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Residential Precipitation Collection

Concerning the use of rain barrels to collect precipitation from a residential rooftop for nonpotable outdoor uses.

HB16-1005 2016 Regular Session Not stated Water

Cost estimates

At the first note read
Stated in words
FACT January 19, 2016
At the last note read
Stated in words
FACT June 14, 2016
What it actually cost
not published
No Colorado source reports spending for one bill

Every figure here is an estimate by Legislative Council Staff on the date shown, about the version of the bill in front of them that day. It is not a cost.

The appropriation

The note states no appropriation is required.

An appropriation is money the legislature sets aside. It is not money spent.

The appropriation field, read from the note: None.

Bill summary

Section 1 of the act allows the collection of precipitation from a residential rooftop if:

  • A maximum of 2 rain barrels with a combined storage capacity of 110 gallons or less are used;
  • Precipitation is collected from the rooftop of a building that is used primarily as a single-family residence or a multi-family residence with 4 or fewer units;
  • The collected precipitation is used on the residential property on which the precipitation is collected; and
  • The collected precipitation is applied to outdoor purposes such as lawn irrigation and gardening.

Section 1 also requires the state engineer, to the extent practicable within existing resources, to provide information on the permitted use of rain barrels on the state engineer's website. Section 1 further sets forth the procedure by which the state engineer could curtail the use of rain barrels based on a determination of material injury. Finally, section 1 requires the state engineer to report to the agriculture committees in the general assembly in 2019 and 2022 on whether residential precipitation collection has caused any discernible injury to downstream water rights.

Section 2 requires the department of public health and environment, to the extent practicable within existing resources, to develop best practices for nonpotable usage of collected precipitation and vector control and to post any best practices developed on the department's website.

Section 3 prevents a homeowners' association from prohibiting a unit owner from using rain barrels for precipitation collection, with certain exceptions for leased or attached units or common elements. Section 3 allows a homeowners' association to impose reasonable aesthetic requirements on the placement or appearance of a rain barrel.

FACT Bill summary by Colorado Legislative Council Staff, read 2026-09-23. Printed as published, word for word. Source: leg.colorado.gov (opens in a new tab)