River Cober at Helston Park G Station
EA name: RIVER COBER AT HELSTON PARK G STN (also listed as “RIVER COBER AT HELSTON PARK GAUGING STATION ABOVE HELSTON STW”)
Environment Agency sampling point SW-82010149 · 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, 10:403 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 8 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 Monitoring (national agency policy)
- Where
- National Grid 165480, 27230As published, to the nearest 10 m. Open in a map
- River, by its own name
- Cober
- River, by the map
- River CoberPlaced on the river its name gives, 32 m from the line.
- Next gauge downstream
- Loe Pool On the River Cober · 1.8 km along the river
- Nearest gauge upstream
- HELSTON COUNTY BRIDGE 0.2 km along the riverHelston County Bridge On the River Cober · 0.2 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (4 samples)
Monitoring (national agency policy) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.5%
Sampled 24 Jul 2024, 2.2 years ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Jul 2024, 09:45 | 96.5 | 96.5% |
| 12 Jul 2024, 09:30 | 101.5 | 101.5% |
| 27 Jun 2024, 10:43 | 97.8 | 97.8% |
| 14 Jun 2024, 12:17 | 98 | 98% |
Water temperature
code 0076 · °C
15.9 °C
Sampled 7 Jul 2026, 3 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 10:40 | 15.9 | 15.9 °C |
| 8 Jun 2026, 10:52 | 13.3 | 13.3 °C |
| 14 May 2026, 10:08 | 10.9 | 10.9 °C |
| 14 Apr 2026, 10:38 | 11.3 | 11.3 °C |
| 24 Jul 2024, 09:45 | 14.7 | 14.7 °C |
| 12 Jul 2024, 09:30 | 13.1 | 13.1 °C |
| 27 Jun 2024, 10:43 | 14.6 | 14.6 °C |
| 14 Jun 2024, 12:17 | 12.7 | 12.7 °C |
pH
code 0061
7.1
Sampled 7 Jul 2026, 3 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 10:40 | 7.1 | 7.1 |
| 8 Jun 2026, 10:52 | 7.1 | 7.1 |
| 14 May 2026, 10:08 | 6.9 | 6.9 |
| 14 Apr 2026, 10:38 | 7 | 7 |
| 24 Jul 2024, 09:45 | 6.95 | 6.95 |
| 12 Jul 2024, 09:30 | 7.15 | 7.15 |
| 27 Jun 2024, 10:43 | 7.2 | 7.2 |
| 14 Jun 2024, 12:17 | 7.1 | 7.1 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.032 mg/l
Sampled 7 Jul 2026, 3 months ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 10:40 | 0.032 | 0.032 mg/l |
| 8 Jun 2026, 10:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 10:08 | 0.039 | 0.039 mg/l |
| 14 Apr 2026, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.037 mg/l
Sampled 7 Jul 2026, 3 months ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 10:40 | 0.037 | 0.037 mg/l |
| 8 Jun 2026, 10:52 | 0.024 | 0.024 mg/l |
| 14 May 2026, 10:08 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Apr 2026, 10:38 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
176 µS/cm
Sampled 7 Jul 2026, 3 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 10:40 | 176 | 176 µS/cm |
| 8 Jun 2026, 10:52 | 166 | 166 µS/cm |
| 14 May 2026, 10:08 | 181 | 181 µS/cm |
| 14 Apr 2026, 10:38 | 169 | 169 µS/cm |
| 24 Jul 2024, 09:45 | 178 | 178 µS/cm |
| 12 Jul 2024, 09:30 | 179 | 179 µS/cm |
| 27 Jun 2024, 10:43 | 185 | 185 µS/cm |
| 14 Jun 2024, 12:17 | 179 | 179 µS/cm |
Everything measured here
55 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 55 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 4 | Jun 2024 – Jul 2024 | 96.5% 24 Jul 2024 |
| Temperature of Water 0076 | River water | 8 | Jun 2024 – Jul 2026 | 15.9 °C 7 Jul 2026 |
| pH 0061 | River water | 8 | Jun 2024 – Jul 2026 | 7.1 7 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 4 | Apr 2026 – Jul 2026 | 0.032 mg/l 7 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 4 | Apr 2026 – Jul 2026 | 0.037 mg/l 7 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 8 | Jun 2024 – Jul 2026 | 176 µS/cm 7 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 4 | Apr 2026 – Jul 2026 | 16 mg/l 7 Jul 2026 |
| Aluminium, Dissolved 6037 | River water | 4 | Jun 2024 – Jul 2024 | 50 µg/l 24 Jul 2024 |
| Barium 6062 | River water | 4 | Apr 2026 – Jul 2026 | below 10 µg/l 7 Jul 2026 |
| Barium, Dissolved 9446 | River water | 4 | Apr 2026 – Jul 2026 | below 10 µg/l 7 Jul 2026 |
| Boron 6059 | River water | 4 | Apr 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Boron, Dissolved 9447 | River water | 4 | Apr 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Cadmium 0108 | River water | 4 | Apr 2026 – Jul 2026 | 0.088 µg/l 7 Jul 2026 |
| Cadmium, Dissolved 0106 | River water | 8 | Jun 2024 – Jul 2026 | 0.083 µg/l 7 Jul 2026 |
| Calcium 0241 | River water | 4 | Apr 2026 – Jul 2026 | 8.4 mg/l 7 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 8 | Jun 2024 – Jul 2026 | 8.6 mg/l 7 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 8 | Jun 2024 – Jul 2026 | 2.1 mg/l 7 Jul 2026 |
| Chloride 0172 | River water | 4 | Apr 2026 – Jul 2026 | 28 mg/l 7 Jul 2026 |
| Chromium 3164 | River water | 4 | Apr 2026 – Jul 2026 | below 0.5 µg/l 7 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 8 | Jun 2024 – Jul 2026 | below 0.5 µg/l 7 Jul 2026 |
| Copper 6452 | River water | 4 | Apr 2026 – Jul 2026 | 7.9 µg/l 7 Jul 2026 |
| Copper : BLM Bioavailable 4821 | River water | 4 | Apr 2026 – Jul 2026 | 0.81 µg/l 7 Jul 2026 |
| Copper, Dissolved 6450 | River water | 8 | Jun 2024 – Jul 2026 | 6.7 µg/l 7 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 8 | Jun 2024 – Jul 2026 | 37.9 mg/l 7 Jul 2026 |
| Ionic Balance 7044 | River water | 4 | Apr 2026 – Jul 2026 | -3.97% 7 Jul 2026 |
| Iron 6051 | River water | 4 | Apr 2026 – Jul 2026 | 250 µg/l 7 Jul 2026 |
| Iron, Dissolved 6460 | River water | 4 | Apr 2026 – Jul 2026 | 150 µg/l 7 Jul 2026 |
| Lead 0050 | River water | 4 | Apr 2026 – Jul 2026 | 0.32 µg/l 7 Jul 2026 |
| Lead : BLM Bioavailable 3377 | River water | 4 | Apr 2026 – Jul 2026 | 0.06 µg/l 7 Jul 2026 |
| Lead, Dissolved 0052 | River water | 8 | Jun 2024 – Jul 2026 | 0.12 µg/l 7 Jul 2026 |
| Lithium 6064 | River water | 4 | Apr 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Lithium, Dissolved 4201 | River water | 4 | Apr 2026 – Jul 2026 | below 100 µg/l 7 Jul 2026 |
| Magnesium 0237 | River water | 4 | Apr 2026 – Jul 2026 | 4 mg/l 7 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 8 | Jun 2024 – Jul 2026 | 4 mg/l 7 Jul 2026 |
| Manganese 6050 | River water | 4 | Apr 2026 – Jul 2026 | 11 µg/l 7 Jul 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 4 | Apr 2026 – Jul 2026 | 2.8 µg/l 7 Jul 2026 |
| Manganese, Dissolved 6458 | River water | 4 | Apr 2026 – Jul 2026 | 11 µg/l 7 Jul 2026 |
| Nickel 6462 | River water | 4 | Apr 2026 – Jul 2026 | 0.81 µg/l 7 Jul 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 4 | Apr 2026 – Jul 2026 | 0.34 µg/l 7 Jul 2026 |
| Nickel, Dissolved 3410 | River water | 8 | Jun 2024 – Jul 2026 | 0.72 µg/l 7 Jul 2026 |
| Nitrite as N 0118 | River water | 4 | Apr 2026 – Jul 2026 | below 0.004 mg/l 7 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 4 | Apr 2026 – Jul 2026 | 3 mg/l 7 Jul 2026 |
| Potassium 0211 | River water | 4 | Apr 2026 – Jul 2026 | 2.8 mg/l 7 Jul 2026 |
| Potassium, Dissolved 0209 | River water | 4 | Apr 2026 – Jul 2026 | 2.8 mg/l 7 Jul 2026 |
| Silica, reactive as SiO2 0182 | River water | 4 | Apr 2026 – Jul 2026 | 6.6 mg/l 7 Jul 2026 |
| Sodium 0207 | River water | 4 | Apr 2026 – Jul 2026 | 15 mg/l 7 Jul 2026 |
| Sodium, Dissolved 0205 | River water | 4 | Apr 2026 – Jul 2026 | 16 mg/l 7 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 4 | Apr 2026 – Jul 2026 | 3.5 mg/l 7 Jul 2026 |
| Strontium 6063 | River water | 4 | Apr 2026 – Jul 2026 | 50 µg/l 7 Jul 2026 |
| Strontium, Filtered 6693 | River water | 4 | Apr 2026 – Jul 2026 | 50 µg/l 7 Jul 2026 |
| Sulphate as SO4 0183 | River water | 4 | Apr 2026 – Jul 2026 | 13 mg/l 7 Jul 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 4 | Apr 2026 – Jul 2026 | 13 mg/l 7 Jul 2026 |
| Zinc 6455 | River water | 4 | Apr 2026 – Jul 2026 | 23 µg/l 7 Jul 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 4 | Apr 2026 – Jul 2026 | 18 µg/l 7 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 8 | Jun 2024 – Jul 2026 | 22 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.