Some canals and rivers are wholly within a single CRT Region, others pass through two or more.
The boundaries are intended to be at county council borders and are listed below from CRT's table, which gives more detail.
| Navigation | CRT Regions | Boundaries between Regions |
| Aire & Calder (inc Selby) | Yorkshire & NE | |
| Ashby | East Midlands - West Midlands | Marston Turn |
| Ashton | North West | |
| Birmingham & Fazeley | West Midlands | |
| BCN | West Midlands | |
| Calder & Hebble | Yorkshire & NE | |
| Caldon | West Midlands | |
| Chesterfield | Yorkshire & NE | |
| Coventry | West Midlands | |
| Droitwich Barge | West Midlands - Wales & SW | Lock 1, Hawford Bottom |
| Erewash | East Midlands | |
| Grand Union | West Midlands - East Midlands | Braunston Turn |
| East Midlands - London & SE | Cosgrove Iron Trunk aqueduct over River Great Ouse | |
| Grand Union (Leicester Line) | East Midlands | |
| Grand Union (Northampton Arm) | East Midlands | |
| Hertford Union | London & SE | |
| Huddersfield Broad | Yorkshire & NE | |
| Huddersfield Narrow | North West - Yorks & NE | The Diggle Portal of Standedge Tunnel |
| Kennet & Avon | Wales & SW | Blakes lock (No 107) at Reading |
| Leeds & Liverpool | North West - Yorks & NE | 600m beyond the bottom lock (No 42) at Greenberfield |
| Lee Navigation | London & SE | |
| Llangollen | Wales & SW - West Midlands | Chirk Aqueduct |
| Macclesfield | North West | |
| Manchester, Bolton & Bury | North West | |
| Montgomery | Wales & SW - West Midlands | Bridge 92, Llanymynech |
| Mon & Brec | Wales & SW | |
| New Junction | Yorkshire & NE | |
| Oxford | West Midlands - London & SE | Lift Bridge 141, north of Claydon locks |
| West Midlands - East Midlands | Bridge 93/94 south side | |
| Peak Forest | North West | |
| Regent's | London & SE | |
| Ripon | Yorkshire & NE | |
| Rochdale | North West - Yorks & NE | Bridge 30 |
| North West - Yorks & NE | Bridge 41 | |
| R Severn | West Midlands - Wales & SW | Bridge 16 |
| Shropshire Union | North West - West Midlands | Audlem top lock/Bridge 74 |
| R Soar | East Midlands | |
| South Yorkshire Navigation (inc Sheffield, Stainforth & Keadby) |
Yorkshire & NE | |
| Staffs & Worcs | West Midlands - Wales & SW | Severn Towing Path Bridge |
| Stratford | West Midlands | |
| R Stort | London & SE | |
| R Trent | East Midlands | Gainsborough Road Bridge (No 36) |
| Trent & Mersey | North West - West Midlands | Hardingswood Turn |
| West Midlands - East Midlands | Dove Aqueduct (No 23) between Burton and Willington | |
| Ure Navigation | Yorkshire & NE | |
| Worcs & Birmingham | West Midlands | Bridge 1 |
| Yorkshire Ouse Navigation | Yorkshire & NE |
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