sampling point
River Menalhyl D/S St. Columb Stw

Description	RIVER MENALHYL BELOW ST. COLUMB STW
Sampling point ID	SW-82511149
Type	Freshwater – Rivers
Status	open
Location	easting northing: 190506 64100 lat lon: 50.439267, -4.95163
Area	Devon And Cornwall
Sub-Area	West Devon And Cornwall
Summary	269 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.

51 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
CHLOROPHYLL
COD as O2
Calcium - Ca
Chloride Ion
ColformsPre
Cond @ 20C
Cond @ 25C
Cu Filtered
Dry Matter %
E.coli C-MF
Endrin
F Coli Pre
HCH Alpha
HCH Beta
HCH Beta DWt
HCH Gamma
HCHAlpha DWt
HCHGamma DWt
HCHs ABGDE
Hardness
Hdnss Ca
Hdnss Mg
IE Pres
MST Filter
Magnesium-Mg
N Inorganic
N Oxidised
NATGRIDREF
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Phosphate
Potassium- K
SiO2 Rv
Sld NV@500C
Sld Sus@105C
StrepF PMF
Temp Water
TurbidityNTU
Type of Flow
WethPresPrec
WethPresTemp
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 269 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 2 Jan 2018 to 2 Jul 2019

Notation	Determinand	Units	2 Jan 2018 11:28	22 Mar 2018 11:30	3 May 2018 09:48	2 Jul 2018 10:24	13 Sep 2018 12:58	1 Nov 2018 11:41	9 Jan 2019 13:14	4 Mar 2019 12:44	14 May 2019 13:15	2 Jul 2019 09:48
0061	pH		7.52	7.58	7.51	7.25	7.78	7.47	7.52	7.36	7.74	7.22
0076	Temperature of Water	°C	9.9	8	10.7	17.7	13.4	9.8	9.4	9.6	12.9	14
0077	Conductivity at 25 C	μs/cm	266	254	250	375	397	353	246	241	297	354
0111	Ammoniacal Nitrogen as N	mg/l	0.359	< 0.03	< 0.03	0.082	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.048
0116	Nitrogen, Total Oxidised as N	mg/l	4.79	4.88	4.35	12.6	5.84	4.37	4.6	5.13	4.61	10
0117	Nitrate as N	mg/l	4.77	4.88	4.35	12.6	5.84	4.36	4.6	5.12	4.61	9.99
0118	Nitrite as N	mg/l	0.0207	< 0.004	< 0.004	0.015	0.0045	0.0055	0.0046	0.0056	0.0046	0.012
0119	Ammonia un-ionised as N	mg/l	0.00218	< 0.00018	< 0.00019	0.00048	< 0.00043	< 0.00016	< 0.00018	< 0.00012	< 0.00038	0.0002
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	47	44	46	37	77	65	40	36	62	37
0180	Orthophosphate, reactive as P	mg/l	0.2	0.172	0.5	2.22	2.89	2.18	0.271	0.437	1.48	2.1
9901	Oxygen, Dissolved, % Saturation	%	97	100.8	100	99	98	99.5	98.6	103.4	100	103.2
9924	Oxygen, Dissolved as O2	mg/l	11	11.9	11.1	9.41	10.2	11.3	11.3	11.8	10.5	10.6

Samples from 29 Sep 2016 to 1 Nov 2017

Notation	Determinand	Units	29 Sep 2016 10:10	26 Oct 2016 10:58	9 Nov 2016 15:54	1 Dec 2016 16:51	6 Jan 2017 10:21	7 Mar 2017 15:41	1 Jun 2017 13:56	7 Jul 2017 09:03	25 Sep 2017 14:16	1 Nov 2017 11:43
0061	pH		7.67		7.54		7.61	7.4	7.52	7.36	7.51	7.45
0076	Temperature of Water	°C	14.8	11.9	9.7	6.3	8.2	9	16.6	15.6	14.3	11.3
0077	Conductivity at 25 C	μs/cm	250	286	241	249	271	237	287	298	263	251
0085	BOD : 5 Day ATU	mg/l	2.46	3.23	1.88	1.46
0092	Chemical Oxygen Demand :- {COD}	mg/l	24	24	16	21
0111	Ammoniacal Nitrogen as N	mg/l	0.036	< 0.03	< 0.03	< 0.03	< 0.03	0.033	0.033	0.05	0.047	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	2.98	4.57	3.06	4.6	4.51	4.04	6.45	5.71	6.29	4.08
0117	Nitrate as N	mg/l	2.97	4.56	3.06	4.6	4.5	4.04	6.44	5.7	6.28	4.07
0118	Nitrite as N	mg/l	0.0089	0.0093	< 0.004	0.0043	0.0077	0.0048	0.0094	0.0108	0.0135	0.0087
0119	Ammonia un-ionised as N	mg/l	0.00044		< 0.00019		< 0.0002	0.00014	0.00033	0.00032	0.00039	< 0.00017
0135	Solids, Suspended at 105 C	mg/l	12.3	7.63	8.42	4.4
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	48		42		49	41	45	51	40	45
0172	Chloride	mg/l	30.4	33.9	31.6	29.7
0180	Orthophosphate, reactive as P	mg/l	0.394	1.06	0.249	0.182	0.576	0.259	0.928	1.28	0.483	0.295
0182	Silica, reactive as SiO2	mg/l	10.2	9.31	8.97	9.73
7887	Chlorophyll : Acetone Extract	μg/l	5.1	3.5	2.3	1.5
9901	Oxygen, Dissolved, % Saturation	%	93.3	96.6	94.3	95.1	98	98.5	97.6	92.5	98.5	100
9924	Oxygen, Dissolved as O2	mg/l	9.42	10.4	10.7	11.7	11.5	11.4	9.49	9.18	10.1	10.9

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sampling point River Menalhyl D/S St. Columb Stw

Determinands

Sampling results

Samples from 2 Jan 2018 to 2 Jul 2019

Samples from 29 Sep 2016 to 1 Nov 2017

sampling point
River Menalhyl D/S St. Columb Stw