Join Date: Jun 2012
Location: Near Lake Wylie NC
Blue water mystery
We are on well water, and if we fill any large container such as a bucket or tub from outside at the well head or inside the house, the water has a distinct light blue color. It's not strong enough to see in a glass of water, but anything over 3 gallons against a white background starts to become visible as a faint blue color. In a filled bathtub, it appears as if someone added blue bath beads or something similar to the water. It is unmistakably blue.
My initial thought was that we might have a copper problem, but I tested and copper is not present. I assumed we had hard water, because over time, we get some very hard to remove white deposits on the shower glass that CLR (Calcium, Rust, Lime) and soap scum remover products will not touch. It must be removed by using Bartender's Friend and a lot of elbow grease. Our water also does not feel slimey like soft water often does.
However, on testing, I found our water is very soft. GH tested around 1-2 dH. KH was at around 2 dH. A TDS meter shows 42 PPM out of the faucet. I do show some nitrates in our water (5 PPM), which doesn't really surprise me, since we live in a rural area with farming. 0 Ammonia, 0 nitrites. Out of the tap, the water is slightly acidic at around 6.8.
I've read that blue-green algae may cause blue water, but this is true blue with no green tint. Our aquifer is in solid granite about 350 ft deep. We are, however, about 1/2 mile from a large lake.
I know we had our well tested when we built our house, and I don't recall anything weird. We obviously passed the health inspection. I will have another test done soon, but does anyone have an idea what the blue might be?
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