sampling point
U/S Silk Willoughby Stw

Description	U/S SILK WILLOUGHBY STW
Sampling point ID	AN-USSWLBY
Type	Freshwater – Rivers
Status	open
Location	easting northing: 506165 342530 lat lon: 52.969616, -0.420596
Area	Lincolnshire And Northamptonshire
Sub-Area	North & South Team Sub Area
Summary	39 samples taken between 2024 and 2019

Determinands identify a property which can be measured on a sample or the sampling environment, together with the units in which the result of that measurement will be expressed.

14 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
BOD ATU
Chloride Ion
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
pH

Displaying the twenty most recent samples. You can see all 39 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 16 Oct 2023 to 15 Jul 2024

Notation	Determinand	Units	16 Oct 2023 10:05	20 Nov 2023 12:08	4 Dec 2023 10:40	15 Jan 2024 10:55	19 Feb 2024 14:10	18 Mar 2024 11:31	15 Apr 2024 11:12	13 May 2024 12:39	18 Jun 2024 10:50	15 Jul 2024 10:54
0061	pH		8.04	8.06	7.99	8.37	8.12	8.17	8.28	8.28	8.21	8.05
0076	Temperature of Water	°C	9.9	9.9	5.1	2.4	9.1	9.3	9.1	17.4	13.1	14.3
0077	Conductivity at 25 C	μs/cm	870	808	441	783	667	723	727	706	740	757
0085	BOD : 5 Day ATU	mg/l					1.1	1	< 2	1	1	< 4
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.038
0116	Nitrogen, Total Oxidised as N	mg/l	27	19	7.1	14	10	9.6	10	9.1	5	5.5
0117	Nitrate as N	mg/l	27	19	7.09	14	9.99	9.59	9.99	9.07	4.97	5.47
0118	Nitrite as N	mg/l	0.015	0.018	0.009	0.0092	0.008	0.013	0.013	0.028	0.035	0.029
0119	Ammonia un-ionised as N	mg/l	< 0.00054	< 0.00054	< 0.00037	< 0.00031	< 0.00051	< 0.00052	< 0.00051	< 0.00094	< 0.00069	0.00095
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	270	280	160	280	270	290	270	260	300	300
0180	Orthophosphate, reactive as P	mg/l	0.022	0.018	0.094	0.026	0.031	0.022	< 0.01	< 0.01	< 0.01	0.045
9901	Oxygen, Dissolved, % Saturation	%	88.6	92.5	95.6	92.7	96	100.5	104.9	135.7	104.6	85.1
9924	Oxygen, Dissolved as O2	mg/l	10	10.4	12.2	12.7	11.1	11.5	12.1	13	11	8.69

Samples from 3 Sep 2021 to 1 Sep 2023

Notation	Determinand	Units	3 Sep 2021 11:17	13 Oct 2021 09:54	4 Nov 2021 10:40	3 Dec 2021 12:22	19 Apr 2023 10:34	16 May 2023 12:06	21 Jun 2023 10:14	17 Jul 2023 12:07	1 Aug 2023 12:04	1 Sep 2023 10:55
0061	pH		7.82	7.94	8.09	8.13	8.25	8.19	7.64	8.18	7.87	7.65
0076	Temperature of Water	°C	14.5	11.1	7.7	5.4	9.2	12.1	16.2	15.2	15.1	14.7
0077	Conductivity at 25 C	μs/cm	676	762	747	859	788	805	691	566	719	638
0085	BOD : 5 Day ATU	mg/l	13	1.1	1.3	1.2		1	< 3
0111	Ammoniacal Nitrogen as N	mg/l	1.7	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.063	< 0.03	0.06	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	< 0.2	7.3	11	6.5	15	11	0.2	< 0.2	0.26	< 0.2
0117	Nitrate as N	mg/l	0.173	7.27	11	6.49	15	11	0.191	< 0.196	0.246	< 0.196
0118	Nitrite as N	mg/l	0.027	0.034	0.022	0.012	0.015	0.02	0.0094	< 0.004	0.014	< 0.004
0119	Ammonia un-ionised as N	mg/l	0.0287	< 0.00052	< 0.00046	< 0.00039	< 0.00052	< 0.00064	0.0008	< 0.0008	0.00119	< 0.00035
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	310	270	250	300	260	280	270	250	280	270
0180	Orthophosphate, reactive as P	mg/l	0.023	0.059	0.037	0.022	< 0.01	0.013	0.051	0.039	0.047	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	37.4	71.9	89.3	91.2	117.2	115.8	38.5	113.5	77.3	85.9
9924	Oxygen, Dissolved as O2	mg/l	3.8	7.89	10.6	11.5	13.5	12.4	3.77	11.4	7.76	8.7

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sampling point U/S Silk Willoughby Stw

Determinands

Sampling results

Samples from 16 Oct 2023 to 15 Jul 2024

Samples from 3 Sep 2021 to 1 Sep 2023

sampling point
U/S Silk Willoughby Stw