Darleyford Stream at Darleyford

EA name: DARLEYFORD STREAM AT DARLEYFORD
Environment Agency sampling point SW-91253453 · 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, 11:4445 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
5 since 21 Apr 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Monitoring (national agency policy)
Where
National Grid 227433, 73070As 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), 1 m from the line.
Next gauge downstream
Pillaton On the River Lynher · 19 km along the river
Why it was sampled
Monitoring (national agency policy) (5 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

101%

Sampled 24 Aug 2026, 45 days ago · 5 results banked

99100101102%20242025202621 Apr 2026, 11:16: 101.6%29 May 2026, 11:22: 100%29 Jun 2026, 11:52: 99.4%15 Jul 2026, 11:51: 100.6%24 Aug 2026, 11:44: 101%
Every result (5)
SampledResult as publishedReads as
24 Aug 2026, 11:44101 101%
15 Jul 2026, 11:51100.6 100.6%
29 Jun 2026, 11:5299.4 99.4%
29 May 2026, 11:22100 100%
21 Apr 2026, 11:16101.6 101.6%

Water temperature

code 0076 · °C

13.4 °C

Sampled 24 Aug 2026, 45 days ago · 5 results banked

10121416°C20242025202621 Apr 2026, 11:16: 10.3 °C29 May 2026, 11:22: 12.9 °C29 Jun 2026, 11:52: 13 °C15 Jul 2026, 11:51: 14.6 °C24 Aug 2026, 11:44: 13.4 °C
Every result (5)
SampledResult as publishedReads as
24 Aug 2026, 11:4413.4 13.4 °C
15 Jul 2026, 11:5114.6 14.6 °C
29 Jun 2026, 11:5213 13 °C
29 May 2026, 11:2212.9 12.9 °C
21 Apr 2026, 11:1610.3 10.3 °C

pH

code 0061

7.3

Sampled 24 Aug 2026, 45 days ago · 5 results banked

6.46.66.877.27.420242025202621 Apr 2026, 11:16: 6.929 May 2026, 11:22: 6.629 Jun 2026, 11:52: 6.815 Jul 2026, 11:51: 6.824 Aug 2026, 11:44: 7.3
Every result (5)
SampledResult as publishedReads as
24 Aug 2026, 11:447.3 7.3
15 Jul 2026, 11:516.8 6.8
29 Jun 2026, 11:526.8 6.8
29 May 2026, 11:226.6 6.6
21 Apr 2026, 11:166.9 6.9

Conductivity

at 25 °C · code 0077 · µS/cm

81 µS/cm

Sampled 24 Aug 2026, 45 days ago · 5 results banked

8080.58181.582µS/cm20242025202621 Apr 2026, 11:16: 80 µS/cm29 May 2026, 11:22: 82 µS/cm29 Jun 2026, 11:52: 80 µS/cm15 Jul 2026, 11:51: 82 µS/cm24 Aug 2026, 11:44: 81 µS/cm
Every result (5)
SampledResult as publishedReads as
24 Aug 2026, 11:4481 81 µS/cm
15 Jul 2026, 11:5182 82 µS/cm
29 Jun 2026, 11:5280 80 µS/cm
29 May 2026, 11:2282 82 µS/cm
21 Apr 2026, 11:1680 80 µS/cm

Everything measured here

29 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 29 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 5 Apr 2026 – Aug 2026 101% 24 Aug 2026
Temperature of Water 0076 River water 5 Apr 2026 – Aug 2026 13.4 °C 24 Aug 2026
pH 0061 River water 5 Apr 2026 – Aug 2026 7.3 24 Aug 2026
Conductivity at 25 C 0077 River water 5 Apr 2026 – Aug 2026 81 µS/cm 24 Aug 2026
Barium, Dissolved 9446 River water 5 Apr 2026 – Aug 2026 below 10 µg/l 24 Aug 2026
Boron, Dissolved 9447 River water 5 Apr 2026 – Aug 2026 below 100 µg/l 24 Aug 2026
Cadmium 0108 River water 5 Apr 2026 – Aug 2026 0.14 µg/l 24 Aug 2026
Cadmium, Dissolved 0106 River water 5 Apr 2026 – Aug 2026 0.13 µg/l 24 Aug 2026
Calcium, Dissolved 0239 River water 5 Apr 2026 – Aug 2026 3.6 mg/l 24 Aug 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 5 Apr 2026 – Aug 2026 0.61 mg/l 24 Aug 2026
Copper 6452 River water 5 Apr 2026 – Aug 2026 140 µg/l 24 Aug 2026
Copper, Dissolved 6450 River water 5 Apr 2026 – Aug 2026 140 µg/l 24 Aug 2026
Hardness, Total as CaCO3 0158 River water 5 Apr 2026 – Aug 2026 13.9 mg/l 24 Aug 2026
Iron, Dissolved 6460 River water 5 Apr 2026 – Aug 2026 below 30 µg/l 24 Aug 2026
Lead 0050 River water 5 Apr 2026 – Aug 2026 below 2 µg/l 24 Aug 2026
Lead, Dissolved 0052 River water 5 Apr 2026 – Aug 2026 below 2 µg/l 24 Aug 2026
Lithium, Dissolved 4201 River water 5 Apr 2026 – Aug 2026 below 100 µg/l 24 Aug 2026
Magnesium, Dissolved 0235 River water 5 Apr 2026 – Aug 2026 1.2 mg/l 24 Aug 2026
Manganese, Dissolved 6458 River water 5 Apr 2026 – Aug 2026 19 µg/l 24 Aug 2026
Nickel 6462 River water 5 Apr 2026 – Aug 2026 below 1 µg/l 24 Aug 2026
Nickel, Dissolved 3410 River water 5 Apr 2026 – Aug 2026 below 1 µg/l 24 Aug 2026
pH : In Situ 3169 River water 5 Apr 2026 – Aug 2026 6.48 24 Aug 2026
Potassium, Dissolved 0209 River water 5 Apr 2026 – Aug 2026 1.5 mg/l 24 Aug 2026
Sodium, Dissolved 0205 River water 5 Apr 2026 – Aug 2026 7.8 mg/l 24 Aug 2026
Solids, Suspended at 105 C 0135 River water 5 Apr 2026 – Aug 2026 below 3 mg/l 24 Aug 2026
Strontium, Filtered 6693 River water 5 Apr 2026 – Aug 2026 below 20 µg/l 24 Aug 2026
Sulphate, Dissolved as SO4 7859 River water 5 Apr 2026 – Aug 2026 below 10 mg/l 24 Aug 2026
Zinc 6455 River water 5 Apr 2026 – Aug 2026 62 µg/l 24 Aug 2026
Zinc, Dissolved 3408 River water 5 Apr 2026 – Aug 2026 65 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.