River Lew downstream of Hatherleigh sewage treatment works
EA name: RIVER LEW D/S HATHERLEIGH STW (also listed as “RIVER LEW (TORRIDGE) BELOW HATHERLEIGH STW”)
Environment Agency sampling point SW-72930813 · 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
- 31 Mar 2025, 10:1818 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
- 16 since 23 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 253780, 104320As published, to the nearest 10 m. Open in a map
- River, by its own name
- Lew
- River, by the map
- River LewPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Dolton On the River Torridge · 9.8 km along the river
- Nearest gauge upstream
- Gribbleford Bridge On the River Lew · 5.3 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (16 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102%
Sampled 31 Mar 2025, 18 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 102 | 102% |
| 25 Feb 2025, 12:58 | 98 | 98% |
| 6 Feb 2025, 11:33 | 99.7 | 99.7% |
| 15 Jan 2025, 11:54 | 100 | 100% |
| 6 Dec 2024, 11:59 | 97.5 | 97.5% |
| 29 Oct 2024, 11:18 | 97.9 | 97.9% |
| 2 Sep 2024, 14:15 | 107 | 107% |
| 1 Aug 2024, 08:36 | 91.6 | 91.6% |
| 2 Jul 2024, 10:02 | 97.8 | 97.8% |
| 5 Jun 2024, 10:12 | 99.3 | 99.3% |
| 8 Mar 2024, 11:07 | 101.5 | 101.5% |
| 1 Feb 2024, 11:33 | 97.5 | 97.5% |
| 2 Jan 2024, 09:40 | 97.4 | 97.4% |
| 6 Dec 2023, 12:19 | 99.7 | 99.7% |
| 14 Nov 2023, 13:24 | 98.1 | 98.1% |
| 23 Oct 2023, 11:47 | 97.3 | 97.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.8 mg/l
Sampled 31 Mar 2025, 18 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 11.8 | 11.8 mg/l |
| 25 Feb 2025, 12:58 | 11.4 | 11.4 mg/l |
| 6 Feb 2025, 11:33 | 12.7 | 12.7 mg/l |
| 15 Jan 2025, 11:54 | 12.2 | 12.2 mg/l |
| 6 Dec 2024, 11:59 | 11.3 | 11.3 mg/l |
| 29 Oct 2024, 11:18 | 10.5 | 10.5 mg/l |
| 2 Sep 2024, 14:15 | 10.3 | 10.3 mg/l |
| 1 Aug 2024, 08:36 | 8.72 | 8.72 mg/l |
| 2 Jul 2024, 10:02 | 9.84 | 9.84 mg/l |
| 5 Jun 2024, 10:12 | 10.5 | 10.5 mg/l |
| 8 Mar 2024, 11:07 | 12.3 | 12.3 mg/l |
| 1 Feb 2024, 11:33 | 11.6 | 11.6 mg/l |
| 2 Jan 2024, 09:40 | 10.9 | 10.9 mg/l |
| 6 Dec 2023, 12:19 | 12.3 | 12.3 mg/l |
| 14 Nov 2023, 13:24 | 10.7 | 10.7 mg/l |
| 23 Oct 2023, 11:47 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
8.9 °C
Sampled 31 Mar 2025, 18 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 8.9 | 8.9 °C |
| 25 Feb 2025, 12:58 | 8.6 | 8.6 °C |
| 6 Feb 2025, 11:33 | 5.1 | 5.1 °C |
| 15 Jan 2025, 11:54 | 6.9 | 6.9 °C |
| 6 Dec 2024, 11:59 | 8.9 | 8.9 °C |
| 29 Oct 2024, 11:18 | 12.3 | 12.3 °C |
| 2 Sep 2024, 14:15 | 17.2 | 17.2 °C |
| 1 Aug 2024, 08:36 | 17.6 | 17.6 °C |
| 2 Jul 2024, 10:02 | 15 | 15 °C |
| 5 Jun 2024, 10:12 | 12.9 | 12.9 °C |
| 8 Mar 2024, 11:07 | 6.9 | 6.9 °C |
| 1 Feb 2024, 11:33 | 7.9 | 7.9 °C |
| 2 Jan 2024, 09:40 | 10.4 | 10.4 °C |
| 6 Dec 2023, 12:19 | 6.3 | 6.3 °C |
| 14 Nov 2023, 13:24 | 11.5 | 11.5 °C |
| 23 Oct 2023, 11:47 | 11.9 | 11.9 °C |
pH
code 0061
7.85
Sampled 31 Mar 2025, 18 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 7.85 | 7.85 |
| 25 Feb 2025, 12:58 | 7.2 | 7.2 |
| 6 Feb 2025, 11:33 | 7.56 | 7.56 |
| 15 Jan 2025, 11:54 | 7.4 | 7.4 |
| 6 Dec 2024, 11:59 | 7.15 | 7.15 |
| 29 Oct 2024, 11:18 | 7.53 | 7.53 |
| 2 Sep 2024, 14:15 | 7.63 | 7.63 |
| 1 Aug 2024, 08:36 | 7.06 | 7.06 |
| 2 Jul 2024, 10:02 | 7.51 | 7.51 |
| 5 Jun 2024, 10:12 | 7.73 | 7.73 |
| 8 Mar 2024, 11:07 | 7.43 | 7.43 |
| 1 Feb 2024, 11:33 | 7.53 | 7.53 |
| 2 Jan 2024, 09:40 | 7.45 | 7.45 |
| 6 Dec 2023, 12:19 | 7.06 | 7.06 |
| 14 Nov 2023, 13:24 | 7.09 | 7.09 |
| 23 Oct 2023, 11:47 | 7.75 | 7.75 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.034 mg/l
Sampled 31 Mar 2025, 18 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 0.034 | 0.034 mg/l |
| 25 Feb 2025, 12:58 | 0.055 | 0.055 mg/l |
| 6 Feb 2025, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jan 2025, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Oct 2024, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Sep 2024, 14:15 | 0.078 | 0.078 mg/l |
| 1 Aug 2024, 08:36 | 0.049 | 0.049 mg/l |
| 2 Jul 2024, 10:02 | 0.11 | 0.11 mg/l |
| 5 Jun 2024, 10:12 | 0.032 | 0.032 mg/l |
| 8 Mar 2024, 11:07 | 0.062 | 0.062 mg/l |
| 1 Feb 2024, 11:33 | 0.036 | 0.036 mg/l |
| 2 Jan 2024, 09:40 | 0.094 | 0.094 mg/l |
| 6 Dec 2023, 12:19 | 0.04 | 0.04 mg/l |
| 14 Nov 2023, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2023, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.4 mg/l
Sampled 31 Mar 2025, 18 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 1.4 | 1.4 mg/l |
| 25 Feb 2025, 12:58 | 1.79 | 1.79 mg/l |
| 6 Feb 2025, 11:33 | 1.5 | 1.5 mg/l |
| 15 Jan 2025, 11:54 | 1.7 | 1.7 mg/l |
| 29 Oct 2024, 11:18 | 0.926 | 0.926 mg/l |
| 2 Sep 2024, 14:15 | 2.69 | 2.69 mg/l |
| 1 Aug 2024, 08:36 | 1.89 | 1.89 mg/l |
| 2 Jul 2024, 10:02 | 2.59 | 2.59 mg/l |
| 5 Jun 2024, 10:12 | 1.59 | 1.59 mg/l |
| 8 Mar 2024, 11:07 | 1.69 | 1.69 mg/l |
| 1 Feb 2024, 11:33 | 1.49 | 1.49 mg/l |
| 2 Jan 2024, 09:40 | 1.29 | 1.29 mg/l |
| 6 Dec 2023, 12:19 | 2.1 | 2.1 mg/l |
| 14 Nov 2023, 13:24 | 1.6 | 1.6 mg/l |
| 23 Oct 2023, 11:47 | 1.4 | 1.4 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.11 mg/l
Sampled 31 Mar 2025, 18 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 0.11 | 0.11 mg/l |
| 25 Feb 2025, 12:58 | 0.027 | 0.027 mg/l |
| 6 Feb 2025, 11:33 | 0.032 | 0.032 mg/l |
| 15 Jan 2025, 11:54 | 0.028 | 0.028 mg/l |
| 29 Oct 2024, 11:18 | 0.047 | 0.047 mg/l |
| 2 Sep 2024, 14:15 | 0.36 | 0.36 mg/l |
| 1 Aug 2024, 08:36 | 0.19 | 0.19 mg/l |
| 2 Jul 2024, 10:02 | 0.3 | 0.3 mg/l |
| 5 Jun 2024, 10:12 | 0.14 | 0.14 mg/l |
| 8 Mar 2024, 11:07 | 0.034 | 0.034 mg/l |
| 1 Feb 2024, 11:33 | 0.038 | 0.038 mg/l |
| 2 Jan 2024, 09:40 | 0.029 | 0.029 mg/l |
| 6 Dec 2023, 12:19 | 0.02 | 0.02 mg/l |
| 14 Nov 2023, 13:24 | 0.022 | 0.022 mg/l |
| 23 Oct 2023, 11:47 | 0.036 | 0.036 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
180 µS/cm
Sampled 31 Mar 2025, 18 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 31 Mar 2025, 10:18 | 180 | 180 µS/cm |
| 25 Feb 2025, 12:58 | 137 | 137 µS/cm |
| 6 Feb 2025, 11:33 | 142 | 142 µS/cm |
| 15 Jan 2025, 11:54 | 150 | 150 µS/cm |
| 6 Dec 2024, 11:59 | 125 | 125 µS/cm |
| 29 Oct 2024, 11:18 | 151 | 151 µS/cm |
| 2 Sep 2024, 14:15 | 222 | 222 µS/cm |
| 1 Aug 2024, 08:36 | 193 | 193 µS/cm |
| 2 Jul 2024, 10:02 | 225 | 225 µS/cm |
| 5 Jun 2024, 10:12 | 181 | 181 µS/cm |
| 8 Mar 2024, 11:07 | 141 | 141 µS/cm |
| 1 Feb 2024, 11:33 | 156 | 156 µS/cm |
| 2 Jan 2024, 09:40 | 129 | 129 µS/cm |
| 6 Dec 2023, 12:19 | 140 | 140 µS/cm |
| 14 Nov 2023, 13:24 | 139 | 139 µS/cm |
| 23 Oct 2023, 11:47 | 150 | 150 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 16 | Oct 2023 – Mar 2025 | 102% 31 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Mar 2025 | 11.8 mg/l 31 Mar 2025 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Mar 2025 | 8.9 °C 31 Mar 2025 |
| pH 0061 | River water | 16 | Oct 2023 – Mar 2025 | 7.85 31 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Mar 2025 | 0.034 mg/l 31 Mar 2025 |
| Nitrate as N 0117 | River water | 15 | Oct 2023 – Mar 2025 | 1.4 mg/l 31 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Oct 2023 – Mar 2025 | 0.11 mg/l 31 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Mar 2025 | 180 µS/cm 31 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Oct 2023 – Mar 2025 | 40 mg/l 31 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Mar 2025 | 0.00041 mg/l 31 Mar 2025 |
| Nitrite as N 0118 | River water | 15 | Oct 2023 – Mar 2025 | 0.005 mg/l 31 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Oct 2023 – Mar 2025 | 1.4 mg/l 31 Mar 2025 |
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.