Colons: Know how to use them?

Can you tell if the colon is used correctly in each of these sentences?

1. Three quaint towns to visit in the Charlevoix region of Quebec are: Saint-Irénée, Les Éboulements and Saint-Siméon.
2. There is plenty to do in the Charlevoix: whale watching, cycling and sampling fine cheeses, of course!
3. It’s no secret: the Bas-Saint-Laurent region boasts some of the most spectacular sunsets in the world.
4. The name “Kamouraska” comes from an Algonquin word and means: “where rushes grow at the water's edge.”
5. Eel was a staple food of Indigenous peoples living along the St. Lawrence because: it was plentiful, nutritious and easily preserved.
6. From the Cap de Bon-Désir observation centre, visitors can observe whale species such as: belugas, porpoises and humpbacks.
7. The title of the article was “Quebec’s Master Sculptors: Médard, André and Jean-Julien Bourgault.”
8. The two cyclists needed immediate shelter: a storm was brewing.
9. Saint-Jean-Port-Joli is identified with prominent cultural figures, including: author Philippe Aubert de Gaspé and wood carver Médard Bourgault.
10. De Gaspé makes clear that his novel draws upon his memories: “All my ambition is to note down some episodes of the good old times, some remembrances of a youth … long passed away.”