sampling point
Poltesco River At Trerise

Description	POLTESCO RIVER AT TRERISE
Sampling point ID	SW-81917255
Type	Freshwater – Rivers
Status	open
Location	easting northing: 171600 17100 lat lon: 50.010184, -5.189158
Area	Devon And Cornwall
Sub-Area	West Devon And Cornwall
Summary	48 samples taken between 2024 and 2019

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.

12 determinands have been measured at this site

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

Displaying the twenty most recent samples. You can see all 48 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 13 Jul 2023 to 7 Mar 2024

Notation	Determinand	Units	13 Jul 2023 09:34	21 Aug 2023 14:04	19 Sep 2023 11:04	16 Oct 2023 10:38	9 Nov 2023 14:26	6 Dec 2023 09:56	19 Dec 2023 12:19	16 Jan 2024 12:16	13 Feb 2024 09:06	7 Mar 2024 09:05
0061	pH		7.75	7.47	8.01	7.63	7.62	7.51	7.89	7.71	7.77	7.66
0076	Temperature of Water	°C	15.1	17	15	11.1	10.1	6.4	11.3	4.4	8.7	8.6
0077	Conductivity at 25 C	μs/cm	641	522	557	430	318	342	277	478	397	351
0111	Ammoniacal Nitrogen as N	mg/l	0.041	1.6	< 0.03	< 0.03	< 0.03	< 0.03	0.051	< 0.03	0.059	0.051
0116	Nitrogen, Total Oxidised as N	mg/l	7.6	3.8	7	1.9	1.1	1.8	0.64	6.9	1.8	1.6
0117	Nitrate as N	mg/l	7.58	3.62	6.99	1.9	1.1	1.8	0.634	6.89	1.8	1.59
0118	Nitrite as N	mg/l	0.024	0.18	0.011	< 0.004	< 0.004	< 0.004	0.0065	0.011	< 0.004	0.0053
0119	Ammonia un-ionised as N	mg/l	0.00062	0.0147	< 0.00079	< 0.00026	< 0.00023	< 0.00014	0.0008	< 0.00019	0.00058	0.00039
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	190	160	150	120	74	95	78	230	130	110
0180	Orthophosphate, reactive as P	mg/l	1.5	1.3	1.4	0.21	0.049	0.065	0.12	0.061	0.084	0.088
9901	Oxygen, Dissolved, % Saturation	%	80.5	73.4	80.9	91.4	98	97.4	96.2	98.6	94.8	95.7
9924	Oxygen, Dissolved as O2	mg/l	8.08	7.08	8.14	10	11	12	10.5	12.8	11	11.2

Samples from 30 Aug 2022 to 5 Jun 2023

Notation	Determinand	Units	30 Aug 2022 12:58	28 Sep 2022 11:54	5 Oct 2022 12:17	9 Nov 2022 12:14	13 Dec 2022 13:54	27 Jan 2023 13:20	13 Feb 2023 14:13	10 Mar 2023 09:04	10 May 2023 11:08	5 Jun 2023 09:33
0061	pH		8.13	7.7	7.79	7.25	7.71	7.76	7.88	7.68	7.44	8.15
0076	Temperature of Water	°C	17.1	13	14.8	11.4	6	6.4	9	7.2	12.3	12.8
0077	Conductivity at 25 C	μs/cm	751	622	555	313	461	436	516	270	223	1466
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.86	4.2	2.2	0.53	1.8	2.7	2.8	0.37	0.44	5.7
0117	Nitrate as N	mg/l	0.856	4.2	2.2	0.526	1.8	2.7	2.8	0.366	0.436	5.69
0118	Nitrite as N	mg/l	0.0045	0.0047	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	0.014
0119	Ammonia un-ionised as N	mg/l	< 0.00092	< 0.00035	< 0.00048	< 0.00011	< 0.00021	< 0.00024	< 0.00039	< 0.00021	< 0.00018	< 0.00067
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	260	150	93	52	110	120	160	60	67	190
0180	Orthophosphate, reactive as P	mg/l	0.24	0.94	0.47	0.043	0.044	0.068	0.069	0.026	0.06	1.2
9901	Oxygen, Dissolved, % Saturation	%	82.5	87.6	86.2	99	96.3	97.2	99.7	92.4	94.2	88
9924	Oxygen, Dissolved as O2	mg/l	7.94	9.21	8.71	10.8	12	12	11.5	11.1	10.1	9.29

Tell us whether you accept cookies

sampling point Poltesco River At Trerise

Determinands

Sampling results

Samples from 13 Jul 2023 to 7 Mar 2024

Samples from 30 Aug 2022 to 5 Jun 2023

sampling point
Poltesco River At Trerise