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 Earn above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Named streams on the river map that flow into the Earn and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.
Dunning Burn (joins about 2.7 km above Forteviot Bridge)
Storm overflows upstream
10 storm overflows are traced upstream of Bridge of Earn, the Earn’s lowest gauge on the river map: on the Earn itself, on its gauged tributaries, and on smaller streams that join above there.
0 report discharging now
8 not discharging
2 offline or silent: 2 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Bridge of Earn: 227 overflow events over 842 hours in total, across the 5 that have a figure. 2 had no data that year; 3 have 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 Earn includes the smaller streams that join it there.
Above Aberuchill, the Earn’s highest gauge1 overflow
St Fillans WwTW SssoNot discharging Scottish Water · into River Earn · 6.4 km by river above Aberuchill · 2025: 83 overflow events, 392 h
Between Dalginross and Crieff3 overflows
Comrie WwTW SssoNot discharging Scottish Water · into River Earn · 10.0 km by river above Crieff · no official annual figure
Macrosty Park CSO 2014 Nn860221Not discharging Scottish Water · into Tributary Of Turret Burn · 2.4 km by river above Crieff · 2025: 50 overflow events, 21 h
Crieff WwTW CSO Nn860200Not discharging Scottish Water · into River Earn · 10.9 km by river above Kinkell Bridge · no official annual figure
Between Kinkell Bridge and Forteviot Bridge4 overflows
Aberuthven WwTW CSOMonitor offline Scottish Water · into Ruthven Water · 12.0 km by river above Forteviot Bridge · 2025: no data
Aberuthven WwTW SssoMonitor offline Scottish Water · into Ruthven Water · 12.0 km by river above Forteviot Bridge · 2025: no data
Dunning, Glenburn/Thimblerow CSONot discharging Scottish Water · into Dunning Burn · 6.7 km by river above Forteviot Bridge · 2025: 13 overflow events, 2.1 h
Dunning, 22 Ochil Gardens CSONot discharging Scottish Water · into Dunning Burn · 6.2 km by river above Forteviot Bridge · 2025: 4 overflow events, 0.8 h
Between Forteviot Bridge and Bridge of Earn1 overflow
Forgandenny WwTW CSO No093191Not discharging Scottish Water · into River Earn · 7.1 km by river above Bridge of Earn · 2025: 77 overflow events, 426 h
Near these gauges, connection not known
Within 3 km of one of the Earn’s gauges in a straight line, but the river map cannot say whether their water reaches it.
Bridge Of Earn, Back Street CSONot discharging Scottish Water · into Diech Burn · 150 m from Bridge of Earn in a straight line · its recorded watercourse is not the one mapped beside it · no official annual figure