sampling point
Stort Above Roydon At Briggens

Description	STORT ABOVE ROYDON AT BRIGGENS
Sampling point ID	TH-PLER0257
Type	Freshwater – Unspecified
Status	closed
Location	easting northing: 541700 211300 lat lon: 51.782421, 0.05278
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	39 samples taken between 2010 and 2007

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)
Cond @ 20C
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
Type of Flow
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 9 Jun 2009 to 12 Mar 2010

Notation	Determinand	Units	9 Jun 2009 10:25	3 Aug 2009 13:10	20 Aug 2009 08:30	8 Sep 2009 09:40	15 Oct 2009 13:35	9 Nov 2009 12:50	1 Dec 2009 11:35	20 Jan 2010 13:15	15 Feb 2010 13:35	12 Mar 2010 08:45
0061	pH		8.05	7.9	8.03	8.16	7.88	7.9	7.85	7.86	8.15	8.18
0076	Temperature of Water	°C	14.48	18.12	19.17	16.68	11.77	8.25	5.98	4.29	3.43	4.29
0077	Conductivity at 25 C	μs/cm	801	679	769	885	849	747	592	788	883	852
0111	Ammoniacal Nitrogen as N	mg/l	0.088	0.032	< 0.03	< 0.03	< 0.03	0.032	0.043	< 0.03	0.033	0.097
0116	Nitrogen, Total Oxidised as N	mg/l	7.7	5.82	5.82	9.6	7.79	7.42	13	12.2	10.2	10
0117	Nitrate as N	mg/l	7.65	5.8	5.8	9.58	7.77	7.39	13	12.2	10.2	9.97
0118	Nitrite as N	mg/l	0.0528	0.0161	0.0152	0.0189	0.0183	0.0253	0.0244	0.0376	0.0289	0.0333
0119	Ammonia un-ionised as N	mg/l	0.00223	0.00084	< 0.00107	< 0.00089	< 0.00047	0.00041	0.00041	< 0.00026	0.00037	0.00116
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	233	219	232	261	239	219	187	236	260	267
0180	Orthophosphate, reactive as P	mg/l	1.24	1.11	1.11	1.49	1.59	1.52	0.35	0.236	0.657	0.445
9901	Oxygen, Dissolved, % Saturation	%	78	80	85	96	81	80	91	92	96	93
9924	Oxygen, Dissolved as O2	mg/l	7.93	7.54	7.84	9.32	8.76	9.4	11.3	12	12.8	12.1

Samples from 27 Aug 2008 to 19 May 2009

Notation	Determinand	Units	27 Aug 2008 12:55	23 Sep 2008 12:15	1 Oct 2008 12:50	11 Nov 2008 08:35	10 Dec 2008 08:25	23 Jan 2009 12:10	17 Feb 2009 10:40	10 Mar 2009 09:05	15 Apr 2009 09:45	19 May 2009 14:00
0061	pH		7.69	8.12	8.11	8.07	8.15	8.15	8.1	8.22	8.25	8.07
0076	Temperature of Water	°C	17.25	13.33	12.54	8.66	3.09	5.05	5.73	6.93	12.25	14.57
0077	Conductivity at 25 C	μs/cm	788	861	898	755	883	788	809	846	852	863
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.309	0.038	0.161	< 0.03	0.033	< 0.03	< 0.03	0.033
0116	Nitrogen, Total Oxidised as N	mg/l	5.88	7.64	9.32	10	9.61	12.6	9.97	8.93	7.59	7.99
0117	Nitrate as N	mg/l	5.86	7.63	9.27	9.96	9.56	12.6	9.94	8.89	7.56	7.95
0118	Nitrite as N	mg/l	0.0156	0.0101	0.0527	0.0438	0.0481	0.027	0.0292	0.0406	0.0251	0.0379
0119	Ammonia un-ionised as N	mg/l	< 0.00046	< 0.0007	0.00679	0.00063	0.00177	< 0.00038	0.00044	< 0.00044	< 0.00065	0.00084
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	226	262	271	221	242	211	248	266	270	265
0180	Orthophosphate, reactive as P	mg/l	1.18	1.36	1.53	0.854	0.619	0.332	0.208	0.444	0.776	1.13
9901	Oxygen, Dissolved, % Saturation	%	74	85	71	88.8	83	92	96	94	98	89
9924	Oxygen, Dissolved as O2	mg/l	7.1	8.87	7.54	10.3	11.1	11.7	12	11.4	10.5	9.04

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sampling point Stort Above Roydon At Briggens

Determinands

Sampling results

Samples from 9 Jun 2009 to 12 Mar 2010

Samples from 27 Aug 2008 to 19 May 2009

sampling point
Stort Above Roydon At Briggens