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Środowisko i energia · 11/03/1994

EPA Approves Montana's Clean Air Act Implementation Plan for PM10

The US Environmental Protection Agency (EPA) has approved Montana's State Implementation Plan (SIP) to achieve national ambient air quality standards for particulate matter with an aerodynamic diameter less than or equal to 10 micrometers (PM10) in the Butte area.

Source: Federal Register — Environmental Protection AgencyOpen original release →