Mellangoose Stream upstream of Truthall Wood tributary
EA name: MELLANGOOSE STREAM US TRUTHALL WOOD TRIB (also listed as “MELLANGOOSE STREAM U/S TRUTHALL WOOD TRIBUTARY”)
Environment Agency sampling point SW-82010186 · 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
- 7 Jul 2026, 11:453 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 7 since 14 Jun 2024 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 164506, 29436As published, to the nearest 1 m. Open in a map
- River, by its own name
- Mellangoose Stream
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 3 m from the line.
- Next gauge downstream
- Helston County Bridge On the River Cober · 2.9 km along the riverHELSTON COUNTY BRIDGE 2.9 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.9%
Sampled 7 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:45 | 96.9 | 96.9% |
| 8 Jun 2026, 11:55 | 97.8 | 97.8% |
| 14 May 2026, 11:50 | 98.8 | 98.8% |
| 24 Jul 2024, 12:07 | 96.2 | 96.2% |
| 12 Jul 2024, 10:12 | 101 | 101% |
| 27 Jun 2024, 11:40 | 96.5 | 96.5% |
| 14 Jun 2024, 11:05 | 96.4 | 96.4% |
Water temperature
code 0076 · °C
16.5 °C
Sampled 7 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:45 | 16.5 | 16.5 °C |
| 8 Jun 2026, 11:55 | 13.4 | 13.4 °C |
| 14 May 2026, 11:50 | 12.1 | 12.1 °C |
| 24 Jul 2024, 12:07 | 14 | 14 °C |
| 12 Jul 2024, 10:12 | 12.8 | 12.8 °C |
| 27 Jun 2024, 11:40 | 14.6 | 14.6 °C |
| 14 Jun 2024, 11:05 | 12.5 | 12.5 °C |
pH
code 0061
7.2
Sampled 7 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:45 | 7.2 | 7.2 |
| 8 Jun 2026, 11:55 | 7.2 | 7.2 |
| 14 May 2026, 11:50 | 6.9 | 6.9 |
| 24 Jul 2024, 12:07 | 6.98 | 6.98 |
| 12 Jul 2024, 10:12 | 7.13 | 7.13 |
| 27 Jun 2024, 11:40 | 7.12 | 7.12 |
| 14 Jun 2024, 11:05 | 7.09 | 7.09 |
Conductivity
at 25 °C · code 0077 · µS/cm
239 µS/cm
Sampled 7 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 11:45 | 239 | 239 µS/cm |
| 8 Jun 2026, 11:55 | 235 | 235 µS/cm |
| 14 May 2026, 11:50 | 240 | 240 µS/cm |
| 24 Jul 2024, 12:07 | 249 | 249 µS/cm |
| 12 Jul 2024, 10:12 | 246 | 246 µS/cm |
| 27 Jun 2024, 11:40 | 239 | 239 µS/cm |
| 14 Jun 2024, 11:05 | 248 | 248 µS/cm |
Everything measured here
30 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 30 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 7 | Jun 2024 – Jul 2026 | 96.9% 7 Jul 2026 |
| Temperature of Water 0076 | River water | 7 | Jun 2024 – Jul 2026 | 16.5 °C 7 Jul 2026 |
| pH 0061 | River water | 7 | Jun 2024 – Jul 2026 | 7.2 7 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 7 | Jun 2024 – Jul 2026 | 239 µS/cm 7 Jul 2026 |
| Aluminium, Dissolved 6037 | River water | 4 | Jun 2024 – Jul 2024 | below 20 µg/l 24 Jul 2024 |
| Barium, Dissolved 9446 | River water | 3 | May 2026 – Jul 2026 | 11 µg/l 7 Jul 2026 |
| Boron, Dissolved 9447 | River water | 3 | May 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Cadmium 0108 | River water | 3 | May 2026 – Jul 2026 | 0.54 µg/l 7 Jul 2026 |
| Cadmium, Dissolved 0106 | River water | 7 | Jun 2024 – Jul 2026 | 0.55 µg/l 7 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 7 | Jun 2024 – Jul 2026 | 12 mg/l 7 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 7 | Jun 2024 – Jul 2026 | 0.83 mg/l 7 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 4 | Jun 2024 – Jul 2024 | below 0.5 µg/l 24 Jul 2024 |
| Copper 6452 | River water | 3 | May 2026 – Jul 2026 | 8.3 µg/l 7 Jul 2026 |
| Copper, Dissolved 6450 | River water | 7 | Jun 2024 – Jul 2026 | 7.8 µg/l 7 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 7 | Jun 2024 – Jul 2026 | 58.8 mg/l 7 Jul 2026 |
| Iron, Dissolved 6460 | River water | 3 | May 2026 – Jul 2026 | below 30 µg/l 7 Jul 2026 |
| Lead 0050 | River water | 3 | May 2026 – Jul 2026 | below 2 µg/l 7 Jul 2026 |
| Lead, Dissolved 0052 | River water | 7 | Jun 2024 – Jul 2026 | below 2 µg/l 7 Jul 2026 |
| Lithium, Dissolved 4201 | River water | 3 | May 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 7 | Jun 2024 – Jul 2026 | 7 mg/l 7 Jul 2026 |
| Manganese, Dissolved 6458 | River water | 3 | May 2026 – Jul 2026 | below 10 µg/l 7 Jul 2026 |
| Nickel 6462 | River water | 3 | May 2026 – Jul 2026 | 2.6 µg/l 7 Jul 2026 |
| Nickel, Dissolved 3410 | River water | 7 | Jun 2024 – Jul 2026 | 2.7 µg/l 7 Jul 2026 |
| Potassium, Dissolved 0209 | River water | 3 | May 2026 – Jul 2026 | 2.7 mg/l 7 Jul 2026 |
| Sodium, Dissolved 0205 | River water | 3 | May 2026 – Jul 2026 | 20 mg/l 7 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 3 | May 2026 – Jul 2026 | below 3 mg/l 7 Jul 2026 |
| Strontium, Filtered 6693 | River water | 3 | May 2026 – Jul 2026 | 69 µg/l 7 Jul 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 3 | May 2026 – Jul 2026 | 16 mg/l 7 Jul 2026 |
| Zinc 6455 | River water | 3 | May 2026 – Jul 2026 | 120 µg/l 7 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 7 | Jun 2024 – Jul 2026 | 120 µg/l 7 Jul 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.