Somerhill Stream Old Forge Farm
EA name: SOMERHILL STREAM OLD FORGE FM (also listed as “OLD FORGE FARM SOMERHILL STREAM”)
Environment Agency sampling point SO-E0000770 · 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
- 4 Aug 2026, 11:2258 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 18 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 559400, 142800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.9%
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 88.9 | 88.9% |
| 5 Feb 2025, 15:14 | 96.3 | 96.3% |
| 14 Jan 2025, 15:28 | 91.2 | 91.2% |
| 4 Dec 2024, 11:21 | 92.2 | 92.2% |
| 8 Nov 2024, 15:25 | 90.1 | 90.1% |
| 2 Oct 2024, 09:18 | 90.9 | 90.9% |
| 4 Sep 2024, 12:16 | 88.9 | 88.9% |
| 2 Aug 2024, 12:23 | 76.5 | 76.5% |
| 2 Jul 2024, 14:21 | 82.1 | 82.1% |
| 21 Jun 2024, 09:15 | 84.6 | 84.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.56 mg/l
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 9.56 | 9.56 mg/l |
| 5 Feb 2025, 15:14 | 11 | 11 mg/l |
| 14 Jan 2025, 15:28 | 10.5 | 10.5 mg/l |
| 4 Dec 2024, 11:21 | 10.4 | 10.4 mg/l |
| 8 Nov 2024, 15:25 | 9.54 | 9.54 mg/l |
| 2 Oct 2024, 09:18 | 9.22 | 9.22 mg/l |
| 4 Sep 2024, 12:16 | 8.34 | 8.34 mg/l |
| 2 Aug 2024, 12:23 | 7.04 | 7.04 mg/l |
| 2 Jul 2024, 14:21 | 7.96 | 7.96 mg/l |
| 21 Jun 2024, 09:15 | 8.42 | 8.42 mg/l |
Water temperature
code 0076 · °C
12 °C
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 12 | 12 °C |
| 5 Feb 2025, 15:14 | 9.6 | 9.6 °C |
| 14 Jan 2025, 15:28 | 8.9 | 8.9 °C |
| 4 Dec 2024, 11:21 | 9.9 | 9.9 °C |
| 8 Nov 2024, 15:25 | 12.7 | 12.7 °C |
| 2 Oct 2024, 09:18 | 14.6 | 14.6 °C |
| 4 Sep 2024, 12:16 | 18.3 | 18.3 °C |
| 2 Aug 2024, 12:23 | 19.3 | 19.3 °C |
| 2 Jul 2024, 14:21 | 16.7 | 16.7 °C |
| 21 Jun 2024, 09:15 | 15.5 | 15.5 °C |
pH
code 0061
7.49
Sampled 10 Mar 2025, 19 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 7.49 | 7.49 |
| 5 Feb 2025, 15:14 | 7.53 | 7.53 |
| 14 Jan 2025, 15:28 | 7.43 | 7.43 |
| 4 Dec 2024, 11:21 | 7.57 | 7.57 |
| 8 Nov 2024, 15:25 | 7.61 | 7.61 |
| 2 Oct 2024, 09:18 | 7.54 | 7.54 |
| 4 Sep 2024, 12:16 | 7.59 | 7.59 |
| 2 Aug 2024, 12:23 | 7.41 | 7.41 |
| 2 Jul 2024, 14:21 | 7.44 | 7.44 |
| 21 Jun 2024, 09:15 | 7.4 | 7.4 |
| 3 Jan 2024, 12:01 | 7.38 | 7.38 |
| 18 Oct 2023, 10:40 | 7.63 | 7.63 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
1.6 mg/l
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 1.6 | 1.6 mg/l |
| 5 Feb 2025, 15:14 | 0.27 | 0.27 mg/l |
| 14 Jan 2025, 15:28 | 0.46 | 0.46 mg/l |
| 4 Dec 2024, 11:21 | 0.24 | 0.24 mg/l |
| 8 Nov 2024, 15:25 | 0.099 | 0.099 mg/l |
| 2 Oct 2024, 09:18 | 0.2 | 0.2 mg/l |
| 4 Sep 2024, 12:16 | 0.068 | 0.068 mg/l |
| 2 Aug 2024, 12:23 | 0.04 | 0.04 mg/l |
| 2 Jul 2024, 14:21 | 0.24 | 0.24 mg/l |
| 21 Jun 2024, 09:15 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
17.7 mg/l
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 17.7 | 17.7 mg/l |
| 5 Feb 2025, 15:14 | 18.9 | 18.9 mg/l |
| 14 Jan 2025, 15:28 | 17.8 | 17.8 mg/l |
| 4 Dec 2024, 11:21 | 13.9 | 13.9 mg/l |
| 8 Nov 2024, 15:25 | 23.9 | 23.9 mg/l |
| 2 Oct 2024, 09:18 | 9.95 | 9.95 mg/l |
| 4 Sep 2024, 12:16 | 19.9 | 19.9 mg/l |
| 2 Aug 2024, 12:23 | 19.9 | 19.9 mg/l |
| 2 Jul 2024, 14:21 | 22.9 | 22.9 mg/l |
| 21 Jun 2024, 09:15 | 26.9 | 26.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.58 mg/l
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 0.58 | 0.58 mg/l |
| 5 Feb 2025, 15:14 | 0.41 | 0.41 mg/l |
| 14 Jan 2025, 15:28 | 0.45 | 0.45 mg/l |
| 4 Dec 2024, 11:21 | 0.45 | 0.45 mg/l |
| 8 Nov 2024, 15:25 | 0.61 | 0.61 mg/l |
| 2 Oct 2024, 09:18 | 0.41 | 0.41 mg/l |
| 4 Sep 2024, 12:16 | 0.71 | 0.71 mg/l |
| 2 Aug 2024, 12:23 | 0.63 | 0.63 mg/l |
| 2 Jul 2024, 14:21 | 0.74 | 0.74 mg/l |
| 21 Jun 2024, 09:15 | 0.58 | 0.58 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
739 µS/cm
Sampled 10 Mar 2025, 19 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Mar 2025, 13:20 | 739 | 739 µS/cm |
| 5 Feb 2025, 15:14 | 719 | 719 µS/cm |
| 14 Jan 2025, 15:28 | 713 | 713 µS/cm |
| 4 Dec 2024, 11:21 | 677 | 677 µS/cm |
| 8 Nov 2024, 15:25 | 814 | 814 µS/cm |
| 2 Oct 2024, 09:18 | 541 | 541 µS/cm |
| 4 Sep 2024, 12:16 | 774 | 774 µS/cm |
| 2 Aug 2024, 12:23 | 668 | 668 µS/cm |
| 2 Jul 2024, 14:21 | 833 | 833 µS/cm |
| 21 Jun 2024, 09:15 | 827 | 827 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Jun 2024 – Mar 2025 | 88.9% 10 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Jun 2024 – Mar 2025 | 9.56 mg/l 10 Mar 2025 |
| Temperature of Water 0076 | River water | 10 | Jun 2024 – Mar 2025 | 12 °C 10 Mar 2025 |
| pH 0061 | River water | 12 | Oct 2023 – Mar 2025 | 7.49 10 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Jun 2024 – Mar 2025 | 1.6 mg/l 10 Mar 2025 |
| Nitrate as N 0117 | River water | 10 | Jun 2024 – Mar 2025 | 17.7 mg/l 10 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Jun 2024 – Mar 2025 | 0.58 mg/l 10 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 10 | Jun 2024 – Mar 2025 | 739 µS/cm 10 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Jun 2024 – Mar 2025 | 85 mg/l 10 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 10 | Jun 2024 – Mar 2025 | 0.0106 mg/l 10 Mar 2025 |
| Calcium, Dissolved 0239 | River water | 2 | Oct 2023 – Jan 2024 | 50 mg/l 3 Jan 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Oct 2023 – Jan 2024 | 6.4 mg/l 3 Jan 2024 |
| Copper : BLM Bioavailable 4821 | River water | 2 | Oct 2023 – Jan 2024 | 0.16 µg/l 3 Jan 2024 |
| Copper, Dissolved 6450 | River water | 2 | Oct 2023 – Jan 2024 | 4 µg/l 3 Jan 2024 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 33 | Oct 2023 – Aug 2026 | 1 text result 4 Aug 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 35 | Oct 2023 – Aug 2026 | 1 text result 4 Aug 2026 |
| Nitrite as N 0118 | River water | 10 | Jun 2024 – Mar 2025 | 0.34 mg/l 10 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Jun 2024 – Mar 2025 | 18 mg/l 10 Mar 2025 |
| Non Target Screening : Water 2876 | River water | 14 | Jan 2025 – Aug 2026 | 1 text result 4 Aug 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.