Chew Coley
EA name: CHEW COLEY
Environment Agency sampling point SW-A4070403 · 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
- 8 Sep 2026, 09:1823 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 30 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 358300, 155800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Chew
- River, by the map
- River ChewPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Planned investigation (local monitoring) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.4%
Sampled 8 Sep 2026, 23 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 09:18 | 89.4 | 89.4% |
| 4 Aug 2026, 09:15 | 84.1 | 84.1% |
| 7 Jul 2026, 09:21 | 97 | 97% |
| 8 Jun 2026, 09:37 | 94.5 | 94.5% |
| 11 May 2026, 11:33 | 104.3 | 104.3% |
| 22 Apr 2026, 12:53 | 107.9 | 107.9% |
Water temperature
code 0076 · °C
14.8 °C
Sampled 8 Sep 2026, 23 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 09:18 | 14.8 | 14.8 °C |
| 4 Aug 2026, 09:15 | 17.1 | 17.1 °C |
| 7 Jul 2026, 09:21 | 16 | 16 °C |
| 8 Jun 2026, 09:37 | 14 | 14 °C |
| 11 May 2026, 11:33 | 12.7 | 12.7 °C |
| 22 Apr 2026, 12:53 | 13.2 | 13.2 °C |
| 21 May 2025, 13:19 | 15.5 | 15.5 °C |
pH
code 0061
8.1
Sampled 8 Sep 2026, 23 days ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 09:18 | 8.1 | 8.1 |
| 4 Aug 2026, 09:15 | 8 | 8 |
| 7 Jul 2026, 09:21 | 8.2 | 8.2 |
| 8 Jun 2026, 09:37 | 8.2 | 8.2 |
| 11 May 2026, 11:33 | 8.3 | 8.3 |
| 22 Apr 2026, 12:53 | 8.3 | 8.3 |
| 17 Mar 2026, 11:35 | 8.36 | 8.36 |
| 24 Feb 2026, 13:03 | 8.22 | 8.22 |
| 30 Dec 2025, 13:03 | 8.23 | 8.23 |
| 19 Nov 2025, 13:56 | 8.05 | 8.05 |
| 22 Oct 2025, 14:10 | 7.95 | 7.95 |
| 23 Sep 2025, 12:53 | 8.13 | 8.13 |
| 28 Aug 2025, 13:47 | 7.98 | 7.98 |
| 15 Jul 2025, 10:52 | 8.06 | 8.06 |
| 26 Jun 2025, 15:06 | 8.07 | 8.07 |
| 21 May 2025, 13:19 | 8.27 | 8.27 |
| 14 May 2025, 09:48 | 8.21 | 8.21 |
| 20 Mar 2024, 10:57 | 8.18 | 8.18 |
| 6 Mar 2024, 09:42 | 8.22 | 8.22 |
| 21 Feb 2024, 10:58 | 8.07 | 8.07 |
| 5 Feb 2024, 09:39 | 8.28 | 8.28 |
| 15 Jan 2024, 12:47 | 8.22 | 8.22 |
| 4 Jan 2024, 11:41 | 8.05 | 8.05 |
| 18 Dec 2023, 11:09 | 8.2 | 8.2 |
| 4 Dec 2023, 11:00 | 7.95 | 7.95 |
| 20 Nov 2023, 11:01 | 8.03 | 8.03 |
| 3 Nov 2023, 10:39 | 8.02 | 8.02 |
| 17 Oct 2023, 11:26 | 8.04 | 8.04 |
| 6 Oct 2023, 11:36 | 8.13 | 8.13 |
Conductivity
at 25 °C · code 0077 · µS/cm
571 µS/cm
Sampled 8 Sep 2026, 23 days ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 09:18 | 571 | 571 µS/cm |
| 4 Aug 2026, 09:15 | 566 | 566 µS/cm |
| 7 Jul 2026, 09:21 | 571 | 571 µS/cm |
| 8 Jun 2026, 09:37 | 555 | 555 µS/cm |
| 11 May 2026, 11:33 | 593 | 593 µS/cm |
| 22 Apr 2026, 12:53 | 577 | 577 µS/cm |
| 21 May 2025, 13:19 | 571 | 571 µS/cm |
Everything measured here
31 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 31 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 6 | Apr 2026 – Sep 2026 | 89.4% 8 Sep 2026 |
| Temperature of Water 0076 | River water | 7 | May 2025 – Sep 2026 | 14.8 °C 8 Sep 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Sep 2026 | 8.1 8 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 7 | May 2025 – Sep 2026 | 571 µS/cm 8 Sep 2026 |
| Aluminium, Dissolved 6037 | River water | 24 | Oct 2023 – Mar 2026 | below 20 µg/l 17 Mar 2026 |
| Barium, Dissolved 9446 | River water | 6 | Apr 2026 – Sep 2026 | 220 µg/l 8 Sep 2026 |
| Boron, Dissolved 9447 | River water | 6 | Apr 2026 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Cadmium 0108 | River water | 6 | Apr 2026 – Sep 2026 | 0.35 µg/l 8 Sep 2026 |
| Cadmium, Dissolved 0106 | River water | 30 | Oct 2023 – Sep 2026 | 0.23 µg/l 8 Sep 2026 |
| Calcium, Dissolved 0239 | River water | 30 | Oct 2023 – Sep 2026 | 92 mg/l 8 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 30 | Oct 2023 – Sep 2026 | 1.9 mg/l 8 Sep 2026 |
| Chromium, Dissolved 3409 | River water | 24 | Oct 2023 – Mar 2026 | below 0.5 µg/l 17 Mar 2026 |
| Copper 6452 | River water | 6 | Apr 2026 – Sep 2026 | below 1 µg/l 8 Sep 2026 |
| Copper, Dissolved 6450 | River water | 30 | Oct 2023 – Sep 2026 | below 1 µg/l 8 Sep 2026 |
| Hardness, Total as CaCO3 0158 | River water | 30 | Oct 2023 – Sep 2026 | 275 mg/l 8 Sep 2026 |
| Iron, Dissolved 6460 | River water | 6 | Apr 2026 – Sep 2026 | below 30 µg/l 8 Sep 2026 |
| Lead 0050 | River water | 6 | Apr 2026 – Sep 2026 | 2.5 µg/l 8 Sep 2026 |
| Lead, Dissolved 0052 | River water | 30 | Oct 2023 – Sep 2026 | below 2 µg/l 8 Sep 2026 |
| Lithium, Dissolved 4201 | River water | 6 | Apr 2026 – Sep 2026 | below 100 µg/l 8 Sep 2026 |
| Magnesium, Dissolved 0235 | River water | 30 | Oct 2023 – Sep 2026 | 11 mg/l 8 Sep 2026 |
| Manganese, Dissolved 6458 | River water | 6 | Apr 2026 – Sep 2026 | 16 µg/l 8 Sep 2026 |
| Nickel 6462 | River water | 6 | Apr 2026 – Sep 2026 | 2.8 µg/l 8 Sep 2026 |
| Nickel, Dissolved 3410 | River water | 30 | Oct 2023 – Sep 2026 | 2.7 µg/l 8 Sep 2026 |
| pH : In Situ 3169 | River water | 6 | Apr 2026 – Sep 2026 | 8.03 8 Sep 2026 |
| Potassium, Dissolved 0209 | River water | 6 | Apr 2026 – Sep 2026 | 3 mg/l 8 Sep 2026 |
| Sodium, Dissolved 0205 | River water | 6 | Apr 2026 – Sep 2026 | 8.3 mg/l 8 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Apr 2026 – Sep 2026 | 6.3 mg/l 8 Sep 2026 |
| Strontium, Filtered 6693 | River water | 6 | Apr 2026 – Sep 2026 | 1500 µg/l 8 Sep 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 6 | Apr 2026 – Sep 2026 | 25 mg/l 8 Sep 2026 |
| Zinc 6455 | River water | 6 | Apr 2026 – Sep 2026 | 400 µg/l 8 Sep 2026 |
| Zinc, Dissolved 3408 | River water | 30 | Oct 2023 – Sep 2026 | 380 µg/l 8 Sep 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.