Darleyford Stream at Lower Lake
EA name: DARLEYFORD STREAM AT LOWER LAKE
Environment Agency sampling point SW-91253450 · 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
- 24 Aug 2026, 11:1638 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 23 since 12 Jan 2024 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 228611, 73480As published, to the nearest 1 m. Open in a map
- River, by its own name
- Darleyford Stream
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 2 m from the line.
- Next gauge downstream
- Pillaton On the River Lynher · 17 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Planned investigation (local monitoring) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
101%
Sampled 24 Aug 2026, 38 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 11:16 | 101 | 101% |
| 15 Jul 2026, 11:25 | 100.6 | 100.6% |
| 29 Jun 2026, 11:22 | 98.4 | 98.4% |
| 29 May 2026, 10:54 | 100.1 | 100.1% |
| 21 Apr 2026, 10:41 | 101.5 | 101.5% |
| 10 Mar 2026, 12:52 | 99.5 | 99.5% |
| 19 Feb 2026, 13:36 | 98.9 | 98.9% |
| 15 Jan 2026, 12:38 | 101.8 | 101.8% |
| 18 Dec 2025, 12:29 | 98.6 | 98.6% |
| 18 Nov 2025, 13:21 | 101.8 | 101.8% |
| 23 Oct 2025, 14:06 | 98.8 | 98.8% |
| 18 Sep 2025, 14:22 | 96.6 | 96.6% |
| 22 Aug 2025, 14:33 | 96.8 | 96.8% |
| 24 Jul 2025, 13:48 | 100.6 | 100.6% |
| 25 Jun 2025, 14:00 | 97.9 | 97.9% |
| 24 Apr 2025, 12:41 | 101.3 | 101.3% |
Water temperature
code 0076 · °C
13.3 °C
Sampled 24 Aug 2026, 38 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 11:16 | 13.3 | 13.3 °C |
| 15 Jul 2026, 11:25 | 15.1 | 15.1 °C |
| 29 Jun 2026, 11:22 | 13.4 | 13.4 °C |
| 29 May 2026, 10:54 | 13.4 | 13.4 °C |
| 21 Apr 2026, 10:41 | 10 | 10 °C |
| 10 Mar 2026, 12:52 | 11 | 11 °C |
| 19 Feb 2026, 13:36 | 10.3 | 10.3 °C |
| 15 Jan 2026, 12:38 | 10.5 | 10.5 °C |
| 18 Dec 2025, 12:29 | 11 | 11 °C |
| 18 Nov 2025, 13:21 | 11.5 | 11.5 °C |
| 23 Oct 2025, 14:06 | 11.5 | 11.5 °C |
| 18 Sep 2025, 14:22 | 14.2 | 14.2 °C |
| 22 Aug 2025, 14:33 | 14.2 | 14.2 °C |
| 24 Jul 2025, 13:48 | 14.8 | 14.8 °C |
| 25 Jun 2025, 14:00 | 14.3 | 14.3 °C |
| 24 Apr 2025, 12:41 | 11.8 | 11.8 °C |
pH
code 0061
5.7
Sampled 24 Aug 2026, 38 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 11:16 | 5.7 | 5.7 |
| 15 Jul 2026, 11:25 | 7.1 | 7.1 |
| 29 Jun 2026, 11:22 | 7.2 | 7.2 |
| 29 May 2026, 10:54 | 7.2 | 7.2 |
| 21 Apr 2026, 10:41 | 6.9 | 6.9 |
| 10 Mar 2026, 12:52 | 7.1 | 7.1 |
| 19 Feb 2026, 13:36 | 6.8 | 6.8 |
| 15 Jan 2026, 12:38 | 7 | 7 |
| 18 Dec 2025, 12:29 | 7 | 7 |
| 18 Nov 2025, 13:21 | 7.1 | 7.1 |
| 23 Oct 2025, 14:06 | 7 | 7 |
| 18 Sep 2025, 14:22 | 7.1 | 7.1 |
| 22 Aug 2025, 14:33 | 7.1 | 7.1 |
| 24 Jul 2025, 13:48 | 7.1 | 7.1 |
| 25 Jun 2025, 14:00 | 7.1 | 7.1 |
| 22 May 2025, 13:16 | 7.5 | 7.5 |
| 24 Apr 2025, 12:41 | 7.1 | 7.1 |
| 27 Mar 2024, 12:08 | 6.9 | 6.9 |
| 11 Mar 2024, 12:13 | 6.93 | 6.93 |
| 26 Feb 2024, 10:55 | 6.75 | 6.75 |
| 9 Feb 2024, 11:37 | 6.68 | 6.68 |
| 18 Jan 2024, 12:37 | 6.65 | 6.65 |
| 12 Jan 2024, 12:26 | 6.65 | 6.65 |
Conductivity
at 25 °C · code 0077 · µS/cm
103 µS/cm
Sampled 24 Aug 2026, 38 days ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 11:16 | 103 | 103 µS/cm |
| 15 Jul 2026, 11:25 | 99 | 99 µS/cm |
| 29 Jun 2026, 11:22 | 96 | 96 µS/cm |
| 29 May 2026, 10:54 | 101 | 101 µS/cm |
| 21 Apr 2026, 10:41 | 97 | 97 µS/cm |
| 10 Mar 2026, 12:52 | 97 | 97 µS/cm |
| 19 Feb 2026, 13:36 | 99 | 99 µS/cm |
| 15 Jan 2026, 12:38 | 108 | 108 µS/cm |
| 18 Dec 2025, 12:29 | 91 | 91 µS/cm |
| 18 Nov 2025, 13:21 | 104 | 104 µS/cm |
| 23 Oct 2025, 14:06 | 112 | 112 µS/cm |
| 18 Sep 2025, 14:22 | 114 | 114 µS/cm |
| 22 Aug 2025, 14:33 | 110 | 110 µS/cm |
| 24 Jul 2025, 13:48 | 101 | 101 µS/cm |
| 25 Jun 2025, 14:00 | 96 | 96 µS/cm |
| 24 Apr 2025, 12:41 | 96 | 96 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 | 16 | Apr 2025 – Aug 2026 | 101% 24 Aug 2026 |
| Temperature of Water 0076 | River water | 16 | Apr 2025 – Aug 2026 | 13.3 °C 24 Aug 2026 |
| pH 0061 | River water | 23 | Jan 2024 – Aug 2026 | 5.7 24 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 16 | Apr 2025 – Aug 2026 | 103 µS/cm 24 Aug 2026 |
| Aluminium, Dissolved 6037 | River water | 6 | Jan 2024 – Mar 2024 | 39 µg/l 27 Mar 2024 |
| Barium, Dissolved 9446 | River water | 17 | Apr 2025 – Aug 2026 | below 10 µg/l 24 Aug 2026 |
| Boron, Dissolved 9447 | River water | 17 | Apr 2025 – Aug 2026 | below 100 µg/l 24 Aug 2026 |
| Cadmium 0108 | River water | 17 | Apr 2025 – Aug 2026 | below 0.1 µg/l 24 Aug 2026 |
| Cadmium, Dissolved 0106 | River water | 23 | Jan 2024 – Aug 2026 | below 0.1 µg/l 24 Aug 2026 |
| Calcium, Dissolved 0239 | River water | 23 | Jan 2024 – Aug 2026 | 5.1 mg/l 24 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 23 | Jan 2024 – Aug 2026 | 0.56 mg/l 24 Aug 2026 |
| Chromium, Dissolved 3409 | River water | 6 | Jan 2024 – Mar 2024 | below 0.5 µg/l 27 Mar 2024 |
| Copper 6452 | River water | 17 | Apr 2025 – Aug 2026 | 41 µg/l 24 Aug 2026 |
| Copper, Dissolved 6450 | River water | 23 | Jan 2024 – Aug 2026 | 40 µg/l 24 Aug 2026 |
| Hardness, Total as CaCO3 0158 | River water | 17 | Apr 2025 – Aug 2026 | 21.8 mg/l 24 Aug 2026 |
| Iron, Dissolved 6460 | River water | 17 | Apr 2025 – Aug 2026 | below 30 µg/l 24 Aug 2026 |
| Lead 0050 | River water | 17 | Apr 2025 – Aug 2026 | 4.4 µg/l 24 Aug 2026 |
| Lead, Dissolved 0052 | River water | 23 | Jan 2024 – Aug 2026 | 3.8 µg/l 24 Aug 2026 |
| Lithium, Dissolved 4201 | River water | 17 | Apr 2025 – Aug 2026 | below 100 µg/l 24 Aug 2026 |
| Magnesium, Dissolved 0235 | River water | 23 | Jan 2024 – Aug 2026 | 2.2 mg/l 24 Aug 2026 |
| Manganese, Dissolved 6458 | River water | 17 | Apr 2025 – Aug 2026 | below 10 µg/l 24 Aug 2026 |
| Nickel 6462 | River water | 17 | Apr 2025 – Aug 2026 | below 1 µg/l 24 Aug 2026 |
| Nickel, Dissolved 3410 | River water | 23 | Jan 2024 – Aug 2026 | 1 µg/l 24 Aug 2026 |
| pH : In Situ 3169 | River water | 15 | Jun 2025 – Aug 2026 | 6.83 24 Aug 2026 |
| Potassium, Dissolved 0209 | River water | 17 | Apr 2025 – Aug 2026 | 1.5 mg/l 24 Aug 2026 |
| Sodium, Dissolved 0205 | River water | 17 | Apr 2025 – Aug 2026 | 8.8 mg/l 24 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 17 | Apr 2025 – Aug 2026 | below 3 mg/l 24 Aug 2026 |
| Strontium, Filtered 6693 | River water | 17 | Apr 2025 – Aug 2026 | 21 µg/l 24 Aug 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 17 | Apr 2025 – Aug 2026 | below 10 mg/l 24 Aug 2026 |
| Zinc 6455 | River water | 17 | Apr 2025 – Aug 2026 | 29 µg/l 24 Aug 2026 |
| Zinc, Dissolved 3408 | River water | 23 | Jan 2024 – Aug 2026 | 30 µg/l 24 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.