Understanding Water Sanitation “Color”

When it comes to window cleaning, water is the number one tool used. Have you ever wondered what the difference is in the “colors” we hear about, like gray water, black water, and even purple water? Keep reading to learn a little bit about each one.

White/Clear Water (a.k.a. Municipal Water)

This is the water that comes straight from your faucet. It’s treated and safe for general use, but it often contains minerals like calcium and magnesium. These minerals cause hard water, which can leave behind spots and streaks on glass. If you’re cleaning windows professionally or want crystal-clear results, filtered or purified water is usually a better bet.

Gray Water

Gray water is gently used water from sinks, washing machines, and showers. Some eco-conscious systems reuse gray water for things like flushing toilets or watering plants. Gray water should never be used for surface or glass cleaning, because it can contain soap residue, oils, and bacteria. 

Black Water

This is wastewater from toilets and anything that’s come into contact with human waste. It’s extremely unsanitary and dangerous to use or be exposed to. Black water should only be handled by professionals trained in hazardous waste disposal. It’s definitely not something that would be used for cleaning anything.

Purple Water

Purple water refers to reclaimed or recycled water that’s been treated for non-potable (non-drinking) uses. You’ll often see purple pipes, or even purple fire hydrants, marking these systems. Generally, states have authority in allocating and developing water resources. Here in California, treated recycled water from sources that contain domestic waste may be used for a variety of non-potable applications, including irrigation, impoundments, and industrial or commercial cooling. However, you don’t want to use this for glass cleaning, since it may still contain fine particles or chemical residues.

There Are No Stupid Questions! We’re Here to Help.

If you have questions about water, want help choosing the right system, or any other tools, don’t hesitate to reach out. Our team is happy to answer your questions and guide you to the right tools and supplies. We feel there really are no stupid questions! Contact us today.