Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.
Streams and rivers with a gauge whose water joins the Isla (Tayside) above one of its gauges, from the source down. The river map knows where gauges are, not every stream, so a tributary without a gauge is not listed here.
11 storm overflows are traced upstream of Links Farm, the Isla (Tayside)’s lowest gauge on the river map: on the Isla (Tayside) itself, on its gauged tributaries, and on smaller streams that join above there.
0 report discharging now
8 not discharging
3 offline or silent: 3 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Links Farm: 569 overflow events over 719 hours in total, across the 10 that have a figure. 1 has no 2025 figure. Scottish Water counts overflow events, not the 12/24-hour spills counted in England and Wales, so this total cannot be set beside theirs.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Isla (Tayside) includes the smaller streams that join it there.
Between Forter and Wester Cardean6 overflows
Alyth Bridge St CSO No246485Monitor offline Scottish Water · into Alyth Burn · 9.2 km by river above Wester Cardean · 2025: 31 overflow events, 14 h
Alyth James St CSO No248484Not discharging Scottish Water · into Alyth Burn · 9.1 km by river above Wester Cardean · 2025: 14 overflow events, 5.3 h
Alyth, David Street CSONot discharging Scottish Water · into Alyth Burn · 9.1 km by river above Wester Cardean · 2025: 3 overflow events, 0.6 h
Alyth, Diamond Jubilee Park CSOMonitor offline Scottish Water · into Alyth Burn · 8.9 km by river above Wester Cardean · 2025: 20 overflow events, 5.3 h
Alyth STW Inlet Works 6 Dwf CSONot discharging Scottish Water · into Alyth Burn · 8.3 km by river above Wester Cardean · 2025: 88 overflow events, 332 h
Alyth WwTW Ssso 2014 No256483Monitor offline Scottish Water · into Alyth Burn · 8.3 km by river above Wester Cardean · 2025: 2 overflow events, 0.3 h
Dean Water, above Dean Bridgejoins the Isla (Tayside) above Balbrogie2 overflows
Glamis WwTW CSONot discharging Scottish Water · into Glamis Burn · 15.6 km by river above Dean Bridge · 2025: 119 overflow events, 164 h
Glamis WwTW - Post-Psts SssoNot discharging Scottish Water · into Glamis Burn · 15.6 km by river above Dean Bridge · 2025: 139 overflow events, 177 h
Between Balbrogie and Links Farm3 overflows
Blairgowrie Mill Street CSO No180452Not discharging Scottish Water · into River Ericht · 20.4 km by river above Links Farm · 2025: 12 overflow events, 2.6 h
Rattray Boat Brae CSO No182453Not discharging Scottish Water · into River Ericht · 20.3 km by river above Links Farm · 2025: 141 overflow events, 17 h