River Heddon upstream of Parracombe sewage treatment works
EA name: RIVER HEDDON U/S PARRACOMBE STW (also listed as “RIVER HEDDON ABOVE PARRACOMBE STW”)
Environment Agency sampling point SW-73111266 · 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
- 22 May 2026, 09:494 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 27 since 17 Jun 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 266550, 144950As published, to the nearest 10 m. Open in a map
- River, by its own name
- Heddon
- River, by the map
- River HeddonPlaced on the river its name gives, 14 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.7%
Sampled 22 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 100.7 | 100.7% |
| 14 May 2026, 11:51 | 98.2 | 98.2% |
| 23 Apr 2026, 15:40 | 103.3 | 103.3% |
| 7 Apr 2026, 14:43 | 103 | 103% |
| 23 Mar 2026, 13:34 | 100.4 | 100.4% |
| 2 Mar 2026, 11:15 | 102.9 | 102.9% |
| 16 Feb 2026, 12:05 | 102.1 | 102.1% |
| 6 Feb 2026, 10:50 | 104.7 | 104.7% |
| 19 Jan 2026, 11:46 | 98.9 | 98.9% |
| 13 Jan 2026, 14:17 | 101.3 | 101.3% |
| 15 Dec 2025, 09:26 | 93 | 93% |
| 9 Dec 2025, 11:02 | 98.9 | 98.9% |
| 27 Nov 2025, 12:43 | 101.8 | 101.8% |
| 7 Nov 2025, 13:38 | 98.8 | 98.8% |
| 28 Oct 2025, 09:20 | 100.8 | 100.8% |
| 8 Sep 2025, 12:50 | 99.8 | 99.8% |
| 15 Aug 2025, 12:10 | 98.9 | 98.9% |
| 23 Jul 2025, 09:30 | 94.3 | 94.3% |
| 20 Jun 2025, 13:21 | 100.2 | 100.2% |
| 22 May 2025, 10:45 | 94.4 | 94.4% |
| 8 Apr 2025, 12:05 | 104.4 | 104.4% |
| 25 Mar 2025, 11:42 | 104.9 | 104.9% |
| 21 Feb 2025, 11:23 | 101.5 | 101.5% |
| 30 Jan 2025, 11:08 | 100.8 | 100.8% |
| 26 Nov 2024, 11:29 | 100 | 100% |
| 27 Sep 2024, 12:47 | 101.4 | 101.4% |
| 17 Jun 2024, 12:09 | 101.8 | 101.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.7 mg/l
Sampled 22 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 10.7 | 10.7 mg/l |
| 14 May 2026, 11:51 | 11.2 | 11.2 mg/l |
| 23 Apr 2026, 15:40 | 10.8 | 10.8 mg/l |
| 7 Apr 2026, 14:43 | 10.9 | 10.9 mg/l |
| 23 Mar 2026, 13:34 | 11.2 | 11.2 mg/l |
| 2 Mar 2026, 11:15 | 11.6 | 11.6 mg/l |
| 16 Feb 2026, 12:05 | 12.1 | 12.1 mg/l |
| 6 Feb 2026, 10:50 | 12.1 | 12.1 mg/l |
| 19 Jan 2026, 11:46 | 12.1 | 12.1 mg/l |
| 13 Jan 2026, 14:17 | 11.7 | 11.7 mg/l |
| 15 Dec 2025, 09:26 | 10.6 | 10.6 mg/l |
| 9 Dec 2025, 11:02 | 10.8 | 10.8 mg/l |
| 27 Nov 2025, 12:43 | 11.3 | 11.3 mg/l |
| 7 Nov 2025, 13:38 | 10.6 | 10.6 mg/l |
| 28 Oct 2025, 09:20 | 11.2 | 11.2 mg/l |
| 8 Sep 2025, 12:50 | 10.4 | 10.4 mg/l |
| 15 Aug 2025, 12:10 | 9.69 | 9.69 mg/l |
| 23 Jul 2025, 09:30 | 9.57 | 9.57 mg/l |
| 20 Jun 2025, 13:21 | 9.78 | 9.78 mg/l |
| 22 May 2025, 10:45 | 10.2 | 10.2 mg/l |
| 8 Apr 2025, 12:05 | 11.6 | 11.6 mg/l |
| 25 Mar 2025, 11:42 | 11.8 | 11.8 mg/l |
| 21 Feb 2025, 11:23 | 11.4 | 11.4 mg/l |
| 30 Jan 2025, 11:08 | 12.2 | 12.2 mg/l |
| 26 Nov 2024, 11:29 | 11.5 | 11.5 mg/l |
| 27 Sep 2024, 12:47 | 11.1 | 11.1 mg/l |
| 17 Jun 2024, 12:09 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
12.5 °C
Sampled 22 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 12.5 | 12.5 °C |
| 14 May 2026, 11:51 | 9.5 | 9.5 °C |
| 23 Apr 2026, 15:40 | 13.3 | 13.3 °C |
| 7 Apr 2026, 14:43 | 12.7 | 12.7 °C |
| 23 Mar 2026, 13:34 | 10.6 | 10.6 °C |
| 2 Mar 2026, 11:15 | 9.8 | 9.8 °C |
| 16 Feb 2026, 12:05 | 8 | 8 °C |
| 6 Feb 2026, 10:50 | 8.9 | 8.9 °C |
| 19 Jan 2026, 11:46 | 6.7 | 6.7 °C |
| 13 Jan 2026, 14:17 | 8.8 | 8.8 °C |
| 15 Dec 2025, 09:26 | 9.6 | 9.6 °C |
| 9 Dec 2025, 11:02 | 11.2 | 11.2 °C |
| 27 Nov 2025, 12:43 | 10.7 | 10.7 °C |
| 7 Nov 2025, 13:38 | 12 | 12 °C |
| 28 Oct 2025, 09:20 | 10.7 | 10.7 °C |
| 8 Sep 2025, 12:50 | 13.6 | 13.6 °C |
| 15 Aug 2025, 12:10 | 16.2 | 16.2 °C |
| 23 Jul 2025, 09:30 | 14.6 | 14.6 °C |
| 20 Jun 2025, 13:21 | 16.4 | 16.4 °C |
| 22 May 2025, 10:45 | 11.7 | 11.7 °C |
| 8 Apr 2025, 12:05 | 10.5 | 10.5 °C |
| 25 Mar 2025, 11:42 | 10 | 10 °C |
| 21 Feb 2025, 11:23 | 10 | 10 °C |
| 30 Jan 2025, 11:08 | 7.2 | 7.2 °C |
| 26 Nov 2024, 11:29 | 9.1 | 9.1 °C |
| 27 Sep 2024, 12:47 | 11.1 | 11.1 °C |
| 17 Jun 2024, 12:09 | 14 | 14 °C |
pH
code 0061
7.6
Sampled 22 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 7.6 | 7.6 |
| 14 May 2026, 11:51 | 7.7 | 7.7 |
| 23 Apr 2026, 15:40 | 7.96 | 7.96 |
| 7 Apr 2026, 14:43 | 7.77 | 7.77 |
| 23 Mar 2026, 13:34 | 7.62 | 7.62 |
| 2 Mar 2026, 11:15 | 7.91 | 7.91 |
| 16 Feb 2026, 12:05 | 7.51 | 7.51 |
| 6 Feb 2026, 10:50 | 7.42 | 7.42 |
| 19 Jan 2026, 11:46 | 7.48 | 7.48 |
| 13 Jan 2026, 14:17 | 7.51 | 7.51 |
| 15 Dec 2025, 09:26 | 6.23 | 6.23 |
| 9 Dec 2025, 11:02 | 7.28 | 7.28 |
| 27 Nov 2025, 12:43 | 7.31 | 7.31 |
| 7 Nov 2025, 13:38 | 8.24 | 8.24 |
| 28 Oct 2025, 09:20 | 7.37 | 7.37 |
| 8 Sep 2025, 12:50 | 7.59 | 7.59 |
| 15 Aug 2025, 12:10 | 7.63 | 7.63 |
| 23 Jul 2025, 09:30 | 7.88 | 7.88 |
| 20 Jun 2025, 13:21 | 7.38 | 7.38 |
| 22 May 2025, 10:45 | 7.76 | 7.76 |
| 8 Apr 2025, 12:05 | 7.91 | 7.91 |
| 25 Mar 2025, 11:42 | 7.85 | 7.85 |
| 21 Feb 2025, 11:23 | 7.49 | 7.49 |
| 30 Jan 2025, 11:08 | 7.53 | 7.53 |
| 26 Nov 2024, 11:29 | 7.34 | 7.34 |
| 27 Sep 2024, 12:47 | 7.61 | 7.61 |
| 17 Jun 2024, 12:09 | 7.63 | 7.63 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 22 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 11:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Apr 2026, 15:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Mar 2026, 13:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 11:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Feb 2026, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 10:50 | 0.035 | 0.035 mg/l |
| 19 Jan 2026, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jan 2026, 14:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Dec 2025, 09:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 11:02 | 0.038 | 0.038 mg/l |
| 27 Nov 2025, 12:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2025, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Oct 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Sep 2025, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jul 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2025, 13:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2025, 10:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Mar 2025, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Feb 2025, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2025, 11:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Nov 2024, 11:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Sep 2024, 12:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.566 mg/l
Sampled 22 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 0.566 | 0.566 mg/l |
| 14 May 2026, 11:51 | 0.576 | 0.576 mg/l |
| 23 Apr 2026, 15:40 | 0.606 | 0.606 mg/l |
| 23 Mar 2026, 13:34 | 0.806 | 0.806 mg/l |
| 2 Mar 2026, 11:15 | 0.936 | 0.936 mg/l |
| 16 Feb 2026, 12:05 | 0.966 | 0.966 mg/l |
| 6 Feb 2026, 10:50 | 0.816 | 0.816 mg/l |
| 19 Jan 2026, 11:46 | 0.896 | 0.896 mg/l |
| 13 Jan 2026, 14:17 | 0.766 | 0.766 mg/l |
| 15 Dec 2025, 09:26 | 1.2 | 1.2 mg/l |
| 9 Dec 2025, 11:02 | 0.796 | 0.796 mg/l |
| 27 Nov 2025, 12:43 | 0.766 | 0.766 mg/l |
| 7 Nov 2025, 13:38 | 0.806 | 0.806 mg/l |
| 28 Oct 2025, 09:20 | 0.726 | 0.726 mg/l |
| 8 Sep 2025, 12:50 | 0.396 | 0.396 mg/l |
| 15 Aug 2025, 12:10 | 0.626 | 0.626 mg/l |
| 23 Jul 2025, 09:30 | 0.606 | 0.606 mg/l |
| 20 Jun 2025, 13:21 | 0.576 | 0.576 mg/l |
| 22 May 2025, 10:45 | 0.676 | 0.676 mg/l |
| 8 Apr 2025, 12:05 | 0.666 | 0.666 mg/l |
| 25 Mar 2025, 11:42 | 0.676 | 0.676 mg/l |
| 21 Feb 2025, 11:23 | 0.656 | 0.656 mg/l |
| 30 Jan 2025, 11:08 | 0.996 | 0.996 mg/l |
| 26 Nov 2024, 11:29 | 0.966 | 0.966 mg/l |
| 27 Sep 2024, 12:47 | 0.716 | 0.716 mg/l |
| 17 Jun 2024, 12:09 | 0.546 | 0.546 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.013 mg/l
Sampled 22 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 0.013 | 0.013 mg/l |
| 14 May 2026, 11:51 | 0.028 | 0.028 mg/l |
| 23 Apr 2026, 15:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 23 Mar 2026, 13:34 | 0.017 | 0.017 mg/l |
| 2 Mar 2026, 11:15 | 0.019 | 0.019 mg/l |
| 16 Feb 2026, 12:05 | 0.014 | 0.014 mg/l |
| 6 Feb 2026, 10:50 | 0.023 | 0.023 mg/l |
| 19 Jan 2026, 11:46 | 0.012 | 0.012 mg/l |
| 13 Jan 2026, 14:17 | 0.017 | 0.017 mg/l |
| 15 Dec 2025, 09:26 | 0.033 | 0.033 mg/l |
| 9 Dec 2025, 11:02 | 0.034 | 0.034 mg/l |
| 27 Nov 2025, 12:43 | 0.014 | 0.014 mg/l |
| 7 Nov 2025, 13:38 | 0.011 | 0.011 mg/l |
| 28 Oct 2025, 09:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 8 Sep 2025, 12:50 | 0.011 | 0.011 mg/l |
| 15 Aug 2025, 12:10 | 0.019 | 0.019 mg/l |
| 23 Jul 2025, 09:30 | 0.02 | 0.02 mg/l |
| 20 Jun 2025, 13:21 | 0.013 | 0.013 mg/l |
| 22 May 2025, 10:45 | 0.015 | 0.015 mg/l |
| 8 Apr 2025, 12:05 | <0.01 | below 0.01 mg/l (not detected above this) |
| 25 Mar 2025, 11:42 | <0.01 | below 0.01 mg/l (not detected above this) |
| 21 Feb 2025, 11:23 | 0.041 | 0.041 mg/l |
| 30 Jan 2025, 11:08 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Nov 2024, 11:29 | 0.01 | 0.01 mg/l |
| 27 Sep 2024, 12:47 | 0.016 | 0.016 mg/l |
| 17 Jun 2024, 12:09 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
95 µS/cm
Sampled 22 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 09:49 | 95 | 95 µS/cm |
| 14 May 2026, 11:51 | 103 | 103 µS/cm |
| 23 Apr 2026, 15:40 | 93 | 93 µS/cm |
| 7 Apr 2026, 14:43 | 87 | 87 µS/cm |
| 23 Mar 2026, 13:34 | 92 | 92 µS/cm |
| 2 Mar 2026, 11:15 | 86 | 86 µS/cm |
| 16 Feb 2026, 12:05 | 86 | 86 µS/cm |
| 6 Feb 2026, 10:50 | 86 | 86 µS/cm |
| 19 Jan 2026, 11:46 | 92 | 92 µS/cm |
| 13 Jan 2026, 14:17 | 89 | 89 µS/cm |
| 15 Dec 2025, 09:26 | 86 | 86 µS/cm |
| 9 Dec 2025, 11:02 | 80 | 80 µS/cm |
| 27 Nov 2025, 12:43 | 88 | 88 µS/cm |
| 7 Nov 2025, 13:38 | 95 | 95 µS/cm |
| 28 Oct 2025, 09:20 | 86 | 86 µS/cm |
| 8 Sep 2025, 12:50 | 92 | 92 µS/cm |
| 15 Aug 2025, 12:10 | 116 | 116 µS/cm |
| 23 Jul 2025, 09:30 | 109 | 109 µS/cm |
| 20 Jun 2025, 13:21 | 94 | 94 µS/cm |
| 22 May 2025, 10:45 | 111 | 111 µS/cm |
| 8 Apr 2025, 12:05 | 109 | 109 µS/cm |
| 25 Mar 2025, 11:42 | 104 | 104 µS/cm |
| 21 Feb 2025, 11:23 | 87 | 87 µS/cm |
| 30 Jan 2025, 11:08 | 88 | 88 µS/cm |
| 26 Nov 2024, 11:29 | 83 | 83 µS/cm |
| 27 Sep 2024, 12:47 | 89 | 89 µS/cm |
| 17 Jun 2024, 12:09 | 96 | 96 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Jun 2024 – May 2026 | 100.7% 22 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – May 2026 | 10.7 mg/l 22 May 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – May 2026 | 12.5 °C 22 May 2026 |
| pH 0061 | River water | 27 | Jun 2024 – May 2026 | 7.6 22 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – May 2026 | below 0.03 mg/l 22 May 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – May 2026 | 0.566 mg/l 22 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – May 2026 | 0.013 mg/l 22 May 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – May 2026 | 95 µS/cm 22 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – May 2026 | 23 mg/l 22 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – May 2026 | below 0.00027 mg/l 22 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Jun 2024 – May 2026 | below 1 mg/l 22 May 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – May 2026 | below 0.004 mg/l 22 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – May 2026 | 0.57 mg/l 22 May 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.