Summary

In New Mexico, no permit is required to use a greywater system when the flow is less than 250 gallons per day.

More information

House Bill 711, passed in 2005, related to water:

shall not require a permit for applying less than two hundred fifty gallons per day of private residential gray water originating from a residence for the resident's household gardening, composting or landscape irrigation if:

1. a constructed gray water distribution system provides for overflow into the sewer system or on-site
   wastewater treatment and disposal system;
2. a gray water storage tank is covered to restrict access and to eliminate habitat for mosquitos or other
   vectors;
3. a gray water system is sited outside of a floodway;
4. gray water is vertically separated at least five feet above the ground water table;
5. gray water pressure piping is clearly identified as a nonpotable water conduit;
6. gray water is used on the site where it is generated and does not run off the property lines;
7. gray water is applied in a manner that minimizes the potential for contact with people or domestic pets;
8. ponding is prohibited, application of gray water is managed to minimize standing water on the surface and to ensure that the hydraulic capacity of the soil is not exceeded;
9. gray water is not sprayed;
10. gray water is not discharged to a watercourse; and
11. gray water use within municipalities or counties complies with all applicable municipal or county
    ordinances enacted pursuant to Chapter 3, Article 53 NMSA 1978;
    

For the expert

Read the full version of the greywater regulation in New Mexico here.