Graywater Systems

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Since 2004, the keystone of Broomfield’s water conservation efforts has been its water reuse system. This system, which is managed and operated by the City and County, provides treated wastewater to a total of approximately 940 acres of irrigated parks in the city and an additional 1,500 acres of non-city owned areas. However, up until now there has not existed a means for residents to participate in water reuse at the individual scale. Broomfield’s graywater ordinance, passed on September 14th, 2021, allows for just that.

Graywater includes water discharged from bathroom and laundry-room sinks, bathtubs, showers, and laundry machines. Graywater does not include water discharged from toilets, urinals, kitchen sinks, dishwashers, or non-laundry utility sinks (this type of wastewater is commonly referred to as “blackwater”). Installing a graywater treatment system in your home is a great way to lower your water bill and help our community conserve valuable water resources!

How to get started

Broomfield residents are authorized to reuse graywater in two ways: outdoor irrigation and indoor toilet and urinal flushing. A laundry to landscape (or L2L) graywater system is a relatively simple system that uses graywater from your laundry machine to irrigate multiple plants or a mulch basin. In addition to L2L, residents have the option to retrofit their plumbing to install a whole house graywater system which diverts graywater to your home’s bathroom fixtures for flushing. Either option is available to new or existing single-family, multi-family, or commercial buildings.

We encourage anyone interested in installing either type of system to refer to our 7 steps for installing and operating any graywater system.


Starting in 2022 laundry to landscape systems may qualify for a $200 rebate! Rebates are awarded to Broomfield water customers on a first come, first served basis, dependent on available funds.

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Contact Us

For more information on graywater systems, contact us at 303.464.5605 or email

To contact the Permitting Department, call 303.438.6373.