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Energy & environment · 20/06/1994Updated: 10/16/2026 · 1 min read

United States Environmental Protection Agency Approves Indiana's 1990 Base Year Ozone Precursor Emission Inventories

The United States Environmental Protection Agency (USEPA) has approved Indiana's 1990 base year ozone precursor emission inventories for certain ozone nonattainment areas as a revision to the Indiana ozone State Implementation Plan (SIP). The approval covers areas such as Evansville, Indianapolis, Louisville, and South Bend/Elkhart.

Original source language: Federal Register — Environmental Protection AgencyOpen original release →

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