Woo, low-alkalinity water, AKA aggressive water, is going to cause all kinds of problems. Some plumbing fittings imported in recent years are likely to have lots of lead, because lead improves the workability of brass. If you ever drink tap water, fill a glass and discard it, twice, before drinking any. Don't have baths.<p>Appliances like washing machines are going to have to be treated pretty much as disposables too.<p>If there are, er, <i>were</i>, any cast-iron water mains in the network, well, they're very leaky sponges now. Concrete pipes too, if any. The pH is supposed to be 8-ish for a reason.<p>With an old network and an old house/old neighborhood, the tapping (the pipe from the street main to your house) could be made of lead too. Should have been replaced, but who knows? Not great.<p>There's probably more (effects on clothes laundered maybe?, biofilms in the pipes?), but it was a while ago that I had anything to do with water reticulation.<p>How to fix this? I assume you've called your water supplier already, and been met with crickets. (They are supposed to be sampling the water at various points in the network regularly.)<p>Depends how much you can spend. There is automatic pH/alkalinity dosing equipment for small private water schemes, but I have no idea of names or prices.<p>Alternatively, get an accredited inorganic testing lab to take samples and prepare a report, and get them to recommend a lawyer who knows the relevant legislation. A better approach, if you care about anyone outside your household or about being community minded.<p>Yay yay yay, lucky you. Sorry.