Slow the Flow Sprinkler Evaluations & Services

Save Your Spot for 2026

Thanks to your incredible support, we completed over 2,400 residential and non-residential sprinkler evaluations and nearly 200 smart controller and rain installations in 2025, helping to make waterwise landscapes the norm in Colorado.

Want to join the waterwise movement?

Join the 2026 interest list for a Slow the Flow Sprinkler Evaluation!

Nonprofit Resource Central’s free Slow the Flow sprinkler evaluations and services help Coloradans use their outdoor water wisely. Our professional team will be on-site to perform irrigation tests and a visual inspection, provide a customized watering schedule, educate you about your sprinkler system, and recommend ways to improve efficiency and reduce water waste.

Residential or non-residential sprinkler evaluations are available for FREE in partnering water provider districts. Appointments are available on a first-come, first-served basis during the irrigation season, typically June through August.

Join the 2026 Interest List for a Residential Sprinkler Evaluation

Pressure gauge on an sprinkler system in Colorado yard

We’ll evaluate the sprinkler system at your personal home. This includes a visual inspection of your irrigation zones, efficiency tests, and a customized watering schedule.

Join the 2026 Waitlist for a Non-residential Sprinkler Evaluation

Blue catch cups spaced throughout a grassy yard with sprinklers watering the grass.

We’ll evaluate the sprinkler system at your business, HOA, or other institutional property. We’ll recommend actionable steps to improve its efficiency and reduce water waste.

Learn about our Smart Controller and Rain Sensor Installations

Rachio sprinkler smart controller and a smart phone with the Rachio app.

Stop watering during a rainstorm! We’ll upgrade your personal home’s irrigation system with a smart controller or rain sensor installation at little to no cost to you.

In 2025, 99% of residential sprinkler systems we evaluated had inefficiencies

Visit the Inspiration Hub

Find resources to get started on a waterwise yard transformation, and before and after landscaping projects submitted by Coloradans at WaterwiseYards.org!

Saving water for over 20 years

Our Slow the Flow program officially launched in 2004 with the goal of helping Colorado homeowners optimize their outdoor water use. Since then, we have partnered with over 50 water providers along the Front Range to provide sprinkler evaluations for homes, businesses, HOAs, schools, parks, and beyond. To date, we have completed over 40,000 sprinkler evaluations and installed over 1,300 smart controllers and rain sensors, saving an estimated 215+ million gallons of water!

Community Reviews

4.5 star rating overall

“This was an amazing service! The technician who performed our evaluation did a thorough walk-through, made recommendations along the way, and helped us to adjust our sprinkler schedule. It was really valuable. Overall, this was a great experience and super helpful!“

CITY OF LOVELAND UTILITIES PARTICIPANT, 2025

“The technician was fantastic- she gave me the confidence to take on some DIY improvements to our garden and adjust our sprinkler system to better meet our needs. She also shared thoughtful recommendations to increase water efficiency and ensure our lawn and garden are getting just the right amount of water. I highly recommend this program to anyone. It’s a wonderful resource that can really make a difference.“

CITY OF LAKEWOOD PARTICIPANT, 2025

“The technician was very knowledgeable and shared the steps of the process. He reset our sprinkler clock to water more efficiently by breaking the watering into shorter times but multiple cycles. Our lawn is doing better since the adjustment.“