sampling point
River Carey At Halwill Bridge Quoditch

Description	RIVER CAREY AT HALWILL BRIDGE - QUODITCH
Sampling point ID	SW-81281177
Type	Freshwater – Rivers
Status	open
Location	easting northing: 242031 98482 lat lon: 50.764364, -4.241326
Area	Devon And Cornwall
Sub-Area	Central Devon And Cornwall
Summary	17 samples taken between 2024 and 2020

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.

13 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
BOD ATU
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
pH

Samples from 5 May 2021 to 17 Jul 2024

Notation	Determinand	Units	5 May 2021 09:35	22 Jun 2021 13:24	13 Jul 2021 13:26	12 Aug 2021 11:01	1 Sep 2021 11:02	12 Oct 2021 08:44	2 Nov 2021 11:18	1 Dec 2021 10:30	20 Jun 2024 11:23	17 Jul 2024 13:40
0061	pH		7.6	7.84	7.75	7.3	7.3	7.12	7.8	7.25	7.63	7.31
0076	Temperature of Water	°C	7.6	13.2	16.1	13.9	12.5	8.5	9	8	13.7	14.1
0077	Conductivity at 25 C	μs/cm	227	214	146	179	225	183	132	168	196	140
0085	BOD : 5 Day ATU	mg/l									1.1	1.2
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.12	< 0.03	0.042	< 0.03	< 0.03	0.16	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.81	0.98	0.64	0.67	2.4	1.5	0.92	0.61	0.99	0.44
0117	Nitrate as N	mg/l	0.803	0.976	0.607	0.666	2.4	1.5	0.916	0.605	0.986	0.436
0118	Nitrite as N	mg/l	0.007	< 0.004	0.033	< 0.004	0.0047	< 0.004	< 0.004	0.0055	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00018	< 0.00048	0.00194	< 0.00015	0.00019	< 7.0e-05	< 0.00032	0.00045	< 0.00031	< 0.00015
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	49	59	31	46	52	39	23	31	52	28
0180	Orthophosphate, reactive as P	mg/l	0.033	0.025	0.043	0.035	0.42	0.017	0.021	0.046	0.014	0.021
9901	Oxygen, Dissolved, % Saturation	%	98.8	89	87.5	93	96	95	92	93.4	92.9	97.3
9924	Oxygen, Dissolved as O2	mg/l	11.8	9.31	8.6	9.58	10.2	11.1	10.6	11	9.61	9.98

Samples from 28 Oct 2020 to 12 Apr 2021

Notation	Determinand	Units	28 Oct 2020 13:27	11 Nov 2020 07:52	11 Dec 2020 11:03	13 Jan 2021 10:02	2 Feb 2021 08:29	5 Mar 2021 11:40	12 Apr 2021 12:32
0061	pH		7.3	7.16	7.24	7.89	7.13	7.55	7.59
0076	Temperature of Water	°C	9.6	10.7	8	7.6	8	5.7	7.2
0077	Conductivity at 25 C	μs/cm	151	164	152	132	116	164	187
0111	Ammoniacal Nitrogen as N	mg/l	0.073	0.03	0.068	0.089	0.086	0.042	0.031
0116	Nitrogen, Total Oxidised as N	mg/l	0.57	0.93	0.61	0.49	0.62	1.2	1.1
0117	Nitrate as N	mg/l	0.563	0.924	0.605	0.486	0.616	1.19	1.09
0118	Nitrite as N	mg/l	0.007	0.0065	0.0049	< 0.004	0.0041	0.0081	0.012
0119	Ammonia un-ionised as N	mg/l	0.00026	8.0e-05	0.00019	0.00106	0.00019	0.0002	0.00018
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	35	28	28	26	24	34	47
0180	Orthophosphate, reactive as P	mg/l	0.037	0.027	0.015	0.016	0.017	0.015	0.017
9901	Oxygen, Dissolved, % Saturation	%	98.8	94.5	95.4	97	95.6	99.2	103.2
9924	Oxygen, Dissolved as O2	mg/l	11.2	10.5	11.3	11.6	11.3	12.4	12.4