Worthenbury Brook upstream confluence Dee
EA name: WORTHENBURY BROOK U/S CONFLUENCE DEE (also listed as “WORTHENBURY BROOK UPSTREAM OF CONFLUENCE WITH DEE”)
Environment Agency sampling point NW-88025876 · 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
- 11 May 2026, 10:175 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
- 21 since 6 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 342136, 348013As published, to the nearest 1 m. Open in a map
- River, by its own name
- Worthenbury Brook
- River, by the map
- Worthenbury BrookPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Farndon On the Dee · 14 km along the river
- Why it was sampled
- Monitoring (national agency policy) (15 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.2%
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 95.2 | 95.2% |
| 1 Apr 2026, 10:27 | 87.2 | 87.2% |
| 12 Mar 2026, 09:52 | 90.7 | 90.7% |
| 6 Feb 2026, 12:46 | 89.5 | 89.5% |
| 6 Jan 2026, 12:17 | 91.5 | 91.5% |
| 20 Mar 2025, 10:22 | 94.5 | 94.5% |
| 19 Feb 2025, 11:55 | 95.4 | 95.4% |
| 20 Jan 2025, 11:29 | 94.2 | 94.2% |
| 17 Dec 2024, 10:49 | 85.8 | 85.8% |
| 15 Oct 2024, 14:05 | 91.7 | 91.7% |
| 28 Aug 2024, 12:20 | 12.1 | 12.1% |
| 25 Jul 2024, 10:01 | 91.1 | 91.1% |
| 24 Jun 2024, 13:04 | 103 | 103% |
| 31 May 2024, 13:33 | 94.8 | 94.8% |
| 17 Apr 2024, 11:06 | 91.1 | 91.1% |
| 7 Mar 2024, 13:46 | 91 | 91% |
| 13 Feb 2024, 11:54 | 90.1 | 90.1% |
| 29 Jan 2024, 12:14 | 84.3 | 84.3% |
| 21 Dec 2023, 11:36 | 84.4 | 84.4% |
| 21 Nov 2023, 12:10 | 81.7 | 81.7% |
| 6 Oct 2023, 11:16 | 84.6 | 84.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.7 mg/l
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 10.7 | 10.7 mg/l |
| 1 Apr 2026, 10:27 | 9.75 | 9.75 mg/l |
| 12 Mar 2026, 09:52 | 10.6 | 10.6 mg/l |
| 6 Feb 2026, 12:46 | 11.2 | 11.2 mg/l |
| 6 Jan 2026, 12:17 | 12.6 | 12.6 mg/l |
| 20 Mar 2025, 10:22 | 11.4 | 11.4 mg/l |
| 19 Feb 2025, 11:55 | 12.5 | 12.5 mg/l |
| 20 Jan 2025, 11:29 | 12 | 12 mg/l |
| 17 Dec 2024, 10:49 | 10.1 | 10.1 mg/l |
| 15 Oct 2024, 14:05 | 10.2 | 10.2 mg/l |
| 28 Aug 2024, 12:20 | 1.24 | 1.24 mg/l |
| 25 Jul 2024, 10:01 | 9.06 | 9.06 mg/l |
| 24 Jun 2024, 13:04 | 10 | 10 mg/l |
| 31 May 2024, 13:33 | 9.45 | 9.45 mg/l |
| 17 Apr 2024, 11:06 | 10.4 | 10.4 mg/l |
| 7 Mar 2024, 13:46 | 11.2 | 11.2 mg/l |
| 13 Feb 2024, 11:54 | 11.1 | 11.1 mg/l |
| 29 Jan 2024, 12:14 | 10 | 10 mg/l |
| 21 Dec 2023, 11:36 | 9.72 | 9.72 mg/l |
| 21 Nov 2023, 12:10 | 9.32 | 9.32 mg/l |
| 6 Oct 2023, 11:16 | 8.72 | 8.72 mg/l |
Water temperature
code 0076 · °C
10.2 °C
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 10.2 | 10.2 °C |
| 1 Apr 2026, 10:27 | 10.3 | 10.3 °C |
| 12 Mar 2026, 09:52 | 8.6 | 8.6 °C |
| 6 Feb 2026, 12:46 | 5.6 | 5.6 °C |
| 6 Jan 2026, 12:17 | 2.2 | 2.2 °C |
| 20 Mar 2025, 10:22 | 7.2 | 7.2 °C |
| 19 Feb 2025, 11:55 | 4.1 | 4.1 °C |
| 20 Jan 2025, 11:29 | 4.9 | 4.9 °C |
| 17 Dec 2024, 10:49 | 8.1 | 8.1 °C |
| 15 Oct 2024, 14:05 | 10.7 | 10.7 °C |
| 28 Aug 2024, 12:20 | 14.2 | 14.2 °C |
| 25 Jul 2024, 10:01 | 15.5 | 15.5 °C |
| 24 Jun 2024, 13:04 | 16.6 | 16.6 °C |
| 31 May 2024, 13:33 | 15.4 | 15.4 °C |
| 17 Apr 2024, 11:06 | 9.4 | 9.4 °C |
| 7 Mar 2024, 13:46 | 6.5 | 6.5 °C |
| 13 Feb 2024, 11:54 | 6.5 | 6.5 °C |
| 29 Jan 2024, 12:14 | 7.8 | 7.8 °C |
| 21 Dec 2023, 11:36 | 9.1 | 9.1 °C |
| 21 Nov 2023, 12:10 | 9.5 | 9.5 °C |
| 6 Oct 2023, 11:16 | 13.9 | 13.9 °C |
pH
code 0061
8.17
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 8.17 | 8.17 |
| 1 Apr 2026, 10:27 | 8.01 | 8.01 |
| 12 Mar 2026, 09:52 | 8.04 | 8.04 |
| 6 Feb 2026, 12:46 | 7.71 | 7.71 |
| 6 Jan 2026, 12:17 | 8 | 8 |
| 20 Mar 2025, 10:22 | 8.2 | 8.2 |
| 19 Feb 2025, 11:55 | 8.19 | 8.19 |
| 20 Jan 2025, 11:29 | 7.87 | 7.87 |
| 17 Dec 2024, 10:49 | 7.77 | 7.77 |
| 15 Oct 2024, 14:05 | 7.97 | 7.97 |
| 28 Aug 2024, 12:20 | 7.01 | 7.01 |
| 25 Jul 2024, 10:01 | 8.15 | 8.15 |
| 24 Jun 2024, 13:04 | 8.24 | 8.24 |
| 31 May 2024, 13:33 | 8.22 | 8.22 |
| 17 Apr 2024, 11:06 | 7.81 | 7.81 |
| 7 Mar 2024, 13:46 | 7.99 | 7.99 |
| 13 Feb 2024, 11:54 | 7.8 | 7.8 |
| 29 Jan 2024, 12:14 | 7.75 | 7.75 |
| 21 Dec 2023, 11:36 | 7.9 | 7.9 |
| 21 Nov 2023, 12:10 | 7.87 | 7.87 |
| 6 Oct 2023, 11:16 | 7.93 | 7.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.035 mg/l
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 0.035 | 0.035 mg/l |
| 1 Apr 2026, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2026, 09:52 | 0.057 | 0.057 mg/l |
| 6 Feb 2026, 12:46 | 0.2 | 0.2 mg/l |
| 6 Jan 2026, 12:17 | 0.4 | 0.4 mg/l |
| 20 Mar 2025, 10:22 | 0.24 | 0.24 mg/l |
| 19 Feb 2025, 11:55 | 0.24 | 0.24 mg/l |
| 20 Jan 2025, 11:29 | 0.39 | 0.39 mg/l |
| 17 Dec 2024, 10:49 | 0.16 | 0.16 mg/l |
| 15 Oct 2024, 14:05 | 0.059 | 0.059 mg/l |
| 28 Aug 2024, 12:20 | 0.084 | 0.084 mg/l |
| 25 Jul 2024, 10:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2024, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 May 2024, 13:33 | 0.048 | 0.048 mg/l |
| 17 Apr 2024, 11:06 | 0.19 | 0.19 mg/l |
| 7 Mar 2024, 13:46 | 0.23 | 0.23 mg/l |
| 13 Feb 2024, 11:54 | 0.17 | 0.17 mg/l |
| 29 Jan 2024, 12:14 | 0.16 | 0.16 mg/l |
| 21 Dec 2023, 11:36 | 0.34 | 0.34 mg/l |
| 21 Nov 2023, 12:10 | 0.16 | 0.16 mg/l |
| 6 Oct 2023, 11:16 | 0.032 | 0.032 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.76 mg/l
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 5.76 | 5.76 mg/l |
| 1 Apr 2026, 10:27 | 5.48 | 5.48 mg/l |
| 12 Mar 2026, 09:52 | 6.26 | 6.26 mg/l |
| 6 Feb 2026, 12:46 | 3.48 | 3.48 mg/l |
| 6 Jan 2026, 12:17 | 6.35 | 6.35 mg/l |
| 20 Mar 2025, 10:22 | 6.86 | 6.86 mg/l |
| 19 Feb 2025, 11:55 | 5.42 | 5.42 mg/l |
| 20 Jan 2025, 11:29 | 5.75 | 5.75 mg/l |
| 17 Dec 2024, 10:49 | 4.93 | 4.93 mg/l |
| 15 Oct 2024, 14:05 | 5.43 | 5.43 mg/l |
| 28 Aug 2024, 12:20 | 0.178 | 0.178 mg/l |
| 25 Jul 2024, 10:01 | 6.38 | 6.38 mg/l |
| 24 Jun 2024, 13:04 | 7.08 | 7.08 mg/l |
| 31 May 2024, 13:33 | 5.87 | 5.87 mg/l |
| 17 Apr 2024, 11:06 | 4.92 | 4.92 mg/l |
| 7 Mar 2024, 13:46 | 5.74 | 5.74 mg/l |
| 13 Feb 2024, 11:54 | 5.16 | 5.16 mg/l |
| 29 Jan 2024, 12:14 | 5.15 | 5.15 mg/l |
| 21 Dec 2023, 11:36 | 5.22 | 5.22 mg/l |
| 21 Nov 2023, 12:10 | 4.73 | 4.73 mg/l |
| 6 Oct 2023, 11:16 | 5.57 | 5.57 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.14 mg/l
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 0.14 | 0.14 mg/l |
| 1 Apr 2026, 10:27 | 0.12 | 0.12 mg/l |
| 12 Mar 2026, 09:52 | 0.13 | 0.13 mg/l |
| 6 Feb 2026, 12:46 | 0.23 | 0.23 mg/l |
| 6 Jan 2026, 12:17 | 0.15 | 0.15 mg/l |
| 20 Mar 2025, 10:22 | 0.16 | 0.16 mg/l |
| 19 Feb 2025, 11:55 | 0.16 | 0.16 mg/l |
| 20 Jan 2025, 11:29 | 0.17 | 0.17 mg/l |
| 17 Dec 2024, 10:49 | 0.22 | 0.22 mg/l |
| 15 Oct 2024, 14:05 | 0.17 | 0.17 mg/l |
| 28 Aug 2024, 12:20 | 0.25 | 0.25 mg/l |
| 25 Jul 2024, 10:01 | 0.16 | 0.16 mg/l |
| 24 Jun 2024, 13:04 | 0.14 | 0.14 mg/l |
| 31 May 2024, 13:33 | 0.17 | 0.17 mg/l |
| 17 Apr 2024, 11:06 | 0.32 | 0.32 mg/l |
| 7 Mar 2024, 13:46 | 0.15 | 0.15 mg/l |
| 13 Feb 2024, 11:54 | 0.13 | 0.13 mg/l |
| 29 Jan 2024, 12:14 | 0.16 | 0.16 mg/l |
| 21 Dec 2023, 11:36 | 0.22 | 0.22 mg/l |
| 21 Nov 2023, 12:10 | 0.21 | 0.21 mg/l |
| 6 Oct 2023, 11:16 | 0.21 | 0.21 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
897 µS/cm
Sampled 11 May 2026, 5 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 May 2026, 10:17 | 897 | 897 µS/cm |
| 1 Apr 2026, 10:27 | 847 | 847 µS/cm |
| 12 Mar 2026, 09:52 | 806 | 806 µS/cm |
| 6 Feb 2026, 12:46 | 359 | 359 µS/cm |
| 6 Jan 2026, 12:17 | 824 | 824 µS/cm |
| 20 Mar 2025, 10:22 | 853 | 853 µS/cm |
| 19 Feb 2025, 11:55 | 768 | 768 µS/cm |
| 20 Jan 2025, 11:29 | 715 | 715 µS/cm |
| 17 Dec 2024, 10:49 | 653 | 653 µS/cm |
| 15 Oct 2024, 14:05 | 760 | 760 µS/cm |
| 28 Aug 2024, 12:20 | 1962 | 1962 µS/cm |
| 25 Jul 2024, 10:01 | 910 | 910 µS/cm |
| 24 Jun 2024, 13:04 | 948 | 948 µS/cm |
| 31 May 2024, 13:33 | 821 | 821 µS/cm |
| 17 Apr 2024, 11:06 | 648 | 648 µS/cm |
| 7 Mar 2024, 13:46 | 737 | 737 µS/cm |
| 13 Feb 2024, 11:54 | 609 | 609 µS/cm |
| 29 Jan 2024, 12:14 | 645 | 645 µS/cm |
| 21 Dec 2023, 11:36 | 624 | 624 µS/cm |
| 21 Nov 2023, 12:10 | 560 | 560 µS/cm |
| 6 Oct 2023, 11:16 | 920 | 920 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 | 21 | Oct 2023 – May 2026 | 95.2% 11 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – May 2026 | 10.7 mg/l 11 May 2026 |
| Temperature of Water 0076 | River water | 21 | Oct 2023 – May 2026 | 10.2 °C 11 May 2026 |
| pH 0061 | River water | 21 | Oct 2023 – May 2026 | 8.17 11 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – May 2026 | 0.035 mg/l 11 May 2026 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – May 2026 | 5.76 mg/l 11 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – May 2026 | 0.14 mg/l 11 May 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – May 2026 | 897 µS/cm 11 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – May 2026 | 250 mg/l 11 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Oct 2023 – May 2026 | 0.00065 mg/l 11 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Oct 2023 – May 2026 | 1.6 mg/l 11 May 2026 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – May 2026 | 0.045 mg/l 11 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – May 2026 | 5.8 mg/l 11 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.