PM2.5 is 6.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 6.5/22 × 0.5 = 0.1 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 55.2 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 6.8 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 6.8/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 54.9 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 6.9 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 6.9/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 54.8 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 8.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 8.5/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 53.2 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 8.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 8.5/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 53.2 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 9.2 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 9.2/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 52.5 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 9.4 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 9.4/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 52.3 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 9.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 9.5/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 52.2 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 9.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 9.5/22 × 0.5 = 0.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 52.2 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 11.9 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 11.9/22 × 0.5 = 0.3 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 49.8 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 13.2 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 13.2/22 × 0.5 = 0.3 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 48.5 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 17.3 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 17.3/22 × 0.5 = 0.4 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 44.4 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 19.8 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 19.8/22 × 0.5 = 0.5 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 41.9 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 22.1 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 22.1/22 × 0.5 = 0.5 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 39.6 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 22.7 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 22.7/22 × 0.5 = 0.5 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 39 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 27.2 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 27.2/22 × 0.5 = 0.6 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 34.5 µg/m³ less fine-particle pollution than Boston right now
Checking road route/New York/Unhealthy for sensitive groups/ PM2.5 54.8 µg/m³
PM2.5 is 54.8 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 54.8/22 × 0.5 = 1.2 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 6.9 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 59.3 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 59.3/22 × 0.5 = 1.3 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
▼ 2.4 µg/m³ less fine-particle pollution than Boston right now
PM2.5 is 64.5 µg/m³ here vs 61.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h out ≈ 64.5/22 × 0.5 = 1.5 here; 61.7/22 × 0.5 = 1.4 at home.A health-impact equivalence, not literal smoking.See how we work it out →
Oof. Twelve hours out here is roughlyPM2.5 here is 61.7 µg/m³.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.12 h outside ≈ 61.7/22 × 0.5 = 1.4 cigarettes.A health-impact equivalence, not literal smoking.See how we work it out →
That is the fine-particle pollution you'd breathe standing outside all day inBoston right now, turned into a number your body already understands.
A health-impact equivalence, not literal smoking: Berkeley Earth puts a full day at 22 µg/m³ of PM2.5 at about one cigarette.How we work this out
Why live rankings?
Smoke plumes are patchy and move with changing winds, terrain and weather. Nearby lakefront, coastal and higher-elevation places can be much clearer than Boston, but no direction is reliably cleaner. That is why this list is recalculated from live PM2.5 readings every hour instead of publishing a fixed escape route. If everything within three hours is smoky, the rankings will say so. Sometimes the honest answer is to stay inside with a filter running.