Treway tributary of River Fal

EA name: TREWAY TRIB OF RIVER FAL
Environment Agency sampling point SW-81930147 · 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
17 Sep 2026, 11:3321 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
9 since 6 Nov 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) · results completed 1 Oct 2026
Where
National Grid 193719, 50384As published, to the nearest 1 m. Open in a map
River, by its own name
Fal
River, by the map
An unnamed streamOn a small stream traced into the river its name gives, 3 m from the line.
Next gauge downstream
Tregony On the River Fal · 6.7 km along the river
Why it was sampled
Monitoring (national agency policy) (6 samples)
Planned investigation (local monitoring) (3 samples)

Results here were completed a median of 21 days after the sample was taken (14 to 23 days, 4 samples).

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

84.1%

Sampled 17 Sep 2026, 21 days ago · 8 results banked

80859095100%2024202520266 Nov 2024, 13:35: 90.1%10 Dec 2024, 14:15: 92.6%9 Jan 2025, 14:40: 94.5%9 Apr 2026, 11:12: 95.5%14 May 2026, 11:18: 93%25 Jun 2026, 11:35: 87.4%21 Aug 2026, 11:45: 88%17 Sep 2026, 11:33: 84.1%
Every result (8)
SampledResult as publishedReads as
17 Sep 2026, 11:3384.1 84.1%
21 Aug 2026, 11:4588 88%
25 Jun 2026, 11:3587.4 87.4%
14 May 2026, 11:1893 93%
9 Apr 2026, 11:1295.5 95.5%
9 Jan 2025, 14:4094.5 94.5%
10 Dec 2024, 14:1592.6 92.6%
6 Nov 2024, 13:3590.1 90.1%

Water temperature

code 0076 · °C

15.1 °C

Sampled 17 Sep 2026, 21 days ago · 9 results banked

5101520°C2024202520266 Nov 2024, 13:35: 13.2 °C10 Dec 2024, 14:15: 10.1 °C9 Jan 2025, 14:40: 9 °C9 Apr 2026, 11:12: 12 °C14 May 2026, 11:18: 11.6 °C25 Jun 2026, 11:35: 20 °C10 Jul 2026, 10:28: 18.2 °C21 Aug 2026, 11:45: 15.7 °C17 Sep 2026, 11:33: 15.1 °C
Every result (9)
SampledResult as publishedReads as
17 Sep 2026, 11:3315.1 15.1 °C
21 Aug 2026, 11:4515.7 15.7 °C
10 Jul 2026, 10:2818.2 18.2 °C
25 Jun 2026, 11:3520 20 °C
14 May 2026, 11:1811.6 11.6 °C
9 Apr 2026, 11:1212 12 °C
9 Jan 2025, 14:409 9 °C
10 Dec 2024, 14:1510.1 10.1 °C
6 Nov 2024, 13:3513.2 13.2 °C

pH

code 0061

7.3

Sampled 17 Sep 2026, 21 days ago · 9 results banked

6.577.582024202520266 Nov 2024, 13:35: 7.110 Dec 2024, 14:15: 79 Jan 2025, 14:40: 6.99 Apr 2026, 11:12: 7.114 May 2026, 11:18: 7.125 Jun 2026, 11:35: 810 Jul 2026, 10:28: 7.321 Aug 2026, 11:45: 7.417 Sep 2026, 11:33: 7.3
Every result (9)
SampledResult as publishedReads as
17 Sep 2026, 11:337.3 7.3
21 Aug 2026, 11:457.4 7.4
10 Jul 2026, 10:287.3 7.3
25 Jun 2026, 11:358 8
14 May 2026, 11:187.1 7.1
9 Apr 2026, 11:127.1 7.1
9 Jan 2025, 14:406.9 6.9
10 Dec 2024, 14:157 7
6 Nov 2024, 13:357.1 7.1

Conductivity

at 25 °C · code 0077 · µS/cm

239 µS/cm

Sampled 17 Sep 2026, 21 days ago · 9 results banked

225230235240245µS/cm2024202520266 Nov 2024, 13:35: 227 µS/cm10 Dec 2024, 14:15: 226 µS/cm9 Jan 2025, 14:40: 225 µS/cm9 Apr 2026, 11:12: 230 µS/cm14 May 2026, 11:18: 236 µS/cm25 Jun 2026, 11:35: 240 µS/cm10 Jul 2026, 10:28: 241 µS/cm21 Aug 2026, 11:45: 238 µS/cm17 Sep 2026, 11:33: 239 µS/cm
Every result (9)
SampledResult as publishedReads as
17 Sep 2026, 11:33239 239 µS/cm
21 Aug 2026, 11:45238 238 µS/cm
10 Jul 2026, 10:28241 241 µS/cm
25 Jun 2026, 11:35240 240 µS/cm
14 May 2026, 11:18236 236 µS/cm
9 Apr 2026, 11:12230 230 µS/cm
9 Jan 2025, 14:40225 225 µS/cm
10 Dec 2024, 14:15226 226 µS/cm
6 Nov 2024, 13:35227 227 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 8 Nov 2024 – Sep 2026 84.1% 17 Sep 2026
Temperature of Water 0076 River water 9 Nov 2024 – Sep 2026 15.1 °C 17 Sep 2026
pH 0061 River water 9 Nov 2024 – Sep 2026 7.3 17 Sep 2026
Conductivity at 25 C 0077 River water 9 Nov 2024 – Sep 2026 239 µS/cm 17 Sep 2026
Barium, Dissolved 9446 River water 9 Nov 2024 – Sep 2026 below 10 µg/l 17 Sep 2026
Boron, Dissolved 9447 River water 9 Nov 2024 – Sep 2026 below 100 µg/l 17 Sep 2026
Cadmium 0108 River water 9 Nov 2024 – Sep 2026 0.4 µg/l 17 Sep 2026
Cadmium, Dissolved 0106 River water 9 Nov 2024 – Sep 2026 0.32 µg/l 17 Sep 2026
Calcium, Dissolved 0239 River water 9 Nov 2024 – Sep 2026 8.5 mg/l 17 Sep 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 8 Nov 2024 – Sep 2026 1.7 mg/l 17 Sep 2026
Copper 6452 River water 9 Nov 2024 – Sep 2026 1.1 µg/l 17 Sep 2026
Copper, Dissolved 6450 River water 9 Nov 2024 – Sep 2026 1.2 µg/l 17 Sep 2026
Hardness, Total as CaCO3 0158 River water 9 Nov 2024 – Sep 2026 66.5 mg/l 17 Sep 2026
Iron, Dissolved 6460 River water 9 Nov 2024 – Sep 2026 160 µg/l 17 Sep 2026
Lead 0050 River water 9 Nov 2024 – Sep 2026 below 2 µg/l 17 Sep 2026
Lead, Dissolved 0052 River water 9 Nov 2024 – Sep 2026 below 2 µg/l 17 Sep 2026
Lithium, Dissolved 4201 River water 9 Nov 2024 – Sep 2026 below 100 µg/l 17 Sep 2026
Magnesium, Dissolved 0235 River water 9 Nov 2024 – Sep 2026 11 mg/l 17 Sep 2026
Manganese, Dissolved 6458 River water 9 Nov 2024 – Sep 2026 37 µg/l 17 Sep 2026
Nickel 6462 River water 9 Nov 2024 – Sep 2026 2.9 µg/l 17 Sep 2026
Nickel, Dissolved 3410 River water 9 Nov 2024 – Sep 2026 3 µg/l 17 Sep 2026
pH : In Situ 3169 River water 6 Apr 2026 – Sep 2026 7.28 17 Sep 2026
Potassium, Dissolved 0209 River water 9 Nov 2024 – Sep 2026 2.7 mg/l 17 Sep 2026
Sodium, Dissolved 0205 River water 9 Nov 2024 – Sep 2026 17 mg/l 17 Sep 2026
Solids, Suspended at 105 C 0135 River water 9 Nov 2024 – Sep 2026 below 3 mg/l 17 Sep 2026
Strontium, Filtered 6693 River water 9 Nov 2024 – Sep 2026 50 µg/l 17 Sep 2026
Sulphate, Dissolved as SO4 7859 River water 9 Nov 2024 – Sep 2026 22 mg/l 17 Sep 2026
Zinc 6455 River water 9 Nov 2024 – Sep 2026 190 µg/l 17 Sep 2026
Zinc, Dissolved 3408 River water 9 Nov 2024 – Sep 2026 180 µg/l 17 Sep 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.