| 28 Tythebarn St | River Darwen | Not Discharging | 12:54 Apr 15 | 17:21 Apr 27 |
| Accrington Road CSO | Culverted section of Knuzden Brook | Not Discharging | 13:18 Feb 20 | 17:21 Apr 27 |
| Anyon Street/Laurel Ave CSO | Culverted tributary of River Darwen (Union Street) | Not Discharging | 20:46 Apr 24 | 17:21 Apr 27 |
| Back Queens Park Rd | Culverted Tributary of River Blakewater | Not Discharging | 07:30 Dec 20 2024 | 17:21 Apr 27 |
| Balle Street Hilton Street CSO | Culverted section of River Darwen | Not Discharging | 15:28 Mar 26 | 17:21 Apr 27 |
| Balle Street Hilton Street CSO | A culverted section of the River Darwen via a surface water sewer | Not Discharging | 14:10 Mar 26 | 17:21 Apr 27 |
| Belgrave Road CSO | Tributary of the River Darwen | Not Discharging | 24:00 Jan 01 1970 | 17:21 Apr 27 |
| Bolton Road CSO | Unnamed tributary of the River Darwen | Not Discharging | 24:00 Jan 01 1970 | 15:52 Dec 20 2024 |
| Bolton Road CSO | Culverted Tributary of the River Darwen | Not Discharging | 21:48 Apr 26 | 17:21 Apr 27 |
| Bolton Road/Astley Street CSO | Kebbs Brook via a culvert, a tributary of the River Darwen | Not Discharging | 07:44 Apr 09 | 17:21 Apr 27 |
| Church Street/Parliament Street CSO | Culverted section of River Darwen | Not Discharging | 08:50 Mar 15 | 17:21 Apr 27 |
| Clarence Street CSO | River Darwen | Not Discharging | 20:05 Feb 23 | 17:21 Apr 27 |
| Coal Pit Lane CSO | River Medlock (via surface water sewer) | Not Discharging | 13:10 Apr 17 | 17:21 Apr 27 |
| Cotton Hall Street CSO | Culverted tributary of River Darwen | Not Discharging | 12:34 Feb 20 | 17:21 Apr 27 |
| Cranberry Lane CSO | Unnamed tributary of the River Darwen | Not Discharging | 06:34 Jan 01 | 17:21 Apr 27 |
| Cumberland Street CSO | Queens Park Culvert (Tributary of River Blakewater) | Not Discharging | 13:15 Feb 20 | 17:21 Apr 27 |
| Dickens Street CSO | Queens Park Culvert (tributary of River Blakewater) | Not Discharging | 03:40 Jan 27 | 17:21 Apr 27 |
| Footpath Nr Cross St CSO | River Darwen | Not Discharging | 17:00 Apr 27 | 17:21 Apr 27 |
| Grimshaw Park CSO | Culverted section of an unnamed trib. of River Blakewater | Not Discharging | 24:00 Jan 01 1970 | 17:21 Apr 27 |
| Grimshaw Street CSO | River Darwen via SWS | Not Discharging | 12:25 Apr 14 | 17:21 Apr 27 |
| Higher Perry St/Black Laurel St CSO | Culverted tributary of River Darwen via surface water sewer | Not Discharging | 11:16 Mar 28 | 17:21 Apr 27 |
| Hindle Street CSO | River Darwen via surface water sewer | Not Discharging | 13:28 Mar 28 | 17:21 Apr 27 |
| Kay Street CSO | Culverted tributary of the River Darwen | Not Discharging | 02:30 Jan 27 | 17:21 Apr 27 |
| Lower Audley CSO | Culverted tributary of River Blakewater | Not Discharging | 11:30 Apr 23 | 17:21 Apr 27 |
| Lower Eccleshill Road CSO | River Darwen | Not Discharging | 11:36 Jan 09 | 17:21 Apr 27 |
| Merchants Landing Culvert St CSO | River Blakewater via the Culvert street culvert | Not Discharging | 21:48 Apr 23 | 17:21 Apr 27 |
| Pringle Street CSO | Culverted tributary of River Blakewater | Not Discharging | 03:02 Dec 21 2024 | 17:21 Apr 27 |
| Queens Park Road CSO | Queens Park Culvert and then to the River Blakewater via surface water sewer | Not Discharging | 03:15 Jan 27 | 17:21 Apr 27 |
| Railway Road/South Street CSO | A culverted section of River Darwen | Not Discharging | 12:46 Jan 30 | 17:21 Apr 27 |
| Redearth Road/Sudell Road CSO | Culverted section of River Darwen | Not Discharging | 23:32 Dec 20 2024 | 17:21 Apr 27 |
| Sudell Road CSO | Culverted tributary of River Darwen | Not Discharging | 24:24 Apr 22 | 17:21 Apr 27 |
| Sudellside Street | Culverted tributary of the River Darwen via a surface water sewer | Not Discharging | 24:00 Jan 01 1970 | 17:21 Apr 27 |
| Vale Street | Tributary of the River Darwen | Not Discharging | 07:10 Mar 13 | 17:21 Apr 27 |
| Waterside CSO 052z1 | Waterside Brook | Not Discharging | 04:30 Jan 27 | 17:21 Apr 27 |
| Woodvale Flats CSO | Tributary of the River Darwen | Not Discharging | 04:02 Apr 19 | 17:21 Apr 27 |