South Hykeham
EA name: SOUTH HYKEHAM (also listed as “HEADWATERS OF SOUTH HYKEHAM CATCHWATER”)
Environment Agency sampling point AN-STHHYKE · 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
- 6 Mar 2026, 09:547 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
- 22 since 10 Jun 2024 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 493709, 364781As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- The BeckPlaced by position alone, on a line whose map name differs from its own, 1 m from the line.
- Next gauge downstream
- North Hykeham On the River Witham · 2.6 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (22 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.3%
Sampled 6 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 80.3 | 80.3% |
| 6 Feb 2026, 09:20 | 83.4 | 83.4% |
| 16 Jan 2026, 12:23 | 83.4 | 83.4% |
| 10 Dec 2025, 11:05 | 75.8 | 75.8% |
| 10 Nov 2025, 10:24 | 57.8 | 57.8% |
| 21 Oct 2025, 11:01 | 26.4 | 26.4% |
| 8 Sep 2025, 10:16 | 40.3 | 40.3% |
| 31 Jul 2025, 10:31 | 84.2 | 84.2% |
| 26 Jun 2025, 10:08 | 79.4 | 79.4% |
| 9 May 2025, 09:34 | 86.8 | 86.8% |
| 8 Apr 2025, 11:38 | 137.5 | 137.5% |
| 12 Mar 2025, 09:17 | 98 | 98% |
| 6 Feb 2025, 14:22 | 86.2 | 86.2% |
| 8 Jan 2025, 12:03 | 78 | 78% |
| 6 Dec 2024, 09:02 | 78.1 | 78.1% |
| 6 Nov 2024, 11:14 | 86.5 | 86.5% |
| 21 Oct 2024, 11:27 | 70.1 | 70.1% |
| 12 Sep 2024, 10:16 | 74.1 | 74.1% |
| 6 Aug 2024, 11:13 | 75.6 | 75.6% |
| 3 Jul 2024, 11:22 | 65.3 | 65.3% |
| 10 Jun 2024, 09:57 | 80.6 | 80.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.47 mg/l
Sampled 6 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 9.47 | 9.47 mg/l |
| 6 Feb 2026, 09:20 | 10.5 | 10.5 mg/l |
| 16 Jan 2026, 12:23 | 10.7 | 10.7 mg/l |
| 10 Dec 2025, 11:05 | 8.81 | 8.81 mg/l |
| 10 Nov 2025, 10:24 | 6.26 | 6.26 mg/l |
| 21 Oct 2025, 11:01 | 2.81 | 2.81 mg/l |
| 8 Sep 2025, 10:16 | 4.04 | 4.04 mg/l |
| 31 Jul 2025, 10:31 | 8.08 | 8.08 mg/l |
| 26 Jun 2025, 10:08 | 7.54 | 7.54 mg/l |
| 9 May 2025, 09:34 | 9.46 | 9.46 mg/l |
| 8 Apr 2025, 11:38 | 15.3 | 15.3 mg/l |
| 12 Mar 2025, 09:17 | 12.3 | 12.3 mg/l |
| 6 Feb 2025, 14:22 | 11.3 | 11.3 mg/l |
| 8 Jan 2025, 12:03 | 10.5 | 10.5 mg/l |
| 6 Dec 2024, 09:02 | 9.54 | 9.54 mg/l |
| 6 Nov 2024, 11:14 | 9.45 | 9.45 mg/l |
| 21 Oct 2024, 11:27 | 7.61 | 7.61 mg/l |
| 12 Sep 2024, 10:16 | 8.35 | 8.35 mg/l |
| 6 Aug 2024, 11:13 | 7.21 | 7.21 mg/l |
| 3 Jul 2024, 11:22 | 6.73 | 6.73 mg/l |
| 10 Jun 2024, 09:57 | 8.63 | 8.63 mg/l |
Water temperature
code 0076 · °C
8.1 °C
Sampled 6 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 8.1 | 8.1 °C |
| 6 Feb 2026, 09:20 | 5.4 | 5.4 °C |
| 16 Jan 2026, 12:23 | 4.9 | 4.9 °C |
| 10 Dec 2025, 11:05 | 8.7 | 8.7 °C |
| 10 Nov 2025, 10:24 | 11.7 | 11.7 °C |
| 21 Oct 2025, 11:01 | 12.5 | 12.5 °C |
| 8 Sep 2025, 10:16 | 15.2 | 15.2 °C |
| 31 Jul 2025, 10:31 | 17.2 | 17.2 °C |
| 26 Jun 2025, 10:08 | 17.7 | 17.7 °C |
| 9 May 2025, 09:34 | 11.4 | 11.4 °C |
| 8 Apr 2025, 11:38 | 10.6 | 10.6 °C |
| 12 Mar 2025, 09:17 | 5.5 | 5.5 °C |
| 6 Feb 2025, 14:22 | 4.1 | 4.1 °C |
| 8 Jan 2025, 12:03 | 3.1 | 3.1 °C |
| 6 Dec 2024, 09:02 | 6.7 | 6.7 °C |
| 6 Nov 2024, 11:14 | 11.3 | 11.3 °C |
| 21 Oct 2024, 11:27 | 11.6 | 11.6 °C |
| 12 Sep 2024, 10:16 | 10 | 10 °C |
| 6 Aug 2024, 11:13 | 17.5 | 17.5 °C |
| 3 Jul 2024, 11:22 | 13.9 | 13.9 °C |
| 10 Jun 2024, 09:57 | 12.2 | 12.2 °C |
pH
code 0061
7.62
Sampled 6 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 7.62 | 7.62 |
| 6 Feb 2026, 09:20 | 7.72 | 7.72 |
| 16 Jan 2026, 12:23 | 7.65 | 7.65 |
| 10 Dec 2025, 11:05 | 7.42 | 7.42 |
| 10 Nov 2025, 10:24 | 7.24 | 7.24 |
| 21 Oct 2025, 11:01 | 7.26 | 7.26 |
| 8 Sep 2025, 10:16 | 7.47 | 7.47 |
| 31 Jul 2025, 10:31 | 7.92 | 7.92 |
| 26 Jun 2025, 10:08 | 7.84 | 7.84 |
| 9 May 2025, 09:34 | 7.82 | 7.82 |
| 8 Apr 2025, 11:38 | 8.12 | 8.12 |
| 12 Mar 2025, 09:17 | 7.91 | 7.91 |
| 6 Feb 2025, 14:22 | 7.72 | 7.72 |
| 8 Jan 2025, 12:03 | 7.18 | 7.18 |
| 6 Dec 2024, 09:02 | 7.48 | 7.48 |
| 6 Nov 2024, 11:14 | 7.8 | 7.8 |
| 21 Oct 2024, 11:27 | 7.4 | 7.4 |
| 12 Sep 2024, 10:16 | 7.74 | 7.74 |
| 6 Aug 2024, 11:13 | 7.86 | 7.86 |
| 3 Jul 2024, 11:22 | 7.72 | 7.72 |
| 10 Jun 2024, 09:57 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.078 mg/l
Sampled 6 Mar 2026, 7 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 0.078 | 0.078 mg/l |
| 6 Feb 2026, 09:20 | 0.14 | 0.14 mg/l |
| 16 Jan 2026, 12:23 | 0.055 | 0.055 mg/l |
| 10 Dec 2025, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Nov 2025, 10:24 | 0.3 | 0.3 mg/l |
| 21 Oct 2025, 11:01 | 0.038 | 0.038 mg/l |
| 8 Sep 2025, 10:16 | 0.1 | 0.1 mg/l |
| 31 Jul 2025, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jun 2025, 10:08 | 0.043 | 0.043 mg/l |
| 9 May 2025, 09:34 | 0.54 | 0.54 mg/l |
| 8 Apr 2025, 11:38 | 0.35 | 0.35 mg/l |
| 12 Mar 2025, 09:17 | 1.7 | 1.7 mg/l |
| 6 Feb 2025, 14:22 | 0.23 | 0.23 mg/l |
| 8 Jan 2025, 12:03 | 0.096 | 0.096 mg/l |
| 6 Nov 2024, 11:14 | 0.17 | 0.17 mg/l |
| 21 Oct 2024, 11:27 | 0.097 | 0.097 mg/l |
| 12 Sep 2024, 10:16 | 1.4 | 1.4 mg/l |
| 6 Aug 2024, 11:13 | 0.16 | 0.16 mg/l |
| 3 Jul 2024, 11:22 | 0.23 | 0.23 mg/l |
| 10 Jun 2024, 09:57 | 0.33 | 0.33 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.65 mg/l
Sampled 6 Mar 2026, 7 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 7.65 | 7.65 mg/l |
| 6 Feb 2026, 09:20 | 6.37 | 6.37 mg/l |
| 16 Jan 2026, 12:23 | 7.19 | 7.19 mg/l |
| 10 Dec 2025, 11:05 | 11.9 | 11.9 mg/l |
| 10 Nov 2025, 10:24 | 10.9 | 10.9 mg/l |
| 21 Oct 2025, 11:01 | 0.616 | 0.616 mg/l |
| 8 Sep 2025, 10:16 | <0.196 | below 0.196 mg/l (not detected above this) |
| 31 Jul 2025, 10:31 | 0.449 | 0.449 mg/l |
| 26 Jun 2025, 10:08 | 1.15 | 1.15 mg/l |
| 9 May 2025, 09:34 | 1.41 | 1.41 mg/l |
| 8 Apr 2025, 11:38 | 2.47 | 2.47 mg/l |
| 12 Mar 2025, 09:17 | 5.9 | 5.9 mg/l |
| 6 Feb 2025, 14:22 | 6.26 | 6.26 mg/l |
| 8 Jan 2025, 12:03 | 7.97 | 7.97 mg/l |
| 6 Nov 2024, 11:14 | 3.02 | 3.02 mg/l |
| 21 Oct 2024, 11:27 | 8.24 | 8.24 mg/l |
| 12 Sep 2024, 10:16 | 0.45 | 0.45 mg/l |
| 6 Aug 2024, 11:13 | 0.77 | 0.77 mg/l |
| 3 Jul 2024, 11:22 | 1.32 | 1.32 mg/l |
| 10 Jun 2024, 09:57 | 1.33 | 1.33 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.12 mg/l
Sampled 6 Mar 2026, 7 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 0.12 | 0.12 mg/l |
| 6 Feb 2026, 09:20 | 0.28 | 0.28 mg/l |
| 16 Jan 2026, 12:23 | 0.32 | 0.32 mg/l |
| 10 Dec 2025, 11:05 | 0.48 | 0.48 mg/l |
| 10 Nov 2025, 10:24 | 0.28 | 0.28 mg/l |
| 21 Oct 2025, 11:01 | 0.19 | 0.19 mg/l |
| 8 Sep 2025, 10:16 | 0.5 | 0.5 mg/l |
| 31 Jul 2025, 10:31 | 0.29 | 0.29 mg/l |
| 26 Jun 2025, 10:08 | 0.33 | 0.33 mg/l |
| 9 May 2025, 09:34 | 0.087 | 0.087 mg/l |
| 8 Apr 2025, 11:38 | 0.057 | 0.057 mg/l |
| 12 Mar 2025, 09:17 | 0.052 | 0.052 mg/l |
| 6 Feb 2025, 14:22 | 0.059 | 0.059 mg/l |
| 8 Jan 2025, 12:03 | 0.051 | 0.051 mg/l |
| 6 Nov 2024, 11:14 | 0.09 | 0.09 mg/l |
| 21 Oct 2024, 11:27 | 0.14 | 0.14 mg/l |
| 12 Sep 2024, 10:16 | 0.16 | 0.16 mg/l |
| 6 Aug 2024, 11:13 | 0.17 | 0.17 mg/l |
| 3 Jul 2024, 11:22 | 0.22 | 0.22 mg/l |
| 10 Jun 2024, 09:57 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
903 µS/cm
Sampled 6 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 09:54 | 903 | 903 µS/cm |
| 6 Feb 2026, 09:20 | 564 | 564 µS/cm |
| 16 Jan 2026, 12:23 | 510 | 510 µS/cm |
| 10 Dec 2025, 11:05 | 686 | 686 µS/cm |
| 10 Nov 2025, 10:24 | 646 | 646 µS/cm |
| 21 Oct 2025, 11:01 | 490 | 490 µS/cm |
| 8 Sep 2025, 10:16 | 715 | 715 µS/cm |
| 31 Jul 2025, 10:31 | 903 | 903 µS/cm |
| 26 Jun 2025, 10:08 | 966 | 966 µS/cm |
| 9 May 2025, 09:34 | 1129 | 1129 µS/cm |
| 8 Apr 2025, 11:38 | 1104 | 1104 µS/cm |
| 12 Mar 2025, 09:17 | 1120 | 1120 µS/cm |
| 6 Feb 2025, 14:22 | 1115 | 1115 µS/cm |
| 8 Jan 2025, 12:03 | 600 | 600 µS/cm |
| 6 Dec 2024, 09:02 | 726 | 726 µS/cm |
| 6 Nov 2024, 11:14 | 1090 | 1090 µS/cm |
| 21 Oct 2024, 11:27 | 690 | 690 µS/cm |
| 12 Sep 2024, 10:16 | 1368 | 1368 µS/cm |
| 6 Aug 2024, 11:13 | 1003 | 1003 µS/cm |
| 3 Jul 2024, 11:22 | 1129 | 1129 µS/cm |
| 10 Jun 2024, 09:57 | 676 | 676 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 | Jun 2024 – Mar 2026 | 80.3% 6 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Jun 2024 – Mar 2026 | 9.47 mg/l 6 Mar 2026 |
| Temperature of Water 0076 | River water | 21 | Jun 2024 – Mar 2026 | 8.1 °C 6 Mar 2026 |
| pH 0061 | River water | 21 | Jun 2024 – Mar 2026 | 7.62 6 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Jun 2024 – Mar 2026 | 0.078 mg/l 6 Mar 2026 |
| Nitrate as N 0117 | River water | 20 | Jun 2024 – Mar 2026 | 7.65 mg/l 6 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Jun 2024 – Mar 2026 | 0.12 mg/l 6 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Jun 2024 – Mar 2026 | 903 µS/cm 6 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Jun 2024 – Mar 2026 | 200 mg/l 6 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Jun 2024 – Mar 2026 | 0.00052 mg/l 6 Mar 2026 |
| Nitrite as N 0118 | River water | 20 | Jun 2024 – Mar 2026 | 0.052 mg/l 6 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Jun 2024 – Mar 2026 | 7.7 mg/l 6 Mar 2026 |
| No flow /No sample 7668 | River water | 1 | Aug 2025 – Aug 2025 | No flow/discharge at sampling point 11 Aug 2025 |
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.