| Tregoodwell Stream at Hendrawalls | unnamed stream | 26 km | Last sampled 14 Dec 2022, before the imported period | |
| River Camel at Camelford Bridge | River Camel | 23 km | 11 Aug 2026 · 58 days ago | Oxygen 103.2%Temp 17.1 °CpH 7.85Ammonia below 0.03 mg/l |
| Tributary of Stannon Stream downstream of Pit Discharge | unnamed stream | 22 km | Last sampled 2 May 2007, before the imported period | |
| River Camel upstream of Camelford sewage treatment works | River Camel | 22 km | Last sampled 11 Mar 2002, before the imported period | |
| River Camel downstream of Camelford sewage treatment works | River Camel | 22 km | Last sampled 11 Mar 2002, before the imported period | |
| River Camel at Fenteroon Bridge | River Camel | 21 km | 18 Sep 2026 · 20 days ago | Oxygen 97.9%Temp 13.8 °CpH 7.46Ammonia below 0.03 mg/l |
| River Camel at Trecarne Bridge | River Camel | 19 km | 11 Aug 2026 · 58 days ago | Oxygen 105.3%Temp 16.8 °CpH 7.2Ammonia below 0.03 mg/l |
| River Camel at Gam Bridge | River Camel | 15 km | Last sampled 10 Sep 2015, before the imported period | |
| De Lank River at Bradford Bridge | De Lank River | 15 km | Last sampled 3 Dec 2004, before the imported period | |
| River Camel upstream of St Breward sewage treatment works | River Camel | 13 km | Last sampled 6 Feb 2013, before the imported period | |
| Blisland Stream at Durfold | unnamed stream | 12 km | 13 Jul 2026 · 3 months ago | Oxygen 96.1%Temp 17.4 °CpH 7.12Ammonia 0.006 mg/l |
| River Camel at Wenford | River Camel | 12 km | 18 Sep 2026 · 20 days ago | Oxygen 99.4%Temp 14 °CpH 7.38Ammonia below 0.03 mg/l |
| Blisland Stream upstream of Blisland sewage treatment works | unnamed stream | 11 km | Last sampled 6 Feb 2013, before the imported period | |
| River Camel downstream of Wenford Dries | River Camel | 10 km | Last sampled 11 Feb 2020, before the imported period | |
| De Lank River at Keybridge | De Lank River | 10 km | 15 Sep 2026 · 23 days ago | Oxygen 99.7% May 2026Temp 16.2 °CpH 7.01 May 2026Ammonia below 0.03 mg/l |
| Tredethy Stream at Helligan | unnamed stream | 6.4 km | 27 Jul 2026 · 2 months ago | Oxygen 96.8%Temp 16.2 °CpH 7.85Ammonia below 0.03 mg/l |
| River Camel at Hellandbridge | River Camel | 5.5 km | 18 Sep 2026 · 20 days ago | Oxygen 101.1%Temp 14 °CpH 7.47Ammonia 0.045 mg/l |
| River Camel at Dunmere Bridge | River Camel | 0.6 km | 5 May 2026 · 5 months ago | Oxygen 94.4%Temp 11.6 °CpH 7.35Ammonia below 0.03 mg/l |