Douglas County Conservation District


     PO BOX 688, 7519A E HWY 86, FRANKTOWN, CO 80116   303-218-2622

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  RAINWATER HARVESTING WORKSHOP JUNE 16, 2018  Workshop attendees

            Twenty-Five landowners attended the workshop at Hidden Mesa a Douglas County Open Space in Franktown, CO.  They learned the current Colorado Rainwater Collection Laws, they helped to create and install a rain barrel harvesting system, and they learned about the many benefits or rainwater harvesting by: conserving water, saving money on water bills, and growing resilient plants.
If you have any questions, or would like to learn more about Rainwater Collection, email us, or call 303-218-2622.                  

                                                Crowd of Participants                 Barb Borrero Participant                 Workshop

Workshop attendee, Anne Ruybal, purchsed a barrel and hardware kit at the workshop so she could install her own 55 gallon rainwater collection system.  Anne installed her system with the help of her son on Saturday afternoon.  The barrel was filled up with the Sunday, June 17th rains.
                                                                                                    Anne Ruybal barrel
"I'm so happy that you had the workshop so I could find out how easy it really is and get motivated to actually do it!"
Anne Ruybal

 How to Legally Harvest Rainwater in Colorado         Rainwater Collection Fact sheet for both Bills

                                                                                                                                           1 inch of rain collected from a 1000 sq ft roof equals 600 gallons of water!

Urban Rainwater Collection HB 16-1005 Passed  

             The Governor signed HB16-1005 on May 12, 2016.  It is finally now legal for Colorado residence to collect 110 gallons of  rainwater  off their residential urban rooftop. This took affect August 10, 2016.    Please read through HB 16-1005 for more information.           


Senate Bill 09-080 was passed by the General assembly and signed by the Governor during the 2009 legislative session.  This bill allows certain property owners who rely on certain types of wells for their water supply, limited collection and use of precipitation, only if:

     1. The property on which the collection takes place is residential property; and

     2. The landowner uses a well, or is legally entitled to a well, for the water supply; and

     3. The well is permitted for domestic uses according to Section 37-92-602, C.R.S., or Section 37-90-105, C.R.S.   (generally, this means the permit number will be five or six digits with no "-F" suffix at the end); and

     4. There is no water supply available in the area from a municipality or water district; and

     5. The rainwater is collected only from the roof of a building that is used primarily as a residence; and

     6. The water is used only for those uses that are allowed by, and identified on, the well permit. 

If you do not meet, at a minimum, ALL of the above criteria, then the change in the law does not affect you and the current restrictions on collecting rainwater still apply.  This law was effective on July 1, 2009. 

Here is more information about SB-09-080 Rainwater Collection in Colorado,

On June 8, 2013 the Douglas County Conservation District and the Rural Water Authority of Douglas County hosted a rainwater Harvesting Workshop in Castle Rock.  It was a wonderful way to learn about the laws and regulations in the state to collect rain and snowmelt for water conservation.    Sixty nine landowners and Five vendors listened to the four presentations on introduction to rain harvesting, laws and incentives, rainwater collection systems, and estimating runoff, etc.  The Colorado Division of Water Resources website has more information on SB 09-080 at   and the "Rooftop Precipitation Collection System" permit application (Form No. GWS-78) can be found online at


Introduction to Rainwater Harvesting - Hari Krishna

Laws and Incentives for Texas and other states - Hari Krishna

Estimating Runoff - Hari Krishna

Presentations by Hari Krishna the founder of the American Rainwater Catchment Systems Association (ARCSA) - 


        CHF Services, LLC -

        Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) - 

        Free Water Systems, LLC -

        Front Range Precast Concrete, Inc -

See "Water Conservation" Page for water saving information