sampling point
Offwell Brook At West Colwell

Description	OFFWELL BROOK AT WEST COLWELL
Sampling point ID	SW-70221275
Type	Freshwater – Rivers
Status	open
Location	easting northing: 319229 98873 lat lon: 50.783781, -3.147107
Area	Devon And Cornwall
Sub-Area	East Devon And Cornwall
Summary	122 samples taken between 2017 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.

29 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
Calcium - Ca
Cond @ 25C
Cu Filtered
Hardness
Hdnss Ca
Hdnss Mg
Magnesium-Mg
N Inorganic
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
OrthophsFilt
OrthophsFilt
Oxygen Diss
Phosphorus-P
Potassium- K
Sld Sus@105C
Temp Water
Type of Flow
WethPresPrec
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 122 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 17 Dec 2014 to 2 Feb 2017

Notation	Determinand	Units	17 Dec 2014 10:58	17 Mar 2015 14:02	10 Jun 2015 14:35	14 Sep 2015 10:52	25 Nov 2015 13:22	11 Jan 2016 09:46	13 Apr 2016 10:16	18 Jul 2016 11:35	10 Oct 2016 13:34	2 Feb 2017 13:18
0061	pH		7.5	8.1	7.46	7.6	7.76	7.52	7.5	8.1	7.8	7.65
0076	Temperature of Water	°C	8.4	8.1	11.6	13	9.5	6.8	8.4	15.5	10.3	8.8
0077	Conductivity at 25 C	μs/cm	157	173	162	154	156	166	148	175	178	157
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	0.034	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	1.91	1.53	1.39	2.64	1.35	1.61	1.29	1.3	1.17	1.81
0117	Nitrate as N	mg/l	1.91	1.53	1.39	2.63	1.35	1.61	1.29	1.29	1.17	1.81
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	0.0083	< 0.004	< 0.004	< 0.004	0.0059	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00016	< 0.00048	< 0.00018	0.00031	< 0.00031	< 0.00014	< 0.00016	< 0.00082	< 0.00036	< 0.00023
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	35	33	29	37	29	29	20	34	34	35
0180	Orthophosphate, reactive as P	mg/l	0.018	0.012	0.024	0.064	0.012	0.027	< 0.01	0.045	0.026	0.079
9901	Oxygen, Dissolved, % Saturation	%	95.4	98	89.9	98	96.9	95	100	98	95	99.4
9924	Oxygen, Dissolved as O2	mg/l	11.2	11.6	9.76	10.3	11	11.6	11.7	9.75	10.6	11.5

Samples from 4 Oct 2012 to 13 Aug 2014

Notation	Determinand	Units	4 Oct 2012 13:32	22 Oct 2012 12:38	23 Nov 2012 13:45	7 Jan 2013 15:12	18 Apr 2013 08:37	1 Jul 2013 12:54	3 Oct 2013 11:25	12 Feb 2014 10:11	7 May 2014 10:58	13 Aug 2014 09:03
0061	pH		7.6	7.6	7.5	7.6	7.83	7.6	7.9	7.3	7.6	7.5
0076	Temperature of Water	°C	10.8	11.1	9.6	8.4	8.6	13.4	14.9	6.6	11.1	12.9
0077	Conductivity at 25 C	μs/cm	150	151	162	159	152	155	183	145	156	159
0111	Ammoniacal Nitrogen as N	mg/l	0.054	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.093	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	1.15	1.15	1.4	1.35	1.11	1.31	1.18	1	1.02	1.1
0117	Nitrate as N	mg/l	1.15	1.15	1.4	1.35	1.11	1.31	1.16	0.996	1.02	1.1
0118	Nitrite as N	mg/l	< 0.004	< 0.004	0.0041	< 0.004	< 0.004	< 0.004	0.0176	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	0.00042	< 0.00024	< 0.00017	< 0.0002	< 0.00034	< 0.00028	0.00194	< 9.0e-05	< 0.00024	< 0.00022
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	21	29	40	35	31	24	48	27	31	24
0180	Orthophosphate, reactive as P	mg/l	< 0.02	< 0.02	0.047	< 0.02	< 0.02	< 0.02	0.07	0.03	< 0.02	< 0.02
9901	Oxygen, Dissolved, % Saturation	%	98	93.3	102	101	105	100	96	96	95	96
9924	Oxygen, Dissolved as O2	mg/l	10.8	10.2	11.6	11.8	12.2	10.4	9.68	11.8	10.4	10.1

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sampling point Offwell Brook At West Colwell

Determinands

Sampling results

Samples from 17 Dec 2014 to 2 Feb 2017

Samples from 4 Oct 2012 to 13 Aug 2014

sampling point
Offwell Brook At West Colwell