sampling point
Houghton Brook At Leagrave

Description	HOUGHTON BROOK AT LEAGRAVE
Sampling point ID	TH-PLER0667
Type	Freshwater – Unspecified
Status	open
Location	easting northing: 505984 224445 lat lon: 51.908462, -0.460723
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	69 samples taken between 2019 and 2013

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.

12 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
pH

Displaying the twenty most recent samples. You can see all 69 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 1 Feb 2019 to 5 Dec 2019

Notation	Determinand	Units	1 Feb 2019 10:20	8 Mar 2019 12:04	4 Apr 2019 10:12	20 May 2019 15:03	4 Jun 2019 10:45	15 Jul 2019 14:18	1 Aug 2019 10:46	2 Sep 2019 12:09	16 Oct 2019 11:44	5 Dec 2019 11:10
0061	pH		7.65	7.84	7.92	7.41	7.5	7.55	7.38	7.49	7.24	8.16
0076	Temperature of Water	°C	0.9	7.7	6.2	14.8	13.8	16	15.7	14.5	12.5	5.6
0077	Conductivity at 25 C	μs/cm	1434	532	634	940	932	931	762	924	395	786
0111	Ammoniacal Nitrogen as N	mg/l	0.362	0.044	0.449	0.035	0.297	0.12	0.35	0.56	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	2.21	1.44	3.45	7.62	5.09	4.7	4.3	3.3	0.96	5.2
0117	Nitrate as N	mg/l	2.17	1.4	3.36	7.53	5.01	4.63	4.2	3.2	0.919	5.18
0118	Nitrite as N	mg/l	0.04	0.0419	0.0898	0.0892	0.0783	0.071	0.1	0.098	0.041	0.019
0119	Ammonia un-ionised as N	mg/l	0.00152	0.00047	0.00517	0.00024	0.0023	0.00122	0.00237	0.00446	< 0.00012	< 0.0004
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	92	98	144	238	254	250	210	270	140	240
0180	Orthophosphate, reactive as P	mg/l	0.051	0.03	0.026	< 0.01	0.011	< 0.01	0.069	0.023	0.076	0.041
9901	Oxygen, Dissolved, % Saturation	%	85.5	77.3	73	112	69.1	97.6	31.9	44.6	53.2	88.2
9924	Oxygen, Dissolved as O2	mg/l	12.2	9.21	9.03	11.3	7.13	9.61	3.16	4.53	5.66	11.1

Samples from 20 Apr 2018 to 3 Jan 2019

Notation	Determinand	Units	20 Apr 2018 10:49	18 May 2018 09:15	26 Jun 2018 12:10	11 Jul 2018 12:39	23 Aug 2018 11:24	7 Sep 2018 13:18	4 Oct 2018 09:56	1 Nov 2018 09:10	27 Nov 2018 10:21	3 Jan 2019 14:32
0061	pH		8.05	8.01	7.46	7.63	7.31	7.41	7.43	7.42	7.67	7.59
0076	Temperature of Water	°C	13.5	9.5	15	16.4	16.5	13.4	11.9	9.7	8.3	7.4
0077	Conductivity at 25 C	μs/cm	839	822	903	850	845	811	833	323	949	941
0111	Ammoniacal Nitrogen as N	mg/l	0.361	< 0.03	0.075	0.489	0.501	0.66	0.312	0.323	0.08	0.134
0116	Nitrogen, Total Oxidised as N	mg/l	6.85	6.33	7.56	2.84	2.55	2.69	3.33	1.07	8.52	7.93
0117	Nitrate as N	mg/l	6.81	6.31	7.51	2.45	2.4	2.57	3.23	0.968	8.47	7.86
0118	Nitrite as N	mg/l	0.0417	0.0173	0.0547	0.394	0.148	0.117	0.0986	0.102	0.0515	0.0667
0119	Ammonia un-ionised as N	mg/l	0.0085	< 0.00053	0.00058	0.00617	0.00307	0.00404	0.00179	0.00154	0.00061	0.00079
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	247	235	243	252	243	235	246	88	250	251
0180	Orthophosphate, reactive as P	mg/l	0.058	< 0.01	0.022	0.057	0.06	0.043	0.034	0.09	0.022	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	122.9	92	83.8	36.3	32.1	46.4	37.7	55.3	65.9	47.2
9924	Oxygen, Dissolved as O2	mg/l	12.8	10.5	8.43	3.54	3.13	4.83	4.06	6.28	7.74	5.66

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sampling point Houghton Brook At Leagrave

Determinands

Sampling results

Samples from 1 Feb 2019 to 5 Dec 2019

Samples from 20 Apr 2018 to 3 Jan 2019

sampling point
Houghton Brook At Leagrave