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 Annan 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 Annan 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.
4 storm overflows are traced upstream of Brydekirk, the Annan’s lowest gauge on the river map: on the Annan itself, on its gauged tributaries, and on smaller streams that join above there.
0 report discharging now
3 not discharging
1 offline or silent: 1 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Brydekirk: 77 overflow events over 458 hours in total, across the 2 that have a figure. 2 had no data that year. 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 Annan includes the smaller streams that join it there.
Between Meikleholm Bridge and Woodfoot2 overflows
Moffat WwTW CSO And EONot discharging Scottish Water · into River Annan · 3.8 km by river above Woodfoot · 2025: 66 overflow events, 277 h
Moffat WwTW SssoMonitor offline Scottish Water · into River Annan · 3.8 km by river above Woodfoot · 2025: 11 overflow events, 181 h
Between Woodfoot and Brydekirk2 overflows
Ecclefechan WwTW SssoNot discharging Scottish Water · into Mein Water · 6.2 km by river above Brydekirk · 2025: no data
Ecclefechan Wwps CSO And EONot discharging Scottish Water · into Mein Water · 6.2 km by river above Brydekirk · 2025: no data
Near these gauges, connection not known
Within 3 km of one of the Annan’s gauges in a straight line, but the river map cannot say whether their water reaches it.
Brydekirk River St CSO 1960 Nt576320Not discharging Scottish Water · into Jennymill Burn · 420 m from Brydekirk in a straight line · its recorded watercourse is not the one mapped beside it · no official annual figure
Chapelcross, Chapelcross Wks & Creca CSOMonitor offline Scottish Water · into River Annan · 2.5 km from Brydekirk in a straight line · no mapped watercourse close enough to be sure · 2025: 75 overflow events, 655 h
Chapelcross WwTW-Postprelim Screen CSONot discharging Scottish Water · into River Annan · 2.5 km from Brydekirk in a straight line · no mapped watercourse close enough to be sure · 2025: 5 overflow events, 113 h