sampling point
Rib Above Westmill Trout Farm ( Intake )

Description	RIB ABOVE WESTMILL TROUT FARM ( INTAKE )
Sampling point ID	TH-PLER0121
Type	Freshwater – Comparative Inlet Points
Status	open
Location	easting northing: 534150 216350 lat lon: 51.829659, -0.054647
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	175 samples taken between 2024 and 2000

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.

21 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
Chloride Ion
Cond @ 25C
N Oxidised
NH3 un-ion
NO FLOW/SAMP
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
SI-E
SI-GQA
Sld Sus@105C
Temp Water
Type of Flow
pH
pH in-situ

Displaying the twenty most recent samples. You can see all 175 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 19 Jul 2022 to 12 Feb 2024

Notation	Determinand	Units	19 Jul 2022 09:47	17 Oct 2022 13:11	1 Nov 2022 12:36	16 Feb 2023 11:41	20 Mar 2023 10:42	21 Jun 2023 09:49	24 Aug 2023 11:16	3 Oct 2023 10:55	7 Dec 2023 10:03	12 Feb 2024 12:12
0061	pH		8.08	8.28	8.18	8.2	8.16	7.74	8.17	7.92	8.27	7.98
0076	Temperature of Water	°C	19.6	13	12.9	9.3	8.9	16.7	16.4	14.8	5.6	7.6
0085	BOD : 5 Day ATU	mg/l	< 3	4.3	1.2	1.6	< 1	< 3	< 2	< 3	1.4	1.8
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.1	< 0.03	< 0.03	< 0.03	0.055
0116	Nitrogen, Total Oxidised as N	mg/l	5.8	6.7	5.6	8	10	5.1	7.2	7.1	13	9.1
0119	Ammonia un-ionised as N	mg/l	< 0.0011	< 0.00068	< 0.00068	< 0.00052	< 0.0005	0.00166	< 0.00087	< 0.00065	< 0.0004	0.0008
0135	Solids, Suspended at 105 C	mg/l	24	19	10	10	13	9.6	10	26	9.3	24
0172	Chloride	mg/l	35	34	33	33	27	30	32	34	27	22
0180	Orthophosphate, reactive as P	mg/l	0.51	0.49	0.44	0.26	0.19	0.28	0.36	0.39	0.17	0.13
9901	Oxygen, Dissolved, % Saturation	%	70.5	92.6	83.2	90.7	96	62.6	81.3	71.3	92.7	92.8
9924	Oxygen, Dissolved as O2	mg/l	6.44	9.73	8.76	10.4	11.1	6.07	7.93	7.2	11.6	11.1

Samples from 10 Jun 2021 to 30 Jun 2022

Notation	Determinand	Units	10 Jun 2021 11:13	26 Jul 2021 16:14	27 Oct 2021 13:13	25 Nov 2021 11:35	29 Nov 2021 10:22	2 Dec 2021 10:54	19 Jan 2022 10:46	3 Mar 2022 12:14	16 Mar 2022 11:28	30 Jun 2022 09:49
0061	pH		8.12	7.77	8.22	8.13	8.23	8.23	8.1	8.12	8.15	8.18
0076	Temperature of Water	°C	16.6	17.1	12.1	5.8	2.6	5.6	5.3	7.4	9.5	15.5
0077	Conductivity at 25 C	μs/cm	745	585	720	737		763			754
0085	BOD : 5 Day ATU	mg/l	< 1	2	< 1	1.6	1.4	< 1	1.5	< 3	< 3	4
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.039	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.045	< 0.03	0.056
0116	Nitrogen, Total Oxidised as N	mg/l	7	8	7.2	8.1	8.2	7.9	8.7	12	7.9	6.5
0117	Nitrate as N	mg/l	6.98	7.97	7.19	8.09		7.89			7.89
0118	Nitrite as N	mg/l	0.023	0.033	0.012	0.0083		0.01			0.0081
0119	Ammonia un-ionised as N	mg/l	< 0.00089	0.00071	< 0.00064	< 0.0004	< 0.00032	< 0.0004	< 0.00039	0.00068	< 0.00053	0.00153
0135	Solids, Suspended at 105 C	mg/l		28			4		10			130
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	270	210	280	280		280			290
0172	Chloride	mg/l		26			39		33	25		33
0180	Orthophosphate, reactive as P	mg/l	0.41	0.39	0.34	0.43	0.46	0.37	0.27	0.14	0.23	0.41
9901	Oxygen, Dissolved, % Saturation	%	75.7	81.3	82.5	87.3	92.1	88.3	95	93.3	92.1	84.5
9924	Oxygen, Dissolved as O2	mg/l	7.36	7.82	8.85	10.9	12.5	11.1	12	11.2	10.5	8.41

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sampling point Rib Above Westmill Trout Farm ( Intake )

Determinands

Sampling results

Samples from 19 Jul 2022 to 12 Feb 2024

Samples from 10 Jun 2021 to 30 Jun 2022

sampling point
Rib Above Westmill Trout Farm ( Intake )