River Waldon at Waldon Bridge
EA name: RIVER WALDON AT WALDON BRIDGE
Environment Agency sampling point SW-72934639 · 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 Mar 2025, 12:3119 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 20 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 236840, 110410As published, to the nearest 10 m. Open in a map
- River, by its own name
- Waldon
- River, by the map
- River WaldonPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Rockhay Bridge On the River Torridge · 24 km along the river
- Nearest gauge upstream
- Bradworthy On the River Waldon · 9.9 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (16 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97%
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 97 | 97% |
| 12 Feb 2025, 11:15 | 97.7 | 97.7% |
| 24 Jan 2025, 12:38 | 96.8 | 96.8% |
| 3 Dec 2024, 13:51 | 96.8 | 96.8% |
| 4 Nov 2024, 11:38 | 95.2 | 95.2% |
| 15 Oct 2024, 10:13 | 96.5 | 96.5% |
| 2 Sep 2024, 12:59 | 93.6 | 93.6% |
| 2 Aug 2024, 14:08 | 96.2 | 96.2% |
| 9 Jul 2024, 09:38 | 93 | 93% |
| 4 Jun 2024, 10:50 | 94.2 | 94.2% |
| 13 Mar 2024, 12:53 | 97.8 | 97.8% |
| 13 Feb 2024, 13:26 | 99.6 | 99.6% |
| 11 Jan 2024, 11:54 | 98.8 | 98.8% |
| 6 Dec 2023, 11:15 | 96.4 | 96.4% |
| 15 Nov 2023, 13:12 | 99.2 | 99.2% |
| 20 Oct 2023, 12:16 | 99.3 | 99.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 12 | 12 mg/l |
| 12 Feb 2025, 11:15 | 12.4 | 12.4 mg/l |
| 24 Jan 2025, 12:38 | 11.6 | 11.6 mg/l |
| 3 Dec 2024, 13:51 | 11.3 | 11.3 mg/l |
| 4 Nov 2024, 11:38 | 10.4 | 10.4 mg/l |
| 15 Oct 2024, 10:13 | 10.3 | 10.3 mg/l |
| 2 Sep 2024, 12:59 | 9.12 | 9.12 mg/l |
| 2 Aug 2024, 14:08 | 9.23 | 9.23 mg/l |
| 9 Jul 2024, 09:38 | 9.5 | 9.5 mg/l |
| 4 Jun 2024, 10:50 | 9.64 | 9.64 mg/l |
| 13 Mar 2024, 12:53 | 10.9 | 10.9 mg/l |
| 13 Feb 2024, 13:26 | 11.5 | 11.5 mg/l |
| 11 Jan 2024, 11:54 | 12.7 | 12.7 mg/l |
| 6 Dec 2023, 11:15 | 11.7 | 11.7 mg/l |
| 15 Nov 2023, 13:12 | 10.9 | 10.9 mg/l |
| 20 Oct 2023, 12:16 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
6.3 °C
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 6.3 | 6.3 °C |
| 12 Feb 2025, 11:15 | 5.2 | 5.2 °C |
| 24 Jan 2025, 12:38 | 7.6 | 7.6 °C |
| 3 Dec 2024, 13:51 | 8.5 | 8.5 °C |
| 4 Nov 2024, 11:38 | 11.2 | 11.2 °C |
| 15 Oct 2024, 10:13 | 12.5 | 12.5 °C |
| 2 Sep 2024, 12:59 | 16.5 | 16.5 °C |
| 2 Aug 2024, 14:08 | 17.2 | 17.2 °C |
| 9 Jul 2024, 09:38 | 14.3 | 14.3 °C |
| 4 Jun 2024, 10:50 | 14.2 | 14.2 °C |
| 13 Mar 2024, 12:53 | 10.4 | 10.4 °C |
| 13 Feb 2024, 13:26 | 9.1 | 9.1 °C |
| 11 Jan 2024, 11:54 | 4.7 | 4.7 °C |
| 6 Dec 2023, 11:15 | 6.9 | 6.9 °C |
| 15 Nov 2023, 13:12 | 10.9 | 10.9 °C |
| 20 Oct 2023, 12:16 | 12.7 | 12.7 °C |
pH
code 0061
7.6
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 7.6 | 7.6 |
| 12 Feb 2025, 11:15 | 7.57 | 7.57 |
| 24 Jan 2025, 12:38 | 7.45 | 7.45 |
| 3 Dec 2024, 13:51 | 7.27 | 7.27 |
| 4 Nov 2024, 11:38 | 7.38 | 7.38 |
| 15 Oct 2024, 10:13 | 7.36 | 7.36 |
| 2 Sep 2024, 12:59 | 7.39 | 7.39 |
| 2 Aug 2024, 14:08 | 7.74 | 7.74 |
| 9 Jul 2024, 09:38 | 7.44 | 7.44 |
| 4 Jun 2024, 10:50 | 7.79 | 7.79 |
| 13 Mar 2024, 12:53 | 7.35 | 7.35 |
| 13 Feb 2024, 13:26 | 7.27 | 7.27 |
| 11 Jan 2024, 11:54 | 7.38 | 7.38 |
| 6 Dec 2023, 11:15 | 7.19 | 7.19 |
| 15 Nov 2023, 13:12 | 7.24 | 7.24 |
| 20 Oct 2023, 12:16 | 7.32 | 7.32 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.12 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 0.12 | 0.12 mg/l |
| 12 Feb 2025, 11:15 | 0.062 | 0.062 mg/l |
| 24 Jan 2025, 12:38 | 0.5 | 0.5 mg/l |
| 3 Dec 2024, 13:51 | 0.065 | 0.065 mg/l |
| 4 Nov 2024, 11:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Oct 2024, 10:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Sep 2024, 12:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Aug 2024, 14:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2024, 09:38 | 0.19 | 0.19 mg/l |
| 4 Jun 2024, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2024, 12:53 | 0.21 | 0.21 mg/l |
| 13 Feb 2024, 13:26 | 0.19 | 0.19 mg/l |
| 11 Jan 2024, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Dec 2023, 11:15 | 0.039 | 0.039 mg/l |
| 15 Nov 2023, 13:12 | 0.038 | 0.038 mg/l |
| 20 Oct 2023, 12:16 | 0.054 | 0.054 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.08 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 3.08 | 3.08 mg/l |
| 12 Feb 2025, 11:15 | 3.38 | 3.38 mg/l |
| 24 Jan 2025, 12:38 | 1.48 | 1.48 mg/l |
| 3 Dec 2024, 13:51 | 3.89 | 3.89 mg/l |
| 4 Nov 2024, 11:38 | 3.18 | 3.18 mg/l |
| 15 Oct 2024, 10:13 | 3.29 | 3.29 mg/l |
| 2 Sep 2024, 12:59 | 2.39 | 2.39 mg/l |
| 2 Aug 2024, 14:08 | 2.79 | 2.79 mg/l |
| 9 Jul 2024, 09:38 | 1.97 | 1.97 mg/l |
| 4 Jun 2024, 10:50 | 2.79 | 2.79 mg/l |
| 13 Mar 2024, 12:53 | 2.87 | 2.87 mg/l |
| 13 Feb 2024, 13:26 | 3.58 | 3.58 mg/l |
| 11 Jan 2024, 11:54 | 3.89 | 3.89 mg/l |
| 6 Dec 2023, 11:15 | 4.69 | 4.69 mg/l |
| 15 Nov 2023, 13:12 | 4.69 | 4.69 mg/l |
| 20 Oct 2023, 12:16 | 3.19 | 3.19 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.041 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 0.041 | 0.041 mg/l |
| 12 Feb 2025, 11:15 | 0.053 | 0.053 mg/l |
| 24 Jan 2025, 12:38 | 0.14 | 0.14 mg/l |
| 3 Dec 2024, 13:51 | 0.04 | 0.04 mg/l |
| 4 Nov 2024, 11:38 | 0.049 | 0.049 mg/l |
| 15 Oct 2024, 10:13 | 0.051 | 0.051 mg/l |
| 2 Sep 2024, 12:59 | 0.12 | 0.12 mg/l |
| 2 Aug 2024, 14:08 | 0.086 | 0.086 mg/l |
| 9 Jul 2024, 09:38 | 0.14 | 0.14 mg/l |
| 4 Jun 2024, 10:50 | 0.1 | 0.1 mg/l |
| 13 Mar 2024, 12:53 | 0.076 | 0.076 mg/l |
| 13 Feb 2024, 13:26 | 0.044 | 0.044 mg/l |
| 11 Jan 2024, 11:54 | 0.027 | 0.027 mg/l |
| 6 Dec 2023, 11:15 | 0.026 | 0.026 mg/l |
| 15 Nov 2023, 13:12 | 0.038 | 0.038 mg/l |
| 20 Oct 2023, 12:16 | 0.06 | 0.06 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
184 µS/cm
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 12:31 | 184 | 184 µS/cm |
| 12 Feb 2025, 11:15 | 179 | 179 µS/cm |
| 24 Jan 2025, 12:38 | 167 | 167 µS/cm |
| 3 Dec 2024, 13:51 | 178 | 178 µS/cm |
| 4 Nov 2024, 11:38 | 176 | 176 µS/cm |
| 15 Oct 2024, 10:13 | 175 | 175 µS/cm |
| 2 Sep 2024, 12:59 | 198 | 198 µS/cm |
| 2 Aug 2024, 14:08 | 192 | 192 µS/cm |
| 9 Jul 2024, 09:38 | 176 | 176 µS/cm |
| 4 Jun 2024, 10:50 | 195 | 195 µS/cm |
| 13 Mar 2024, 12:53 | 165 | 165 µS/cm |
| 13 Feb 2024, 13:26 | 177 | 177 µS/cm |
| 11 Jan 2024, 11:54 | 179 | 179 µS/cm |
| 6 Dec 2023, 11:15 | 187 | 187 µS/cm |
| 15 Nov 2023, 13:12 | 192 | 192 µS/cm |
| 20 Oct 2023, 12:16 | 188 | 188 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 | 97% 17 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Mar 2025 | 12 mg/l 17 Mar 2025 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Mar 2025 | 6.3 °C 17 Mar 2025 |
| pH 0061 | River water | 16 | Oct 2023 – Mar 2025 | 7.6 17 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 16 | Oct 2023 – Mar 2025 | 0.12 mg/l 17 Mar 2025 |
| Nitrate as N 0117 | River water | 16 | Oct 2023 – Mar 2025 | 3.08 mg/l 17 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Oct 2023 – Mar 2025 | 0.041 mg/l 17 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Mar 2025 | 184 µS/cm 17 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Oct 2023 – Mar 2025 | 34 mg/l 17 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 16 | Oct 2023 – Mar 2025 | 0.00067 mg/l 17 Mar 2025 |
| Nitrite as N 0118 | River water | 16 | Oct 2023 – Mar 2025 | 0.024 mg/l 17 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 16 | Oct 2023 – Mar 2025 | 3.1 mg/l 17 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.