River Dee at A534 Wrexham Road Bridge, Holt
EA name: R DEE AT A534 WREXHAM ROAD BRIDGE, HOLT (also listed as “RIVER DEE AT A534 WREXHAM ROAD BRIDGE, HOLT”)
Environment Agency sampling point NW-26344EA · 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
- 7 Mar 2025, 10:3719 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
- 16 since 24 Oct 2023 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 341022, 353412As published, to the nearest 1 m. Open in a map
- River, by its own name
- Dee
- River, by the map
- River DeePlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Farndon On the Dee · 1.1 km along the river
- Nearest gauge upstream
- Bowling Bank River Station On the Clywedog · 18 km along the riverManley Hall River Station On the Dee · 35 km along the river
- Why it was sampled
- Monitoring (national agency policy) (16 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.4%
Sampled 7 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 96.4 | 96.4% |
| 17 Feb 2025, 11:29 | 95.9 | 95.9% |
| 29 Jan 2025, 09:09 | 96.3 | 96.3% |
| 17 Dec 2024, 09:49 | 93.5 | 93.5% |
| 5 Nov 2024, 09:43 | 92.8 | 92.8% |
| 7 Oct 2024, 12:04 | 87.5 | 87.5% |
| 18 Sep 2024, 09:38 | 94.5 | 94.5% |
| 12 Aug 2024, 12:51 | 91.1 | 91.1% |
| 3 Jul 2024, 09:58 | 94.9 | 94.9% |
| 13 Jun 2024, 11:39 | 98.4 | 98.4% |
| 7 Mar 2024, 13:14 | 93.1 | 93.1% |
| 13 Feb 2024, 12:09 | 91.3 | 91.3% |
| 22 Jan 2024, 11:03 | 97.3 | 97.3% |
| 21 Dec 2023, 11:02 | 94.5 | 94.5% |
| 9 Nov 2023, 10:34 | 95.6 | 95.6% |
| 24 Oct 2023, 10:49 | 86.7 | 86.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.5 mg/l
Sampled 7 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 11.5 | 11.5 mg/l |
| 17 Feb 2025, 11:29 | 12.3 | 12.3 mg/l |
| 29 Jan 2025, 09:09 | 12 | 12 mg/l |
| 17 Dec 2024, 09:49 | 10.9 | 10.9 mg/l |
| 5 Nov 2024, 09:43 | 10.2 | 10.2 mg/l |
| 7 Oct 2024, 12:04 | 9.43 | 9.43 mg/l |
| 18 Sep 2024, 09:38 | 9.86 | 9.86 mg/l |
| 12 Aug 2024, 12:51 | 8.44 | 8.44 mg/l |
| 3 Jul 2024, 09:58 | 9.46 | 9.46 mg/l |
| 13 Jun 2024, 11:39 | 10.3 | 10.3 mg/l |
| 7 Mar 2024, 13:14 | 11.4 | 11.4 mg/l |
| 13 Feb 2024, 12:09 | 11.3 | 11.3 mg/l |
| 22 Jan 2024, 11:03 | 11.7 | 11.7 mg/l |
| 21 Dec 2023, 11:02 | 11 | 11 mg/l |
| 9 Nov 2023, 10:34 | 11 | 11 mg/l |
| 24 Oct 2023, 10:49 | 9.58 | 9.58 mg/l |
Water temperature
code 0076 · °C
7.8 °C
Sampled 7 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 7.8 | 7.8 °C |
| 17 Feb 2025, 11:29 | 4.8 | 4.8 °C |
| 29 Jan 2025, 09:09 | 6 | 6 °C |
| 17 Dec 2024, 09:49 | 8.4 | 8.4 °C |
| 5 Nov 2024, 09:43 | 10.9 | 10.9 °C |
| 7 Oct 2024, 12:04 | 11.9 | 11.9 °C |
| 18 Sep 2024, 09:38 | 13.3 | 13.3 °C |
| 12 Aug 2024, 12:51 | 18.9 | 18.9 °C |
| 3 Jul 2024, 09:58 | 15.4 | 15.4 °C |
| 13 Jun 2024, 11:39 | 13 | 13 °C |
| 7 Mar 2024, 13:14 | 6.6 | 6.6 °C |
| 13 Feb 2024, 12:09 | 6.3 | 6.3 °C |
| 22 Jan 2024, 11:03 | 7.2 | 7.2 °C |
| 21 Dec 2023, 11:02 | 8.5 | 8.5 °C |
| 9 Nov 2023, 10:34 | 9 | 9 °C |
| 24 Oct 2023, 10:49 | 10.8 | 10.8 °C |
pH
code 0061
8.13
Sampled 7 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 8.13 | 8.13 |
| 17 Feb 2025, 11:29 | 7.59 | 7.59 |
| 29 Jan 2025, 09:09 | 7.62 | 7.62 |
| 17 Dec 2024, 09:49 | 7.7 | 7.7 |
| 5 Nov 2024, 09:43 | 7.64 | 7.64 |
| 7 Oct 2024, 12:04 | 7.47 | 7.47 |
| 18 Sep 2024, 09:38 | 7.77 | 7.77 |
| 12 Aug 2024, 12:51 | 7.5 | 7.5 |
| 3 Jul 2024, 09:58 | 8.03 | 8.03 |
| 13 Jun 2024, 11:39 | 7.95 | 7.95 |
| 7 Mar 2024, 13:14 | 7.58 | 7.58 |
| 13 Feb 2024, 12:09 | 7.62 | 7.62 |
| 22 Jan 2024, 11:03 | 7.7 | 7.7 |
| 21 Dec 2023, 11:02 | 7.85 | 7.85 |
| 9 Nov 2023, 10:34 | 7.99 | 7.99 |
| 24 Oct 2023, 10:49 | 7.46 | 7.46 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.13 mg/l
Sampled 7 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 0.13 | 0.13 mg/l |
| 17 Feb 2025, 11:29 | 0.12 | 0.12 mg/l |
| 29 Jan 2025, 09:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2024, 09:43 | 0.07 | 0.07 mg/l |
| 7 Oct 2024, 12:04 | 0.083 | 0.083 mg/l |
| 18 Sep 2024, 09:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2024, 12:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2024, 09:58 | 0.03 | 0.03 mg/l |
| 13 Jun 2024, 11:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2024, 13:14 | 0.066 | 0.066 mg/l |
| 13 Feb 2024, 12:09 | 0.097 | 0.097 mg/l |
| 22 Jan 2024, 11:03 | 0.15 | 0.15 mg/l |
| 21 Dec 2023, 11:02 | 0.062 | 0.062 mg/l |
| 9 Nov 2023, 10:34 | 0.043 | 0.043 mg/l |
| 24 Oct 2023, 10:49 | 0.04 | 0.04 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.97 mg/l
Sampled 7 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 1.97 | 1.97 mg/l |
| 17 Feb 2025, 11:29 | 2.18 | 2.18 mg/l |
| 29 Jan 2025, 09:09 | 1.19 | 1.19 mg/l |
| 5 Nov 2024, 09:43 | 1.77 | 1.77 mg/l |
| 7 Oct 2024, 12:04 | 1.38 | 1.38 mg/l |
| 18 Sep 2024, 09:38 | 1.58 | 1.58 mg/l |
| 12 Aug 2024, 12:51 | 1.69 | 1.69 mg/l |
| 3 Jul 2024, 09:58 | 2.19 | 2.19 mg/l |
| 13 Jun 2024, 11:39 | 1.79 | 1.79 mg/l |
| 7 Mar 2024, 13:14 | 1.79 | 1.79 mg/l |
| 13 Feb 2024, 12:09 | 1.49 | 1.49 mg/l |
| 22 Jan 2024, 11:03 | 1.19 | 1.19 mg/l |
| 21 Dec 2023, 11:02 | 1.29 | 1.29 mg/l |
| 9 Nov 2023, 10:34 | 1.19 | 1.19 mg/l |
| 24 Oct 2023, 10:49 | 1.59 | 1.59 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.051 mg/l
Sampled 7 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 0.051 | 0.051 mg/l |
| 17 Feb 2025, 11:29 | 0.092 | 0.092 mg/l |
| 29 Jan 2025, 09:09 | 0.05 | 0.05 mg/l |
| 5 Nov 2024, 09:43 | 0.031 | 0.031 mg/l |
| 7 Oct 2024, 12:04 | 0.088 | 0.088 mg/l |
| 18 Sep 2024, 09:38 | 0.029 | 0.029 mg/l |
| 12 Aug 2024, 12:51 | 0.029 | 0.029 mg/l |
| 3 Jul 2024, 09:58 | 0.027 | 0.027 mg/l |
| 13 Jun 2024, 11:39 | 0.03 | 0.03 mg/l |
| 7 Mar 2024, 13:14 | 0.03 | 0.03 mg/l |
| 13 Feb 2024, 12:09 | 0.039 | 0.039 mg/l |
| 22 Jan 2024, 11:03 | 0.07 | 0.07 mg/l |
| 21 Dec 2023, 11:02 | 0.035 | 0.035 mg/l |
| 9 Nov 2023, 10:34 | 0.022 | 0.022 mg/l |
| 24 Oct 2023, 10:49 | 0.057 | 0.057 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
252 µS/cm
Sampled 7 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 10:37 | 252 | 252 µS/cm |
| 17 Feb 2025, 11:29 | 303 | 303 µS/cm |
| 29 Jan 2025, 09:09 | 151 | 151 µS/cm |
| 17 Dec 2024, 09:49 | 314 | 314 µS/cm |
| 5 Nov 2024, 09:43 | 259 | 259 µS/cm |
| 7 Oct 2024, 12:04 | 234 | 234 µS/cm |
| 18 Sep 2024, 09:38 | 222 | 222 µS/cm |
| 12 Aug 2024, 12:51 | 211 | 211 µS/cm |
| 3 Jul 2024, 09:58 | 274 | 274 µS/cm |
| 13 Jun 2024, 11:39 | 258 | 258 µS/cm |
| 7 Mar 2024, 13:14 | 217 | 217 µS/cm |
| 13 Feb 2024, 12:09 | 179 | 179 µS/cm |
| 22 Jan 2024, 11:03 | 164 | 164 µS/cm |
| 21 Dec 2023, 11:02 | 153 | 153 µS/cm |
| 9 Nov 2023, 10:34 | 163 | 163 µS/cm |
| 24 Oct 2023, 10:49 | 162 | 162 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 16 | Oct 2023 – Mar 2025 | 96.4% 7 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Mar 2025 | 11.5 mg/l 7 Mar 2025 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Mar 2025 | 7.8 °C 7 Mar 2025 |
| pH 0061 | River water | 16 | Oct 2023 – Mar 2025 | 8.13 7 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Mar 2025 | 0.13 mg/l 7 Mar 2025 |
| Nitrate as N 0117 | River water | 15 | Oct 2023 – Mar 2025 | 1.97 mg/l 7 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Oct 2023 – Mar 2025 | 0.051 mg/l 7 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Mar 2025 | 252 µS/cm 7 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Oct 2023 – Mar 2025 | 63 mg/l 7 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Mar 2025 | 0.00202 mg/l 7 Mar 2025 |
| BOD : 5 Day ATU 0085 | River water | 15 | Oct 2023 – Mar 2025 | 1.4 mg/l 7 Mar 2025 |
| Chloride 0172 | River water | 15 | Oct 2023 – Mar 2025 | 22 mg/l 7 Mar 2025 |
| Nitrite as N 0118 | River water | 15 | Oct 2023 – Mar 2025 | 0.028 mg/l 7 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Oct 2023 – Mar 2025 | 2 mg/l 7 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 15 | Oct 2023 – Mar 2025 | 4.1 mg/l 7 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.