Colorado Water Quality Reports 2026
Is your Colorado tap water safe to drink? Check water quality for 18 cities and find the best water filtration companies near you.
Common Water Quality Concerns in Colorado
Water Quality Reports by City
Select your city to see EPA water data and find local filtration services.
Denver
Pop: 727,211
Colorado Springs
Pop: 478,961
Aurora
Pop: 386,261
Fort Collins
Pop: 169,810
Lakewood
Pop: 155,984
Thornton
Pop: 141,867
Arvada
Pop: 124,402
Westminster
Pop: 116,317
Pueblo
Pop: 111,876
Centennial
Pop: 110,250
Boulder
Pop: 105,485
Greeley
Pop: 108,649
Longmont
Pop: 98,885
Loveland
Pop: 76,378
Broomfield
Pop: 74,112
Castle Rock
Pop: 73,158
Commerce City
Pop: 61,887
Parker
Pop: 58,512
About Colorado Drinking Water
Is Colorado tap water safe? While Colorado water utilities must meet EPA minimum standards, many contaminants are legally allowed at levels that health experts consider concerning. Each city's water quality varies based on source, treatment, and infrastructure age.
How to Find the Best Water Filtration in Colorado
When choosing a water filtration company in Colorado, consider:
- Free water testing — Reputable companies offer professional in-home testing
- Customized solutions — Your system should address your specific contaminants
- Whole-home vs. point-of-use — Whole-home systems protect every tap and shower
- Certification — Look for NSF-certified systems
- Warranty and service — Quality companies stand behind their work
Why Colorado Residents Need Water Filtration
Colorado's water infrastructure faces challenges from aging pipes, agricultural runoff, industrial contamination, and emerging pollutants like PFAS. Even when water leaves the treatment plant safely, it can pick up contaminants traveling through miles of pipes to your home.
A whole-home water filtration system ensures that every tap in your Colorado home delivers clean, safe water — for drinking, cooking, bathing, and more.
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