Los Angeles vs Palmdale
How do recycled water rules rules compare between Los Angeles, CA and Palmdale, CA?
Los Angeles and Palmdale have similar restriction levels.
Los Angeles, CA
Los Angeles County
LAMC §121.04(d) requires new commercial developments larger than 5 acres, and projects sited near an existing recycled-water main, to install purple-pipe dual plumbing for irrigation, cooling, and approved non-potable uses. The LADWP Recycled Water Master Plan identifies expansion corridors.
View full Los Angeles rules →Palmdale, CA
Los Angeles County
LA County Sanitation Districts produce tertiary-treated recycled water at facilities like Whittier Narrows and San Jose Creek for irrigation and industrial use, distributed through purple-pipe systems regulated under LACO Title 11.38 and Title 22 CCR.
View full Palmdale rules →Key Facts Comparison
| Fact | Los Angeles | Palmdale |
|---|---|---|
| Code section | LAMC §121.04(d) | - |
| Trigger size | Commercial above 5 acres | - |
| Pipe color | Purple per state standard | Purple |
| Approved uses | Irrigation, cooling, flushing | - |
| Backflow rule | LAMC §64.41 annual test | - |
| Producer | - | LA County Sanitation Districts |
| Treatment level | - | Tertiary disinfected (Title 22) |
| Local code | - | LACO Title 11.38 |
| Major plant | - | Whittier Narrows |
Highlighted rows indicate differences between cities.
Los Angeles FAQ
Does my new home need recycled-water plumbing?
Generally no. The LAMC §121.04(d) mandate targets commercial and industrial parcels at or above 5 acres, or projects sitting on a planned recycled-water main. Single-family homes are exempt.
What plumbing standards apply to purple pipe?
California Plumbing Code Chapter 15 and LAMC §121.04(d) require dedicated purple-color piping, signage at every outlet, separation from potable lines, and an annual certified backflow inspection under LAMC §64.41.
Palmdale FAQ
Can I use recycled water at my home?
Single-family residential use is rare. Recycled water mostly serves large landscape, golf, industrial, and dual-plumbed commercial customers within designated service areas. Residential bulk fill stations exist for landscaping during droughts.
Why are some new buildings dual-plumbed?
LACO Title 11.38 and similar city ordinances require commercial and industrial buildings within recycled-water service areas to install separate purple-pipe distribution for toilets and irrigation, even before service is connected.
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