sampling point
Chess At Road Bridge, Latimer

Description	CHESS AT ROAD BRIDGE, LATIMER
Sampling point ID	TH-PCNR0019
Type	Freshwater – Rivers
Status	open
Location	easting northing: 500445 198564 lat lon: 51.676866, -0.5487
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	226 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.

22 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
AmoniaTotYSI
BOD ATU
CHLOROPHYLL
Chloride Ion
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
SI-GQA
Sld Sus@105C
Temp Water
TurbidityNTU
Type of Flow
pH
pH in-situ

Displaying the twenty most recent samples. You can see all 226 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 10 Oct 2023 to 2 Jul 2024

Notation	Determinand	Units	10 Oct 2023 12:41	3 Nov 2023 11:02	5 Dec 2023 11:30	10 Jan 2024 13:01	7 Feb 2024 11:34	5 Mar 2024 11:39	4 Apr 2024 11:45	3 May 2024 09:51	4 Jun 2024 12:22	2 Jul 2024 14:27
0061	pH		7.9	7.93	7.81	7.94	8.11	7.72				7.82
0076	Temperature of Water	°C	15	11	8.3	7	9.2	9.9			14.6	14.5
0077	Conductivity at 25 C	μs/cm	671	574	626		582	652			604	645
0111	Ammoniacal Nitrogen as N	mg/l	0.038	0.053	0.044	0.059	0.039	0.44			0.17	0.074
0116	Nitrogen, Total Oxidised as N	mg/l	9.1	6	7.4	7.9	5.5	6.8			5.2	6.8
0117	Nitrate as N	mg/l	9.08	5.97	7.37	7.87	5.47	6.69			5.1	6.74
0118	Nitrite as N	mg/l	0.025	0.026	0.026	0.034	0.031	0.11			0.1	0.059
0119	Ammonia un-ionised as N	mg/l	0.0008	0.00089	0.00046	0.00075	0.00067	0.00422				0.00125
0135	Solids, Suspended at 105 C	mg/l	10	8	6.9	7.9	4.8	7.6	6.4	27	< 3	5.6
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	240	230	240	250	250	260			250	250
0180	Orthophosphate, reactive as P	mg/l	0.56	0.23	0.27	0.22	0.13	0.19			0.057	0.048
7887	Chlorophyll : Acetone Extract	μg/l	< 0.5	0.78	1.3	1.2	5.7	2.3	4.8	9.2	2.6	3.5
9901	Oxygen, Dissolved, % Saturation	%	96.1	92.6	91	89.1	96.7	81.2			86.9	96.1
9924	Oxygen, Dissolved as O2	mg/l	9.67	10.2	10.7	10.8	11.1	9.17			8.82	9.77

Samples from 13 Dec 2022 to 5 Sep 2023

Notation	Determinand	Units	13 Dec 2022 11:35	25 Jan 2023 11:41	10 Feb 2023 12:39	1 Mar 2023 10:23	20 Apr 2023 08:55	4 May 2023 13:24	2 Jun 2023 14:55	6 Jul 2023 14:34	1 Aug 2023 10:00	5 Sep 2023 11:23
0061	pH		8.09	7.87	7.92	7.87	7.99	8.05	7.97	7.86	7.89	7.86
0076	Temperature of Water	°C	4.7	7.9	7.5	8.2	9.9	13.7	15.1	16	15.1	16.5
0077	Conductivity at 25 C	μs/cm	671	711	656	669	633	633	636	623	628	663
0111	Ammoniacal Nitrogen as N	mg/l	0.081	0.058	0.074	0.058	< 0.03	0.045	0.058	0.042	0.057	0.045
0116	Nitrogen, Total Oxidised as N	mg/l	10	14	9.1	10	8.4	8	7.4	7.5	6.9	8.5
0117	Nitrate as N	mg/l	9.97	14	9.07	9.96	8.38	7.96	7.35	7.47	6.87	8.47
0118	Nitrite as N	mg/l	0.031	0.049	0.029	0.039	0.025	0.042	0.046	0.033	0.034	0.033
0119	Ammonia un-ionised as N	mg/l	0.001	0.00068	0.00094	0.00069	< 0.00053	0.00108	0.00143	0.00087	0.00118	0.00096
0135	Solids, Suspended at 105 C	mg/l	38	15	9.4	8.2	7.4	7	7.8	< 3	15	17
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	260	230	240	240	240	240	250	240	250	240
0180	Orthophosphate, reactive as P	mg/l	0.27	0.26	0.2	0.27	0.15	0.18	0.2	0.25	0.16	0.17
7887	Chlorophyll : Acetone Extract	μg/l	3.7	4.2	3	2.9	10	6.5	3.5	5	4.5	9
9901	Oxygen, Dissolved, % Saturation	%	91.6	93.1	93.3	94.9	105.2	113.3	108	101.7	96.2	97.6
9924	Oxygen, Dissolved as O2	mg/l	11.8	11	11.2	11.2	11.9	11.7	10.8	10	9.65	9.51

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sampling point Chess At Road Bridge, Latimer

Determinands

Sampling results

Samples from 10 Oct 2023 to 2 Jul 2024

Samples from 13 Dec 2022 to 5 Sep 2023

sampling point
Chess At Road Bridge, Latimer