sampling point
Aire At Malham Tarn

Description	AIRE AT MALHAM TARN (AKA MALHAM WATER @ TARN FOOT)
Sampling point ID	NE-49400744
Type	Freshwater – Rivers
Status	open
Location	easting northing: 389423 466183 lat lon: 54.091427, -2.163195
Area	Yorkshire
Sub-Area	Aire, Calder, Wharfe
Summary	130 samples taken between 2021 and 2000

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.

56 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
C - Org Filt
C - Organic
CHLOR A
CHLOROPHYLL
Calcium - Ca
Chloride Ion
Chlorophyl-A
Colour Filt
Cond @ 20C
Cond @ 25C
Cu Filtered
DtrgtAncSyn
Foam Visible
Hardness
Liqcolour-mn
Liqcolour-se
Liqcolour-st
Magnesium-Mg
N Digested
N Oxid Filt
N Oxidised
N-Kjeldahl
NH3 filt N
NH3 un-ion
Nitrate-N
Nitrite-N
Nitrogen - N
O Diss %sat
Obs Flow ROC
Oil & Grs Vs
Orthophospht
OrthophsFilt
Oxygen Diss
P Digested
Phenol Odour
Phosphorus-P
Potassium- K
Sample Depth
SiO2 Rv
Sld Sus@105C
Sodium - Na
Solid quanty
Sulphate SO4
Temp Water
TurbidityNTU
Type of Flow
Weth7Dy-Prec
Weth7Dy-Temp
WethPresPrec
WethPresTemp
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 130 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 12 Nov 2020 to 26 Aug 2021

Notation	Determinand	Units	12 Nov 2020 11:06	4 Dec 2020 12:48	27 Jan 2021 11:25	11 Feb 2021 10:19	5 Mar 2021 12:17	21 Apr 2021 09:46	13 May 2021 12:18	14 Jun 2021 15:11	22 Jul 2021 13:24	26 Aug 2021 13:24
0061	pH		8.38	8.43	8.32	8.53	8.55	8.72	8.48	8.29	8.61	8.59
0076	Temperature of Water	°C	7.5	2.3	2.7	0.1	4.5	7.3	11.3	16.7	25.2	18.7
0077	Conductivity at 25 C	μs/cm	282	292	267	272	261	250	230	233	203	193
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	< 0.2	0.25	0.41	0.41	0.37	< 0.2	< 0.2	< 0.2	< 0.2	< 0.2
0117	Nitrate as N	mg/l	< 0.196	0.246	0.406	0.406	0.366	< 0.196	< 0.196	< 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	< 0.00046	< 0.00031	< 0.00032	< 0.00026	< 0.00037	< 0.00045	< 0.0006	< 0.00089	< 0.00164	< 0.00103
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	140	150	130	140	130	110	110	110	92	96
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	%	102.3	101.1	102.6	107.6	98.3	106.1	115.6	79.7	158.2	106.1
9924	Oxygen, Dissolved as O2	mg/l	12.2	13.8	13.9	15.6	12.7	12.8	12.6	7.73	13	9.88

Samples from 10 Apr 2017 to 21 Oct 2020

Notation	Determinand	Units	10 Apr 2017 11:02	10 Jul 2019 11:12	3 Sep 2019 11:35	8 Oct 2019 12:29	14 Nov 2019 11:05	16 Dec 2019 11:23	21 Jan 2020 09:51	27 Feb 2020 11:01	20 Mar 2020 14:29	21 Oct 2020 13:52
0061	pH		8.47	8.52	8.37	8.34	8.4	8.37	8.3	8.36	8.5	8.47
0076	Temperature of Water	°C	8.8	16.2	13.4	10.1	3.1	2.2	3.4	2.8	7.3	9.9
0077	Conductivity at 25 C	μs/cm	278	232	257	277	290	282	286	245	246	269
0111	Ammoniacal Nitrogen as N	mg/l	0.0084	0.031	0.032	0.042	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.277	< 0.2	< 0.2	< 0.2	0.28	0.36	0.47	0.43	0.34	< 0.2
0117	Nitrate as N	mg/l	0.274	< 0.196	< 0.196	< 0.196	0.276	0.356	0.466	0.426	0.336	< 0.196
0118	Nitrite as N	mg/l	0.00306	< 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	0.00014	0.00089	0.00075	0.00077	< 0.00033	< 0.00031	< 0.00034	< 0.00032	< 0.00045	< 0.00054
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	133	110	120	140	151	140	140	120	120	140
0180	Orthophosphate, reactive as P	mg/l	0.001	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	95.5	94.8	96.1	105.2	99.8	101	104.1	107.1	107.9	103.8
9924	Oxygen, Dissolved as O2	mg/l	11.1	9.29	10	11.8	13.4	13.9	13.8	14.5	13	11.7

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sampling point Aire At Malham Tarn

Determinands

Sampling results

Samples from 12 Nov 2020 to 26 Aug 2021

Samples from 10 Apr 2017 to 21 Oct 2020

sampling point
Aire At Malham Tarn