River Fowey at Halfway House Bridge
EA name: RIVER FOWEY AT HALFWAY HOUSE BRIDGE
Environment Agency sampling point SW-81520348 · 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
- 12 Feb 2024, 09:462.7 years ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 8 Oct 2026 and had nothing newer.
- Samples banked
- 5 since 2 Oct 2023 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 215968, 65246As published, to the nearest 1 m. Open in a map
- River, by its own name
- Fowey
- River, by the map
- River FoweyPlaced on the river its name gives, 7 m from the line.
- Next gauge downstream
- Wainsford On the River Fowey · 0.8 km along the river
- Nearest gauge upstream
- Craigshill Wood On the St Neot River · 4.2 km along the riverTrekeivesteps On the River Fowey · 12 km along the river
- Why it was sampled
- Monitoring (national agency policy) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.2%
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 96.2 | 96.2% |
| 8 Jan 2024, 12:55 | 101.3 | 101.3% |
| 6 Dec 2023, 10:15 | 101.9 | 101.9% |
| 3 Nov 2023, 11:13 | 100 | 100% |
| 2 Oct 2023, 13:54 | 100.3 | 100.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.5 mg/l
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 11.5 | 11.5 mg/l |
| 8 Jan 2024, 12:55 | 12.2 | 12.2 mg/l |
| 6 Dec 2023, 10:15 | 12.4 | 12.4 mg/l |
| 3 Nov 2023, 11:13 | 11.1 | 11.1 mg/l |
| 2 Oct 2023, 13:54 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
7.5 °C
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 7.5 | 7.5 °C |
| 8 Jan 2024, 12:55 | 7.1 | 7.1 °C |
| 6 Dec 2023, 10:15 | 6.9 | 6.9 °C |
| 3 Nov 2023, 11:13 | 10.8 | 10.8 °C |
| 2 Oct 2023, 13:54 | 14.7 | 14.7 °C |
pH
code 0061
7.26
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 7.26 | 7.26 |
| 8 Jan 2024, 12:55 | 7.14 | 7.14 |
| 6 Dec 2023, 10:15 | 7.65 | 7.65 |
| 3 Nov 2023, 11:13 | 7.57 | 7.57 |
| 2 Oct 2023, 13:54 | 6.83 | 6.83 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.005 mg/l
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 0.005 | 0.005 mg/l |
| 8 Jan 2024, 12:55 | 0.0045 | 0.0045 mg/l |
| 6 Dec 2023, 10:15 | 0.0038 | 0.0038 mg/l |
| 3 Nov 2023, 11:13 | 0.0053 | 0.0053 mg/l |
| 2 Oct 2023, 13:54 | 0.0096 | 0.0096 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.5 mg/l
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 1.5 | 1.5 mg/l |
| 8 Jan 2024, 12:55 | 1.5 | 1.5 mg/l |
| 6 Dec 2023, 10:15 | 1.8 | 1.8 mg/l |
| 3 Nov 2023, 11:13 | 1.9 | 1.9 mg/l |
| 2 Oct 2023, 13:54 | 1.2 | 1.2 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.008 mg/l
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 0.008 | 0.008 mg/l |
| 8 Jan 2024, 12:55 | 0.0083 | 0.0083 mg/l |
| 6 Dec 2023, 10:15 | 0.007 | 0.007 mg/l |
| 3 Nov 2023, 11:13 | 0.013 | 0.013 mg/l |
| 2 Oct 2023, 13:54 | 0.012 | 0.012 mg/l |
Turbidity
code 6396 · NTU
below 1 NTU (not detected above this)
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | <1 | below 1 NTU (not detected above this) |
| 8 Jan 2024, 12:55 | 1.2 | 1.2 NTU |
| 6 Dec 2023, 10:15 | 1.2 | 1.2 NTU |
| 3 Nov 2023, 11:13 | 3.7 | 3.7 NTU |
| 2 Oct 2023, 13:54 | 1 | 1 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
103 µS/cm
Sampled 12 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Feb 2024, 09:46 | 103 | 103 µS/cm |
| 8 Jan 2024, 12:55 | 98 | 98 µS/cm |
| 6 Dec 2023, 10:15 | 125 | 125 µS/cm |
| 3 Nov 2023, 11:13 | 119 | 119 µS/cm |
| 2 Oct 2023, 13:54 | 103 | 103 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 5 | Oct 2023 – Feb 2024 | 96.2% 12 Feb 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 5 | Oct 2023 – Feb 2024 | 11.5 mg/l 12 Feb 2024 |
| Temperature of Water 0076 | River water | 5 | Oct 2023 – Feb 2024 | 7.5 °C 12 Feb 2024 |
| pH 0061 | River water | 5 | Oct 2023 – Feb 2024 | 7.26 12 Feb 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 5 | Oct 2023 – Feb 2024 | 0.005 mg/l 12 Feb 2024 |
| Nitrate as N 0117 | River water | 5 | Oct 2023 – Feb 2024 | 1.5 mg/l 12 Feb 2024 |
| Orthophosphate, reactive as P 0180 | River water | 5 | Oct 2023 – Feb 2024 | 0.008 mg/l 12 Feb 2024 |
| Turbidity 6396 | River water | 5 | Oct 2023 – Feb 2024 | below 1 NTU 12 Feb 2024 |
| Conductivity at 25 C 0077 | River water | 5 | Oct 2023 – Feb 2024 | 103 µS/cm 12 Feb 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 5 | Oct 2023 – Feb 2024 | 12 mg/l 12 Feb 2024 |
| Ammonia un-ionised as N 0119 | River water | 5 | Oct 2023 – Feb 2024 | 0.00001 mg/l 12 Feb 2024 |
| Chlorophyll : Acetone Extract 7887 | River water | 5 | Oct 2023 – Feb 2024 | 1 µg/l 12 Feb 2024 |
| Nitrite as N 0118 | River water | 5 | Oct 2023 – Feb 2024 | below 0.001 mg/l 12 Feb 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 5 | Oct 2023 – Feb 2024 | 1.5 mg/l 12 Feb 2024 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Oct 2023 – Feb 2024 | 4.9 mg/l 12 Feb 2024 |
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.