"Size doesn't matter ..."
| GUC, London AA, Hemel | Stretch code | All-time max. | 2023 max. | 2022 max. | 2021 max. | 2020 max. | Veggie max. | Retro max. | |
| Bourne End, below Little Heath Lane | BouEnL | 50.8gPaRo 2017-05-28 | - | 4.6g | - | - | 35.8g | 41.6g | - |
| Bourne End, above Sharpes Lane | BouEnN | 40.1gWiNe 2017-11-09 | - | - | - | 10.0g | 37.9g | 36.4g | - |
| Bourne End middle, Sharps Lane short pound | BouEnM | 42.6gMcMi 2018-04-14 | - | 15.8g | - | 28.5g | 37.4g | 42.6g | - |
| Bourne End, south, bridge into river | BouEnS | 34.2gWiNe 2019-03-24 | - | - | - | 25.4g | - | 21.9g | - |
| Winkwell north, swingbridge up to lock | WinkwN | 39.2gPaRo 2016-05-10 | - | - | - | - | - | 23.8g | - |
| Winkwell middle, swingbridge south to lock | WinkwM | 20.0gWiNe 2018-04-10 | - | - | - | - | - | - | - |
| Winkwell south, lock to rail bridge | WinkwS | 35.1gMcMi 2017-05-21 | - | - | - | - | 35.1g | 35.1g | - |
| Railway bridge to Boxmoor Top lock 62 | BoxCha | 28.7gWiNe 2017-03-29 | - | - | - | - | - | 25.6g | - |
| Boxmoor top lock 62 to Old Fishery Lane | BoxOFL | 36.7gPaRo 2017-05-14 | - | - | 18.8g | - | 30.2g | 33.3g | - |
| Boxmoor, Old Fishery Lane > Fishery Rd | BoxWes | 33.0gMcMi 2017-03-11 | 16.0g | 17.5g | - | 18.7g | 31.2g | 33.0g | - |
| Boxmoor, Fishery Rd to Station Road | BoxMid | 38.5gBuDa 2011-05-30 | 11.1g | - | - | 20.4g | 25.2g | 25.2g | - |
| Boxmoor, Station Road to lock | BoxEas | 21.4gHoDv 2020-05-15 | 12.3g | - | - | 21.4g | 17.5g | 21.4g | - |
| Boxmoor, lock to Two Waters Road | BoxTwo | 23.0gPaRo 2017-03-12 | 14.5g | - | - | 21.0g | - | 23.0g | - |
| Apsley, Two Waters Road to Durrants Hill | ApsNor | 12.9gWiNe 2017-03-13 | - | - | - | - | 11.8g | 12.7g | - |
| Apsley, Durrants Hill to Sainsburys | ApsSai | 16.2gWiNe 2013-08-20 | - | - | - | - | - | 14.8g | - |
| Apsley, Sainsburys to marina | ApsMar | - | - | - | - | - | - | - | - |
| Apsley, marina to Red Lion Lane | ApsSou | - | - | - | - | - | - | - | - |