sampling point
Old River Chess At Latimer Park Farm

Description	OLD RIVER CHESS AT LATIMER PARK FARM
Sampling point ID	TH-PCNR0207
Type	Freshwater – Rivers
Status	closed
Location	easting northing: 499974 198598 lat lon: 51.677256, -0.5555
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	133 samples taken between 2012 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.

19 determinands have been measured at this site

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

Displaying the twenty most recent samples. You can see all 133 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 9 Mar 2012 to 22 Nov 2012

Notation	Determinand	Units	9 Mar 2012 13:45	10 Apr 2012 14:18	8 May 2012 13:08	8 Jun 2012 10:22	19 Jul 2012 11:59	10 Aug 2012 11:50	30 Aug 2012 12:45	8 Oct 2012 18:11	24 Oct 2012 13:01	22 Nov 2012 10:23
0061	pH		7.88	8.1	7.96	8.34	7.7	7.88	7.85	7.66	7.78	7.72
0076	Temperature of Water	°C	9.18	12	12.5	13.8	14.3	15.8	14.6	12.3	13.1	10.3
0077	Conductivity at 25 C	μs/cm	762	795	684	589	637	651	638	628	675	614
0111	Ammoniacal Nitrogen as N	mg/l	0.098	0.16	0.134	0.21	0.064	0.055	0.08	0.11	0.07	0.15
0116	Nitrogen, Total Oxidised as N	mg/l	4.83	9.93	10.9	4.64	6.39	3.34	3.49	8.46	10.7	5.62
0117	Nitrate as N	mg/l	4.77	9.84	10.8	4.55	6.37	3.33	3.46	8.44	10.7	5.56
0118	Nitrite as N	mg/l	0.0631	0.0885	0.0873	0.0897	0.0228	0.0114	0.0343	0.0154	0.0201	0.0637
0119	Ammonia un-ionised as N	mg/l	0.00128	0.00338	0.00268	0.00506	0.00081	0.00117	0.00146	0.0011	0.00097	0.00148
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	251	229	230	228	241	251	241	226	231	237
0180	Orthophosphate, reactive as P	mg/l	0.758	0.608	0.476	0.217	0.311	0.347	0.3	0.309	0.306	0.29
9901	Oxygen, Dissolved, % Saturation	%	94.2	102.8	103.3	88.2	85	91.5	82.6	78	75.1	79
9924	Oxygen, Dissolved as O2	mg/l	10.8	11.1	11	9.11	8.68	9.05	8.38	8.33	7.88	8.84

Samples from 10 May 2011 to 15 Feb 2012

Notation	Determinand	Units	10 May 2011 13:00	8 Jun 2011 12:40	11 Jul 2011 12:40	2 Aug 2011 12:20	16 Sep 2011 14:20	11 Oct 2011 13:00	9 Nov 2011 12:20	24 Nov 2011 11:54	24 Jan 2012 11:55	15 Feb 2012 12:36
0061	pH		7.97	8.05	7.94	8.2	7.96	7.87	7.82	7.79	7.92	7.88
0076	Temperature of Water	°C	14.71	14.18	17.06	19.5	15.53	14.3	12.34	10.41	6.55	7.99
0077	Conductivity at 25 C	μs/cm	656	695	712	550	740	715	717	703	691	761
0111	Ammoniacal Nitrogen as N	mg/l	0.387	0.088	0.079	0.074	0.063	0.053	0.064	0.056	0.11	0.08
0116	Nitrogen, Total Oxidised as N	mg/l	3.74	11.8	12.3	6.01	12.2	10.6	9.19	6.62	11.1	8.84
0117	Nitrate as N	mg/l	3.61	11.7	12.2	5.97	12.2	10.6	9.13	6.59	11	8.78
0118	Nitrite as N	mg/l	0.133	0.0653	0.0901	0.043	0.0262	0.0325	0.0566	0.0298	0.1	0.0642
0119	Ammonia un-ionised as N	mg/l	0.00931	0.00218	0.00211	0.00269	0.00157	0.00099	0.00092	0.00065	0.0013	0.00096
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	252	224	229	199	225	242	240	249	220	242
0180	Orthophosphate, reactive as P	mg/l	0.694	0.762	1	0.266	0.49	0.511	0.685	0.457	0.525	0.506
9901	Oxygen, Dissolved, % Saturation	%	99.5	99.1	104.2	119.1	99.2	91.3	85.6	90.3	92.9	97.5
9924	Oxygen, Dissolved as O2	mg/l	10.1	10.1	10	10.9	9.86	9.32	9.13	10.1	11.4	11.5

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sampling point Old River Chess At Latimer Park Farm

Determinands

Sampling results

Samples from 9 Mar 2012 to 22 Nov 2012

Samples from 10 May 2011 to 15 Feb 2012

sampling point
Old River Chess At Latimer Park Farm