sampling point
Poltesco River At Erisey

Description	RSN1723 ERISEY
Sampling point ID	SW-RSN1723
Type	Freshwater – Rivers
Status	open
Location	easting northing: 171274 18226 lat lon: 50.02017, -5.194372
Area	Devon And Cornwall
Sub-Area	West Devon And Cornwall
Summary	33 samples taken between 2024 and 2021

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.

17 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
C - Org Filt
Chloride Ion
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
Nitrogen - N
O Diss %sat
Orthophospht
Oxygen Diss
Phosphorus-P
SiO2 Rv
Temp Water
pH

Displaying the twenty most recent samples. You can see all 33 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 10 May 2023 to 7 Mar 2024

Notation	Determinand	Units	10 May 2023 11:54	5 Jun 2023 11:17	21 Aug 2023 14:47	25 Sep 2023 09:10	16 Oct 2023 10:59	9 Nov 2023 15:13	6 Dec 2023 10:20	16 Jan 2024 11:47	13 Feb 2024 09:52	7 Mar 2024 09:37
0061	pH		7.58	8.18	7.81	7.74	7.77	7.84	7.6	7.85	7.79	7.87
0076	Temperature of Water	°C	13.2	13.7	17.6	14.7	10.7	10.4	5.5	3.3	8.6	8.7
0077	Conductivity at 25 C	μs/cm	154	520	345	323	291	174	201	340	262	214
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	0.098	0.05	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	< 0.2	0.74	< 0.2	< 0.2	< 0.2	< 0.2	< 0.2	0.39	< 0.2	< 0.2
0117	Nitrate as N	mg/l	< 0.196	0.733	< 0.196	< 0.196	< 0.196	< 0.196	< 0.196	0.386	< 0.196	< 0.196
0118	Nitrite as N	mg/l	< 0.004	0.0071	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00027	< 0.00072	< 0.00062	< 0.00043	< 0.00034	< 0.00039	< 0.00016	0.00078	0.00051	< 0.00037
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	43	190	110	81	77	46	55	98	72	62
0180	Orthophosphate, reactive as P	mg/l	0.018	0.11	0.073	0.033	0.029	0.022	0.034	0.068	0.072	0.046
9901	Oxygen, Dissolved, % Saturation	%	98.1	89.3	92.6	94.5	98.1	96	97.7	99.1	97.4	100.6
9924	Oxygen, Dissolved as O2	mg/l	10.3	9.24	8.82	9.57	10.9	10.7	12.3	13.2	11.3	11.7

Samples from 27 Jun 2022 to 10 Mar 2023

Notation	Determinand	Units	27 Jun 2022 12:37	28 Jul 2022 12:14	15 Aug 2022 12:20	28 Sep 2022 11:30	18 Oct 2022 12:49	9 Nov 2022 11:48	13 Dec 2022 14:23	17 Jan 2023 11:57	13 Feb 2023 13:56	10 Mar 2023 09:33
0061	pH		7.94	7.78	7.74	7.83	7.81	7.32	7.86	7.42	8.15	7.67
0076	Temperature of Water	°C	14.4	15.9	19.4	13.1	14.1	10.8	4.8	3.9	9.2	6.8
0077	Conductivity at 25 C	μs/cm	558	618	624	545	407	232	298	154	385	213
0111	Ammoniacal Nitrogen as N	mg/l	0.052	0.74	0.12	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	1.4	1.1	0.48	< 0.2	< 0.2	< 0.2	0.22	< 0.2	0.29	< 0.2
0117	Nitrate as N	mg/l	1.38	0.98	0.47	< 0.196	< 0.196	< 0.196	0.216	< 0.196	0.286	< 0.196
0118	Nitrite as N	mg/l	0.024	0.12	0.01	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	0.00114	0.0126	0.00242	< 0.00047	< 0.00048	< 0.00012	< 0.00027	< 9.0e-05	< 0.00052	< 0.0002
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	200	240	240	98	87	37	65	24	120	42
0180	Orthophosphate, reactive as P	mg/l	0.19	0.39	0.14	0.026	0.022	0.013	0.025	0.025	0.031	0.014
9901	Oxygen, Dissolved, % Saturation	%	80	67.2	58	92.8	96.6	98	98.8	99.2	106.5	94.5
9924	Oxygen, Dissolved as O2	mg/l	8.15	6.63	5.32	9.73	9.91	10.8	12.7	13	12.2	11.5

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sampling point Poltesco River At Erisey

Determinands

Sampling results

Samples from 10 May 2023 to 7 Mar 2024

Samples from 27 Jun 2022 to 10 Mar 2023

sampling point
Poltesco River At Erisey