Red River downstream of Treskillard Stream confluence
EA name: RED RIVER D/S TRESKILLARD STREAM CONF (also listed as “RED RIVER D/S TRESKILLARD STREAM CONFLUENCE”)
Environment Agency sampling point SW-82310183 · 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
- 8 Sep 2026, 14:2223 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 25 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 166692, 39678As published, to the nearest 1 m. Open in a map
- River, by its own name
- Red
- River, by the map
- Red RiverPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Gwithian On the River Red · 10 km along the river
- Why it was sampled
- Monitoring (national agency policy) (35 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.4%
Sampled 8 Sep 2026, 23 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 14:22 | 95.4 | 95.4% |
| 20 Aug 2026, 11:28 | 94.6 | 94.6% |
| 30 Jul 2026, 12:30 | 96.7 | 96.7% |
| 17 Jun 2026, 14:41 | 94.5 | 94.5% |
| 22 May 2026, 12:37 | 95.7 | 95.7% |
| 27 Apr 2026, 13:07 | 95.2 | 95.2% |
| 24 Feb 2026, 14:44 | 93.8 | 93.8% |
| 11 Dec 2025, 12:59 | 92.9 | 92.9% |
| 11 Nov 2025, 13:06 | 93.2 | 93.2% |
| 16 Oct 2025, 13:44 | 93.1 | 93.1% |
| 1 Sep 2025, 12:14 | 90.4 | 90.4% |
| 20 Aug 2025, 13:50 | 92.2 | 92.2% |
| 15 Jul 2025, 13:41 | 95.7 | 95.7% |
| 26 Jun 2025, 12:57 | 92.5 | 92.5% |
| 28 May 2025, 13:01 | 97.1 | 97.1% |
| 16 Apr 2025, 13:00 | 95.7 | 95.7% |
| 18 Mar 2025, 12:45 | 96.9 | 96.9% |
| 19 Feb 2025, 12:14 | 95.8 | 95.8% |
| 16 Jan 2025, 13:40 | 93.6 | 93.6% |
| 19 Dec 2024, 13:24 | 91.8 | 91.8% |
| 27 Nov 2024, 13:00 | 94.4 | 94.4% |
| 23 Oct 2024, 13:45 | 93.9 | 93.9% |
| 25 Sep 2024, 14:25 | 94.6 | 94.6% |
| 15 Aug 2024, 13:35 | 92.8 | 92.8% |
| 17 Jul 2024, 13:50 | 93.2 | 93.2% |
| 17 Jun 2024, 14:00 | 94.3 | 94.3% |
| 15 May 2024, 13:40 | 95.8 | 95.8% |
| 15 Apr 2024, 13:28 | 97.8 | 97.8% |
Water temperature
code 0076 · °C
15.3 °C
Sampled 8 Sep 2026, 23 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 14:22 | 15.3 | 15.3 °C |
| 20 Aug 2026, 11:28 | 15.4 | 15.4 °C |
| 30 Jul 2026, 12:30 | 16 | 16 °C |
| 17 Jun 2026, 14:41 | 14.8 | 14.8 °C |
| 22 May 2026, 12:37 | 14.5 | 14.5 °C |
| 27 Apr 2026, 13:07 | 14.3 | 14.3 °C |
| 24 Feb 2026, 14:44 | 12.3 | 12.3 °C |
| 11 Dec 2025, 12:59 | 11.9 | 11.9 °C |
| 11 Nov 2025, 13:06 | 12.9 | 12.9 °C |
| 16 Oct 2025, 13:44 | 13.1 | 13.1 °C |
| 1 Sep 2025, 12:14 | 14.6 | 14.6 °C |
| 20 Aug 2025, 13:50 | 15.8 | 15.8 °C |
| 15 Jul 2025, 13:41 | 15 | 15 °C |
| 26 Jun 2025, 12:57 | 15.6 | 15.6 °C |
| 28 May 2025, 13:01 | 14.8 | 14.8 °C |
| 16 Apr 2025, 13:00 | 11.2 | 11.2 °C |
| 18 Mar 2025, 12:45 | 10.9 | 10.9 °C |
| 19 Feb 2025, 12:14 | 11.2 | 11.2 °C |
| 16 Jan 2025, 13:40 | 10.8 | 10.8 °C |
| 19 Dec 2024, 13:24 | 10.3 | 10.3 °C |
| 27 Nov 2024, 13:00 | 11 | 11 °C |
| 23 Oct 2024, 13:45 | 12.7 | 12.7 °C |
| 25 Sep 2024, 14:25 | 14 | 14 °C |
| 15 Aug 2024, 13:35 | 15.7 | 15.7 °C |
| 17 Jul 2024, 13:50 | 15.2 | 15.2 °C |
| 17 Jun 2024, 14:00 | 14.3 | 14.3 °C |
| 15 May 2024, 13:40 | 13.9 | 13.9 °C |
| 15 Apr 2024, 13:28 | 12.1 | 12.1 °C |
| 19 Mar 2024, 13:38 | 12.6 | 12.6 °C |
| 13 Feb 2024, 13:10 | 11 | 11 °C |
| 4 Jan 2024, 13:02 | 9.3 | 9.3 °C |
| 15 Dec 2023, 15:08 | 11.7 | 11.7 °C |
| 28 Nov 2023, 15:24 | 11.1 | 11.1 °C |
| 7 Nov 2023, 13:20 | 12.1 | 12.1 °C |
| 25 Oct 2023, 12:42 | 12.4 | 12.4 °C |
pH
code 0061
6.85
Sampled 8 Sep 2026, 23 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 14:22 | 6.85 | 6.85 |
| 20 Aug 2026, 11:28 | 6.69 | 6.69 |
| 30 Jul 2026, 12:30 | 6.6 | 6.6 |
| 17 Jun 2026, 14:41 | 6.6 | 6.6 |
| 22 May 2026, 12:37 | 6.59 | 6.59 |
| 27 Apr 2026, 13:07 | 6.56 | 6.56 |
| 24 Feb 2026, 14:44 | 6.36 | 6.36 |
| 11 Dec 2025, 12:59 | 6.34 | 6.34 |
| 11 Nov 2025, 13:06 | 6.39 | 6.39 |
| 16 Oct 2025, 13:44 | 6.44 | 6.44 |
| 1 Sep 2025, 12:14 | 6.67 | 6.67 |
| 20 Aug 2025, 13:50 | 6.64 | 6.64 |
| 15 Jul 2025, 13:41 | 6.74 | 6.74 |
| 26 Jun 2025, 12:57 | 6.46 | 6.46 |
| 28 May 2025, 13:01 | 6.28 | 6.28 |
| 16 Apr 2025, 13:00 | 6.63 | 6.63 |
| 18 Mar 2025, 12:45 | 6.57 | 6.57 |
| 19 Feb 2025, 12:14 | 6.49 | 6.49 |
| 16 Jan 2025, 13:40 | 6.44 | 6.44 |
| 19 Dec 2024, 13:24 | 6.45 | 6.45 |
| 27 Nov 2024, 13:00 | 6.45 | 6.45 |
| 23 Oct 2024, 13:45 | 6.53 | 6.53 |
| 25 Sep 2024, 14:25 | 6.72 | 6.72 |
| 15 Aug 2024, 13:35 | 6.59 | 6.59 |
| 17 Jul 2024, 13:50 | 6.56 | 6.56 |
| 17 Jun 2024, 14:00 | 6.64 | 6.64 |
| 15 May 2024, 13:40 | 6.62 | 6.62 |
| 15 Apr 2024, 13:28 | 6.48 | 6.48 |
| 19 Mar 2024, 13:38 | 6.56 | 6.56 |
| 13 Feb 2024, 13:10 | 6.58 | 6.58 |
| 4 Jan 2024, 13:02 | 6.46 | 6.46 |
| 15 Dec 2023, 15:08 | 6.46 | 6.46 |
| 28 Nov 2023, 15:24 | 6.48 | 6.48 |
| 7 Nov 2023, 13:20 | 6.68 | 6.68 |
| 25 Oct 2023, 12:42 | 6.78 | 6.78 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 19 Mar 2024, 2.5 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2024, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2024, 13:10 | 0.034 | 0.034 mg/l |
| 15 Dec 2023, 15:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Nov 2023, 15:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2023, 13:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Oct 2023, 12:42 | 0.06 | 0.06 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
201 µS/cm
Sampled 8 Sep 2026, 23 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 14:22 | 201 | 201 µS/cm |
| 20 Aug 2026, 11:28 | 192 | 192 µS/cm |
| 30 Jul 2026, 12:30 | 193 | 193 µS/cm |
| 17 Jun 2026, 14:41 | 186 | 186 µS/cm |
| 22 May 2026, 12:37 | 185 | 185 µS/cm |
| 27 Apr 2026, 13:07 | 188 | 188 µS/cm |
| 24 Feb 2026, 14:44 | 178 | 178 µS/cm |
| 11 Dec 2025, 12:59 | 186 | 186 µS/cm |
| 11 Nov 2025, 13:06 | 186 | 186 µS/cm |
| 16 Oct 2025, 13:44 | 191 | 191 µS/cm |
| 1 Sep 2025, 12:14 | 182 | 182 µS/cm |
| 20 Aug 2025, 13:50 | 194 | 194 µS/cm |
| 15 Jul 2025, 13:41 | 193 | 193 µS/cm |
| 26 Jun 2025, 12:57 | 190 | 190 µS/cm |
| 28 May 2025, 13:01 | 186 | 186 µS/cm |
| 16 Apr 2025, 13:00 | 169 | 169 µS/cm |
| 18 Mar 2025, 12:45 | 188 | 188 µS/cm |
| 19 Feb 2025, 12:14 | 187 | 187 µS/cm |
| 16 Jan 2025, 13:40 | 185 | 185 µS/cm |
| 19 Dec 2024, 13:24 | 189 | 189 µS/cm |
| 27 Nov 2024, 13:00 | 178 | 178 µS/cm |
| 23 Oct 2024, 13:45 | 179 | 179 µS/cm |
| 25 Sep 2024, 14:25 | 177 | 177 µS/cm |
| 15 Aug 2024, 13:35 | 194 | 194 µS/cm |
| 17 Jul 2024, 13:50 | 196 | 196 µS/cm |
| 17 Jun 2024, 14:00 | 193 | 193 µS/cm |
| 15 May 2024, 13:40 | 188 | 188 µS/cm |
| 15 Apr 2024, 13:28 | 184 | 184 µS/cm |
| 19 Mar 2024, 13:38 | 183 | 183 µS/cm |
| 13 Feb 2024, 13:10 | 180 | 180 µS/cm |
| 4 Jan 2024, 13:02 | 154 | 154 µS/cm |
| 15 Dec 2023, 15:08 | 194 | 194 µS/cm |
| 28 Nov 2023, 15:24 | 191 | 191 µS/cm |
| 7 Nov 2023, 13:20 | 186 | 186 µS/cm |
| 25 Oct 2023, 12:42 | 182 | 182 µS/cm |
Everything measured here
57 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 57 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Apr 2024 – Sep 2026 | 95.4% 8 Sep 2026 |
| Temperature of Water 0076 | River water | 35 | Oct 2023 – Sep 2026 | 15.3 °C 8 Sep 2026 |
| pH 0061 | River water | 35 | Oct 2023 – Sep 2026 | 6.85 8 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 6 | Oct 2023 – Mar 2024 | below 0.03 mg/l 19 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 35 | Oct 2023 – Sep 2026 | 201 µS/cm 8 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Oct 2023 – Mar 2024 | 21 mg/l 19 Mar 2024 |
| Aluminium 6057 | River water | 35 | Oct 2023 – Sep 2026 | 230 µg/l 8 Sep 2026 |
| Aluminium, Dissolved 6037 | River water | 34 | Oct 2023 – Sep 2026 | 77 µg/l 8 Sep 2026 |
| Arsenic 6046 | River water | 35 | Oct 2023 – Sep 2026 | 34 µg/l 8 Sep 2026 |
| Arsenic, Dissolved 6045 | River water | 35 | Oct 2023 – Sep 2026 | 21 µg/l 8 Sep 2026 |
| Barium 6062 | River water | 35 | Oct 2023 – Sep 2026 | 16 µg/l 8 Sep 2026 |
| Barium, Dissolved 9446 | River water | 34 | Oct 2023 – Sep 2026 | 15 µg/l 8 Sep 2026 |
| Boron 6059 | River water | 35 | Oct 2023 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Boron, Dissolved 9447 | River water | 34 | Oct 2023 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Cadmium 0108 | River water | 35 | Oct 2023 – Sep 2026 | 0.14 µg/l 8 Sep 2026 |
| Cadmium, Dissolved 0106 | River water | 34 | Oct 2023 – Sep 2026 | 0.12 µg/l 8 Sep 2026 |
| Calcium 0241 | River water | 35 | Oct 2023 – Sep 2026 | 12 mg/l 8 Sep 2026 |
| Calcium, Dissolved 0239 | River water | 34 | Oct 2023 – Sep 2026 | 13 mg/l 8 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 34 | Oct 2023 – Sep 2026 | 4.5 mg/l 8 Sep 2026 |
| Chloride 0172 | River water | 6 | Oct 2023 – Mar 2024 | 23 mg/l 19 Mar 2024 |
| Chromium 3164 | River water | 35 | Oct 2023 – Sep 2026 | below 0.5 µg/l 8 Sep 2026 |
| Chromium, Dissolved 3409 | River water | 34 | Oct 2023 – Sep 2026 | below 0.5 µg/l 8 Sep 2026 |
| Copper 6452 | River water | 35 | Oct 2023 – Sep 2026 | 200 µg/l 8 Sep 2026 |
| Copper : BLM Bioavailable 4821 | River water | 5 | Oct 2023 – Mar 2024 | 47 µg/l 19 Mar 2024 |
| Copper, Dissolved 6450 | River water | 34 | Oct 2023 – Sep 2026 | 140 µg/l 8 Sep 2026 |
| Hardness, Total as CaCO3 0158 | River water | 35 | Oct 2023 – Sep 2026 | 49.7 mg/l 8 Sep 2026 |
| Ionic Balance 7044 | River water | 6 | Oct 2023 – Mar 2024 | -1.19% 19 Mar 2024 |
| Iron 6051 | River water | 35 | Oct 2023 – Sep 2026 | 2000 µg/l 8 Sep 2026 |
| Iron, Dissolved 6460 | River water | 34 | Oct 2023 – Sep 2026 | 510 µg/l 8 Sep 2026 |
| Lead 0050 | River water | 7 | Oct 2023 – Mar 2024 | below 2 µg/l 19 Mar 2024 |
| Lead : BLM Bioavailable 3377 | River water | 5 | Oct 2023 – Mar 2024 | 0.03 µg/l 19 Mar 2024 |
| Lead, Dissolved 0052 | River water | 34 | Oct 2023 – Sep 2026 | below 2 µg/l 8 Sep 2026 |
| Lithium 6064 | River water | 35 | Oct 2023 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Lithium, Dissolved 4201 | River water | 34 | Oct 2023 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Magnesium 0237 | River water | 35 | Oct 2023 – Sep 2026 | 4.3 mg/l 8 Sep 2026 |
| Magnesium, Dissolved 0235 | River water | 34 | Oct 2023 – Sep 2026 | 4.2 mg/l 8 Sep 2026 |
| Manganese 6050 | River water | 35 | Oct 2023 – Sep 2026 | 170 µg/l 8 Sep 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 5 | Oct 2023 – Mar 2024 | 14 µg/l 19 Mar 2024 |
| Manganese, Dissolved 6458 | River water | 34 | Oct 2023 – Sep 2026 | 150 µg/l 8 Sep 2026 |
| Nickel 6462 | River water | 7 | Oct 2023 – Mar 2024 | 5 µg/l 19 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 5 | Oct 2023 – Mar 2024 | 2 µg/l 19 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 34 | Oct 2023 – Sep 2026 | 3.6 µg/l 8 Sep 2026 |
| Nitrite as N 0118 | River water | 6 | Oct 2023 – Mar 2024 | below 0.004 mg/l 19 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 6 | Oct 2023 – Mar 2024 | 2.6 mg/l 19 Mar 2024 |
| Potassium 0211 | River water | 35 | Oct 2023 – Sep 2026 | 3.3 mg/l 8 Sep 2026 |
| Potassium, Dissolved 0209 | River water | 34 | Oct 2023 – Sep 2026 | 3.2 mg/l 8 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 6 | Oct 2023 – Mar 2024 | 6.7 mg/l 19 Mar 2024 |
| Sodium 0207 | River water | 35 | Oct 2023 – Sep 2026 | 16 mg/l 8 Sep 2026 |
| Sodium, Dissolved 0205 | River water | 34 | Oct 2023 – Sep 2026 | 16 mg/l 8 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 34 | Oct 2023 – Sep 2026 | 12 mg/l 8 Sep 2026 |
| Strontium 6063 | River water | 35 | Oct 2023 – Sep 2026 | 73 µg/l 8 Sep 2026 |
| Strontium, Filtered 6693 | River water | 34 | Oct 2023 – Sep 2026 | 70 µg/l 8 Sep 2026 |
| Sulphate as SO4 0183 | River water | 35 | Oct 2023 – Sep 2026 | 25 mg/l 8 Sep 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 34 | Oct 2023 – Sep 2026 | 24 mg/l 8 Sep 2026 |
| Zinc 6455 | River water | 35 | Oct 2023 – Sep 2026 | 55 µg/l 8 Sep 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 5 | Oct 2023 – Mar 2024 | 60 µg/l 19 Mar 2024 |
| Zinc, Dissolved 3408 | River water | 34 | Oct 2023 – Sep 2026 | 51 µg/l 8 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.