Who Gives A Fish Forums

Most English water companies do provide the general hardness, or GH, value for their water supply, albeit it may take some digging to find it on their website. If you're willing to share the name of your water company, I'd be happy to help you track down the relevant information. However, it's worth noting that not many companies provide the carbonate hardness, or KH, value, and if they do, they often refer to it as alkalinity.