Coombe Adit

EA name: COOMBE ADIT
Environment Agency sampling point SW-81931010 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)

These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.

Where and when

Last sampled
21 Aug 2026, 14:0241 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
35 since 20 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
Latest sample
Minewater Monitoring (national agency policy)
Where
National Grid 196015, 51620As published, to the nearest 1 m. Open in a map
River, by its own name
Its name does not give one
River, by the map
An unnamed streamPlaced by position alone (the only river line close by), 1 m from the line.
Next gauge downstream
Trenowth On the River Fal · 2.8 km along the river
Why it was sampled
Monitoring (national agency policy) (35 samples)

Everything measured here

51 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.

Show all 102 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 87.8% 3 Jan 2024
Oxygen, Dissolved, % Saturation 9901 Minewater 30 Nov 2023 – Aug 2026 92.8% 21 Aug 2026
Oxygen, Dissolved as O2 9924 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 9.5 mg/l 3 Jan 2024
Oxygen, Dissolved as O2 9924 Minewater 30 Nov 2023 – Aug 2026 9.89 mg/l 21 Aug 2026
Temperature of Water 0076 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 11.7 °C 3 Jan 2024
Temperature of Water 0076 Minewater 31 Nov 2023 – Aug 2026 12.4 °C 21 Aug 2026
pH 0061 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 5.69 3 Jan 2024
pH 0061 Minewater 31 Nov 2023 – Aug 2026 5.86 21 Aug 2026
Ammoniacal Nitrogen as N 0111 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 0.03 mg/l 3 Jan 2024
Ammoniacal Nitrogen as N 0111 Minewater 31 Nov 2023 – Aug 2026 below 0.03 mg/l 21 Aug 2026
Conductivity at 25 C 0077 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 234 µS/cm 3 Jan 2024
Conductivity at 25 C 0077 Minewater 30 Feb 2024 – Aug 2026 268 µS/cm 21 Aug 2026
Alkalinity to pH 4.5 as CaCO3 0162 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 17 mg/l 3 Jan 2024
Alkalinity to pH 4.5 as CaCO3 0162 Minewater 31 Nov 2023 – Aug 2026 13 mg/l 21 Aug 2026
Aluminium 6057 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 150 µg/l 3 Jan 2024
Aluminium 6057 Minewater 32 Nov 2023 – Aug 2026 48 µg/l 21 Aug 2026
Aluminium, Dissolved 6037 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 140 µg/l 3 Jan 2024
Aluminium, Dissolved 6037 Minewater 32 Nov 2023 – Aug 2026 40 µg/l 21 Aug 2026
Arsenic 6046 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 14 µg/l 3 Jan 2024
Arsenic 6046 Minewater 32 Nov 2023 – Aug 2026 8 µg/l 21 Aug 2026
Arsenic, Dissolved 6045 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 3.6 µg/l 3 Jan 2024
Arsenic, Dissolved 6045 Minewater 32 Nov 2023 – Aug 2026 2.8 µg/l 21 Aug 2026
Barium 6062 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 10 µg/l 3 Jan 2024
Barium 6062 Minewater 32 Nov 2023 – Aug 2026 below 10 µg/l 21 Aug 2026
Barium, Dissolved 9446 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 10 µg/l 3 Jan 2024
Barium, Dissolved 9446 Minewater 32 Nov 2023 – Aug 2026 below 10 µg/l 21 Aug 2026
Boron 6059 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 100 µg/l 3 Jan 2024
Boron 6059 Minewater 32 Nov 2023 – Aug 2026 below 100 µg/l 21 Aug 2026
Boron, Dissolved 9447 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 100 µg/l 3 Jan 2024
Boron, Dissolved 9447 Minewater 32 Nov 2023 – Aug 2026 below 100 µg/l 21 Aug 2026
Cadmium 0108 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 1.9 µg/l 3 Jan 2024
Cadmium 0108 Minewater 32 Nov 2023 – Aug 2026 1.7 µg/l 21 Aug 2026
Cadmium, Dissolved 0106 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 1.9 µg/l 3 Jan 2024
Cadmium, Dissolved 0106 Minewater 32 Nov 2023 – Aug 2026 1.6 µg/l 21 Aug 2026
Calcium 0241 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 9.7 mg/l 3 Jan 2024
Calcium 0241 Minewater 32 Nov 2023 – Aug 2026 11 mg/l 21 Aug 2026
Calcium, Dissolved 0239 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 9.7 mg/l 3 Jan 2024
Calcium, Dissolved 0239 Minewater 32 Nov 2023 – Aug 2026 11 mg/l 21 Aug 2026
Chloride 0172 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 23 mg/l 3 Jan 2024
Chloride 0172 Minewater 32 Nov 2023 – Aug 2026 25 mg/l 21 Aug 2026
Chromium 3164 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 0.5 µg/l 3 Jan 2024
Chromium 3164 Minewater 32 Nov 2023 – Aug 2026 below 0.5 µg/l 21 Aug 2026
Chromium, Dissolved 3409 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 0.5 µg/l 3 Jan 2024
Chromium, Dissolved 3409 Minewater 32 Nov 2023 – Aug 2026 below 0.5 µg/l 21 Aug 2026
Copper 6452 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 65 µg/l 3 Jan 2024
Copper 6452 Minewater 32 Nov 2023 – Aug 2026 27 µg/l 21 Aug 2026
Copper, Dissolved 6450 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 64 µg/l 3 Jan 2024
Copper, Dissolved 6450 Minewater 32 Nov 2023 – Aug 2026 25 µg/l 21 Aug 2026
Hardness, Total as CaCO3 0158 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 61.3 mg/l 3 Jan 2024
Hardness, Total as CaCO3 0158 Minewater 32 Nov 2023 – Aug 2026 72.7 mg/l 21 Aug 2026
Ionic Balance 7044 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 -3.78% 3 Jan 2024
Ionic Balance 7044 Minewater 31 Nov 2023 – Aug 2026 -4.48% 21 Aug 2026
Iron 6051 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 980 µg/l 3 Jan 2024
Iron 6051 Minewater 32 Nov 2023 – Aug 2026 3500 µg/l 21 Aug 2026
Iron, Dissolved 6460 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 620 µg/l 3 Jan 2024
Iron, Dissolved 6460 Minewater 32 Nov 2023 – Aug 2026 3100 µg/l 21 Aug 2026
Lead 0050 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 2 µg/l 3 Jan 2024
Lead 0050 Minewater 32 Nov 2023 – Aug 2026 below 2 µg/l 21 Aug 2026
Lead, Dissolved 0052 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 2 µg/l 3 Jan 2024
Lead, Dissolved 0052 Minewater 32 Nov 2023 – Aug 2026 below 2 µg/l 21 Aug 2026
Lithium 6064 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 100 µg/l 3 Jan 2024
Lithium 6064 Minewater 32 Nov 2023 – Aug 2026 below 100 µg/l 21 Aug 2026
Lithium, Dissolved 4201 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 100 µg/l 3 Jan 2024
Lithium, Dissolved 4201 Minewater 32 Nov 2023 – Aug 2026 below 100 µg/l 21 Aug 2026
Magnesium 0237 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 9.1 mg/l 3 Jan 2024
Magnesium 0237 Minewater 32 Nov 2023 – Aug 2026 11 mg/l 21 Aug 2026
Magnesium, Dissolved 0235 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 9 mg/l 3 Jan 2024
Magnesium, Dissolved 0235 Minewater 32 Nov 2023 – Aug 2026 11 mg/l 21 Aug 2026
Manganese 6050 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 680 µg/l 3 Jan 2024
Manganese 6050 Minewater 32 Nov 2023 – Aug 2026 2000 µg/l 21 Aug 2026
Manganese, Dissolved 6458 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 670 µg/l 3 Jan 2024
Manganese, Dissolved 6458 Minewater 32 Nov 2023 – Aug 2026 2000 µg/l 21 Aug 2026
Nickel 6462 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 28 µg/l 3 Jan 2024
Nickel 6462 Minewater 32 Nov 2023 – Aug 2026 34 µg/l 21 Aug 2026
Nickel, Dissolved 3410 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 28 µg/l 3 Jan 2024
Nickel, Dissolved 3410 Minewater 32 Nov 2023 – Aug 2026 33 µg/l 21 Aug 2026
Nitrite as N 0118 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 below 0.004 mg/l 3 Jan 2024
Nitrite as N 0118 Minewater 32 Nov 2023 – Aug 2026 below 0.004 mg/l 21 Aug 2026
Nitrogen, Total Oxidised as N 0116 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 3.7 mg/l 3 Jan 2024
Nitrogen, Total Oxidised as N 0116 Minewater 32 Nov 2023 – Aug 2026 1.8 mg/l 21 Aug 2026
Potassium 0211 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 2.6 mg/l 3 Jan 2024
Potassium 0211 Minewater 32 Nov 2023 – Aug 2026 2.6 mg/l 21 Aug 2026
Potassium, Dissolved 0209 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 2.6 mg/l 3 Jan 2024
Potassium, Dissolved 0209 Minewater 32 Nov 2023 – Aug 2026 2.7 mg/l 21 Aug 2026
Redox Potential 6988 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 200.8 millivolt 3 Jan 2024
Redox Potential 6988 Minewater 28 Feb 2024 – Aug 2026 138.5 millivolt 21 Aug 2026
Silica, reactive as SiO2 0182 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 14 mg/l 3 Jan 2024
Silica, reactive as SiO2 0182 Minewater 32 Nov 2023 – Aug 2026 16 mg/l 21 Aug 2026
Sodium 0207 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 15 mg/l 3 Jan 2024
Sodium 0207 Minewater 32 Nov 2023 – Aug 2026 16 mg/l 21 Aug 2026
Sodium, Dissolved 0205 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 15 mg/l 3 Jan 2024
Sodium, Dissolved 0205 Minewater 32 Nov 2023 – Aug 2026 16 mg/l 21 Aug 2026
Strontium 6063 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 58 µg/l 3 Jan 2024
Strontium 6063 Minewater 32 Nov 2023 – Aug 2026 60 µg/l 21 Aug 2026
Strontium, Filtered 6693 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 58 µg/l 3 Jan 2024
Strontium, Filtered 6693 Minewater 32 Nov 2023 – Aug 2026 61 µg/l 21 Aug 2026
Sulphate as SO4 0183 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 41 mg/l 3 Jan 2024
Sulphate as SO4 0183 Minewater 32 Nov 2023 – Aug 2026 64 mg/l 21 Aug 2026
Zinc 6455 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 640 µg/l 3 Jan 2024
Zinc 6455 Minewater 32 Nov 2023 – Aug 2026 980 µg/l 21 Aug 2026
Zinc, Dissolved 3408 Minewater (flowing/pumped) 3 Oct 2023 – Jan 2024 650 µg/l 3 Jan 2024
Zinc, Dissolved 3408 Minewater 32 Nov 2023 – Aug 2026 970 µg/l 21 Aug 2026

FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.

Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.

Contains OS data © Crown copyright and database rights 2026.