sampling point
Colne / G.U.C. Above Batchworth Lock

Description	COLNE / G.U.C. ABOVE BATCHWORTH LOCK
Sampling point ID	TH-PCNR0042
Type	Freshwater – Rivers
Status	open
Location	easting northing: 506400 194000 lat lon: 51.63475, -0.463995
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	224 samples taken between 2019 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.

41 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
AmoniaTotYSI
BOD ATU
Calcium - Ca
Chloride Ion
Cond @ 20C
Cond @ 25C
Copper - Cu
Cu Filtered
Hardness
Magnesium-Mg
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Oil & Grs Vs
Orthophospht
Oxygen Diss
PFOS
PFdecncAcid
PFdodencAcid
PFheptncAcid
PFhexncAcid
PFnonncAcid
PFoctncAcid
PFpentncAcid
PFtetdncAcid
PFundencAcid
Phenol Odour
SI-EC-F
SI-GQA
Sld Sus@105C
Temp Water
Type of Flow
Zinc - as Zn
pFoctanoate
pH
pH in-situ

Displaying the twenty most recent samples. You can see all 224 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 18 Jul 2018 to 24 Jul 2019

Notation	Determinand	Units	18 Jul 2018 08:42	3 Aug 2018 12:03	2 Oct 2018 11:10	1 Nov 2018 10:55	27 Nov 2018 11:25	3 Jan 2019 11:28	4 Feb 2019 13:58	1 Mar 2019 11:14	30 May 2019 13:33	24 Jul 2019 12:53
0061	pH		7.91	7.91	8.01	7.91	7.95	8.08	8.08	8.21	7.8	7.94
0076	Temperature of Water	°C	19	20.4	11.9	8.2	7.1	7	4.8	8.9	16.1	21.9
0077	Conductivity at 25 C	μs/cm	693	680	734	721	753	728	960	757	726	633
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.04	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	5.55	5.34	10.1	9.18	9.78	8.08	8.1	8.7	7.61	4.81
0117	Nitrate as N	mg/l	5.53	5.32	10.1	9.17	9.76	8.06	8.08	8.69	7.58	4.79
0118	Nitrite as N	mg/l	0.0249	0.022	0.0156	0.0134	0.02	0.0173	0.0226	0.0131	0.0255	0.0244
0119	Ammonia un-ionised as N	mg/l	< 0.00086	< 0.00095	< 0.00063	< 0.00039	< 0.00039	< 0.00044	0.0005	< 0.0005	< 0.00054	< 0.00113
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	248	237	234	242	241	248	209	221	238	228
0180	Orthophosphate, reactive as P	mg/l	0.07	0.097	0.141	0.17	0.215	0.153	0.185	0.095	0.151	0.089
9901	Oxygen, Dissolved, % Saturation	%	91.8	92	87.8	86.1	79.5	94.5	106.7	87.8	87.1	89.2
9924	Oxygen, Dissolved as O2	mg/l	8.49	8.28	9.46	10.1	9.61	11.5	13.7	10.2	8.56	7.8

Samples from 25 May 2017 to 13 Jun 2018

Notation	Determinand	Units	25 May 2017 12:09	6 Jul 2017 12:06	2 Aug 2017 12:21	28 Sep 2017 13:24	23 Nov 2017 12:18	8 Dec 2017 14:53	14 Feb 2018 11:29	7 Mar 2018 11:53	17 Apr 2018 09:38	13 Jun 2018 12:02
0061	pH		7.8	7.78	7.79	7.95	7.42	8.09	7.78	7.98	7.67	7.91
0076	Temperature of Water	°C	17.8	21.1	17	16.1	10.2	5.7	4.4	6.7	11.6	16.8
0077	Conductivity at 25 C	μs/cm	688	635	569	591	683	684	856	961	762	709
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.076	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	6.09	3.83	3.7	5.36	5.93	6.17	7.19	8.01	6.98	6.04
0117	Nitrate as N	mg/l	6.04	3.81	3.69	5.34	5.9	6.16	7.17	7.97	6.97	6.02
0118	Nitrite as N	mg/l	0.0455	0.0185	0.0118	0.0222	0.0314	0.0116	0.0169	0.038	0.0112	0.0197
0119	Ammonia un-ionised as N	mg/l	< 0.00062	< 0.00075	< 0.00057	< 0.00076	< 0.00015	< 0.0004	< 0.00022	0.00104	< 0.00029	< 0.00073
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	236	239	206	199	247	246	220	227	227	259
0180	Orthophosphate, reactive as P	mg/l	0.115	< 0.01	< 0.01	< 0.01	< 0.01	0.034	0.126	0.152	0.124	0.137
9901	Oxygen, Dissolved, % Saturation	%	89.4	127.9	93.8	106.6	99.6	99.6	92.4	101.2	90.7	94.8
9924	Oxygen, Dissolved as O2	mg/l	8.48	11.4	9.04	10.5	11.2	12.5	12	12.4	9.84	9.18

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sampling point Colne / G.U.C. Above Batchworth Lock

Determinands

Sampling results

Samples from 18 Jul 2018 to 24 Jul 2019

Samples from 25 May 2017 to 13 Jun 2018

sampling point
Colne / G.U.C. Above Batchworth Lock