sampling point
River Greta At East Mellwaters

Description	RIVER GRETA AT EAST MELLWATERS
Sampling point ID	NE-45200227
Type	Freshwater – Rivers
Status	open
Location	easting northing: 396770 512858 lat lon: 54.511003, -2.051391
Area	Northumberland Durham And Tees
Sub-Area	Wear & Tees
Summary	82 samples taken between 2021 and 2010

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 82 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 10 Nov 2020 to 17 Aug 2021

Notation	Determinand	Units	10 Nov 2020 13:11	8 Dec 2020 10:56	13 Jan 2021 12:07	15 Feb 2021 10:11	9 Mar 2021 11:41	21 Apr 2021 13:27	14 May 2021 12:29	23 Jun 2021 10:25	26 Jul 2021 09:41	17 Aug 2021 13:50
0061	pH		7.93	8.1	7.81	7.81	8.15	8.22	7.83	8.12	8.44	8.1
0076	Temperature of Water	°C	9	3.7	1.9	0.7	6.2	9.5	9.3	12.7	14.9	16.4
0077	Conductivity at 25 C	μs/cm	191	145	151	190	194	379	171	354	382	307
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	0.038	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.46	0.4	0.5	0.31	0.3	0.43	< 0.2	0.44	0.35	0.21
0117	Nitrate as N	mg/l	0.456	0.396	0.496	0.306	0.296	0.426	< 0.196	0.436	0.346	0.206
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00043	< 0.00034	< 0.0002	0.00023	< 0.00041	< 0.00053	< 0.00035	< 0.00067	< 0.00078	< 0.00087
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	70	46	38	12	73	110	49	140	150	110
0180	Orthophosphate, reactive as P	mg/l	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	101.9	100.8	104.1	103.3	111	110.4	102.4	109.1	103.7	110.1
9924	Oxygen, Dissolved as O2	mg/l	11.8	13.3	14.4	14.8	13.7	12.6	11.7	11.5	10.5	10.7

Samples from 9 Jul 2015 to 15 Oct 2020

Notation	Determinand	Units	9 Jul 2015 10:32	25 Sep 2015 09:28	12 Sep 2019 11:25	26 Nov 2019 08:36	12 Dec 2019 11:46	15 Jan 2020 08:17	5 Feb 2020 10:04	20 Feb 2020 11:17	18 Mar 2020 10:48	15 Oct 2020 12:49
0061	pH		8.43	8.12	7.9	7.47	7.65	8.29	7.69	7.22	7.22	7.56
0076	Temperature of Water	°C	12.3	11.1	12.8	6.6	3.3	3.2	3.4	4.7	6	8.2
0077	Conductivity at 25 C	μs/cm	120	290	222	86	120	74	128	78	81	87
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.051	< 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	< 0.2	< 0.2	0.22	0.49	0.26	0.33	< 0.2	< 0.2	< 0.2
0117	Nitrate as N	mg/l	< 0.196	< 0.196	< 0.196	0.216	0.486	0.256	0.326	< 0.196	< 0.196	< 0.196
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00065	0.00101	< 0.00054	< 0.00013	< 0.00015	< 0.00033	< 0.00017	< 6.0e-05	< 7.0e-05	< 0.00018
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	39	105	83	30	37	19	30	13	19	34
0180	Orthophosphate, reactive as P	mg/l	0.0024	0.0074	< 0.01	0.011	< 0.01	< 0.01	< 0.01	0.01	< 0.01	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	74.1	71.4	100.5	99.5	102	98.3	103.7	106.2	105.2	98
9924	Oxygen, Dissolved as O2	mg/l	7.91	7.84	10.6	12.2	13.6	13.1	13.8	13.7	13.1	11.5

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sampling point River Greta At East Mellwaters

Determinands

Sampling results

Samples from 10 Nov 2020 to 17 Aug 2021

Samples from 9 Jul 2015 to 15 Oct 2020

sampling point
River Greta At East Mellwaters