River Blyth Holton Bridge
EA name: R.BLYTH HOLTON BRIDGE
Environment Agency sampling point AN-BLY030 · 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
- 21 Aug 2026, 11:1941 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 25 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 640596, 276873As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blyth
- River, by the map
- River BlythPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Nearest gauge upstream
- Huntingfield On the Huntingfield Watercourse · 10 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
49.4%
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 49.4 | 49.4% |
| 1 Jul 2026, 13:11 | 61.5 | 61.5% |
| 2 Jun 2026, 10:54 | 45.3 | 45.3% |
| 6 May 2026, 10:27 | 55.3 | 55.3% |
| 13 Apr 2026, 13:25 | 84 | 84% |
| 6 Mar 2026, 10:42 | 90 | 90% |
| 2 Feb 2026, 12:34 | 96 | 96% |
| 12 Jan 2026, 13:09 | 96.3 | 96.3% |
| 4 Dec 2025, 14:17 | 92.5 | 92.5% |
| 11 Nov 2025, 09:29 | 44.7 | 44.7% |
| 14 Oct 2025, 09:35 | 58.7 | 58.7% |
| 3 Sep 2025, 11:52 | 61.4 | 61.4% |
| 12 Aug 2025, 11:30 | 98.3 | 98.3% |
| 24 Jul 2025, 12:00 | 68.2 | 68.2% |
| 23 Jun 2025, 12:00 | 72.8 | 72.8% |
| 30 May 2025, 12:12 | 62.2 | 62.2% |
| 24 Apr 2025, 10:20 | 77.4 | 77.4% |
| 4 Mar 2025, 09:30 | 91 | 91% |
| 14 Feb 2025, 11:44 | 94.2 | 94.2% |
| 28 Jan 2025, 10:22 | 92.8 | 92.8% |
| 4 Dec 2024, 09:20 | 89.9 | 89.9% |
| 19 Nov 2024, 11:03 | 78.8 | 78.8% |
| 16 Oct 2024, 13:44 | 72.4 | 72.4% |
| 26 Sep 2024, 11:08 | 63.6 | 63.6% |
| 21 Aug 2024, 13:08 | 72.6 | 72.6% |
| 24 Jul 2024, 11:31 | 69.9 | 69.9% |
| 25 Jun 2024, 10:03 | 60.2 | 60.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.87 mg/l
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 4.87 | 4.87 mg/l |
| 1 Jul 2026, 13:11 | 5.9 | 5.9 mg/l |
| 2 Jun 2026, 10:54 | 4.47 | 4.47 mg/l |
| 6 May 2026, 10:27 | 5.93 | 5.93 mg/l |
| 13 Apr 2026, 13:25 | 9.4 | 9.4 mg/l |
| 6 Mar 2026, 10:42 | 10.6 | 10.6 mg/l |
| 2 Feb 2026, 12:34 | 11.8 | 11.8 mg/l |
| 12 Jan 2026, 13:09 | 12.1 | 12.1 mg/l |
| 4 Dec 2025, 14:17 | 11.2 | 11.2 mg/l |
| 11 Nov 2025, 09:29 | 4.94 | 4.94 mg/l |
| 14 Oct 2025, 09:35 | 6.16 | 6.16 mg/l |
| 3 Sep 2025, 11:52 | 5.98 | 5.98 mg/l |
| 12 Aug 2025, 11:30 | 9.23 | 9.23 mg/l |
| 24 Jul 2025, 12:00 | 6.53 | 6.53 mg/l |
| 23 Jun 2025, 12:00 | 7.2 | 7.2 mg/l |
| 30 May 2025, 12:12 | 6.03 | 6.03 mg/l |
| 24 Apr 2025, 10:20 | 8.44 | 8.44 mg/l |
| 4 Mar 2025, 09:30 | 11.8 | 11.8 mg/l |
| 14 Feb 2025, 11:44 | 12.1 | 12.1 mg/l |
| 28 Jan 2025, 10:22 | 11.4 | 11.4 mg/l |
| 4 Dec 2024, 09:20 | 11.2 | 11.2 mg/l |
| 19 Nov 2024, 11:03 | 9.48 | 9.48 mg/l |
| 16 Oct 2024, 13:44 | 7.53 | 7.53 mg/l |
| 26 Sep 2024, 11:08 | 6.48 | 6.48 mg/l |
| 21 Aug 2024, 13:08 | 7.12 | 7.12 mg/l |
| 24 Jul 2024, 11:31 | 6.91 | 6.91 mg/l |
| 25 Jun 2024, 10:03 | 5.96 | 5.96 mg/l |
Water temperature
code 0076 · °C
15.9 °C
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 15.9 | 15.9 °C |
| 1 Jul 2026, 13:11 | 17.2 | 17.2 °C |
| 2 Jun 2026, 10:54 | 15.9 | 15.9 °C |
| 6 May 2026, 10:27 | 12.1 | 12.1 °C |
| 13 Apr 2026, 13:25 | 10.3 | 10.3 °C |
| 6 Mar 2026, 10:42 | 8.1 | 8.1 °C |
| 2 Feb 2026, 12:34 | 6.5 | 6.5 °C |
| 12 Jan 2026, 13:09 | 5.5 | 5.5 °C |
| 4 Dec 2025, 14:17 | 7.1 | 7.1 °C |
| 11 Nov 2025, 09:29 | 10.8 | 10.8 °C |
| 14 Oct 2025, 09:35 | 13.1 | 13.1 °C |
| 3 Sep 2025, 11:52 | 16.5 | 16.5 °C |
| 12 Aug 2025, 11:30 | 18.3 | 18.3 °C |
| 24 Jul 2025, 12:00 | 17.3 | 17.3 °C |
| 23 Jun 2025, 12:00 | 15.8 | 15.8 °C |
| 30 May 2025, 12:12 | 16.7 | 16.7 °C |
| 24 Apr 2025, 10:20 | 11.4 | 11.4 °C |
| 4 Mar 2025, 09:30 | 4.4 | 4.4 °C |
| 14 Feb 2025, 11:44 | 4.6 | 4.6 °C |
| 28 Jan 2025, 10:22 | 6.4 | 6.4 °C |
| 4 Dec 2024, 09:20 | 5.9 | 5.9 °C |
| 19 Nov 2024, 11:03 | 7.3 | 7.3 °C |
| 16 Oct 2024, 13:44 | 13.5 | 13.5 °C |
| 26 Sep 2024, 11:08 | 14.4 | 14.4 °C |
| 21 Aug 2024, 13:08 | 16.2 | 16.2 °C |
| 24 Jul 2024, 11:31 | 15.8 | 15.8 °C |
| 25 Jun 2024, 10:03 | 15.7 | 15.7 °C |
pH
code 0061
7.37
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 7.37 | 7.37 |
| 1 Jul 2026, 13:11 | 7.52 | 7.52 |
| 2 Jun 2026, 10:54 | 7.28 | 7.28 |
| 6 May 2026, 10:27 | 7.33 | 7.33 |
| 13 Apr 2026, 13:25 | 7.58 | 7.58 |
| 6 Mar 2026, 10:42 | 7.72 | 7.72 |
| 2 Feb 2026, 12:34 | 7.99 | 7.99 |
| 12 Jan 2026, 13:09 | 7.83 | 7.83 |
| 4 Dec 2025, 14:17 | 7.84 | 7.84 |
| 11 Nov 2025, 09:29 | 7.69 | 7.69 |
| 14 Oct 2025, 09:35 | 7.44 | 7.44 |
| 3 Sep 2025, 11:52 | 7.43 | 7.43 |
| 12 Aug 2025, 11:30 | 7.51 | 7.51 |
| 24 Jul 2025, 12:00 | 7.41 | 7.41 |
| 23 Jun 2025, 12:00 | 7.54 | 7.54 |
| 30 May 2025, 12:12 | 7.45 | 7.45 |
| 24 Apr 2025, 10:20 | 7.36 | 7.36 |
| 4 Mar 2025, 09:30 | 8.03 | 8.03 |
| 14 Feb 2025, 11:44 | 8.01 | 8.01 |
| 28 Jan 2025, 10:22 | 8.01 | 8.01 |
| 4 Dec 2024, 09:20 | 7.82 | 7.82 |
| 19 Nov 2024, 11:03 | 7.52 | 7.52 |
| 16 Oct 2024, 13:44 | 7.48 | 7.48 |
| 26 Sep 2024, 11:08 | 7.46 | 7.46 |
| 21 Aug 2024, 13:08 | 7.73 | 7.73 |
| 24 Jul 2024, 11:31 | 7.43 | 7.43 |
| 25 Jun 2024, 10:03 | 7.36 | 7.36 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.15 mg/l
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 0.15 | 0.15 mg/l |
| 1 Jul 2026, 13:11 | 0.05 | 0.05 mg/l |
| 2 Jun 2026, 10:54 | 0.3 | 0.3 mg/l |
| 6 May 2026, 10:27 | 0.22 | 0.22 mg/l |
| 13 Apr 2026, 13:25 | 0.4 | 0.4 mg/l |
| 6 Mar 2026, 10:42 | 0.054 | 0.054 mg/l |
| 2 Feb 2026, 12:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jan 2026, 13:09 | 0.08 | 0.08 mg/l |
| 4 Dec 2025, 14:17 | 0.081 | 0.081 mg/l |
| 11 Nov 2025, 09:29 | 1.1 | 1.1 mg/l |
| 14 Oct 2025, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 11:52 | 0.24 | 0.24 mg/l |
| 12 Aug 2025, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jul 2025, 12:00 | 0.045 | 0.045 mg/l |
| 23 Jun 2025, 12:00 | 0.052 | 0.052 mg/l |
| 30 May 2025, 12:12 | 0.11 | 0.11 mg/l |
| 24 Apr 2025, 10:20 | 0.058 | 0.058 mg/l |
| 4 Mar 2025, 09:30 | 0.065 | 0.065 mg/l |
| 14 Feb 2025, 11:44 | 0.076 | 0.076 mg/l |
| 28 Jan 2025, 10:22 | 0.037 | 0.037 mg/l |
| 4 Dec 2024, 09:20 | 0.077 | 0.077 mg/l |
| 19 Nov 2024, 11:03 | 0.18 | 0.18 mg/l |
| 16 Oct 2024, 13:44 | 0.095 | 0.095 mg/l |
| 26 Sep 2024, 11:08 | 0.057 | 0.057 mg/l |
| 21 Aug 2024, 13:08 | 0.09 | 0.09 mg/l |
| 24 Jul 2024, 11:31 | 0.1 | 0.1 mg/l |
| 25 Jun 2024, 10:03 | 0.093 | 0.093 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.63 mg/l
Sampled 21 Aug 2026, 41 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 7.63 | 7.63 mg/l |
| 1 Jul 2026, 13:11 | 10.9 | 10.9 mg/l |
| 2 Jun 2026, 10:54 | 13.7 | 13.7 mg/l |
| 6 May 2026, 10:27 | 11.8 | 11.8 mg/l |
| 13 Apr 2026, 13:25 | 6.84 | 6.84 mg/l |
| 6 Mar 2026, 10:42 | 5.56 | 5.56 mg/l |
| 2 Feb 2026, 12:34 | 11 | 11 mg/l |
| 12 Jan 2026, 13:09 | 13 | 13 mg/l |
| 4 Dec 2025, 14:17 | 10.9 | 10.9 mg/l |
| 11 Nov 2025, 09:29 | 6.58 | 6.58 mg/l |
| 14 Oct 2025, 09:35 | 11 | 11 mg/l |
| 3 Sep 2025, 11:52 | 5.31 | 5.31 mg/l |
| 12 Aug 2025, 11:30 | 11.9 | 11.9 mg/l |
| 24 Jul 2025, 12:00 | 5.74 | 5.74 mg/l |
| 23 Jun 2025, 12:00 | 8.51 | 8.51 mg/l |
| 30 May 2025, 12:12 | 9.8 | 9.8 mg/l |
| 24 Apr 2025, 10:20 | 9.05 | 9.05 mg/l |
| 4 Mar 2025, 09:30 | 8.37 | 8.37 mg/l |
| 14 Feb 2025, 11:44 | 11 | 11 mg/l |
| 28 Jan 2025, 10:22 | 14 | 14 mg/l |
| 19 Nov 2024, 11:03 | 11 | 11 mg/l |
| 16 Oct 2024, 13:44 | 5.62 | 5.62 mg/l |
| 26 Sep 2024, 11:08 | 3.15 | 3.15 mg/l |
| 21 Aug 2024, 13:08 | 7.3 | 7.3 mg/l |
| 24 Jul 2024, 11:31 | 7.09 | 7.09 mg/l |
| 25 Jun 2024, 10:03 | 8.11 | 8.11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.035 mg/l
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 0.035 | 0.035 mg/l |
| 1 Jul 2026, 13:11 | 0.027 | 0.027 mg/l |
| 2 Jun 2026, 10:54 | 0.033 | 0.033 mg/l |
| 6 May 2026, 10:27 | 0.033 | 0.033 mg/l |
| 13 Apr 2026, 13:25 | 0.033 | 0.033 mg/l |
| 6 Mar 2026, 10:42 | 0.043 | 0.043 mg/l |
| 2 Feb 2026, 12:34 | 0.072 | 0.072 mg/l |
| 12 Jan 2026, 13:09 | 0.073 | 0.073 mg/l |
| 4 Dec 2025, 14:17 | 0.091 | 0.091 mg/l |
| 11 Nov 2025, 09:29 | 0.041 | 0.041 mg/l |
| 14 Oct 2025, 09:35 | 0.018 | 0.018 mg/l |
| 3 Sep 2025, 11:52 | 0.042 | 0.042 mg/l |
| 12 Aug 2025, 11:30 | 0.015 | 0.015 mg/l |
| 24 Jul 2025, 12:00 | 0.031 | 0.031 mg/l |
| 23 Jun 2025, 12:00 | 0.017 | 0.017 mg/l |
| 30 May 2025, 12:12 | 0.033 | 0.033 mg/l |
| 24 Apr 2025, 10:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2025, 09:30 | 0.024 | 0.024 mg/l |
| 14 Feb 2025, 11:44 | 0.045 | 0.045 mg/l |
| 28 Jan 2025, 10:22 | 0.071 | 0.071 mg/l |
| 4 Dec 2024, 09:20 | 0.049 | 0.049 mg/l |
| 19 Nov 2024, 11:03 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Oct 2024, 13:44 | 0.03 | 0.03 mg/l |
| 26 Sep 2024, 11:08 | 0.042 | 0.042 mg/l |
| 21 Aug 2024, 13:08 | 0.026 | 0.026 mg/l |
| 24 Jul 2024, 11:31 | 0.032 | 0.032 mg/l |
| 25 Jun 2024, 10:03 | 0.027 | 0.027 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1107 µS/cm
Sampled 21 Aug 2026, 41 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Aug 2026, 11:19 | 1107 | 1107 µS/cm |
| 1 Jul 2026, 13:11 | 1211 | 1211 µS/cm |
| 2 Jun 2026, 10:54 | 1285 | 1285 µS/cm |
| 6 May 2026, 10:27 | 1208 | 1208 µS/cm |
| 13 Apr 2026, 13:25 | 1134 | 1134 µS/cm |
| 6 Mar 2026, 10:42 | 920 | 920 µS/cm |
| 2 Feb 2026, 12:34 | 719 | 719 µS/cm |
| 12 Jan 2026, 13:09 | 808 | 808 µS/cm |
| 4 Dec 2025, 14:17 | 934 | 934 µS/cm |
| 11 Nov 2025, 09:29 | 1208 | 1208 µS/cm |
| 14 Oct 2025, 09:35 | 1251 | 1251 µS/cm |
| 3 Sep 2025, 11:52 | 845 | 845 µS/cm |
| 12 Aug 2025, 11:30 | 1280 | 1280 µS/cm |
| 24 Jul 2025, 12:00 | 934 | 934 µS/cm |
| 23 Jun 2025, 12:00 | 1139 | 1139 µS/cm |
| 30 May 2025, 12:12 | 1168 | 1168 µS/cm |
| 24 Apr 2025, 10:20 | 1117 | 1117 µS/cm |
| 4 Mar 2025, 09:30 | 994 | 994 µS/cm |
| 14 Feb 2025, 11:44 | 893 | 893 µS/cm |
| 28 Jan 2025, 10:22 | 785 | 785 µS/cm |
| 4 Dec 2024, 09:20 | 875 | 875 µS/cm |
| 19 Nov 2024, 11:03 | 728 | 728 µS/cm |
| 16 Oct 2024, 13:44 | 993 | 993 µS/cm |
| 26 Sep 2024, 11:08 | 813 | 813 µS/cm |
| 21 Aug 2024, 13:08 | 1215 | 1215 µS/cm |
| 24 Jul 2024, 11:31 | 1151 | 1151 µS/cm |
| 25 Jun 2024, 10:03 | 1144 | 1144 µS/cm |
Everything measured here
20 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 20 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Jun 2024 – Aug 2026 | 49.4% 21 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Aug 2026 | 4.87 mg/l 21 Aug 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Aug 2026 | 15.9 °C 21 Aug 2026 |
| pH 0061 | River water | 27 | Jun 2024 – Aug 2026 | 7.37 21 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jun 2024 – Aug 2026 | 0.15 mg/l 21 Aug 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Aug 2026 | 7.63 mg/l 21 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Jun 2024 – Aug 2026 | 0.035 mg/l 21 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Aug 2026 | 1107 µS/cm 21 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jun 2024 – Aug 2026 | 210 mg/l 21 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jun 2024 – Aug 2026 | 0.00101 mg/l 21 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jun 2024 – May 2026 | below 3 mg/l 6 May 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 1 | Jul 2026 – Jul 2026 | 5.3 mg/l 1 Jul 2026 |
| Chloride 0172 | River water | 1 | Jul 2026 – Jul 2026 | 140 mg/l 1 Jul 2026 |
| Flow Type 2896 | River water | 1 | Jul 2026 – Jul 2026 | Moderate Flow 1 Jul 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – Aug 2026 | 0.17 mg/l 21 Aug 2026 |
| Nitrogen, Total as N 9686 | River water | 1 | Jul 2026 – Jul 2026 | 12 mg/l 1 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Jun 2024 – Aug 2026 | 7.8 mg/l 21 Aug 2026 |
| Phosphorus, Total as P 0348 | River water | 1 | Jul 2026 – Jul 2026 | 0.042 mg/l 1 Jul 2026 |
| Silica, reactive as SiO2 0182 | River water | 1 | Jul 2026 – Jul 2026 | 13 mg/l 1 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Jul 2026 – Jul 2026 | below 3 mg/l 1 Jul 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.