Red River at Rosewarne Farm
EA name: RED RIVER AT ROSEWARNE FARM
Environment Agency sampling point SW-82310144 · 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, 11:4323 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 31 since 13 Feb 2024 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 164310, 41720As published, to the nearest 10 m. Open in a map
- River, by its own name
- Red
- River, by the map
- Red RiverPlaced on the river its name gives, 104 m from the line.
- Next gauge downstream
- Gwithian On the River Red · 6.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Planned investigation (local monitoring) (1 samples)
Unplanned reactive monitoring (pollution incidents) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.4%
Sampled 8 Sep 2026, 23 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 11:43 | 99.4 | 99.4% |
| 20 Aug 2026, 10:23 | 99.5 | 99.5% |
| 30 Jul 2026, 10:28 | 99.7 | 99.7% |
| 17 Jun 2026, 11:07 | 97.5 | 97.5% |
| 22 May 2026, 10:54 | 99.2 | 99.2% |
| 27 Apr 2026, 10:50 | 98 | 98% |
| 24 Feb 2026, 11:06 | 94.2 | 94.2% |
| 11 Dec 2025, 10:51 | 95.8 | 95.8% |
| 11 Nov 2025, 10:30 | 98.5 | 98.5% |
| 16 Oct 2025, 10:54 | 96.7 | 96.7% |
| 1 Sep 2025, 10:01 | 96.9 | 96.9% |
| 20 Aug 2025, 10:53 | 96.1 | 96.1% |
| 15 Jul 2025, 10:37 | 98.6 | 98.6% |
| 26 Jun 2025, 10:17 | 96.1 | 96.1% |
| 28 May 2025, 11:00 | 103.2 | 103.2% |
| 16 Apr 2025, 11:05 | 99 | 99% |
| 18 Mar 2025, 10:40 | 98.3 | 98.3% |
| 19 Feb 2025, 10:01 | 98.1 | 98.1% |
| 16 Jan 2025, 10:20 | 98.9 | 98.9% |
| 19 Dec 2024, 10:00 | 96.7 | 96.7% |
| 27 Nov 2024, 09:54 | 99.7 | 99.7% |
| 23 Oct 2024, 10:15 | 96.6 | 96.6% |
| 25 Sep 2024, 10:50 | 98.5 | 98.5% |
| 15 Aug 2024, 10:15 | 97.8 | 97.8% |
| 17 Jul 2024, 10:22 | 96.9 | 96.9% |
| 17 Jun 2024, 09:52 | 97 | 97% |
| 15 May 2024, 10:20 | 96.9 | 96.9% |
| 15 Apr 2024, 10:00 | 96.6 | 96.6% |
Water temperature
code 0076 · °C
16.6 °C
Sampled 8 Sep 2026, 23 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 11:43 | 16.6 | 16.6 °C |
| 20 Aug 2026, 10:23 | 18.4 | 18.4 °C |
| 30 Jul 2026, 10:28 | 20.1 | 20.1 °C |
| 17 Jun 2026, 11:07 | 18 | 18 °C |
| 22 May 2026, 10:54 | 15.1 | 15.1 °C |
| 27 Apr 2026, 10:50 | 16 | 16 °C |
| 24 Feb 2026, 11:06 | 14.1 | 14.1 °C |
| 11 Dec 2025, 10:51 | 13.6 | 13.6 °C |
| 11 Nov 2025, 10:30 | 13.9 | 13.9 °C |
| 16 Oct 2025, 10:54 | 17.1 | 17.1 °C |
| 1 Sep 2025, 10:01 | 16.8 | 16.8 °C |
| 20 Aug 2025, 10:53 | 18.7 | 18.7 °C |
| 15 Jul 2025, 10:37 | 20.4 | 20.4 °C |
| 26 Jun 2025, 10:17 | 18.9 | 18.9 °C |
| 28 May 2025, 11:00 | 15.4 | 15.4 °C |
| 16 Apr 2025, 11:05 | 11.1 | 11.1 °C |
| 18 Mar 2025, 10:40 | 15.1 | 15.1 °C |
| 19 Feb 2025, 10:01 | 15 | 15 °C |
| 16 Jan 2025, 10:20 | 13.3 | 13.3 °C |
| 19 Dec 2024, 10:00 | 13.9 | 13.9 °C |
| 27 Nov 2024, 09:54 | 13.3 | 13.3 °C |
| 23 Oct 2024, 10:15 | 14.2 | 14.2 °C |
| 25 Sep 2024, 10:50 | 15.7 | 15.7 °C |
| 15 Aug 2024, 10:15 | 18.1 | 18.1 °C |
| 17 Jul 2024, 10:22 | 17.3 | 17.3 °C |
| 17 Jun 2024, 09:52 | 16 | 16 °C |
| 15 May 2024, 10:20 | 15.6 | 15.6 °C |
| 15 Apr 2024, 10:00 | 13.8 | 13.8 °C |
| 19 Mar 2024, 10:15 | 14.3 | 14.3 °C |
pH
code 0061
7.43
Sampled 8 Sep 2026, 23 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 11:43 | 7.43 | 7.43 |
| 20 Aug 2026, 10:23 | 7.46 | 7.46 |
| 30 Jul 2026, 10:28 | 7.27 | 7.27 |
| 17 Jun 2026, 11:07 | 7.2 | 7.2 |
| 22 May 2026, 10:54 | 7.22 | 7.22 |
| 27 Apr 2026, 10:50 | 7.08 | 7.08 |
| 24 Feb 2026, 11:06 | 6.74 | 6.74 |
| 11 Dec 2025, 10:51 | 6.77 | 6.77 |
| 11 Nov 2025, 10:30 | 7 | 7 |
| 16 Oct 2025, 10:54 | 7.01 | 7.01 |
| 1 Sep 2025, 10:01 | 7.31 | 7.31 |
| 20 Aug 2025, 10:53 | 7.22 | 7.22 |
| 15 Jul 2025, 10:37 | 7.12 | 7.12 |
| 26 Jun 2025, 10:17 | 7.15 | 7.15 |
| 28 May 2025, 11:00 | 6.97 | 6.97 |
| 16 Apr 2025, 11:05 | 7.24 | 7.24 |
| 18 Mar 2025, 10:40 | 7.06 | 7.06 |
| 19 Feb 2025, 10:01 | 6.97 | 6.97 |
| 16 Jan 2025, 10:20 | 6.88 | 6.88 |
| 19 Dec 2024, 10:00 | 6.98 | 6.98 |
| 27 Nov 2024, 09:54 | 7.01 | 7.01 |
| 23 Oct 2024, 10:15 | 7.04 | 7.04 |
| 25 Sep 2024, 10:50 | 7.12 | 7.12 |
| 15 Aug 2024, 10:15 | 7.13 | 7.13 |
| 17 Jul 2024, 10:22 | 7.08 | 7.08 |
| 17 Jun 2024, 09:52 | 7.16 | 7.16 |
| 15 May 2024, 10:20 | 7.05 | 7.05 |
| 15 Apr 2024, 10:00 | 6.86 | 6.86 |
| 19 Mar 2024, 10:15 | 6.97 | 6.97 |
| 13 Feb 2024, 10:00 | 7.28 | 7.28 |
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 · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2024, 10:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2024, 10:00 | <0.03 | below 0.03 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
482 µS/cm
Sampled 8 Sep 2026, 23 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 11:43 | 482 | 482 µS/cm |
| 20 Aug 2026, 10:23 | 780 | 780 µS/cm |
| 30 Jul 2026, 10:28 | 956 | 956 µS/cm |
| 17 Jun 2026, 11:07 | 822 | 822 µS/cm |
| 22 May 2026, 10:54 | 393 | 393 µS/cm |
| 27 Apr 2026, 10:50 | 209 | 209 µS/cm |
| 24 Feb 2026, 11:06 | 388 | 388 µS/cm |
| 11 Dec 2025, 10:51 | 367 | 367 µS/cm |
| 11 Nov 2025, 10:30 | 294 | 294 µS/cm |
| 16 Oct 2025, 10:54 | 654 | 654 µS/cm |
| 1 Sep 2025, 10:01 | 485 | 485 µS/cm |
| 20 Aug 2025, 10:53 | 623 | 623 µS/cm |
| 15 Jul 2025, 10:37 | 843 | 843 µS/cm |
| 26 Jun 2025, 10:17 | 680 | 680 µS/cm |
| 28 May 2025, 11:00 | 352 | 352 µS/cm |
| 16 Apr 2025, 11:05 | 263 | 263 µS/cm |
| 18 Mar 2025, 10:40 | 510 | 510 µS/cm |
| 19 Feb 2025, 10:01 | 487 | 487 µS/cm |
| 16 Jan 2025, 10:20 | 370 | 370 µS/cm |
| 19 Dec 2024, 10:00 | 438 | 438 µS/cm |
| 27 Nov 2024, 09:54 | 356 | 356 µS/cm |
| 23 Oct 2024, 10:15 | 418 | 418 µS/cm |
| 25 Sep 2024, 10:50 | 365 | 365 µS/cm |
| 15 Aug 2024, 10:15 | 559 | 559 µS/cm |
| 17 Jul 2024, 10:22 | 519 | 519 µS/cm |
| 17 Jun 2024, 09:52 | 491 | 491 µS/cm |
| 15 May 2024, 10:20 | 437 | 437 µS/cm |
| 15 Apr 2024, 10:00 | 364 | 364 µS/cm |
| 19 Mar 2024, 10:15 | 353 | 353 µS/cm |
Everything measured here
58 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 58 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Apr 2024 – Sep 2026 | 99.4% 8 Sep 2026 |
| Temperature of Water 0076 | River water | 29 | Mar 2024 – Sep 2026 | 16.6 °C 8 Sep 2026 |
| pH 0061 | River water | 30 | Feb 2024 – Sep 2026 | 7.43 8 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 2 | Feb 2024 – Mar 2024 | below 0.03 mg/l 19 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 29 | Mar 2024 – Sep 2026 | 482 µS/cm 8 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 2 | Feb 2024 – Mar 2024 | 33 mg/l 19 Mar 2024 |
| Aluminium 6057 | River water | 31 | Feb 2024 – Sep 2026 | 550 µg/l 8 Sep 2026 |
| Aluminium, Dissolved 6037 | River water | 31 | Feb 2024 – Sep 2026 | 37 µg/l 8 Sep 2026 |
| Arsenic 6046 | River water | 31 | Feb 2024 – Sep 2026 | 120 µg/l 8 Sep 2026 |
| Arsenic, Dissolved 6045 | River water | 31 | Feb 2024 – Sep 2026 | 22 µg/l 8 Sep 2026 |
| Barium 6062 | River water | 31 | Feb 2024 – Sep 2026 | 15 µg/l 8 Sep 2026 |
| Barium, Dissolved 9446 | River water | 31 | Feb 2024 – Sep 2026 | 12 µg/l 8 Sep 2026 |
| Boron 6059 | River water | 31 | Feb 2024 – Sep 2026 | 100 µg/l 8 Sep 2026 |
| Boron, Dissolved 9447 | River water | 31 | Feb 2024 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Cadmium 0108 | River water | 31 | Feb 2024 – Sep 2026 | 0.42 µg/l 8 Sep 2026 |
| Cadmium, Dissolved 0106 | River water | 31 | Feb 2024 – Sep 2026 | 0.27 µg/l 8 Sep 2026 |
| Calcium 0241 | River water | 31 | Feb 2024 – Sep 2026 | 40 mg/l 8 Sep 2026 |
| Calcium, Dissolved 0239 | River water | 31 | Feb 2024 – Sep 2026 | 41 mg/l 8 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 31 | Feb 2024 – Sep 2026 | 2.8 mg/l 8 Sep 2026 |
| Chloride 0172 | River water | 2 | Feb 2024 – Mar 2024 | 37 mg/l 19 Mar 2024 |
| Chromium 3164 | River water | 31 | Feb 2024 – Sep 2026 | 0.94 µg/l 8 Sep 2026 |
| Chromium, Dissolved 3409 | River water | 31 | Feb 2024 – Sep 2026 | below 0.5 µg/l 8 Sep 2026 |
| Copper 6452 | River water | 31 | Feb 2024 – Sep 2026 | 400 µg/l 8 Sep 2026 |
| Copper : BLM Bioavailable 4821 | River water | 2 | Feb 2024 – Mar 2024 | 28 µg/l 19 Mar 2024 |
| Copper, Dissolved 6450 | River water | 31 | Feb 2024 – Sep 2026 | 71 µg/l 8 Sep 2026 |
| Hardness, Total as CaCO3 0158 | River water | 31 | Feb 2024 – Sep 2026 | 128 mg/l 8 Sep 2026 |
| Ionic Balance 7044 | River water | 2 | Feb 2024 – Mar 2024 | 1.6% 19 Mar 2024 |
| Iron 6051 | River water | 31 | Feb 2024 – Sep 2026 | 3900 µg/l 8 Sep 2026 |
| Iron, Dissolved 6460 | River water | 31 | Feb 2024 – Sep 2026 | 160 µg/l 8 Sep 2026 |
| Lead 0050 | River water | 2 | Feb 2024 – Mar 2024 | below 2 µg/l 19 Mar 2024 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Feb 2024 – Mar 2024 | 0.13 µg/l 19 Mar 2024 |
| Lead, Dissolved 0052 | River water | 31 | Feb 2024 – Sep 2026 | below 2 µg/l 8 Sep 2026 |
| Lithium 6064 | River water | 31 | Feb 2024 – Sep 2026 | 510 µg/l 8 Sep 2026 |
| Lithium, Dissolved 4201 | River water | 31 | Feb 2024 – Sep 2026 | 510 µg/l 8 Sep 2026 |
| Magnesium 0237 | River water | 31 | Feb 2024 – Sep 2026 | 6.5 mg/l 8 Sep 2026 |
| Magnesium, Dissolved 0235 | River water | 31 | Feb 2024 – Sep 2026 | 6.2 mg/l 8 Sep 2026 |
| Manganese 6050 | River water | 31 | Feb 2024 – Sep 2026 | 190 µg/l 8 Sep 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 2 | Feb 2024 – Mar 2024 | 22 µg/l 19 Mar 2024 |
| Manganese, Dissolved 6458 | River water | 31 | Feb 2024 – Sep 2026 | 110 µg/l 8 Sep 2026 |
| National Grid Reference : Whole : Field report 7434 | River water | 2 | Feb 2024 – Mar 2024 | 1 unitless value 19 Mar 2024 |
| Nickel 6462 | River water | 2 | Feb 2024 – Mar 2024 | 8.7 µg/l 19 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Feb 2024 – Mar 2024 | 4.1 µg/l 19 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 31 | Feb 2024 – Sep 2026 | 4.4 µg/l 8 Sep 2026 |
| Nitrite as N 0118 | River water | 2 | Feb 2024 – Mar 2024 | below 0.004 mg/l 19 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 2 | Feb 2024 – Mar 2024 | 2.6 mg/l 19 Mar 2024 |
| Potassium 0211 | River water | 31 | Feb 2024 – Sep 2026 | 4.5 mg/l 8 Sep 2026 |
| Potassium, Dissolved 0209 | River water | 31 | Feb 2024 – Sep 2026 | 4.5 mg/l 8 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 2 | Feb 2024 – Mar 2024 | 10 mg/l 19 Mar 2024 |
| Sodium 0207 | River water | 31 | Feb 2024 – Sep 2026 | 34 mg/l 8 Sep 2026 |
| Sodium, Dissolved 0205 | River water | 31 | Feb 2024 – Sep 2026 | 36 mg/l 8 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 31 | Feb 2024 – Sep 2026 | 33 mg/l 8 Sep 2026 |
| Strontium 6063 | River water | 31 | Feb 2024 – Sep 2026 | 240 µg/l 8 Sep 2026 |
| Strontium, Filtered 6693 | River water | 31 | Feb 2024 – Sep 2026 | 230 µg/l 8 Sep 2026 |
| Sulphate as SO4 0183 | River water | 31 | Feb 2024 – Sep 2026 | 56 mg/l 8 Sep 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 31 | Feb 2024 – Sep 2026 | 55 mg/l 8 Sep 2026 |
| Zinc 6455 | River water | 31 | Feb 2024 – Sep 2026 | 210 µg/l 8 Sep 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 2 | Feb 2024 – Mar 2024 | 270 µg/l 19 Mar 2024 |
| Zinc, Dissolved 3408 | River water | 31 | Feb 2024 – Sep 2026 | 140 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.