River Fal at Great Downs Wood
EA name: RIVER FAL AT GREAT DOWNS WOOD (also listed as “RSN0675 GREAT DOWNS WOOD”)
Environment Agency sampling point SW-RSN0675 · 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
- 6 Mar 2026, 12:427 months 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
- 9 since 6 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 191530, 44188As published, to the nearest 1 m. Open in a map
- River, by its own name
- Fal
- River, by the map
- River FalPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Nearest gauge upstream
- Tregony On the River Fal · 0.8 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (6 samples)
Monitoring (national agency policy) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.2%
Sampled 6 Mar 2026, 7 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 97.2 | 97.2% |
| 4 Feb 2026, 11:57 | 100.1 | 100.1% |
| 21 Jan 2026, 11:08 | 97.6 | 97.6% |
| 7 Mar 2024, 10:13 | 98.7 | 98.7% |
| 8 Feb 2024, 10:10 | 96.4 | 96.4% |
| 3 Jan 2024, 10:17 | 98 | 98% |
| 5 Dec 2023, 12:45 | 96 | 96% |
| 3 Nov 2023, 13:29 | 99.6 | 99.6% |
| 6 Oct 2023, 11:13 | 90.8 | 90.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11 mg/l
Sampled 6 Mar 2026, 7 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 11 | 11 mg/l |
| 4 Feb 2026, 11:57 | 11.4 | 11.4 mg/l |
| 21 Jan 2026, 11:08 | 11.5 | 11.5 mg/l |
| 7 Mar 2024, 10:13 | 11.3 | 11.3 mg/l |
| 8 Feb 2024, 10:10 | 10.7 | 10.7 mg/l |
| 3 Jan 2024, 10:17 | 10.9 | 10.9 mg/l |
| 5 Dec 2023, 12:45 | 11.1 | 11.1 mg/l |
| 3 Nov 2023, 13:29 | 11 | 11 mg/l |
| 6 Oct 2023, 11:13 | 9.42 | 9.42 mg/l |
Water temperature
code 0076 · °C
9.9 °C
Sampled 6 Mar 2026, 7 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 9.9 | 9.9 °C |
| 4 Feb 2026, 11:57 | 9.6 | 9.6 °C |
| 21 Jan 2026, 11:08 | 8.3 | 8.3 °C |
| 7 Mar 2024, 10:13 | 9.5 | 9.5 °C |
| 8 Feb 2024, 10:10 | 10.6 | 10.6 °C |
| 3 Jan 2024, 10:17 | 10.4 | 10.4 °C |
| 5 Dec 2023, 12:45 | 8.9 | 8.9 °C |
| 3 Nov 2023, 13:29 | 10.9 | 10.9 °C |
| 6 Oct 2023, 11:13 | 13.6 | 13.6 °C |
pH
code 0061
7.22
Sampled 6 Mar 2026, 7 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 7.22 | 7.22 |
| 4 Feb 2026, 11:57 | 7.07 | 7.07 |
| 21 Jan 2026, 11:08 | 7.01 | 7.01 |
| 7 Mar 2024, 10:13 | 7.05 | 7.05 |
| 8 Feb 2024, 10:10 | 7.14 | 7.14 |
| 3 Jan 2024, 10:17 | 7.16 | 7.16 |
| 5 Dec 2023, 12:45 | 7.17 | 7.17 |
| 3 Nov 2023, 13:29 | 7.13 | 7.13 |
| 6 Oct 2023, 11:13 | 7.2 | 7.2 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.023 mg/l
Sampled 6 Mar 2026, 7 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 0.023 | 0.023 mg/l |
| 4 Feb 2026, 11:57 | 0.051 | 0.051 mg/l |
| 21 Jan 2026, 11:08 | 0.092 | 0.092 mg/l |
| 7 Mar 2024, 10:13 | 0.032 | 0.032 mg/l |
| 8 Feb 2024, 10:10 | 0.083 | 0.083 mg/l |
| 3 Jan 2024, 10:17 | 0.061 | 0.061 mg/l |
| 5 Dec 2023, 12:45 | 0.064 | 0.064 mg/l |
| 6 Oct 2023, 11:13 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.49 mg/l
Sampled 6 Mar 2026, 7 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 3.49 | 3.49 mg/l |
| 4 Feb 2026, 11:57 | 3.69 | 3.69 mg/l |
| 21 Jan 2026, 11:08 | 2.19 | 2.19 mg/l |
| 7 Mar 2024, 10:13 | 3.89 | 3.89 mg/l |
| 8 Feb 2024, 10:10 | 2.08 | 2.08 mg/l |
| 3 Jan 2024, 10:17 | 3.89 | 3.89 mg/l |
| 5 Dec 2023, 12:45 | 3.59 | 3.59 mg/l |
| 6 Oct 2023, 11:13 | 2.6 | 2.6 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.03 mg/l
Sampled 6 Mar 2026, 7 months ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 0.03 | 0.03 mg/l |
| 4 Feb 2026, 11:57 | 0.029 | 0.029 mg/l |
| 21 Jan 2026, 11:08 | 0.045 | 0.045 mg/l |
| 7 Mar 2024, 10:13 | 0.028 | 0.028 mg/l |
| 8 Feb 2024, 10:10 | 0.072 | 0.072 mg/l |
| 3 Jan 2024, 10:17 | 0.033 | 0.033 mg/l |
| 5 Dec 2023, 12:45 | 0.023 | 0.023 mg/l |
| 6 Oct 2023, 11:13 | 0.084 | 0.084 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
200 µS/cm
Sampled 6 Mar 2026, 7 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 12:42 | 200 | 200 µS/cm |
| 4 Feb 2026, 11:57 | 206 | 206 µS/cm |
| 21 Jan 2026, 11:08 | 177 | 177 µS/cm |
| 7 Mar 2024, 10:13 | 212 | 212 µS/cm |
| 8 Feb 2024, 10:10 | 181 | 181 µS/cm |
| 3 Jan 2024, 10:17 | 205 | 205 µS/cm |
| 5 Dec 2023, 12:45 | 211 | 211 µS/cm |
| 3 Nov 2023, 13:29 | 157 | 157 µS/cm |
| 6 Oct 2023, 11:13 | 242 | 242 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 9 | Oct 2023 – Mar 2026 | 97.2% 6 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 9 | Oct 2023 – Mar 2026 | 11 mg/l 6 Mar 2026 |
| Temperature of Water 0076 | River water | 9 | Oct 2023 – Mar 2026 | 9.9 °C 6 Mar 2026 |
| pH 0061 | River water | 9 | Oct 2023 – Mar 2026 | 7.22 6 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 8 | Oct 2023 – Mar 2026 | 0.023 mg/l 6 Mar 2026 |
| Nitrate as N 0117 | River water | 8 | Oct 2023 – Mar 2026 | 3.49 mg/l 6 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 8 | Oct 2023 – Mar 2026 | 0.03 mg/l 6 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 9 | Oct 2023 – Mar 2026 | 200 µS/cm 6 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 8 | Oct 2023 – Mar 2026 | 25 mg/l 6 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 8 | Oct 2023 – Mar 2026 | 0.00007 mg/l 6 Mar 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 3 | Jan 2026 – Mar 2026 | 2.2 mg/l 6 Mar 2026 |
| Chloride 0172 | River water | 3 | Jan 2026 – Mar 2026 | 24 mg/l 6 Mar 2026 |
| Flow Type 2896 | River water | 3 | Jan 2026 – Mar 2026 | Moderate Flow 6 Mar 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 1 | Jan 2026 – Jan 2026 | 1 text result 21 Jan 2026 |
| Nitrite as N 0118 | River water | 8 | Oct 2023 – Mar 2026 | 0.0085 mg/l 6 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 8 | Oct 2023 – Mar 2026 | 3.5 mg/l 6 Mar 2026 |
| Phosphorus, Total as P 0348 | River water | 3 | Jan 2026 – Mar 2026 | 0.058 mg/l 6 Mar 2026 |
| Silica, reactive as SiO2 0182 | River water | 3 | Jan 2026 – Mar 2026 | 7.7 mg/l 6 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 3 | Jan 2026 – Mar 2026 | 21 mg/l 6 Mar 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.