Been out of the conversation due to lack of data, my reasons for getting the platypus is this.
I have access to a small watercourse that flows from the ground, through two fields and then into a culvert.
It's pretty good as there are no livestock in the fields, and I'm pretty confident that it's good water with no heavy contamination.
Filtration and boiling are my prefered method for this little stream. I do have a sawyer aswell, also a milbank to prefilter any debris, and a stash of military water purification tablets. So I'm pretty confident, living as I do on exmoor, this system will be adequate for my needs.
Were I living in a city, having to take water from a river, pond or canal, I'd want something better. This suits my needs, so I don't see the point in going over the top, and spending more than nessasary.
If I did, I'd want one of those lifesaver filter jerrycans they use for disaster relief. Can't afford one, and don't need one, so I got the best I could afford. Sawyer for drinking, platypus for all other needs.
Assess the possible situations, and decide the action. Don't overthink things. Worst case scenario here, I might have to take water from the stream, if that's not flowing, there are several others around, and I researched, so know where all the victorian street water pumps are, though they no longer work, tracing them on a local map has shown me where drinkable water is available.
I'm with SW water..the people who provided water to Brixham where the water borne cryptosporidium outbreak happened. I've heard of other problems in the UK recently too,
More rainfall, more incidents, the numbers are horrifying, so decided to make sure I had a backup. Forward thinking,That's all.
Funnily enough, as I write, listening to radio 4 they are talking about this. The pollution statistics are absolutely scary!
Forgot..I also have a steripen!