Tywardreath Stream at Treesmill
EA name: TYWARDREATH STREAM AT TREESMILL (also listed as “TYWARDREATH STREAM AT TREESMILL D/S TRIB”)
Environment Agency sampling point SW-81610329 · 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
- 11 Aug 2026, 10:5351 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 12 Jan 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 208861, 55326As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tywardreath Stream
- River, by the map
- Not placedIts name gives Tywardreath Stream; the only line close by, 0 m away, is Treesmill Stream and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (18 samples)
Monitoring (national agency policy) (6 samples)
Statutory failures (follow ups at non-designated points) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.1%
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 96.1 | 96.1% |
| 13 Jul 2026, 13:07 | 93.5 | 93.5% |
| 9 Jun 2026, 10:19 | 100.1 | 100.1% |
| 5 May 2026, 15:46 | 94 | 94% |
| 13 Apr 2026, 13:07 | 100.2 | 100.2% |
| 19 Mar 2026, 13:20 | 99.5 | 99.5% |
| 10 Feb 2026, 13:09 | 99.8 | 99.8% |
| 12 Jan 2026, 10:43 | 99.3 | 99.3% |
| 3 Dec 2025, 14:59 | 96.9 | 96.9% |
| 13 Nov 2025, 09:25 | 97.4 | 97.4% |
| 3 Oct 2025, 15:14 | 95.8 | 95.8% |
| 5 Sep 2025, 11:28 | 100.1 | 100.1% |
| 12 Aug 2025, 12:36 | 94.2 | 94.2% |
| 8 Jul 2025, 09:27 | 96 | 96% |
| 9 Jun 2025, 13:53 | 97.5 | 97.5% |
| 13 May 2025, 13:01 | 96.7 | 96.7% |
| 9 Apr 2025, 11:09 | 100 | 100% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.56 mg/l
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 9.56 | 9.56 mg/l |
| 13 Jul 2026, 13:07 | 8.69 | 8.69 mg/l |
| 9 Jun 2026, 10:19 | 10.7 | 10.7 mg/l |
| 5 May 2026, 15:46 | 9.93 | 9.93 mg/l |
| 13 Apr 2026, 13:07 | 10.9 | 10.9 mg/l |
| 19 Mar 2026, 13:20 | 10.6 | 10.6 mg/l |
| 10 Feb 2026, 13:09 | 10.8 | 10.8 mg/l |
| 12 Jan 2026, 10:43 | 10.9 | 10.9 mg/l |
| 3 Dec 2025, 14:59 | 10.6 | 10.6 mg/l |
| 13 Nov 2025, 09:25 | 10.4 | 10.4 mg/l |
| 3 Oct 2025, 15:14 | 9.61 | 9.61 mg/l |
| 5 Sep 2025, 11:28 | 10.4 | 10.4 mg/l |
| 12 Aug 2025, 12:36 | 9.12 | 9.12 mg/l |
| 8 Jul 2025, 09:27 | 9.83 | 9.83 mg/l |
| 9 Jun 2025, 13:53 | 10.2 | 10.2 mg/l |
| 13 May 2025, 13:01 | 9.94 | 9.94 mg/l |
| 9 Apr 2025, 11:09 | 11.1 | 11.1 mg/l |
Water temperature
code 0076 · °C
15.5 °C
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 15.5 | 15.5 °C |
| 13 Jul 2026, 13:07 | 18.8 | 18.8 °C |
| 9 Jun 2026, 10:19 | 12.2 | 12.2 °C |
| 5 May 2026, 15:46 | 12.8 | 12.8 °C |
| 13 Apr 2026, 13:07 | 11.3 | 11.3 °C |
| 19 Mar 2026, 13:20 | 12.6 | 12.6 °C |
| 10 Feb 2026, 13:09 | 11.9 | 11.9 °C |
| 12 Jan 2026, 10:43 | 11.2 | 11.2 °C |
| 3 Dec 2025, 14:59 | 11.3 | 11.3 °C |
| 13 Nov 2025, 09:25 | 12.4 | 12.4 °C |
| 3 Oct 2025, 15:14 | 15.1 | 15.1 °C |
| 5 Sep 2025, 11:28 | 13.7 | 13.7 °C |
| 12 Aug 2025, 12:36 | 16.8 | 16.8 °C |
| 8 Jul 2025, 09:27 | 14.2 | 14.2 °C |
| 9 Jun 2025, 13:53 | 13.4 | 13.4 °C |
| 13 May 2025, 13:01 | 14 | 14 °C |
| 9 Apr 2025, 11:09 | 10.5 | 10.5 °C |
pH
code 0061
7.66
Sampled 11 Aug 2026, 51 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 7.66 | 7.66 |
| 13 Jul 2026, 13:07 | 7.53 | 7.53 |
| 9 Jun 2026, 10:19 | 7.44 | 7.44 |
| 5 May 2026, 15:46 | 7.55 | 7.55 |
| 13 Apr 2026, 13:07 | 7.42 | 7.42 |
| 19 Mar 2026, 13:20 | 7.49 | 7.49 |
| 10 Feb 2026, 13:09 | 7.15 | 7.15 |
| 12 Jan 2026, 10:43 | 7.39 | 7.39 |
| 3 Dec 2025, 14:59 | 7.23 | 7.23 |
| 13 Nov 2025, 09:25 | 7.24 | 7.24 |
| 3 Oct 2025, 15:14 | 7.64 | 7.64 |
| 5 Sep 2025, 11:28 | 7.58 | 7.58 |
| 12 Aug 2025, 12:36 | 7.62 | 7.62 |
| 8 Jul 2025, 09:27 | 7.66 | 7.66 |
| 9 Jun 2025, 13:53 | 7.53 | 7.53 |
| 13 May 2025, 13:01 | 7.48 | 7.48 |
| 9 Apr 2025, 11:09 | 7.67 | 7.67 |
| 27 Mar 2024, 12:30 | 7.3 | 7.3 |
| 14 Mar 2024, 12:19 | 7.35 | 7.35 |
| 14 Feb 2024, 11:54 | 7.3 | 7.3 |
| 7 Feb 2024, 12:00 | 7.24 | 7.24 |
| 23 Jan 2024, 12:19 | 7.26 | 7.26 |
| 12 Jan 2024, 13:19 | 7.18 | 7.18 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jul 2026, 13:07 | 0.031 | 0.031 mg/l |
| 9 Jun 2026, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 May 2026, 15:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 13:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2026, 13:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2026, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jan 2026, 10:43 | 0.096 | 0.096 mg/l |
| 3 Dec 2025, 14:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2025, 09:25 | 0.032 | 0.032 mg/l |
| 3 Oct 2025, 15:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 12:36 | 0.06 | 0.06 mg/l |
| 8 Jul 2025, 09:27 | 0.064 | 0.064 mg/l |
| 9 Jun 2025, 13:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2025, 13:01 | 0.097 | 0.097 mg/l |
| 9 Apr 2025, 11:09 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.88 mg/l
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 5.88 | 5.88 mg/l |
| 13 Jul 2026, 13:07 | 6.16 | 6.16 mg/l |
| 9 Jun 2026, 10:19 | 5.59 | 5.59 mg/l |
| 5 May 2026, 15:46 | 6.29 | 6.29 mg/l |
| 13 Apr 2026, 13:07 | 6.2 | 6.2 mg/l |
| 19 Mar 2026, 13:20 | 6.2 | 6.2 mg/l |
| 10 Feb 2026, 13:09 | 5.89 | 5.89 mg/l |
| 12 Jan 2026, 10:43 | 6.4 | 6.4 mg/l |
| 3 Dec 2025, 14:59 | 6.4 | 6.4 mg/l |
| 13 Nov 2025, 09:25 | 6.2 | 6.2 mg/l |
| 3 Oct 2025, 15:14 | 5.09 | 5.09 mg/l |
| 5 Sep 2025, 11:28 | 5.68 | 5.68 mg/l |
| 12 Aug 2025, 12:36 | 6.48 | 6.48 mg/l |
| 8 Jul 2025, 09:27 | 6.59 | 6.59 mg/l |
| 9 Jun 2025, 13:53 | 6.59 | 6.59 mg/l |
| 13 May 2025, 13:01 | 6.39 | 6.39 mg/l |
| 9 Apr 2025, 11:09 | 7 | 7 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.028 mg/l
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 0.028 | 0.028 mg/l |
| 13 Jul 2026, 13:07 | 0.039 | 0.039 mg/l |
| 9 Jun 2026, 10:19 | 0.036 | 0.036 mg/l |
| 5 May 2026, 15:46 | 0.012 | 0.012 mg/l |
| 13 Apr 2026, 13:07 | 0.025 | 0.025 mg/l |
| 19 Mar 2026, 13:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 10 Feb 2026, 13:09 | 0.024 | 0.024 mg/l |
| 12 Jan 2026, 10:43 | 0.026 | 0.026 mg/l |
| 3 Dec 2025, 14:59 | 0.016 | 0.016 mg/l |
| 13 Nov 2025, 09:25 | 0.018 | 0.018 mg/l |
| 3 Oct 2025, 15:14 | 0.017 | 0.017 mg/l |
| 5 Sep 2025, 11:28 | 0.038 | 0.038 mg/l |
| 12 Aug 2025, 12:36 | 0.031 | 0.031 mg/l |
| 8 Jul 2025, 09:27 | 0.03 | 0.03 mg/l |
| 9 Jun 2025, 13:53 | 0.02 | 0.02 mg/l |
| 13 May 2025, 13:01 | 0.017 | 0.017 mg/l |
| 9 Apr 2025, 11:09 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
276 µS/cm
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 10:53 | 276 | 276 µS/cm |
| 13 Jul 2026, 13:07 | 278 | 278 µS/cm |
| 9 Jun 2026, 10:19 | 257 | 257 µS/cm |
| 5 May 2026, 15:46 | 260 | 260 µS/cm |
| 13 Apr 2026, 13:07 | 255 | 255 µS/cm |
| 19 Mar 2026, 13:20 | 248 | 248 µS/cm |
| 10 Feb 2026, 13:09 | 239 | 239 µS/cm |
| 12 Jan 2026, 10:43 | 254 | 254 µS/cm |
| 3 Dec 2025, 14:59 | 249 | 249 µS/cm |
| 13 Nov 2025, 09:25 | 247 | 247 µS/cm |
| 3 Oct 2025, 15:14 | 254 | 254 µS/cm |
| 5 Sep 2025, 11:28 | 277 | 277 µS/cm |
| 12 Aug 2025, 12:36 | 274 | 274 µS/cm |
| 8 Jul 2025, 09:27 | 271 | 271 µS/cm |
| 9 Jun 2025, 13:53 | 262 | 262 µS/cm |
| 13 May 2025, 13:01 | 261 | 261 µS/cm |
| 9 Apr 2025, 11:09 | 265 | 265 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
480 per 100 ml
Sampled 15 Jun 2026, 4 months ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 10:15 | 480 | 480 per 100 ml |
| 18 Nov 2024, 11:02 | 7600 | 7600 per 100 ml |
| 30 Sep 2024, 08:57 | 3700 | 3700 per 100 ml |
| 25 Sep 2024, 10:40 | 88000 | 88000 per 100 ml |
Everything measured here
33 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 33 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 17 | Apr 2025 – Aug 2026 | 96.1% 11 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 17 | Apr 2025 – Aug 2026 | 9.56 mg/l 11 Aug 2026 |
| Temperature of Water 0076 | River water | 17 | Apr 2025 – Aug 2026 | 15.5 °C 11 Aug 2026 |
| pH 0061 | River water | 23 | Jan 2024 – Aug 2026 | 7.66 11 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 17 | Apr 2025 – Aug 2026 | below 0.03 mg/l 11 Aug 2026 |
| Nitrate as N 0117 | River water | 17 | Apr 2025 – Aug 2026 | 5.88 mg/l 11 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 17 | Apr 2025 – Aug 2026 | 0.028 mg/l 11 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 17 | Apr 2025 – Aug 2026 | 276 µS/cm 11 Aug 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 4 | Sep 2024 – Jun 2026 | 480 per 100 ml 15 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 17 | Apr 2025 – Aug 2026 | 53 mg/l 11 Aug 2026 |
| Aluminium, Dissolved 6037 | River water | 6 | Jan 2024 – Mar 2024 | 15 µg/l 27 Mar 2024 |
| Ammonia un-ionised as N 0119 | River water | 17 | Apr 2025 – Aug 2026 | below 0.00038 mg/l 11 Aug 2026 |
| Bacteroides HF183 primer 5886 | River water | 3 | Sep 2024 – Nov 2024 | Present / 100ml 18 Nov 2024 |
| Bacteroidetes Marker : Human copy number 3820 | River water | 3 | Sep 2024 – Nov 2024 | 2.5 log (10) gene copies / 100ml 18 Nov 2024 |
| Bacteroidetes Marker : Ruminant 4906 | River water | 3 | Sep 2024 – Nov 2024 | Present 18 Nov 2024 |
| Bacteroidetes Marker : Ruminant copy number 3819 | River water | 3 | Sep 2024 – Nov 2024 | 5.9 log (10) gene copies / 100ml 18 Nov 2024 |
| Cadmium, Dissolved 0106 | River water | 6 | Jan 2024 – Mar 2024 | 0.045 µg/l 27 Mar 2024 |
| Calcium, Dissolved 0239 | River water | 6 | Jan 2024 – Mar 2024 | 21 mg/l 27 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 6 | Jan 2024 – Mar 2024 | 1.3 mg/l 27 Mar 2024 |
| Chromium, Dissolved 3409 | River water | 6 | Jan 2024 – Mar 2024 | below 0.5 µg/l 27 Mar 2024 |
| Copper, Dissolved 6450 | River water | 6 | Jan 2024 – Mar 2024 | 0.98 µg/l 27 Mar 2024 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 4 | Sep 2024 – Jun 2026 | 1800 colony forming units / 100ml 15 Jun 2026 |
| Lead, Dissolved 0052 | River water | 6 | Jan 2024 – Mar 2024 | below 0.1 µg/l 27 Mar 2024 |
| Magnesium, Dissolved 0235 | River water | 6 | Jan 2024 – Mar 2024 | 6.6 mg/l 27 Mar 2024 |
| Microbial Source Tracking 4876 | River water | 3 | Sep 2024 – Nov 2024 | 1 text result 18 Nov 2024 |
| MST Filtration 4926 | River water | 4 | Sep 2024 – Jun 2026 | DNA Stored 15 Jun 2026 |
| Nickel, Dissolved 3410 | River water | 6 | Jan 2024 – Mar 2024 | 1 µg/l 27 Mar 2024 |
| Nitrite as N 0118 | River water | 17 | Apr 2025 – Aug 2026 | 0.018 mg/l 11 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 17 | Apr 2025 – Aug 2026 | 5.9 mg/l 11 Aug 2026 |
| Preparation: DNA 5923 | River water | 3 | Sep 2024 – Nov 2024 | Done 18 Nov 2024 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Apr 2026 – Aug 2026 | 6.6 mg/l 11 Aug 2026 |
| Volume of Sample Filtered 4865 | River water | 4 | Sep 2024 – Jun 2026 | 530 millilitre 15 Jun 2026 |
| Zinc, Dissolved 3408 | River water | 6 | Jan 2024 – Mar 2024 | 12 µg/l 27 Mar 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.