Hi Baron
It doesn't look like Yorkshire Water give alkalinity in those water quality reports, but then from what I've seen most water companies don't ... I've found, with my water company (United Utilities, over in the NW), that if you contact them and ask them the information you want, they do have it and will give you it
You need to be very specific about what you want, if you need "alkalinity as HCO3" to input into your calculator make sure you ask for that, precisely ... I've found its better to use the Contact Us button on their website to ask, if you phone the helpline you'll spend quite a while having to explain to their "Customer Service Agent" (phone-bot
) that the information you want isn't on their water quality report on their website, but it IS something they will have tested and eventually they'll raise a request with their technical department to send you the info, if you haven't given up and gone to the pub by then ... in my experience, once you get past their "gatekeepers", the men and women in white coats (which is how I imagine them) are REALLY helpful, like it makes a nice change for them to get to do something different than analyse samples and enter data into computer systems, like interacting with customers who ACTUALLY want the data they're producing, validates their jobs
Cheers, PhilB