Think latest is Malpas pontoon has 1.2m at CD but then 16m of soft mud (according to harbour master!)
Now just 2 visitors buoys (yellow) at the top of channel just short of the visitors pontoon.

Charges for boats over 40ft on the pontoons is £25/night

I reviewed these notes in April 2022. Malpas has several pontoons now and there is still a detached pontoon out on the river. The hammer-head there looks as though it might get busy with tripping boats/ferries. The prices haven't changed much and the Cornish harbours website is easy to navigate. I've checked and the charges they quote for moorings are inclusive of VAT and Harbour Charges.

I believe the pontoon has 0.9m at CD but we were there at Neaps so can't be sure
Coffee shop and deli now open. Good for some essentials and up-market provisioning.
Found a couple of green buoys short of Malpas without pick ups. HM told us they were "temporary" visitor buoys !

I reviewed these notes in October 2021. The improvements noted by our member below have been researched and added to the text; many thanks. Truro is now under the control of cornish harbours and their website is quite informative.

Whilst looking for the visitor buoys off Malpas we came across a brand new council run walk ashore about 150ft long. There is a tap and a single toilet/shower wet room adjacent to the HMs office. £25 a night. Quiet and beautiful. Easy access to the Heron Inn. Looks like they are building some sort of coffee shop here as well with benches outside. HM didn’t object to me swimming in the river at HW from pontoon.

Port of Truro is now managed by Cornwall Council Harbours Board. The website is www.cornwallharbours.co.uk

Smugglers Cottage Restaurant is definitely closed until there is new management

Smugglers Cottage Restaurant is definitely closed until there is new management

I reviewed these notes at the end of March 2021. I am still trying to get some definitive info on the Smugglers Cottage Restaurant. Truro has upped it's prices by a couple of pounds. From Tyro's comments below it would appear to be a good idea to consult the HM on mooring outside his office due the doubts about the bottom!!