sampling point
Chess Above Valley Farm Ford

Description	CHESS ABOVE VALLEY FARM FORD
Sampling point ID	TH-PCNR0145
Type	Freshwater – Unspecified
Status	open
Location	easting northing: 502600 199000 lat lon: 51.680396, -0.517416
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	70 samples taken between 2024 and 2018

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.

20 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
BOD ATU
CHLOROPHYLL
Cond @ 25C
E.coli C-MF
IE Conf
IE Pres
N Oxidised
NATGRIDREF
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Sld Sus@105C
Temp Water
TurbidityNTU
pH

Displaying the twenty most recent samples. You can see all 70 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 1 Aug 2023 to 2 Jul 2024

Notation	Determinand	Units	1 Aug 2023 09:28	7 Sep 2023 14:27	2 Oct 2023 10:28	14 Nov 2023 11:23	7 Dec 2023 14:36	12 Jan 2024 11:49	7 Feb 2024 12:19	5 Mar 2024 11:00	4 Jun 2024 13:27	2 Jul 2024 09:28
0061	pH		7.99	7.94	7.87	7.86	7.93	8.04	7.98	7.81		7.88
0076	Temperature of Water	°C	14.9	19.7	15.1	10.6	8.5	7.6	9.3	9.4	14.5	13.8
0077	Conductivity at 25 C	μs/cm	624	630	641	610	639	628	612	622	616	626
0111	Ammoniacal Nitrogen as N	mg/l	0.031	< 0.03	< 0.03	< 0.03	0.033	< 0.03	< 0.03	0.059	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	6.4	6.8	6.6	6.3	7.8	6.9	6.4	6.6	5.9	6
0117	Nitrate as N	mg/l	6.37	6.78	6.58	6.28	7.78	6.88	6.36	6.54	5.86	5.96
0118	Nitrite as N	mg/l	0.029	0.025	0.021	0.023	0.023	0.024	0.039	0.06	0.045	0.036
0119	Ammonia un-ionised as N	mg/l	0.00079	< 0.00097	< 0.00059	< 0.00042	0.00046	< 0.00046	< 0.0005	0.00067		< 0.00055
0135	Solids, Suspended at 105 C	mg/l	4.8	5	5.4	6.5	6	4.8	5.2	4.2	3.7	5.8
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	250	240	260	240	250	260	240	260	250	250
0180	Orthophosphate, reactive as P	mg/l	0.15	0.13	0.22	0.24	0.25	0.18	0.2	0.15	0.079	0.055
6396	Turbidity	ntu	1.7	1.2	2.5	1.8	2.3	2.2	1.6	1.1	2.2	< 1
7887	Chlorophyll : Acetone Extract	μg/l	3.5	4.2	2.5	2	1.6	1.2	2.6	2.1	1.6	1.7
9901	Oxygen, Dissolved, % Saturation	%	100.1	106.3	88.4	91.2	92.7	92.8	95.7	93.3	93.9	85.1
9924	Oxygen, Dissolved as O2	mg/l	10.1	9.7	8.87	10.1	10.8	11.1	11	10.7	9.55	8.79

Samples from 7 Oct 2022 to 4 Jul 2023

Notation	Determinand	Units	7 Oct 2022 14:12	1 Nov 2022 08:54	13 Dec 2022 11:01	19 Jan 2023 13:21	10 Feb 2023 13:23	1 Mar 2023 09:38	19 Apr 2023 12:36	31 May 2023 10:11	2 Jun 2023 09:01	4 Jul 2023 09:34
0061	pH		7.95	8.02	8.15	8.02	8.05	8.03	8.74	8.03	7.92	8.09
0076	Temperature of Water	°C	14.5	12.3	4.3	6	8.6	7	11.5	13.1	12.5	14.5
0077	Conductivity at 25 C	μs/cm	673	662	666	645	660	650	621	607	616	662
0111	Ammoniacal Nitrogen as N	mg/l	1.4	< 0.03	0.049	0.037	0.055	< 0.03	< 0.03	< 0.03	0.037	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	7.5	9.3	9.4	8.3	8.9	8	7.1	6.5	6.4	6.4
0117	Nitrate as N	mg/l	6.1	9.27	9.37	8.28	8.87	7.98	7.08	6.48	6.36	6.38
0118	Nitrite as N	mg/l	1.4	0.031	0.028	0.025	0.027	0.022	0.016	0.025	0.036	0.024
0119	Ammonia un-ionised as N	mg/l	0.0317	< 0.00065	0.00059	0.0005	0.00091	< 0.00044	< 0.00061	< 0.00069	0.00068	< 0.00076
0135	Solids, Suspended at 105 C	mg/l	6.7	8.5	4.1	10	12	8.8	8.3	12	8	5.2
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	260	240	270	250	240	260	250	240	250	250
0180	Orthophosphate, reactive as P	mg/l	0.17	0.33	0.24	0.16	0.19	0.19	0.12	0.14	0.16	0.19
6396	Turbidity	ntu	3.2				1.7	< 1	1.3	2.3	2.5	1.1
7887	Chlorophyll : Acetone Extract	μg/l	4.3	2.9	1.6	2.3	3.4	3.9		3.2	4	2.1
9901	Oxygen, Dissolved, % Saturation	%	84.3	83.1	94.3	97.3	98.1	99.1	114.3	97.2	96.1	97.3
9924	Oxygen, Dissolved as O2	mg/l	8.57	8.87	12.2	12.1	11.4	12	12.4	10.2	10.2	9.89

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sampling point Chess Above Valley Farm Ford

Determinands

Sampling results

Samples from 1 Aug 2023 to 2 Jul 2024

Samples from 7 Oct 2022 to 4 Jul 2023

sampling point
Chess Above Valley Farm Ford