We would welcome your feedback to help us make future improvements.

sampling point
River Tamar At Greystone Bridge

Description RIVER TAMAR AT GREYSTONE BRIDGE
Sampling point ID SW-81250277
Type Freshwater – Rivers
Status open
Location easting northing: 236838 80363
lat lon: 50.60012, -4.306898
Area Devon And Cornwall
Sub-Area Central Devon And Cornwall
Summary 164 samples taken between 2024 and 2000

Determinands

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.

68 determinands have been measured at this site
  • Action taken
  • Al- Filtered
  • Alky pH 4.5
  • Aluminium-Al
  • Ammonia(N)
  • Arsenic - As
  • As-Filtered
  • B - Filtered
  • BOD ATU
  • Ba- Filtered
  • Barium - Ba
  • Boron - as B
  • C - Org Filt
  • Ca Filtered
  • Cadmium - Cd
  • Calcium - Ca
  • Cd Filtered
  • Chloride Ion
  • Chromium -Cr
  • Cond @ 20C
  • Cond @ 25C
  • Copper - Cu
  • Cr- Filtered
  • Cu Filtered
  • Fe- Filt
  • Hardness
  • Hdnss Ca
  • Hdnss Mg
  • IonicBalance
  • Iron - as Fe
  • K- Filtered
  • Lead - as Pb
  • Lithium - Li
  • Lithium Filt
  • Magnesium-Mg
  • Manganse-Mn
  • Mg Filtered
  • Mn- Filtered
  • N Inorganic
  • N Oxidised
  • NATGRIDREF
  • NH3 un-ion
  • Na- Filtered
  • Ni- Filtered
  • Nickel - Ni
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Orthophospht
  • OrthophsFilt
  • Oxygen Diss
  • Pb Filtered
  • Phosphorus-P
  • Potassium- K
  • SO4dis
  • SiO2 Rv
  • Sld Sus@105C
  • Sodium - Na
  • Strontium-Sr
  • StrontumFilt
  • Sulphate SO4
  • Temp Water
  • Type of Flow
  • WethPresPrec
  • Zinc - as Zn
  • Zn- Filtered
  • pH
  • pH in-situ

Sampling results

Displaying the twenty most recent samples. You can see all 164 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 11 Jul 2023 to 21 Mar 2024

NotationDeterminandUnits11 Jul
2023
13:24
17 Aug
2023
12:10
20 Sep
2023
09:50
10 Oct
2023
13:50
16 Nov
2023
09:53
7 Dec
2023
14:02
4 Jan
2024
13:29
31 Jan
2024
14:26
1 Feb
2024
11:36
21 Mar
2024
13:24
0061pH7.747.627.587.436.947.117.267.447.337.45
0076Temperature of Water°C17.316.115.814.69.89.68.87.58.111.5
0077Conductivity at 25 Cμs/cm205189196196154141168195195170
0111Ammoniacal Nitrogen as Nmg/l0.057< 0.03< 0.03< 0.030.080.0870.045< 0.03< 0.03< 0.03
0116Nitrogen, Total Oxidised as Nmg/l1.11.51.61.71.61.42.22.22.21.9
0117Nitrate as Nmg/l1.091.51.61.71.591.392.192.192.191.89
0118Nitrite as Nmg/l0.011< 0.0040.005< 0.0040.00760.00780.010.00950.0110.0099
0119Ammonia un-ionised as Nmg/l0.00099< 0.00036< 0.00032< 0.000210.000130.00020.00014< 0.00013< 0.0001< 0.00017
0162Alkalinity to pH 4.5 as CaCO3mg/l45414344353031373737
0180Orthophosphate, reactive as Pmg/l0.0320.0320.060.0260.0350.0360.0330.0260.0250.024
9901Oxygen, Dissolved, % Saturation%95.396.193.3101.495.596.996.698.896.995.7
9924Oxygen, Dissolved as O2mg/l9.139.449.2210.310.81111.211.811.410.4

Samples from 5 Aug 2022 to 8 Jun 2023

NotationDeterminandUnits 5 Aug
2022
09:45
22 Sep
2022
12:03
19 Oct
2022
10:50
9 Nov
2022
12:22
6 Dec
2022
08:58
18 Jan
2023
12:16
3 Feb
2023
13:46
1 Mar
2023
14:53
10 May
2023
16:33
8 Jun
2023
11:45
0061pH7.477.927.537.47.657.247.418.17.358.04
0076Temperature of Water°C16.213.513.511.87.26.18.86.11317
0077Conductivity at 25 Cμs/cm177188225199193195204204143224
0111Ammoniacal Nitrogen as Nmg/l0.034< 0.03< 0.03< 0.03< 0.030.032< 0.03< 0.030.06< 0.03
0116Nitrogen, Total Oxidised as Nmg/l0.980.760.872.72.732.21.91.41.4
0117Nitrate as Nmg/l0.9750.7560.8662.692.692.992.191.91.391.39
0118Nitrite as Nmg/l0.0047< 0.004< 0.0040.00680.00520.00670.0110.00410.0120.01
0119Ammonia un-ionised as Nmg/l0.00029< 0.00059< 0.00024< 0.00016< 0.00028.0e-05< 0.00013< 0.000410.00031< 0.00091
0162Alkalinity to pH 4.5 as CaCO3mg/l42364630332835393249
0180Orthophosphate, reactive as Pmg/l0.014< 0.010.0170.0150.0670.0170.0280.0190.0570.013
9901Oxygen, Dissolved, % Saturation%92.5106.589.79893.897.199.7100.696.1107.8
9924Oxygen, Dissolved as O2mg/l9.0711.19.3210.611.31211.612.510.110.4