River Cerne at Charminster
EA name: RIVER CERNE AT CHARMINSTER
Environment Agency sampling point SW-50550310 · 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
- 16 Dec 2024, 11:0421 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
- 9 since 11 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 367955, 92667As published, to the nearest 1 m. Open in a map
- River, by its own name
- Cerne
- River, by the map
- River CernePlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Louds Mill On the River Frome · 5.0 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (9 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.1%
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 100.1 | 100.1% |
| 1 Jul 2024, 11:00 | 98.7 | 98.7% |
| 4 Jun 2024, 10:29 | 94.1 | 94.1% |
| 4 Mar 2024, 14:44 | 99.2 | 99.2% |
| 5 Feb 2024, 11:49 | 102.9 | 102.9% |
| 8 Jan 2024, 10:32 | 96.7 | 96.7% |
| 4 Dec 2023, 11:06 | 89.2 | 89.2% |
| 3 Nov 2023, 14:01 | 97.6 | 97.6% |
| 11 Oct 2023, 10:34 | 97.1 | 97.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 11.2 | 11.2 mg/l |
| 1 Jul 2024, 11:00 | 10.1 | 10.1 mg/l |
| 4 Jun 2024, 10:29 | 9.67 | 9.67 mg/l |
| 4 Mar 2024, 14:44 | 11.4 | 11.4 mg/l |
| 5 Feb 2024, 11:49 | 11.5 | 11.5 mg/l |
| 8 Jan 2024, 10:32 | 11.8 | 11.8 mg/l |
| 4 Dec 2023, 11:06 | 10.3 | 10.3 mg/l |
| 3 Nov 2023, 14:01 | 10.6 | 10.6 mg/l |
| 11 Oct 2023, 10:34 | 9.83 | 9.83 mg/l |
Water temperature
code 0076 · °C
10.4 °C
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 10.4 | 10.4 °C |
| 1 Jul 2024, 11:00 | 14 | 14 °C |
| 4 Jun 2024, 10:29 | 14 | 14 °C |
| 4 Mar 2024, 14:44 | 9.3 | 9.3 °C |
| 5 Feb 2024, 11:49 | 10.3 | 10.3 °C |
| 8 Jan 2024, 10:32 | 6.6 | 6.6 °C |
| 4 Dec 2023, 11:06 | 8.9 | 8.9 °C |
| 3 Nov 2023, 14:01 | 11.5 | 11.5 °C |
| 11 Oct 2023, 10:34 | 14.7 | 14.7 °C |
pH
code 0061
8.25
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 8.25 | 8.25 |
| 1 Jul 2024, 11:00 | 8.43 | 8.43 |
| 4 Jun 2024, 10:29 | 8.01 | 8.01 |
| 4 Mar 2024, 14:44 | 8.23 | 8.23 |
| 5 Feb 2024, 11:49 | 8.36 | 8.36 |
| 8 Jan 2024, 10:32 | 8.1 | 8.1 |
| 4 Dec 2023, 11:06 | 7.93 | 7.93 |
| 3 Nov 2023, 14:01 | 8.1 | 8.1 |
| 11 Oct 2023, 10:34 | 8.21 | 8.21 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2024, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jun 2024, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 14:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2024, 11:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jan 2024, 10:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2023, 11:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2023, 14:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Oct 2023, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.29 mg/l
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 6.29 | 6.29 mg/l |
| 1 Jul 2024, 11:00 | 4.79 | 4.79 mg/l |
| 4 Jun 2024, 10:29 | 5.39 | 5.39 mg/l |
| 4 Mar 2024, 14:44 | 5.99 | 5.99 mg/l |
| 5 Feb 2024, 11:49 | 6.09 | 6.09 mg/l |
| 8 Jan 2024, 10:32 | 6.49 | 6.49 mg/l |
| 4 Dec 2023, 11:06 | 3.69 | 3.69 mg/l |
| 3 Nov 2023, 14:01 | 4.99 | 4.99 mg/l |
| 11 Oct 2023, 10:34 | 4.59 | 4.59 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.055 mg/l
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 0.055 | 0.055 mg/l |
| 1 Jul 2024, 11:00 | 0.061 | 0.061 mg/l |
| 4 Jun 2024, 10:29 | 0.052 | 0.052 mg/l |
| 4 Mar 2024, 14:44 | 0.06 | 0.06 mg/l |
| 5 Feb 2024, 11:49 | 0.07 | 0.07 mg/l |
| 8 Jan 2024, 10:32 | 0.082 | 0.082 mg/l |
| 4 Dec 2023, 11:06 | 0.14 | 0.14 mg/l |
| 3 Nov 2023, 14:01 | 0.084 | 0.084 mg/l |
| 11 Oct 2023, 10:34 | 0.081 | 0.081 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
547 µS/cm
Sampled 16 Dec 2024, 21 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Dec 2024, 11:04 | 547 | 547 µS/cm |
| 1 Jul 2024, 11:00 | 536 | 536 µS/cm |
| 4 Jun 2024, 10:29 | 521 | 521 µS/cm |
| 4 Mar 2024, 14:44 | 537 | 537 µS/cm |
| 5 Feb 2024, 11:49 | 540 | 540 µS/cm |
| 8 Jan 2024, 10:32 | 561 | 561 µS/cm |
| 4 Dec 2023, 11:06 | 424 | 424 µS/cm |
| 3 Nov 2023, 14:01 | 531 | 531 µS/cm |
| 11 Oct 2023, 10:34 | 530 | 530 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
4700 per 100 ml
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 11:06 | 4700 | 4700 per 100 ml |
| 3 Nov 2023, 14:01 | 1700 | 1700 per 100 ml |
| 11 Oct 2023, 10:34 | 860 | 860 per 100 ml |
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 | 9 | Oct 2023 – Dec 2024 | 100.1% 16 Dec 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 9 | Oct 2023 – Dec 2024 | 11.2 mg/l 16 Dec 2024 |
| Temperature of Water 0076 | River water | 9 | Oct 2023 – Dec 2024 | 10.4 °C 16 Dec 2024 |
| pH 0061 | River water | 9 | Oct 2023 – Dec 2024 | 8.25 16 Dec 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 9 | Oct 2023 – Dec 2024 | below 0.03 mg/l 16 Dec 2024 |
| Nitrate as N 0117 | River water | 9 | Oct 2023 – Dec 2024 | 6.29 mg/l 16 Dec 2024 |
| Orthophosphate, reactive as P 0180 | River water | 9 | Oct 2023 – Dec 2024 | 0.055 mg/l 16 Dec 2024 |
| Conductivity at 25 C 0077 | River water | 9 | Oct 2023 – Dec 2024 | 547 µS/cm 16 Dec 2024 |
| Escherichia coli : Confirmed : MF 2348 | River water | 3 | Oct 2023 – Dec 2023 | 4700 per 100 ml 4 Dec 2023 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 9 | Oct 2023 – Dec 2024 | 220 mg/l 16 Dec 2024 |
| Ammonia un-ionised as N 0119 | River water | 9 | Oct 2023 – Dec 2024 | below 0.00056 mg/l 16 Dec 2024 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 3 | Oct 2023 – Dec 2023 | 17000 colony forming units / 100ml 4 Dec 2023 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 3 | Oct 2023 – Dec 2023 | 17000 colony forming units / 100ml 4 Dec 2023 |
| Nitrite as N 0118 | River water | 9 | Oct 2023 – Dec 2024 | 0.008 mg/l 16 Dec 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 9 | Oct 2023 – Dec 2024 | 6.3 mg/l 16 Dec 2024 |
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.