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 Nith above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
2 gauged tributaries, 2 gauges
Scaur Water name from the river map
Joins the Nith between Drumlanrig and Friars Carse, no more than 15.4 km by river above Friars Carse.
Named streams on the river map that flow into the Nith 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.
Afton Water (joins about 7.9 km above Hall Bridge)
17 storm overflows are traced upstream of Whitesands, the Nith’s lowest gauge on the river map: on the Nith itself, on its gauged tributaries, and on smaller streams that join above there.
1 reports discharging now
14 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 Whitesands: 1,045 overflow events over 4,759 hours in total, across the 12 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 Nith includes the smaller streams that join it there.
Between Dalgig and Hall Bridge1 overflow
New Cumnock, 5 Castle Pl/Castle SyphonNot discharging Scottish Water · into Afton Water · 8.2 km by river above Hall Bridge · 2025: 10 overflow events, 22 h
Between Hall Bridge and Drumlanrig6 overflows
Wanlockhead WwTW CSONot discharging Scottish Water · into Wanlock Water · 36.5 km by river above Drumlanrig · 2025: no data
Wanlockhead WwTW SssoNot discharging Scottish Water · into Wanlock Water · 36.5 km by river above Drumlanrig · 2025: 38 overflow events, 523 h
Kirkconnel STW CSONot discharging Scottish Water · into River Nith · 20.9 km by river above Drumlanrig · 2025: no data
Sanquhar WwTW CSONot discharging Scottish Water · into Un-Named Tributary Of River Nith · 16.3 km by river above Drumlanrig · 2025: 137 overflow events, 148 h
Between Drumlanrig and Friars Carse1 overflow
Thornhill WwTW (D&g) SssoNot discharging Scottish Water · into River Nith · 13.0 km by river above Friars Carse · 2025: 51 overflow events, 921 h
Between Friars Carse and Greensands6 overflows · 1 discharging now
Lincluden WwTW CSONot discharging Scottish Water · into Cluden Water · 3.4 km by river above Greensands · 2025: 42 overflow events, 104 h
Lincluden WwTW SssoDischarging now since Scottish Water · into Cluden Water · 3.4 km by river above Greensands · 2025: 370 overflow events, 2,687 h
Dumfries County Golf Course CSONot discharging Scottish Water · into River Nith · 1.4 km by river above Greensands · no official annual figure
33 Nunholm Rd/Albany Pl CSO Nx973771Not discharging Scottish Water · into River Nith · 1.3 km by river above Greensands · 2025: 76 overflow events, 34 h
Dumfries Elmbank School CSO Nx973766Not discharging Scottish Water · into River Nith · 790 m by river above Greensands · no official annual figure
Cluden Water, above Fiddlers Fordjoins the Nith above Greensands2 overflows
Moniaive WwTW CSO And EONot discharging Scottish Water · into Dalwhat Water · 25.7 km by river above Fiddlers Ford · 2025: 0 overflow events, 0 h
Moniaive WwTW SssoNot discharging Scottish Water · into Dalwhat Water · 25.7 km by river above Fiddlers Ford · 2025: 0 overflow events, 0 h
Between Greensands and Whitesands1 overflow
11 Mill Road/Old Bridge CSO Nx968759Not discharging Scottish Water · into River Nith · 460 m by river above Whitesands · 2025: 153 overflow events, 164 h
Near these gauges, connection not known
Within 3 km of one of the Nith’s gauges in a straight line, but the river map cannot say whether their water reaches it.
4 Kenmure Ter/Susp Bridge CSO Nx971757Not discharging Scottish Water · into River Nith · 50 m from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 1 overflow event, 1.0 h
Dumfries 2 Linden Grove/Dock Park CSONot discharging Scottish Water · into River Nith · 160 m from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 94 overflow events, 99 h
Dumfries 9 Burns Street CSONot discharging Scottish Water · into Mill Burn · 190 m from Whitesands in a straight line · no mapped watercourse close enough to be sure · 2025: 3 overflow events, 0.3 h
Troqueer WwTW CSO And EONot discharging Scottish Water · into River Nith · 1.0 km from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 115 overflow events, 399 h
Troqueer WwTW 1950 Nx971745Not discharging Scottish Water · into River Nith · 1.0 km from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 0 overflow events, 0 h
Dumfries 161 Brooms Road CSOMonitor offline Scottish Water · into Mill Burn · 1.1 km from Whitesands in a straight line · its watercourse is not on the river map · 2025: 64 overflow events, 22 h
Dalswinton WwTW CSOMonitor offline Scottish Water · into Dalswinton Loch · 1.2 km from Friars Carse in a straight line · discharges to a loch, lake or reservoir · 2025: 0 overflow events, 0 h
Troqueer WwTW - 3dwf Post-Pst SssoNot discharging Scottish Water · into River Nith · 1.3 km from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 104 overflow events, 427 h
Dumfries, Dhucorse SPS CSONot discharging Scottish Water · into Un-Named Tributary Of River Nith · 1.8 km from Greensands in a straight line · no mapped watercourse close enough to be sure · no official annual figure
Dumfries Carrick Rd Dm CSO Nx953773Not discharging Scottish Water · into Maryholm Burn (Culverted) · 1.9 km from Greensands in a straight line · its watercourse is not on the river map · 2025: 0 overflow events, 0 h
Dumfries Hillview Dm CSO Nx994753Not discharging Scottish Water · into Un-Named Watercourse · 2.2 km from Whitesands in a straight line · its watercourse is not on the river map · 2025: 3 overflow events, 0.5 h
Dumfries Rashgill SPS CSONot discharging Scottish Water · into Dow Lochar · 2.4 km from Whitesands in a straight line · no mapped watercourse close enough to be sure · 2025: 0 overflow events, 0 h
Kingholm Wwps CSO 2001 Nx975733Monitor offline Scottish Water · into River Nith · 2.4 km from Whitesands in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 512 overflow events, 360 h
Dumfries Kingholm Road CSOMonitor offline Scottish Water · into River Nith · 2.6 km from Whitesands in a straight line · its watercourse is not on the river map · no official annual figure
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