sampling point
River Venn At Bishops Tawton
| Description | RIVER VENN AT BISHOPS TAWTON |
|---|---|
| Sampling point ID | SW-73012702 |
| Type | Freshwater – Rivers |
| Status | open |
| Location |
easting northing: 256790 130310 lat lon: 51.054224, -4.044695 |
| Area | Devon And Cornwall |
| Sub-Area | East Devon And Cornwall |
| Summary | 241 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.
75 determinands have been measured at this site
- Action taken
- Alky pH 4.5
- Ammonia(N)
- As - DWt
- As-Filtered
- Avian Mito
- BOD ATU
- Bac All
- Bac Ruminant
- BacHF183
- C - Org Filt
- CHLOR A
- CHLOROPHYLL
- COD as O2
- Ca Filtered
- Cadmium - Cd
- Calcium - Ca
- Canine Mito
- Cd DW <63
- Cd - Dry Wt
- Cd Filtered
- Chloride Ion
- Cond @ 20C
- Cond @ 25C
- Cr - Dry Wt
- Cr- Filtered
- Cu - Dry Wt
- Cu BLM Bio
- Cu Filtered
- DrySolids30C
- F Coli Pre
- Fe- Filt
- Hardness
- Hdnss Ca
- Hdnss Mg
- Human Mito
- MST Filter
- MST Report
- Magnesium-Mg
- Mg Filtered
- Mineral Oils
- Mn BLM Bio
- Mn- Filtered
- N Inorganic
- N Oxidised
- NH3 un-ion
- Ni - Dry Wt
- Ni BLM Bio
- Ni- Filtered
- Nitrate-N
- Nitrite-N
- O Diss %sat
- Oil & Grs Vs
- Orthophospht
- Oxygen Diss
- Pb - Dry Wt
- Pb BLM Bio
- Pb Filtered
- Phenol Odour
- PhenolicOdor
- Potassium- K
- Prep: DNA
- Sample Prep
- SiO2 Rv
- Sld Sus@105C
- StrepF PMF
- Temp Water
- TriBT Cation
- Type of Flow
- WethPresPrec
- Zinc - as Zn
- Zn - Dry Wt
- Zn BLM Bio
- Zn- Filtered
- pH
Sampling results
Displaying the twenty most recent samples. You can see all 241 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 14 Oct 2021 to 1 Feb 2024
| Notation | Determinand | Units | 14 Oct 2021 09:06 | 5 Nov 2021 12:23 | 3 Dec 2021 09:47 | 13 Jan 2022 09:47 | 14 Feb 2022 09:00 | 2 Mar 2022 10:10 | 26 May 2023 14:24 | 10 Oct 2023 11:29 | 24 Nov 2023 12:15 | 1 Feb 2024 12:23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0052 | Lead, Dissolved | μg/l | < 0.1 | < 0.1 | < 0.1 | < 0.1 | ||||||
| 0061 | pH | 7.64 | 7.46 | 7.61 | 7.82 | 7.82 | 7.6 | 8.05 | 7.86 | 7.59 | 7.76 | |
| 0076 | Temperature of Water | °C | 10.1 | 9.5 | 8.6 | 6.4 | 7.9 | 8.9 | ||||
| 0077 | Conductivity at 25 C | μs/cm | 288 | 256 | 240 | 258 | 264 | 276 | ||||
| 0106 | Cadmium, Dissolved | μg/l | 0.26 | 0.052 | 0.21 | 0.25 | ||||||
| 0111 | Ammoniacal Nitrogen as N | mg/l | < 0.03 | < 0.03 | < 0.03 | < 0.03 | < 0.03 | < 0.03 | ||||
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 2.8 | 3.6 | 2.5 | 3.8 | 2.5 | 2.5 | ||||
| 0117 | Nitrate as N | mg/l | 2.8 | 3.6 | 2.5 | 3.8 | 2.49 | 2.5 | ||||
| 0118 | Nitrite as N | mg/l | < 0.004 | < 0.004 | 0.0049 | 0.0041 | 0.0057 | 0.0045 | ||||
| 0119 | Ammonia un-ionised as N | mg/l | < 0.00024 | < 0.00015 | < 0.0002 | < 0.00028 | < 0.00031 | < 0.0002 | ||||
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 77 | 62 | 60 | 61 | 67 | 65 | ||||
| 0180 | Orthophosphate, reactive as P | mg/l | 0.021 | 0.019 | 0.04 | 0.021 | 0.04 | 0.023 | ||||
| 0235 | Magnesium, Dissolved | mg/l | 17 | 6.8 | 7.2 | 6.9 | ||||||
| 0239 | Calcium, Dissolved | mg/l | 55 | 32 | 32 | 32 | ||||||
| 0301 | Carbon, Organic, Dissolved as C :- {DOC} | mg/l | 1.3 | 1.6 | 1.8 | 1.4 | ||||||
| 3377 | Lead : BLM Bioavailable | μg/l | 0.04 | 0.03 | 0.03 | 0.04 | ||||||
| 3410 | Nickel, Dissolved | μg/l | 14 | 5.8 | 10 | 10 | ||||||
| 3878 | Nickel : BLM Bioavailable | μg/l | 8 | 4.8 | 6.5 | 7 | ||||||
| 9901 | Oxygen, Dissolved, % Saturation | % | 98.6 | 98.6 | 92.6 | 101.4 | 98.9 | 99 | ||||
| 9924 | Oxygen, Dissolved as O2 | mg/l | 11.1 | 11.2 | 10.8 | 12.5 | 11.7 | 11.5 |
Samples from 5 Dec 2018 to 13 Sep 2021
| Notation | Determinand | Units | 5 Dec 2018 13:21 | 25 Apr 2019 12:33 | 8 Jul 2019 09:55 | 22 Oct 2019 11:32 | 22 Jan 2020 12:14 | 10 May 2021 11:17 | 28 Jun 2021 12:27 | 20 Jul 2021 10:51 | 20 Aug 2021 10:35 | 13 Sep 2021 10:46 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0052 | Lead, Dissolved | μg/l | < 0.1 | < 0.1 | < 0.1 | < 0.1 | < 0.1 | |||||
| 0061 | pH | 7.5 | 8.14 | 8.17 | 7.59 | 7.5 | 8 | 7.8 | 7.93 | 7.9 | 7.9 | |
| 0076 | Temperature of Water | °C | 11.4 | 15 | 17.2 | 15.5 | 15.2 | |||||
| 0077 | Conductivity at 25 C | μs/cm | 356 | 279 | 350 | 326 | 352 | |||||
| 0106 | Cadmium, Dissolved | μg/l | 0.148 | 0.251 | 0.14 | 0.23 | 0.57 | |||||
| 0111 | Ammoniacal Nitrogen as N | mg/l | < 0.03 | < 0.03 | < 0.03 | < 0.03 | < 0.03 | |||||
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 1.6 | 1.8 | 1.9 | 1.9 | 1.3 | |||||
| 0117 | Nitrate as N | mg/l | 1.59 | 1.79 | 1.89 | 1.9 | 1.3 | |||||
| 0118 | Nitrite as N | mg/l | 0.0088 | 0.011 | 0.0065 | < 0.004 | < 0.004 | |||||
| 0119 | Ammonia un-ionised as N | mg/l | < 0.00061 | < 0.0005 | < 0.00079 | < 0.00065 | < 0.00064 | |||||
| 0158 | Hardness, Total as CaCO3 | mg/l | 99.2 | 133 | 141 | 97.9 | 120 | |||||
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 83 | 75 | 90 | 88 | 94 | |||||
| 0180 | Orthophosphate, reactive as P | mg/l | < 0.01 | 0.05 | 0.024 | 0.025 | 0.024 | |||||
| 0235 | Magnesium, Dissolved | mg/l | 6.15 | 9.08 | 10 | 6.2 | 8.5 | |||||
| 0237 | Magnesium | mg/l | 6.09 | 8.87 | 10 | 6.3 | 8.4 | |||||
| 0239 | Calcium, Dissolved | mg/l | 29.6 | 38.1 | 40 | 29 | 34 | |||||
| 0241 | Calcium | mg/l | 27.9 | 37.7 | 39 | 29 | 33 | |||||
| 0301 | Carbon, Organic, Dissolved as C :- {DOC} | mg/l | 2.09 | 1.81 | 1.5 | 1.7 | 1 | |||||
| 3377 | Lead : BLM Bioavailable | μg/l | 0.02 | 0.03 | 0.03 | 0.03 | 0.05 | |||||
| 3408 | Zinc, Dissolved | μg/l | 28.4 | 71.2 | 54 | 69 | 160 | |||||
| 3410 | Nickel, Dissolved | μg/l | 5.78 | 12.8 | 11 | 8.1 | 19 | |||||
| 3878 | Nickel : BLM Bioavailable | μg/l | 2.87 | 10.7 | 9.64 | 4.66 | 10 | |||||
| 4821 | Copper : BLM Bioavailable | μg/l | 0.46 | 0.47 | 1.38 | 0.22 | 0.37 | |||||
| 6045 | Arsenic, Dissolved | μg/l | < 1 | < 1 | < 1 | < 1 | < 1 | |||||
| 6450 | Copper, Dissolved | μg/l | 3.8 | 1.83 | 4.2 | 1.4 | 1.4 | |||||
| 6455 | Zinc | μg/l | 52.4 | 98.2 | 78 | 79 | 190 | |||||
| 6460 | Iron, Dissolved | μg/l | 42.1 | 82.5 | 110 | 50 | < 30 | |||||
| 9901 | Oxygen, Dissolved, % Saturation | % | 101 | 91 | 95.8 | 99 | 96 | |||||
| 9924 | Oxygen, Dissolved as O2 | mg/l | 11 | 9.15 | 9.2 | 9.85 | 9.61 |