Water & Air Quality in Montana
Regional composite data for PFAS, lead, and PM2.5 in Montana. 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
Lead
PM2.5
Montana Context
Pristine source water; wildfire smoke is the dominant seasonal air risk.
Check Your Specific ZIP Code in Montana
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 Montana ZIP 59601 →Or go to the home page and enter any Montana ZIP code.
What These Numbers Mean for Montana Residents
PFAS in Montana Drinking Water
Montana's regional PFAS composite is 1.4 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 Montana Tap Water
Lead contamination in Montana averages 2.8 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 Montana
Montana's annual average PM2.5 is 7 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 Montana
Montana Water & Air Resources
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.