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State Report

Water & Air Quality in Colorado

Regional composite data for PFAS, lead, and PM2.5 in Colorado. Values are derived from EPA UCMR 5, EWG Tap Water Database, and AirNow annual averages. Check your specific ZIP code below for localized results.

PFAS

2 ppt
50% of EPA 4 ppt limit
Clean

Lead

3.1 ppb
21% of EPA 15 ppb action level
OK

PM2.5

8.2 µg/m³
91% of EPA 9 µg/m³ standard
OK

Colorado Context

Rocky Mountain snowpack source; PM2.5 elevated in Front Range during inversions and wildfire smoke.

Check Your Specific ZIP Code in Colorado

State averages mask wide local variation. Your ZIP code may be significantly cleaner or more contaminated than the state composite — especially near industrial sites, military bases, or older housing stock.

Audit Colorado ZIP 80202 →

Or go to the home page and enter any Colorado ZIP code.

What These Numbers Mean for Colorado Residents

PFAS in Colorado Drinking Water

Colorado's regional PFAS composite is 2 parts per trillion (ppt), which is at or below the EPA's 2024 enforceable limit of 4 ppt for PFOA and PFOS. That said, the EPA limit reflects what's technically achievable — the agency's health goal is zero, and any PFAS exposure carries some risk given their persistence in the body.

Lead in Colorado Tap Water

Lead contamination in Colorado averages 3.1 ppb at the 90th percentile. This is within the EPA's action level but above the zero health goal. Lead pipes in pre-1986 homes remain the primary risk factor — consider an NSF 53-certified filter as a precaution.

PM2.5 Air Quality in Colorado

Colorado's annual average PM2.5 is 8.2 µg/m³. This meets the EPA annual standard (9 µg/m³) but exceeds the stricter WHO guideline of 5 µg/m³. A HEPA air purifier in sleeping areas is recommended, particularly for children and people with respiratory conditions.

Filtration Recommendations for Colorado

  • Lead concern: Any NSF 53-certified carbon block filter removes lead at the tap. An RO system covers both PFAS and lead. Shop Berkey →

Colorado Water & Air Resources

EWG Tap Water Database

Search Colorado utility test results for PFAS and other contaminants.

EPA AirNow

Real-time PM2.5 and AQI data for Colorado cities.

Consumer Confidence Reports

Your Colorado utility's annual water quality disclosure.

Want to go deeper? Read our evidence-based articles on PFAS health effects, water filter comparisons, and PM2.5 air quality. Or audit your specific ZIP code for localized results.