| 18 Deepdale Road | River Ribble via a surface water sewer | Not Discharging | 08:33 Aug 11 2025 | 16:36 Jun 13 |
| 2 Mill Lane Combined Sewer Overflow | Savick Brook via surface water sewer | Not Discharging | 23:42 Jun 01 | 16:36 Jun 13 |
| 208 Deepdale Road CSO | Moor Brook Culvert | Not Discharging | 23:52 Jun 01 | 16:36 Jun 13 |
| 75 Lower Bank Road CSO | Eaves Brook | Not Discharging | 08:00 Apr 22 2025 | 16:36 Jun 13 |
| Albyn Street East CSO 33102 | Swill Brook Culvert, a tributary of River Ribble | Not Discharging | 13:32 May 16 | 16:36 Jun 13 |
| Bank Parade CSO | River Ribble Estuarine Waters | Not Discharging | 13:05 Jun 11 | 16:36 Jun 13 |
| Banksfield Avenue CSO 33027 | Savick Brook a tributary of the River Ribble Estuary | Not Discharging | 23:52 Jun 01 | 16:36 Jun 13 |
| Black Bull Mh C1 CSO 331eq | Savick Brook | Not Discharging | 07:44 Jun 09 | 16:36 Jun 13 |
| Brownedge Lane CSO 401gr | Cockshott Brook a tributary of the River Darwen | Not Discharging | 23:08 Sep 20 2025 | 16:36 Jun 13 |
| Cann Bridge Street CSO 40042 | River Darwen | Not Discharging | 15:38 May 14 | 16:36 Jun 13 |
| Cattle Market CSO | Eaves Brook, a tributary of Savick Brook, a tributary of the River Ribble | Not Discharging | 22:03 Mar 25 | 16:36 Jun 13 |
| Causey Way Combined Sewer Overflow | Boundary Brook (tributary of the River Ribble) | Not Discharging | 08:52 Jun 12 | 16:36 Jun 13 |
| Cop Lane CSO | Tributary of the River Ribble, via a surface water sewer | Not Discharging | 07:40 Mar 22 | 16:36 Jun 13 |
| Cuerdale Lane CSO 401qm | River Ribble | Not Discharging | 13:22 Oct 28 2025 | 16:36 Jun 13 |
| Dale Street CSO 331r7 | River Ribble (Tidal) | Not Discharging | 12:02 Sep 29 2025 | 16:36 Jun 13 |
| Duddle Lane CSO | Hennel Brook, A Tributary of the River Darwin | Not Discharging | 02:48 Mar 25 | 16:36 Jun 13 |
| Factory Lane CSO | Boundary Brook, a tributary of the River Ribble | Not Discharging | 10:58 Apr 20 | 16:36 Jun 13 |
| Field East Of River Darwin CSO | River Darwin | Not Discharging | 16:18 Jun 11 | 16:36 Jun 13 |
| Fishergate Hill CSO (Chamber C9) | River Ribble | Not Discharging | 13:02 Jun 11 | 16:36 Jun 13 |
| Fishergate Hill CSO Chamber C8 | River Ribble via Chain Caul culvert | Not Discharging | 11:16 Jun 03 | 16:36 Jun 13 |
| Frenchwood Knoll CSO 331ux | Swillbrook Culvert a tributary of the River Ribble (Tidal) | Not Discharging | 17:24 Jun 03 | 16:36 Jun 13 |
| Garstang Road Bridge CSO 333eh | Savick Brook | Not Discharging | 24:00 Jun 02 | 16:36 Jun 13 |
| George Street CSO 331vj | An unnamed culverted tributary of River Ribble | Not Discharging | 13:54 Jun 11 | 16:36 Jun 13 |
| Halsbury Street CSO 331xr | Swill Brook Culvert, a tributary of the River Ribble | Not Discharging | 15:44 Sep 20 2025 | 16:36 Jun 13 |
| Haslam Park North And South Combined Sewer Overflow (Site Id 33026) (Pre0090) | Savick Brook | Not Discharging | 24:00 Jan 01 1970 | 16:36 Jun 13 |
| Haslam Park North And South Combined Sewer Overflow (Site Id 33026) (Pre0090) | Savick Brook | Not Discharging | 03:54 Jun 12 | 16:36 Jun 13 |
| Hennel Lane CSO | River Darwen | Not Discharging | 16:08 Jun 13 | 16:36 Jun 13 |
| Holme Road Combined Sewer Overflow | River Ribble | Not Discharging | 13:42 Jun 11 | 16:36 Jun 13 |
| London Road | River Ribble via surface water sewer | Not Discharging | 24:00 Jan 01 1970 | 16:36 Jun 13 |
| Manchester Rd/Selbourne Rd CSO | River Ribble via Swillbrook Culvert | Not Discharging | 17:12 Jun 22 2025 | 16:36 Jun 13 |
| Manor House Lane CSO 33037 | Eaves Brook, a tributary of Savick Brook, a tributary of the River Ribble | Not Discharging | 09:36 Apr 13 | 16:36 Jun 13 |
| Marsh Lane CSO Pre0021 | Chain Caul culvert, via a surface water sewer | Not Discharging | 08:48 Sep 17 2025 | 16:36 Jun 13 |
| Moorbrook Street CSO 332f2 | Culverted section of Moor Brook a tributary of the River Ribble Estuary | Not Discharging | 23:56 Jun 01 | 16:36 Jun 13 |
| Percy Street CSO | Storm Culvert, a tributary of the River Ribble | Not Discharging | 23:28 Dec 07 2025 | 16:36 Jun 13 |
| Powis Road CSO 332mg Pre0025 | Chain Caul Culvert | Not Discharging | 14:57 Mar 17 | 16:36 Jun 13 |
| Ribbleton Lane CSO 33103 | River Ribble (Tidal) via a surface water sewer | Not Discharging | 09:36 Apr 01 | 16:36 Jun 13 |
| Riverside Road CSO | River Ribble (Tidal) | Not Discharging | 15:17 Mar 09 | 16:36 Jun 13 |
| Sharoe Green Hospital CSO 333jk | Savick Brook | Not Discharging | 18:34 Jun 12 | 16:36 Jun 13 |
| Sharoe Green Lane CSO 33034 | Savick Brook | Not Discharging | 24:20 Jun 02 | 16:36 Jun 13 |
| St Georges Road CSO | Moore Brook Culvert, a tributary of River Ribble via a surface water sewer | Not Discharging | 23:38 Jun 01 | 16:36 Jun 13 |
| St Pauls Road CSO | Mersey Estuary | Not Discharging | 13:12 Jun 11 | 16:36 Jun 13 |
| TBC | River Ribble via a surface water sewer | Not Discharging | 11:24 Jun 11 | 16:36 Jun 13 |
| TBC | Savick Brook | Not Discharging | 07:40 Oct 25 2025 | 16:36 Jun 13 |
| Valley Road Pumping Station | River Ribble Estuarine Waters | Not Discharging | 13:22 Jan 28 | 16:36 Jun 13 |
| Victoria Rd CSO 33023 | Eaves Brook | Not Discharging | 24:10 Jun 02 | 16:36 Jun 13 |
| Walton-Le-Dale STW | Tidal Ribble River | Not Discharging | 16:19 May 13 | 16:36 Jun 13 |
| Watery Lane CSO | Sutton Mill Brook | Not Discharging | 15:40 Jun 12 | 16:36 Jun 13 |
| Watery Lane CSO Pre0108 | Chain Caul Culvert | Not Discharging | 02:02 Sep 21 2025 | 16:36 Jun 13 |
| Watery Lane CSO Shaft C1 Pre0093 | Moorbrook Culvert | Not Discharging | 01:36 May 12 | 16:36 Jun 13 |
| Watery Lane Douglas St CSO Pre0110 | River Ribble via Chain Caul Culvert and/or Wards Storm Culvert | Not Discharging | 18:18 Jun 12 | 16:36 Jun 13 |
| Watling Street Road CSO 33024 | Eaves Brook a tributary of Savick Brook | Not Discharging | 16:16 Feb 17 | 16:36 Jun 13 |
| West Strand CSO Chamber C10 Pre0071 | Chain Caul Culvert | Not Discharging | 08:37 Mar 04 | 16:36 Jun 13 |
| Wolseley Road CSO | River Ribble Estuarine Waters | Not Discharging | 09:00 Sep 21 2025 | 16:36 Jun 13 |
