Bristol Avon at St House, Little Somerford
EA name: BRISTOL AVON @ ST HSE, LITTLE SOMERFORD (also listed as “RSN2018 BRISTOL AVON NEAR STATION HOUSE, LITTLE SOMERFORD”)
Environment Agency sampling point SW-RSN2018 · 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
- 10 Dec 2024, 12:4122 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 25 Oct 2026 and had nothing newer.
- Samples banked
- 15 since 5 Oct 2023 Imported periods: 1 Oct 2023 – 25 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 395897, 183889As published, to the nearest 1 m. Open in a map
- River, by its own name
- Bristol Avon
- River, by the map
- River AvonPlaced on a river whose name partly matches its own, 2 m from the line.
- Next gauge downstream
- Great Somerford On the River Avon · 1.8 km along the river
- Nearest gauge upstream
- Rodbourne On the Gauze Brook · 3.6 km along the riverCrabb Mill On the Woodbridge Brook · 5.2 km along the riverSt Johns Weir On the Sherston Avon · 6.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (15 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.8%
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 98.8 | 98.8% |
| 15 Nov 2024, 09:01 | 96.2 | 96.2% |
| 21 Oct 2024, 11:37 | 94.8 | 94.8% |
| 20 Sep 2024, 13:22 | 97.2 | 97.2% |
| 2 Aug 2024, 11:59 | 96.9 | 96.9% |
| 12 Jul 2024, 10:20 | 93.8 | 93.8% |
| 16 May 2024, 09:22 | 98.1 | 98.1% |
| 25 Apr 2024, 12:53 | 100.7 | 100.7% |
| 13 Mar 2024, 11:37 | 97.4 | 97.4% |
| 22 Feb 2024, 11:58 | 98.8 | 98.8% |
| 10 Jan 2024, 10:34 | 100.2 | 100.2% |
| 6 Dec 2023, 10:13 | 95.8 | 95.8% |
| 15 Nov 2023, 13:30 | 94.4 | 94.4% |
| 3 Nov 2023, 09:17 | 91.8 | 91.8% |
| 5 Oct 2023, 13:26 | 93.5 | 93.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.5 mg/l
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 11.5 | 11.5 mg/l |
| 15 Nov 2024, 09:01 | 11.5 | 11.5 mg/l |
| 21 Oct 2024, 11:37 | 10.2 | 10.2 mg/l |
| 20 Sep 2024, 13:22 | 9.79 | 9.79 mg/l |
| 2 Aug 2024, 11:59 | 8.77 | 8.77 mg/l |
| 12 Jul 2024, 10:20 | 9.33 | 9.33 mg/l |
| 16 May 2024, 09:22 | 10.2 | 10.2 mg/l |
| 25 Apr 2024, 12:53 | 11.3 | 11.3 mg/l |
| 13 Mar 2024, 11:37 | 10.9 | 10.9 mg/l |
| 22 Feb 2024, 11:58 | 11.3 | 11.3 mg/l |
| 10 Jan 2024, 10:34 | 12.5 | 12.5 mg/l |
| 6 Dec 2023, 10:13 | 11.4 | 11.4 mg/l |
| 15 Nov 2023, 13:30 | 10.7 | 10.7 mg/l |
| 3 Nov 2023, 09:17 | 10.5 | 10.5 mg/l |
| 5 Oct 2023, 13:26 | 9.52 | 9.52 mg/l |
Water temperature
code 0076 · °C
8.6 °C
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 8.6 | 8.6 °C |
| 15 Nov 2024, 09:01 | 7.7 | 7.7 °C |
| 21 Oct 2024, 11:37 | 11.9 | 11.9 °C |
| 20 Sep 2024, 13:22 | 14.9 | 14.9 °C |
| 2 Aug 2024, 11:59 | 20.1 | 20.1 °C |
| 12 Jul 2024, 10:20 | 15.5 | 15.5 °C |
| 16 May 2024, 09:22 | 13.4 | 13.4 °C |
| 25 Apr 2024, 12:53 | 10.2 | 10.2 °C |
| 13 Mar 2024, 11:37 | 10.1 | 10.1 °C |
| 22 Feb 2024, 11:58 | 9.4 | 9.4 °C |
| 10 Jan 2024, 10:34 | 5.8 | 5.8 °C |
| 6 Dec 2023, 10:13 | 7.7 | 7.7 °C |
| 15 Nov 2023, 13:30 | 9.7 | 9.7 °C |
| 3 Nov 2023, 09:17 | 9.5 | 9.5 °C |
| 5 Oct 2023, 13:26 | 14.4 | 14.4 °C |
pH
code 0061
8.04
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 8.04 | 8.04 |
| 15 Nov 2024, 09:01 | 8.12 | 8.12 |
| 21 Oct 2024, 11:37 | 7.93 | 7.93 |
| 20 Sep 2024, 13:22 | 8.02 | 8.02 |
| 2 Aug 2024, 11:59 | 7.96 | 7.96 |
| 12 Jul 2024, 10:20 | 8.06 | 8.06 |
| 16 May 2024, 09:22 | 8.13 | 8.13 |
| 25 Apr 2024, 12:53 | 8.26 | 8.26 |
| 13 Mar 2024, 11:37 | 7.92 | 7.92 |
| 22 Feb 2024, 11:58 | 8.05 | 8.05 |
| 10 Jan 2024, 10:34 | 8.24 | 8.24 |
| 6 Dec 2023, 10:13 | 7.92 | 7.92 |
| 15 Nov 2023, 13:30 | 7.91 | 7.91 |
| 3 Nov 2023, 09:17 | 7.93 | 7.93 |
| 5 Oct 2023, 13:26 | 8.04 | 8.04 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.026 mg/l
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 0.026 | 0.026 mg/l |
| 15 Nov 2024, 09:01 | 0.035 | 0.035 mg/l |
| 21 Oct 2024, 11:37 | 0.037 | 0.037 mg/l |
| 20 Sep 2024, 13:22 | 0.017 | 0.017 mg/l |
| 2 Aug 2024, 11:59 | 0.062 | 0.062 mg/l |
| 12 Jul 2024, 10:20 | 0.038 | 0.038 mg/l |
| 16 May 2024, 09:22 | 0.035 | 0.035 mg/l |
| 25 Apr 2024, 12:53 | 0.061 | 0.061 mg/l |
| 13 Mar 2024, 11:37 | 0.091 | 0.091 mg/l |
| 22 Feb 2024, 11:58 | 0.094 | 0.094 mg/l |
| 10 Jan 2024, 10:34 | 0.056 | 0.056 mg/l |
| 6 Dec 2023, 10:13 | 0.053 | 0.053 mg/l |
| 15 Nov 2023, 13:30 | 0.049 | 0.049 mg/l |
| 3 Nov 2023, 09:17 | 0.032 | 0.032 mg/l |
| 5 Oct 2023, 13:26 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.98 mg/l
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 5.98 | 5.98 mg/l |
| 15 Nov 2024, 09:01 | 6.58 | 6.58 mg/l |
| 21 Oct 2024, 11:37 | 4.28 | 4.28 mg/l |
| 20 Sep 2024, 13:22 | 5.68 | 5.68 mg/l |
| 2 Aug 2024, 11:59 | 5.06 | 5.06 mg/l |
| 12 Jul 2024, 10:20 | 7.73 | 7.73 mg/l |
| 16 May 2024, 09:22 | 5.67 | 5.67 mg/l |
| 25 Apr 2024, 12:53 | 5.97 | 5.97 mg/l |
| 13 Mar 2024, 11:37 | 3.78 | 3.78 mg/l |
| 22 Feb 2024, 11:58 | 4.18 | 4.18 mg/l |
| 10 Jan 2024, 10:34 | 6.58 | 6.58 mg/l |
| 6 Dec 2023, 10:13 | 4.58 | 4.58 mg/l |
| 15 Nov 2023, 13:30 | 4.59 | 4.59 mg/l |
| 3 Nov 2023, 09:17 | 3.98 | 3.98 mg/l |
| 5 Oct 2023, 13:26 | 6.66 | 6.66 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.044 mg/l
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 0.044 | 0.044 mg/l |
| 15 Nov 2024, 09:01 | 0.048 | 0.048 mg/l |
| 21 Oct 2024, 11:37 | 0.08 | 0.08 mg/l |
| 20 Sep 2024, 13:22 | 0.069 | 0.069 mg/l |
| 2 Aug 2024, 11:59 | 0.13 | 0.13 mg/l |
| 12 Jul 2024, 10:20 | 0.11 | 0.11 mg/l |
| 16 May 2024, 09:22 | 0.062 | 0.062 mg/l |
| 25 Apr 2024, 12:53 | 0.053 | 0.053 mg/l |
| 13 Mar 2024, 11:37 | 0.06 | 0.06 mg/l |
| 22 Feb 2024, 11:58 | 0.064 | 0.064 mg/l |
| 10 Jan 2024, 10:34 | 0.046 | 0.046 mg/l |
| 6 Dec 2023, 10:13 | 0.066 | 0.066 mg/l |
| 15 Nov 2023, 13:30 | 0.072 | 0.072 mg/l |
| 3 Nov 2023, 09:17 | 0.095 | 0.095 mg/l |
| 5 Oct 2023, 13:26 | 0.13 | 0.13 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
591 µS/cm
Sampled 10 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 12:41 | 591 | 591 µS/cm |
| 15 Nov 2024, 09:01 | 642 | 642 µS/cm |
| 21 Oct 2024, 11:37 | 527 | 527 µS/cm |
| 20 Sep 2024, 13:22 | 676 | 676 µS/cm |
| 2 Aug 2024, 11:59 | 681 | 681 µS/cm |
| 12 Jul 2024, 10:20 | 637 | 637 µS/cm |
| 16 May 2024, 09:22 | 625 | 625 µS/cm |
| 25 Apr 2024, 12:53 | 623 | 623 µS/cm |
| 13 Mar 2024, 11:37 | 503 | 503 µS/cm |
| 22 Feb 2024, 11:58 | 502 | 502 µS/cm |
| 10 Jan 2024, 10:34 | 605 | 605 µS/cm |
| 6 Dec 2023, 10:13 | 527 | 527 µS/cm |
| 15 Nov 2023, 13:30 | 508 | 508 µS/cm |
| 3 Nov 2023, 09:17 | 461 | 461 µS/cm |
| 5 Oct 2023, 13:26 | 654 | 654 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 15 | Oct 2023 – Dec 2024 | 98.8% 10 Dec 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 15 | Oct 2023 – Dec 2024 | 11.5 mg/l 10 Dec 2024 |
| Temperature of Water 0076 | River water | 15 | Oct 2023 – Dec 2024 | 8.6 °C 10 Dec 2024 |
| pH 0061 | River water | 15 | Oct 2023 – Dec 2024 | 8.04 10 Dec 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Dec 2024 | 0.026 mg/l 10 Dec 2024 |
| Nitrate as N 0117 | River water | 15 | Oct 2023 – Dec 2024 | 5.98 mg/l 10 Dec 2024 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Oct 2023 – Dec 2024 | 0.044 mg/l 10 Dec 2024 |
| Conductivity at 25 C 0077 | River water | 15 | Oct 2023 – Dec 2024 | 591 µS/cm 10 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Oct 2023 – Dec 2024 | 260 mg/l 10 Dec 2024 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Dec 2024 | 0.00043 mg/l 10 Dec 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 14 | Oct 2023 – Nov 2024 | 1.7 mg/l 15 Nov 2024 |
| Chloride 0172 | River water | 14 | Oct 2023 – Dec 2024 | 16 mg/l 10 Dec 2024 |
| Flow Type 2896 | River water | 6 | Jul 2024 – Dec 2024 | High Flow 10 Dec 2024 |
| Nitrite as N 0118 | River water | 15 | Oct 2023 – Dec 2024 | 0.018 mg/l 10 Dec 2024 |
| Nitrogen, Total as N 9686 | River water | 14 | Oct 2023 – Dec 2024 | 6.5 mg/l 10 Dec 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Oct 2023 – Dec 2024 | 6 mg/l 10 Dec 2024 |
| Phosphorus, Total as P 0348 | River water | 14 | Oct 2023 – Nov 2024 | 0.066 mg/l 15 Nov 2024 |
| Silica, reactive as SiO2 0182 | River water | 14 | Oct 2023 – Dec 2024 | 5.9 mg/l 10 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.