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 Somerset Frome 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.
26 storm overflows are traced upstream of Tellisford, the Somerset Frome’s lowest gauge on the river map: on the Somerset Frome itself, on its gauged tributaries, and on smaller streams that join above there.
0 report discharging now
24 not discharging
2 offline or silent: 1 monitor offline, 0 status unknown, 1 no live feed
Official figures for 2025, for the overflows traced upstream of Tellisford: 452 spills over 3,248 hours in total, across the 25 that have a figure. 1 had no usable monitor data that year.
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 Somerset Frome includes the smaller streams that join it there.
Above Frome Rodden, the Somerset Frome’s highest gauge6 overflows
Witham Friary Pumping StationNot discharging Wessex Water · into River Frome · 12.5 km by river above Frome Rodden · 2025: 17 spills, 163 h
Trudoxhill Pumping StationNot discharging Wessex Water · into Tributary Of River Frome · 9.1 km by river above Frome Rodden · 2025: 53 spills, 584 h
Divers Bridge Pumping StationNot discharging Wessex Water · into Rodden Brook · 5.5 km by river above Frome Rodden · 2025: 2 spills, 15 h
Adderwell Close CSONot discharging Wessex Water · into River Frome (Via Sws) · 1.1 km by river above Frome Rodden · 2025: 58 spills, 107 h · reaches the river through a sewer, so where it enters is approximate
Portway Locks Hill CSONot discharging Wessex Water · into River Frome · 250 m by river above Frome Rodden · 2025: 17 spills, 2.2 h
Wallbridge Combined Sewer OverflowNot discharging Wessex Water · into River Frome · 230 m by river above Frome Rodden · 2025: 3 spills, 11 h
Between Frome Rodden and Tellisford13 overflows
North Of Carpet Factory CSONot discharging Wessex Water · into River Frome · 13.6 km by river above Tellisford · 2025: 4 spills, 0.6 h
Rodden Road CSONot discharging Wessex Water · into River Frome(Via Sws) · 13.1 km by river above Tellisford · 2025: 2 spills, 2.2 h · reaches the river through a sewer, so where it enters is approximate
Court House Combined Sewer OverflowNot discharging Wessex Water · into River Frome · 12.6 km by river above Tellisford · 2025: 19 spills, 5.6 h
Merchants Barton CSONot discharging Wessex Water · into River Frome (Via Sws) · 12.6 km by river above Tellisford · 2025: 17 spills, 4.3 h · reaches the river through a sewer, so where it enters is approximate
8 Market Place CSOMonitor offline Wessex Water · into River Frome Via Sws · 12.5 km by river above Tellisford · 2025: 6 spills, 1.1 h · reaches the river through a sewer, so where it enters is approximate
Westway Precinct Car Park CSONot discharging Wessex Water · into River Frome · 12.4 km by river above Tellisford · 2025: 3 spills, 0.2 h
Frome Wastewater Treatment WorksNot discharging Wessex Water · into River Frome(S) · 11.6 km by river above Tellisford · 2025: 0 spills, 0 h
Frome Wastewater Treatment WorksNot discharging Wessex Water · into River Frome(S) · 11.6 km by river above Tellisford · 2025: 22 spills, 60 h
Whatcombe Road CSONot discharging Wessex Water · into River Frome Via Sws · 11.5 km by river above Tellisford · 2025: 31 spills, 10 h · reaches the river through a sewer, so where it enters is approximate
Youth Centre CSONot discharging Wessex Water · into River Frome · 11.3 km by river above Tellisford · 2025: 21 spills, 6.8 h
Beckington WwTWNot discharging Wessex Water · into River Frome · 5.9 km by river above Tellisford · 2025: 11 spills, 132 h
Rode Combined Sewer OverflowNot discharging Wessex Water · into Trib Of The River Frome · 2.6 km by river above Tellisford · 2025: 3 spills, 7.1 h
Rode Wastewater Treatment WorksNot dischargingbathing water Wessex Water · into Somerset Frome(S) · 2.2 km by river above Tellisford · 2025: 39 spills, 522 h
Mells River, above Stoke Bottom Farmjoins the Somerset Frome above Tellisford1 overflow
Oakhill WwTWNot discharging Wessex Water · into Mells Stream · 1.2 km by river above Stoke Bottom Farm · 2025: 5 spills, 30 h
Mells River, above Vallisjoins the Somerset Frome above Tellisford5 overflows
Kings Head CSONot discharging Wessex Water · into Mells Stream · 8.8 km by river above Vallis · 2025: 26 spills, 77 h
Nunney Castle CSONo live feed Wessex Water · into Nunney Brook(S) · 5.2 km by river above Vallis · 2025: no data
Nunney Wastewater Treatment WorksNot discharging Wessex Water · into Nunney Brook · 4.4 km by river above Vallis · 2025: 77 spills, 1,383 h
Mells PSNot discharging Wessex Water · into Mells Stream(S) · 3.8 km by river above Vallis · 2025: 0 spills, 0 h
Mells Wastewater Treatment WorksNot discharging Wessex Water · into Mells Stream · 3.3 km by river above Vallis · 2025: 0 spills, 0 h
Nunney Brook, above Holwelljoins the Mells River1 overflow
Wanstrow PSNot discharging Wessex Water · into Trib Of The Nunney Brook(S) · 4.9 km by river above Holwell · 2025: 16 spills, 123 h
Near these gauges, connection not known
Within 3 km of one of the Somerset Frome’s gauges in a straight line, but the river map cannot say whether their water reaches it.
Feltham Drive CSONot discharging Wessex Water · into Adderwell Brook · 1.2 km from Frome Rodden in a straight line · no mapped watercourse close enough to be sure · 2025: 13 spills, 0.6 h
Lower Keyford CSONot discharging Wessex Water · into Trib Of River Frome (Via Sws) · 1.3 km from Frome Rodden in a straight line · reaches the river through a sewer or culvert · 2025: 58 spills, 81 h
Church Lane Farm PSNot discharging Wessex Water · into Trib Of Lam Brook Stream · 2.1 km from Tellisford in a straight line · its watercourse is not on the river map · 2025: 40 spills, 524 h
Westwood Water Recycling CentreNot discharging Wessex Water · into Tributary Of River Frome · 2.1 km from Tellisford in a straight line · its watercourse is not on the river map · 2025: 30 spills, 421 h
Marston Lane Pumping StationNot discharging Wessex Water · into Tributary Of Nunney Brook · 2.6 km from Frome Rodden in a straight line · no mapped watercourse close enough to be sure · 2025: 0 spills, 0 h
Dated samples taken by the Environment Agency, not live readings. Results are published days to months after the sample is taken, and many points are sampled only a few times a year, or have not been sampled for years.
46 sampling points on the Somerset Frome and the streams that join it above Tellisford, and below it. 9 have a sample from the last 12 months; 16 have any sample banked.
Sampled most recently, anywhere on the Somerset Frome and its streams:
Mells River at Blacker's Woodunnamed stream · 3.9 km above Stoke Bottom FarmLast sampled 30 Sep 2026 · 8 days agoOxygen 96.5% Aug 2026Temp 12.2 °C Aug 2026pH 8.44 Aug 2026Ammonia 0.006 mg/l Aug 2026
S. Frome Tellisford MillRiver Frome · 1.0 km above TellisfordLast sampled 21 Sep 2026 · 17 days agoOxygen 106.3% Aug 2026Temp 19 °C Aug 2026pH 8.17 Aug 2026Ammonia 0.039 mg/l Aug 2026
Where, from the source down
Sampling points
Newest sample
Mells River and its streamsjoins the Somerset Frome above Tellisford
England's samples only. Each count opens the list of those points, nearest first, with the date of each one’s latest sample (the gauge’s “Upstream of here” list).
FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.