Weekly non-potable demand estimator
Use actual fixture data
Replace the example values with appliance labels, measured irrigation use or utility records. Indoor uses may not be allowed without treatment, backflow protection, permits and inspection.
Separate essential and optional demand
A drought plan can prioritize toilet flushing or high-value plants while reducing lawn or cleaning use when storage is low.
Planning estimate only: Verify local rainfall, product ratings, structural support, overflow, plumbing, water-quality and permit requirements.