Greywater Source & Use Screening Reference
Identify source characteristics, prohibited assumptions and local approvals.
Open step →System hub / validated expansion
Greywater Reuse Planning
Connect measured household greywater supply to an allowed non-potable demand, event distribution, receiving capacity and transparent economics.
Greywater is wastewater, not drinking water. Source definitions, permitted uses, treatment, storage, setbacks and plumbing rules vary by jurisdiction.
5 tools2 guides1 screening referenceSupply → demand → event → basin → cost
The reuse workflow
Allowed sourceMeasured volumeAllowed end useLandscape demandEvent distributionInfiltrationDiversion & maintenance
Start with the local rule and actual source volume. Match that volume to seasonal demand, then test each short discharge event against outlets and receiving basins. Economics comes after a feasible and maintainable layout.
Recommended sequence
Greywater Supply Calculator
Measure fixtures and appliance cycles instead of relying on household defaults.
Open step →Greywater Irrigation Demand Planner
Compare weekly supply with local ET, rainfall and plant demand.
Open step →Laundry-to-Landscape Zone Planner
Turn one laundry event into a whole-outlet distribution.
Open step →Greywater Surge & Basin Checker
Screen receiving capacity and drain-down using field inputs.
Open step →Greywater Reuse Savings Calculator
Use local tariffs and maintenance costs to screen economics.
Open step →Tools on the reuse bench
Greywater Supply Calculator
Estimate measured shower, bath, laundry and bathroom-basin water available for reuse.
Use tool →Greywater Irrigation Demand Planner
Compare reusable supply with ET, rainfall, plant and efficiency-based landscape demand.
Use tool →Laundry-to-Landscape Zone Planner
Distribute one laundry event across a practical whole-outlet range.
Use tool →Greywater Surge & Basin Checker
Screen delivered event volume against entered void capacity and infiltration.
Use tool →Greywater Reuse Savings Calculator
Estimate annual water and sewer savings and simple payback from local tariffs.
Use tool →Planning and troubleshooting
How to Plan a Home Greywater Reuse System
Move from allowed sources and measured volume to demand, distribution, diversion and maintenance.
Read guide →How to Troubleshoot Greywater Irrigation
Investigate runoff, ponding, odor, weak outlets and plant stress without unsafe exposure.
Read guide →Greywater Source & Use Screening Reference
Screen source characteristics, end uses and questions that require local approval.
Open reference →Connected systems
Irrigation & Sprinkler Systems
Use ET demand, hydrozones and field observation to avoid over-application.
Open system →Water Treatment & Water Quality
Keep non-potable quality, exposure, treatment and monitoring boundaries visible.
Open system →Wells, Storage & Rainwater
Compare reuse with other source and storage options without combining unlike water qualities.
Open system →Public-health and plumbing boundary. Never connect greywater to potable piping, spray it where people can contact it, or assume storage is safe. Preserve sewer/septic diversion, avoid runoff and ponding, and obtain the approvals and qualified work required locally.