sampling point
Colne Brook At Wraysbury Road

Description	COLNE BROOK AT WRAYSBURY ROAD
Sampling point ID	TH-PCNR0421
Type	Freshwater – Unspecified
Status	open
Location	easting northing: 501737 172706 lat lon: 51.444212, -0.537495
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	49 samples taken between 2017 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.

35 determinands have been measured at this site

4-nonPhenol
Alky pH 4.5
Ammonia(N)
C - Org Filt
Ca Filtered
Calcium - Ca
Cd Filtered
Cond @ 25C
Cr- Filtered
Cu BLM Bio
Cu Filtered
Fe- Filt
Hardness
Magnesium-Mg
Mn BLM Bio
Mn- Filtered
N Oxidised
NH3 un-ion
Ni BLM Bio
Ni- Filtered
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Pb BLM Bio
Pb Filtered
Sld Sus@105C
Temp Water
TriBT Cation
Triclosan
Zn BLM Bio
Zn- Filtered
pH
ptOctylPheno

Displaying the twenty most recent samples. You can see all 49 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 18 Mar 2016 to 19 Apr 2017

Notation	Determinand	Units	18 Mar 2016 08:57	23 May 2016 13:50	23 Jun 2016 14:36	14 Jul 2016 15:00	15 Sep 2016 12:42	28 Oct 2016 10:53	17 Nov 2016 12:14	19 Jan 2017 10:23	15 Feb 2017 10:36	19 Apr 2017 09:51
0052	Lead, Dissolved	μg/l	0.254
0061	pH		8.24	8.2	8	8.18	8.11	8.07	8.06	7.91	8.06	8.23
0076	Temperature of Water	°C	7.8	16.3	18.4	17.5	19.2	12.3	10.9	4.2	7.6	10.8
0077	Conductivity at 25 C	μs/cm	822	799	685	825	853	871	828	847	867	844
0106	Cadmium, Dissolved	μg/l	0.0215
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.039	0.033	< 0.03	< 0.03	< 0.03	< 0.03	0.064	0.038	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	11.1	8.34	6.89	9.85	11	11.2	10.1	10.3	11.1	12
0117	Nitrate as N	mg/l	11.1	8.3	6.86	9.83	11	11.2	10.1	10.3	11.1	12
0118	Nitrite as N	mg/l	0.0144	0.0398	0.0276	0.0161	0.0143	0.0142	0.0269	0.0399	0.0342	0.0107
0119	Ammonia un-ionised as N	mg/l	< 0.00047	0.00113	0.00111	< 0.00094	< 0.00107	< 0.00065	< 0.00058	0.00062	0.00058	< 0.00058
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	215	228	191	222	226	225	226	213	226	213
0180	Orthophosphate, reactive as P	mg/l	0.116	0.268	0.349	0.344	0.443	0.338	0.348	0.343	0.244	0.298
0239	Calcium, Dissolved	mg/l	108
0301	Carbon, Organic, Dissolved as C :- {DOC}	mg/l	3.95
3377	Lead : BLM Bioavailable	μg/l	0.06
3408	Zinc, Dissolved	μg/l	7.98
3409	Chromium, Dissolved	μg/l	< 0.5
3410	Nickel, Dissolved	μg/l	2.44
3878	Nickel : BLM Bioavailable	μg/l	1.39
4820	Manganese : BLM Bioavailable	μg/l	9.99
4821	Copper : BLM Bioavailable	μg/l	0.42
4822	Zinc : BLM Bioavailable	μg/l	3.38
5889	Triclosan	μg/l	< 0.01
6450	Copper, Dissolved	μg/l	3.45
6458	Manganese, Dissolved	μg/l	11.2
6460	Iron, Dissolved	μg/l	37.4
8944	Tributyl Tin as Cation	μg/l	< 0.0002
9190	4-Nonylphenol Branched	μg/l	< 0.04
9901	Oxygen, Dissolved, % Saturation	%	85.3	100.6	84.2	108.5	92.2	87.7	89	92.6	100.6	91.2
9924	Oxygen, Dissolved as O2	mg/l	10.1	9.84	7.89	10.4	8.5	9.37	9.82	12.1	12	10.1

Samples from 28 May 2015 to 26 Feb 2016

Notation	Determinand	Units	28 May 2015 09:06	16 Jun 2015 15:49	2 Jul 2015 14:14	6 Aug 2015 13:58	8 Sep 2015 12:49	28 Oct 2015 11:07	13 Nov 2015 11:08	7 Dec 2015 12:52	19 Jan 2016 12:51	26 Feb 2016 09:44
0052	Lead, Dissolved	μg/l	0.308	0.269	0.242	0.26	0.255	0.262	0.359	0.281	0.324	0.365
0061	pH		8.09	8.27	8.14	8.07	8.2	8.07	8.03	8.03	8.05	8.29
0076	Temperature of Water	°C	15.3	17.5	23	17.9	14.6	12.9	12	11.9	5.3	6
0077	Conductivity at 25 C	μs/cm	801	795	873	860	853	897	873	891	846	838
0106	Cadmium, Dissolved	μg/l	0.0323	0.0336	0.0404	0.0335	0.0353	0.0398	0.0413	0.0376	0.0212	0.0253
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.046	< 0.03	< 0.03	< 0.03	0.047	0.045	0.087	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	10.5	8.7	11.2	12.9	12.1	12.3	10.8	14	8.08	10
0117	Nitrate as N	mg/l	10.5	8.68	11.2	12.9	12.1	12.3	10.8	14	7.99	9.98
0118	Nitrite as N	mg/l	0.017	0.0232	0.0294	0.0219	0.0156	0.0195	0.0337	0.0305	0.0873	0.0199
0119	Ammonia un-ionised as N	mg/l	< 0.00081	< 0.00094	0.00215	< 0.00097	< 0.00077	< 0.00068	0.00099	0.00094	0.00112	< 0.00041
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	227	222	222	210	217	220	221	206	234	217
0180	Orthophosphate, reactive as P	mg/l	0.441	0.561	0.498	0.404	0.416	0.484	0.397	0.31	0.205	0.161
0239	Calcium, Dissolved	mg/l	114	106	119	115	107	114	109	112	107	107
0301	Carbon, Organic, Dissolved as C :- {DOC}	mg/l	3.85	4.04	4.2	3.98	3.99	4.17	4.89	4.8	5.07	4.12
3377	Lead : BLM Bioavailable	μg/l						0.06	0.07	0.06	0.06	0.09
3408	Zinc, Dissolved	μg/l	10.5	7.48	7.79	7.66	8.66	10.9	11.2	10	9.07	9.01
3409	Chromium, Dissolved	μg/l	0.669	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5
3410	Nickel, Dissolved	μg/l	2.7	2.75	3.36	2.67	2.66	2.72	3.06	3.09	2.42	2.68
3878	Nickel : BLM Bioavailable	μg/l						1.21	1.2	1.22	0.95	1.61
4820	Manganese : BLM Bioavailable	μg/l						3.21	2.97	2.97	10.4	12.6
4821	Copper : BLM Bioavailable	μg/l						0.37	0.31	0.31	0.21	0.41
4822	Zinc : BLM Bioavailable	μg/l						4.47	4.22	3.8	3.34	3.73
5889	Triclosan	μg/l	< 0.01	0.0114	< 0.01	< 0.01	0.0165	< 0.01	0.0115	0.0129	0.018	0.0124
6450	Copper, Dissolved	μg/l	3.62	3.62	4.1	4.02	4.1	4.18	4.48	4.4	3.17	3.31
6458	Manganese, Dissolved	μg/l	< 10	< 10	< 10	< 10	< 10	< 10	< 10	< 10	16.8	12.8
6460	Iron, Dissolved	μg/l	< 30	< 30	< 30	< 30	30.2	34.9	48.8	54.4	42.7	39
8944	Tributyl Tin as Cation	μg/l	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002	< 0.0002
9190	4-Nonylphenol Branched	μg/l	< 0.04	0.0482	< 0.04	< 0.04	< 0.04	< 0.04	< 0.04	< 0.04	< 0.04	< 0.04
9901	Oxygen, Dissolved, % Saturation	%	83	100.5	87.5	98.5	93.1	94.8	87	92.9	101	84.4
9924	Oxygen, Dissolved as O2	mg/l	8.29	9.59	7.49	9.32	9.45	9.99	9.35	10	12.8	10.5

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sampling point Colne Brook At Wraysbury Road

Determinands

Sampling results

Samples from 18 Mar 2016 to 19 Apr 2017

Samples from 28 May 2015 to 26 Feb 2016

sampling point
Colne Brook At Wraysbury Road