Parker Water Hardness & Quality Report (2026)

Parker, Colorado, in Douglas County south of Denver — one of the fastest-growing communities in Colorado, a major Douglas County Front Range suburb known as an equestrian community, home of Pace Center (a regional arts and entertainment complex), and a high-income suburban community in the booming Denver south metro corridor — draws its municipal water supply from Denver Water system and the Parker Water and Sanitation District (PWSD). Water hardness in Parker measures 74.5 mg/L — classified as moderately soft.

Parker's moderate softness — much softer than many Denver Metro Front Range communities — reflects Parker's supply from Denver Water's mountain watershed and the PWSD's modern infrastructure. Denver Water draws from the South Platte River and Blue River mountain reservoirs — primarily Rocky Mountain granite snowmelt watersheds (the Front Range Boulder Creek–Clear Creek and South Platte Mountain Park granite terrain — calcium-poor). Parker's master-planned suburban infrastructure is almost entirely modern (Parker grew from under 5,000 residents in 1990 to over 60,000 today), with new PVC and ductile iron mains that accumulate minimal mineral buildup, producing the moderate 74.5 mg/L — representative of the soft Denver Water mountain supply in a modern distribution system.

With hardness at 74.5 mg/L, Parker residents enjoy moderately soft water for a Colorado Front Range community. Parker Water and Sanitation District consistently delivers water meeting all Colorado CDPHE and EPA Safe Drinking Water Act requirements.