sampling point
Derril Water North Of Derril

Description	DERRIL WATER NORTH OF DERRIL
Sampling point ID	SW-91211370
Type	Freshwater – Rivers
Status	open
Location	easting northing: 230756 104072 lat lon: 50.811407, -4.403634
Area	Devon And Cornwall
Sub-Area	Central Devon And Cornwall
Summary	16 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 15 Apr 2021 to 30 Jul 2024

Notation	Determinand	Units	15 Apr 2021 13:20	13 May 2021 08:48	3 Jun 2021 11:47	1 Jul 2021 14:00	31 Aug 2021 09:27	6 Oct 2021 08:36	3 Nov 2021 10:55	1 Dec 2021 09:58	25 Jun 2024 12:07	30 Jul 2024 11:33
0061	pH		7.69	7	7.56	7.53	7.8	7.03	7.4	7.26	7.49	7.54
0076	Temperature of Water	°C	8.3	8.8	12.8	13.9	13.1	12.2	10.6	8.8	14.8	15
0077	Conductivity at 25 C	μs/cm	166	228	161	171	194	149	129	143	168	157
0085	BOD : 5 Day ATU	mg/l									< 1	< 3
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	1	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	< 0.2	5	0.35	0.29	0.23	0.6	0.35	0.62	0.29	0.26
0117	Nitrate as N	mg/l	< 0.196	4.92	0.346	0.286	0.226	0.596	0.346	0.616	0.286	0.256
0118	Nitrite as N	mg/l	< 0.004	0.079	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00024	0.0017	< 0.00025	< 0.00025	< 0.00044	< 7.0e-05	< 0.00015	< 9.0e-05	< 0.00024	< 0.00028
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	39	30	36	41	42	24	23	20	40	38
0180	Orthophosphate, reactive as P	mg/l	< 0.01	0.031	< 0.01	0.022	0.019	< 0.01	0.018	0.052	0.019	0.013
9901	Oxygen, Dissolved, % Saturation	%	101	91.4	98.6	93.4	95	95.6	83	92.9	96.4	98.5
9924	Oxygen, Dissolved as O2	mg/l	11.9	10.6	10.4	9.62	9.96	10.2	9.22	10.8	9.74	9.91

Samples from 28 Oct 2020 to 5 Mar 2021

Notation	Determinand	Units	28 Oct 2020 12:40	11 Nov 2020 08:24	15 Dec 2020 11:05	5 Jan 2021 11:15	3 Feb 2021 11:58	5 Mar 2021 12:43
0061	pH		7.14	7.33	7.38	7.62	7.63	7.66
0076	Temperature of Water	°C	10.9	11.4	7.9	5.2	8.4	6.4
0077	Conductivity at 25 C	μs/cm	131	147	141	149	125	147
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.35	0.4	0.56	0.45	0.4	0.33
0117	Nitrate as N	mg/l	0.346	0.396	0.556	0.446	0.396	0.326
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 8.0e-05	< 0.00013	< 0.00011	< 0.00016	< 0.00021	< 0.00019
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	28	31	29	30	28	30
0180	Orthophosphate, reactive as P	mg/l	0.017	0.012	< 0.01	< 0.01	0.012	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	94.6	93.5	96.7	97.2	98.1	97.5
9924	Oxygen, Dissolved as O2	mg/l	10.4	10.2	11.5	12.3	11.5	12