sampling point
Gweek River At Gweek Bridge

Description	GWEEK BRIDGE GWEEK RIVER (HELFORD RIVER)
Sampling point ID	SW-81916017
Type	Freshwater – Rivers
Status	open
Location	easting northing: 170636 26747 lat lon: 50.09644, -5.208368
Area	Devon And Cornwall
Sub-Area	West Devon And Cornwall
Summary	139 samples taken between 2017 and 2006

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.

36 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
B. globigii
BOD ATU
CHLOROPHYLL
COD as O2
Chloride Ion
ColfmF Conf
ColformsPre
Cond @ 25C
E.coli C-MF
E.coli Pres
F Coli Pre
IE Conf
IE Pres
N Inorganic
N Oxidised
NATGRIDREF
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Oil & Grs Vs
Orthophospht
Oxygen Diss
Phosphorus-P
Salinity
SerratiaPhge
SiO2 Rv
Site Number
Sld Sus@105C
StrepF PMF
Temp Water
Time
Type of Flow
pH

Displaying the twenty most recent samples. You can see all 139 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 1 Sep 2016 to 4 Apr 2017

Notation	Determinand	Units	1 Sep 2016 13:14	27 Oct 2016 12:05	4 Nov 2016 11:58	18 Nov 2016 13:43	21 Nov 2016 14:25	7 Dec 2016 11:21	11 Jan 2017 10:31	25 Jan 2017 12:21	9 Mar 2017 12:27	4 Apr 2017 14:26
0061	pH		7.41	7.13	7	7.17	7.15	7.1	7.21	7.1	6.91	6.95
0076	Temperature of Water	°C	13.7	11.9	11.4	9.7	9.7	11.5	10	8.3	11.4	11.6
0077	Conductivity at 25 C	μs/cm	234	215	204	228	148	201	203	206	204	191
0085	BOD : 5 Day ATU	mg/l	1.17	< 1	1.03	< 1	5.43	< 1
0092	Chemical Oxygen Demand :- {COD}	mg/l	< 10	< 10	12	13	130	< 10
0111	Ammoniacal Nitrogen as N	mg/l	0.06	< 0.03	< 0.03	< 0.03	0.114	< 0.03	< 0.03	0.03	0.034	0.032
0116	Nitrogen, Total Oxidised as N	mg/l	4.24	4.29	4.43	4.25	2.61	4.65	4.5	4.7	4.62	4.36
0117	Nitrate as N	mg/l	4.24	4.29	4.43	4.25	2.6	4.65	4.5	4.7	4.62	4.36
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	0.0056	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	0.00038	< 9.0e-05	< 6.0e-05	< 8.0e-05	0.00029	< 8.0e-05	< 9.0e-05	6.0e-05	6.0e-05	6.0e-05
0135	Solids, Suspended at 105 C	mg/l	< 3	15.8	8.9	11.2	331	5.4
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	15	17	17	16	20	13	14	14	17	14
0172	Chloride	mg/l	36.1	36	29.7	31.1	23.7	28.5
0180	Orthophosphate, reactive as P	mg/l	0.027	0.013	0.012	0.011	0.049	< 0.01	0.011	< 0.01	0.013	0.011
0182	Silica, reactive as SiO2	mg/l	8.06	7.49	7.51	7.41	4.68	6.87
0348	Phosphorus, Total as P	mg/l	0.049	0.038	0.0298	0.0273	0.716	0.0216
3683	Nitrogen, Total Inorganic : (Calculated)	mg/l	4.3	4.32	4.46	4.28	2.72	4.68
7887	Chlorophyll : Acetone Extract	μg/l	1.3	1.4	1.1	1.4	25.2	0.51
9901	Oxygen, Dissolved, % Saturation	%	96.5	94.8	95.3	97.8	98.5	99.5	100	100	95.7	96.9
9924	Oxygen, Dissolved as O2	mg/l	9.98	10.2	10.4	11.1	11.2	10.8	11.3	11.7	10.4	10.5

Samples from 30 Sep 2015 to 22 Jul 2016

Notation	Determinand	Units	30 Sep 2015 09:46	27 Oct 2015 11:52	12 Nov 2015 11:54	26 Nov 2015 12:55	14 Jan 2016 12:46	11 Feb 2016 11:32	26 Feb 2016 11:46	19 Apr 2016 13:23	9 May 2016 12:27	22 Jul 2016 13:18
0061	pH		7.31	7.89	7.32	6.95	6.8	7	7.37	7.31	7.29	7.08
0076	Temperature of Water	°C	12	12.2	12.2	11.6	9	8.5	8.8	10.6	12.5	15.7
0077	Conductivity at 25 C	μs/cm	349	289	202	205	227	276	208	201	346	230
0085	BOD : 5 Day ATU	mg/l	< 1	< 1	1.07	< 1	< 1	< 1	1.64	2.12	< 1	1.19
0092	Chemical Oxygen Demand :- {COD}	mg/l	< 10	35	< 10	< 10	12	< 10	36	< 10	< 10	13
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.192	0.051	0.04	0.06	0.039	0.036	< 0.03	< 0.03	0.051
0116	Nitrogen, Total Oxidised as N	mg/l	4.2	2.92	4.25	4.18	4.93	4.82	4.7	4.71	4.47	4.4
0117	Nitrate as N	mg/l	4.2	2.91	4.25	4.18	4.92	4.82	4.7	4.71	4.47	4.4
0118	Nitrite as N	mg/l	< 0.004	0.0061	< 0.004	< 0.004	0.0055	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00013	0.00321	0.00023	7.0e-05	7.0e-05	6.0e-05	0.00014	< 0.00012	< 0.00013	0.00017
0135	Solids, Suspended at 105 C	mg/l	4.9	24	4.6	3.9	9.7	9.4	73.2	3.8	< 3	< 3
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	16	22	20	15	15	14	14	14	14	16
0172	Chloride	mg/l	68.9	53	28.8	30.3	35.3	48.3	28.6	30.1	60.3	34.3
0180	Orthophosphate, reactive as P	mg/l	0.01	0.077	0.019	0.015	0.017	0.012	< 0.01	< 0.01	< 0.01	0.021
0182	Silica, reactive as SiO2	mg/l	7.52	7.44	7.33	7.18	6.3	6	5.87	6.09	5.89	7.87
0348	Phosphorus, Total as P	mg/l	0.0214	0.164	0.0233	0.0285	0.0494	0.0352	0.132	0.0154	0.0165	0.0342
3683	Nitrogen, Total Inorganic : (Calculated)	mg/l	4.23	3.11	4.3	4.22	4.99	4.86	4.74	4.74	4.5	4.45
7887	Chlorophyll : Acetone Extract	μg/l	1	22.1	1.6	1.5	3.6	1.4	6.6	1.2	3.9	1.2
9901	Oxygen, Dissolved, % Saturation	%	95.5	94.9	95.8	95.6	96.6	96.3	97.4	100	99.4	98.5
9924	Oxygen, Dissolved as O2	mg/l	10.3	10.2	10.3	10.4	11.1	11.2	11.3	11.1	10.6	9.76

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sampling point Gweek River At Gweek Bridge

Determinands

Sampling results

Samples from 1 Sep 2016 to 4 Apr 2017

Samples from 30 Sep 2015 to 22 Jul 2016

sampling point
Gweek River At Gweek Bridge