You’ll hear people talk about gray water and black water — but not everyone uses the term dark gray water, so let’s clear that up. 💧 Gray water = lightly used water Think sinks, showers, laundry (without harsh chemicals). 💧 Dark gray water = heavily used gray water Water from kitchen sinks or washing very dirty loads. It’s not sewage — but it does require more planning and care. 🚽 Black water = sewage Toilets and anything mixed with human waste. Why this matters 👇 If you’re planning off-grid