Centennial Water Softeners & Water Treatment

About Centennial Water

Most of Centennial is served by the South Suburban Water District, which blends purchased Denver Water supply with its own infrastructure. Some areas are served directly by Denver Water. This blending is the primary reason Centennial's water averages 8.3 GPG — slightly higher than Denver's 7.8 GPG.

Source water originates from South Platte River surface water combined with local groundwater supplies. The mix varies seasonally: in spring, surface water dominates and hardness drops slightly; in late summer, groundwater contribution increases and hardness rises.

Centennial's newer residential development means many homes have modern plumbing, but scale buildup in water heaters and on fixtures is a consistent complaint among residents without treatment systems.

Recommended Treatment for Centennial

At 8.3 GPG, a 40,000–48,000 grain salt-based water softener is the recommended choice for a family of three or four in Centennial. The slightly elevated hardness compared to Denver warrants a higher-capacity system to handle peak demand efficiently.

High-efficiency metered softeners (demand-initiated regeneration) are particularly well-suited for Centennial's blended water supply, as they adapt to actual consumption rather than regenerating on a fixed schedule — saving salt and water during periods of lower hardness.

Many Centennial HOAs permit salt-based softeners, but check your specific covenants. Salt-free conditioners are available as an alternative if your HOA restricts salt discharge.

Frequently Asked Questions