sampling point
Helford River U/S Gweek Mill

Description	HELFORD RIVER UPSTREAM OF GWEEK MILL
Sampling point ID	SW-81913777
Type	Freshwater – Rivers
Status	open
Location	easting northing: 170330 26480 lat lon: 50.093924, -5.212479
Area	Devon And Cornwall
Sub-Area	West Devon And Cornwall
Summary	145 samples taken between 2017 and 2004

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.

37 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
B-[a]-pyrene
B-[b]-fluora
B-[ghi]-pery
B-[k]-fluora
BOD ATU
CHLOROPHYLL
COD as O2
Chloride Ion
ColfmF Conf
ColformsPre
Cond @ 25C
E.coli C-MF
E.coli Pres
F Coli Pre
Fluoranthene
Ind123pyrene
N Inorganic
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Phosphorus-P
Salinity
SiO2 Rv
Site Number
Sld Sus@105C
StrepF PMF
Temp Water
Time
Type of Flow
WethPresPrec
pH

Displaying the twenty most recent samples. You can see all 145 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 11 Jan 2017 to 12 Sep 2017

Notation	Determinand	Units	11 Jan 2017 10:14	17 Feb 2017 13:07	28 Mar 2017 16:02	29 Mar 2017 15:03	8 Jun 2017 15:39	26 Jun 2017 14:11	17 Jul 2017 13:35	23 Aug 2017 11:33	31 Aug 2017 08:38	12 Sep 2017 15:10
0061	pH		7.45	7.3	7.22		7.05	7.26	7.45
0076	Temperature of Water	°C	10.1	10.1	12.9		15.4	16.8	17
0077	Conductivity at 25 C	μs/cm	282	280	313		424	296	289
0111	Ammoniacal Nitrogen as N	mg/l	0.031	< 0.03	< 0.03			0.036	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	6.8	6.94	6.8			6.23	5.63	5.64
0117	Nitrate as N	mg/l	6.79	6.94	6.79			6.2	5.6	5.62
0118	Nitrite as N	mg/l	0.0095	< 0.004	0.0052			0.0275	0.0263	0.0178
0119	Ammonia un-ionised as N	mg/l	0.00016	< 0.00011	< 0.00011			0.0002	< 0.00026
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	29	28	29			29	33	31
0180	Orthophosphate, reactive as P	mg/l	0.011	< 0.01	< 0.01			0.024	0.025	0.019
0714	Benzo(g,h,i)Perylene	μg/l	0.00068	0.0007	0.00063			0.00045	0.00074		0.00089	0.00044
0731	Benzo(b)Fluoranthene	μg/l	0.00053	0.00057	0.00053			0.00034	0.00049		0.00059	0.00035
0733	Benzo(k)Fluoranthene	μg/l	0.00026	0.00029	0.00024			0.00015	0.00023		0.00025	0.00015
0736	Fluoranthene	μg/l	0.00183	0.00172	0.00189			0.00144	0.00141		0.0016	0.00123
0746	Indeno(1,2,3-cd)pyrene	μg/l	0.00069	0.00076	0.00067			0.00048	0.00081		0.00084	0.00045
6399	Benzo(a)Pyrene	μg/l	0.00057	0.00061	0.00053	0.00082	0.0006	0.00033	0.00053		0.00053	0.00027
9901	Oxygen, Dissolved, % Saturation	%	98.5	100	100.3		99.8	94.5	102.1
9924	Oxygen, Dissolved as O2	mg/l	11.1	11.2	10.6		9.95	9.15	9.84

Samples from 14 Apr 2016 to 7 Dec 2016

Notation	Determinand	Units	14 Apr 2016 12:02	15 Jun 2016 13:56	30 Jun 2016 10:43	22 Jul 2016 13:27	11 Aug 2016 12:58	16 Sep 2016 13:23	16 Sep 2016 13:24	27 Oct 2016 12:25	18 Nov 2016 14:14	7 Dec 2016 11:13
0061	pH		6.93		7.47	7.02	7.78			6.96	7.04	6.99
0076	Temperature of Water	°C	11.3	14.1	14.9	16.6	15.5	15.3		12	9.7	11.4
0077	Conductivity at 25 C	μs/cm	277	287	281	290	290	280		295	688	282
0085	BOD : 5 Day ATU	mg/l	1.19	1.24	1.15	1.13	< 1	< 1		< 1	1.09	< 1
0092	Chemical Oxygen Demand :- {COD}	mg/l	< 10	< 10	< 10	< 10	< 10	11		11	17	< 10
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.03	< 0.03	< 0.03	< 0.03	0.037		< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	6.33	6.41	5.8	6.08	5.7	5.22		5.86	6.11	6.76
0117	Nitrate as N	mg/l	6.32	6.39	5.78	6.06	5.68	5.21		5.85	6.1	6.75
0118	Nitrite as N	mg/l	0.0051	0.0218	0.0158	0.0249	0.0192	0.0091		0.0054	0.0053	0.0062
0119	Ammonia un-ionised as N	mg/l	< 5.0e-05		< 0.00024	< 0.0001	< 0.0005			< 6.0e-05	< 6.0e-05	< 6.0e-05
0135	Solids, Suspended at 105 C	mg/l	4.7	3.35	< 3	3.25	3.22	13		7.22	20.5	4.4
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	28		32	30	33			32	30	27
0172	Chloride	mg/l	38.4	36.7	35.6	37.9	36.4	36		37.3	38.4	35.3
0180	Orthophosphate, reactive as P	mg/l	< 0.01	0.018	0.02	0.02	0.023	0.033		0.017	0.018	< 0.01
0182	Silica, reactive as SiO2	mg/l	5.9	6.25	6.64	6.65	6.39	6.81		6.47	6.67	6.45
0714	Benzo(g,h,i)Perylene	μg/l	0.0008	0.00029	0.00049		0.00058	0.00063			0.00129	0.00017
0731	Benzo(b)Fluoranthene	μg/l	0.00065	0.00024	0.00039		0.0004	0.00041			0.00083	0.00016
0733	Benzo(k)Fluoranthene	μg/l	0.00029	0.00011	0.00018		0.00019	0.00018			0.0004	7.0e-05
0736	Fluoranthene	μg/l	0.00233	0.0012	0.00164		0.00149	0.00115			0.00152	0.00079
0746	Indeno(1,2,3-cd)pyrene	μg/l	0.00077	0.0003	0.00053		0.00065	0.00074			0.00148	0.00018
6399	Benzo(a)Pyrene	μg/l	0.00058	0.00021	0.00039		0.0004	0.00042	0.00053		0.00093	0.00014
7887	Chlorophyll : Acetone Extract	μg/l	1.6	2.1	1.9	1.8	2.6	0.81		1.1	17.5	< 0.5
9901	Oxygen, Dissolved, % Saturation	%	100	98.5	101.1	94.5	101.3	95.5		93.1	96.1	97.5
9924	Oxygen, Dissolved as O2	mg/l	10.9	10.1	10.2	9.18	10.1	9.54		10	10.9	10.6

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sampling point Helford River U/S Gweek Mill

Determinands

Sampling results

Samples from 11 Jan 2017 to 12 Sep 2017

Samples from 14 Apr 2016 to 7 Dec 2016

sampling point
Helford River U/S Gweek Mill