2026, 14:57 | 9.17 | 9.17 mg/l |
| 18 Dec 2025, 09:44 | 9.93 | 9.93 mg/l |
| 2 Dec 2025, 08:45 | 9.94 | 9.94 mg/l |
| 17 Nov 2025, 10:52 | 9.87 | 9.87 mg/l |
| 5 Nov 2025, 07:49 | 0.499 | 0.499 mg/l |
| 30 Oct 2025, 08:12 | 0.587 | 0.587 mg/l |
| 17 Oct 2025, 15:02 | 0.468 | 0.468 mg/l |
| 18 Sep 2025, 13:31 | 4.79 | 4.79 mg/l |
| 28 Aug 2025, 09:50 | 9.24 | 9.24 mg/l |
| 1 Aug 2025, 07:56 | 8.17 | 8.17 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.26 mg/l
Sampled 21 Aug 2026, 41 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 09:04 | 0.26 | 0.26 mg/l |
| 8 Jul 2026, 11:07 | 0.13 | 0.13 mg/l |
| 9 Jun 2026, 08:06 | 0.06 | 0.06 mg/l |
| 20 May 2026, 10:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Apr 2026, 15:37 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Apr 2026, 07:36 | 0.023 | 0.023 mg/l |
| 27 Mar 2026, 13:58 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Mar 2026, 09:55 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2026, 09:35 | 0.011 | 0.011 mg/l |
| 18 Feb 2026, 08:14 | 0.02 | 0.02 mg/l |
| 27 Jan 2026, 14:57 | 0.013 | 0.013 mg/l |
| 18 Dec 2025, 09:44 | 0.017 | 0.017 mg/l |
| 2 Dec 2025, 08:45 | 0.015 | 0.015 mg/l |
| 17 Nov 2025, 10:52 | 0.029 | 0.029 mg/l |
| 5 Nov 2025, 07:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 Oct 2025, 08:12 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Oct 2025, 15:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Sep 2025, 13:31 | 0.017 | 0.017 mg/l |
| 28 Aug 2025, 09:50 | 0.095 | 0.095 mg/l |
| 1 Aug 2025, 07:56 | 0.082 | 0.082 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1148 µS/cm
Sampled 20 May 2026, 4 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 10:20 | 1148 | 1148 µS/cm |
| 14 Apr 2026, 15:37 | 1344 | 1344 µS/cm |
| 9 Apr 2026, 07:36 | 1355 | 1355 µS/cm |
| 27 Mar 2026, 13:58 | 1227 | 1227 µS/cm |
| 20 Mar 2026, 09:55 | 1314 | 1314 µS/cm |
| 4 Mar 2026, 09:35 | 1253 | 1253 µS/cm |
| 18 Feb 2026, 08:14 | 1171 | 1171 µS/cm |
| 27 Jan 2026, 14:57 | 1250 | 1250 µS/cm |
| 18 Dec 2025, 09:44 | 1322 | 1322 µS/cm |
| 2 Dec 2025, 08:45 | 1281 | 1281 µS/cm |
| 17 Nov 2025, 10:52 | 1216 | 1216 µS/cm |
| 5 Nov 2025, 07:49 | 1006 | 1006 µS/cm |
| 30 Oct 2025, 08:12 | 985 | 985 µS/cm |
| 17 Oct 2025, 15:02 | 1113 | 1113 µS/cm |
| 18 Sep 2025, 13:31 | 1384 | 1384 µS/cm |
| 28 Aug 2025, 09:50 | 1528 | 1528 µS/cm |
| 1 Aug 2025, 07:56 | 1247 | 1247 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Aug 2025 – Aug 2026 | 53.6% 21 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Aug 2025 – Aug 2026 | 5.22 mg/l 21 Aug 2026 |
| Temperature of Water 0076 | River water | 20 | Aug 2025 – Aug 2026 | 16.5 °C 21 Aug 2026 |
| pH 0061 | River water | 20 | Aug 2025 – Aug 2026 | 7.49 21 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Aug 2025 – Aug 2026 | 0.18 mg/l 21 Aug 2026 |
| Nitrate as N 0117 | River water | 20 | Aug 2025 – Aug 2026 | 11.7 mg/l 21 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Aug 2025 – Aug 2026 | 0.26 mg/l 21 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 17 | Aug 2025 – May 2026 | 1148 µS/cm 20 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Aug 2025 – Aug 2026 | 190 mg/l 21 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Aug 2025 – Aug 2026 | 0.00166 mg/l 21 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 19 | Aug 2025 – Aug 2026 | below 3 mg/l 21 Aug 2026 |
| Nitrite as N 0118 | River water | 20 | Aug 2025 – Aug 2026 | 0.29 mg/l 21 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Aug 2025 – Aug 2026 | 12 mg/l 21 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 4 | Apr 2026 – Aug 2026 | below 3 mg/l 21 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.