what's the gray residue in my water
September 19, 2009 6:39 PM Subscribe
What's the gray residue in my water? We moved into this home (built circa 1985) 2 years ago. After bathwater has drained, you find a silty residue left in the tub. You can't see it in the water itself. Residue looks a bit like the calcium deposits one might find normally, but ranges from gray to sometimes sandy brown. Lately there is also some substance much like this clinging to dishes after the dishwasher runs too.
posted by keener_sounds to Home & Garden (5 answers total) 1 user marked this as a favorite
Have been working with city water company for a whole year -- they tested the water and found nothing of concern; they put a filter into the ground to test water coming into my home and first said it was clear, then on another test they too found gray substance on the filter -- they said it "contains" iron and manganese (but if it contains anything else, they don't know.) They also said that iron and manganese do not pose a health risk. They asked me to scrape up accumulated bits of the residue after each bath so they could test it -- this took a long time as it's hard to get much up at once without it disintigrating -- and then they said it couldn't be tested because there was soap in it (duh!). I'm frustrated and don't know how concerned I should be for my family's health. How would one even know if this was coming from one's own pipes? I was looking into a private lab, but the ones the city recommended are meant for corporate testing. Does anyone know what this stuff might be? I live in central Indiana. If anyone has any insights, I'd be very grateful.