Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Colorado Water Quality Reports
Water quality scores for 35 cities in Colorado
Longmont
98,885 residents
Steamboat Springs
13,932 residents
Boulder
105,673 residents
Broomfield
74,112 residents
Erie
31,859 residents
Northglenn
38,697 residents
Greeley
108,649 residents
Grand Junction
65,560 residents
Centennial
108,418 residents
Vail
5,305 residents
Fort Collins
169,810 residents
Lakewood
155,984 residents
Brighton
41,886 residents
Colorado Springs
478,961 residents
Montrose
20,291 residents
Commerce City
62,418 residents
Fort Morgan
11,555 residents
Evans
22,825 residents
Littleton
46,729 residents
Pueblo
111,876 residents
Denver
715,522 residents
Englewood
34,840 residents
Thornton
141,867 residents
Aurora
386,261 residents
Fountain
31,983 residents
Loveland
82,329 residents
Westminster
116,317 residents
Castle Rock
73,158 residents
Lafayette
31,962 residents
Golden
21,254 residents
Parker
58,512 residents
Durango
19,399 residents
Arvada
124,402 residents
Wheat Ridge
32,133 residents
Windsor
32,551 residents
About Colorado Water Quality
This state's water quality reflects local geographic conditions, industrial activities, and water infrastructure. Water quality can vary significantly between communities, with some areas enjoying excellent tap water while others face contamination challenges requiring treatment.
Based on our analysis of 35 cities in Colorado, the average water quality score is 76/100. 11 cities have water quality scores below 70, indicating potential concerns that residents should be aware of. The highest-rated city is Windsor with a score of 45/100, while Longmont has the most room for improvement at 96/100.
Water Sources in Colorado
Water sources typically include a combination of surface water (rivers, lakes, reservoirs) and groundwater. The specific sources serving your community depend on local geography and infrastructure. Check your local water utility's Consumer Confidence Report for details about your water source.
Common Water Contaminants in Colorado
These contaminants have been detected in various Colorado water systems
Colorado Water Regulations
State environmental and health agencies oversee drinking water quality in compliance with federal EPA standards. Public water systems are required to test regularly and report results to residents through annual Consumer Confidence Reports.
Health Considerations
Water quality concerns vary by location. Common issues include lead from older plumbing, agricultural runoff in rural areas, and industrial contamination near manufacturing sites. Check your local water quality report and consider testing if you have specific concerns.
Recommendations for Colorado Residents
Review your annual Consumer Confidence Report to understand local water quality. Consider having your water tested if you use a private well or have concerns about your plumbing. Water filters certified to remove specific contaminants can address most common water quality issues.
Frequently Asked Questions About Colorado Water Quality
Is Colorado's tap water safe to drink?
Water quality in Colorado varies by location. Our analysis shows an average score of 76/100 across 35 cities, with 11 cities showing potential concerns. We recommend checking your specific city's water quality report and considering filtration if needed.
What are the main water quality concerns in Colorado?
The most common water quality concerns in Colorado include disinfection byproducts (chlorination), lead (older infrastructure), nitrates (agricultural areas). These contaminants can come from natural sources, industrial activities, or aging infrastructure. Review your city's specific report to see which contaminants affect your area.
Should I use a water filter in Colorado?
Whether you need a water filter depends on your specific location and health concerns. With 11 cities in Colorado showing elevated contaminant levels, residents in those areas may benefit from filtration. Look for filters certified by NSF/ANSI to remove the specific contaminants found in your area.
Where can I find my Colorado water quality report?
Public water systems in Colorado are required to provide annual Consumer Confidence Reports (CCRs) to residents. You can usually find your report on your water utility's website, request it by phone, or access it through the EPA's database. Our city-level reports above summarize key information from these official sources.