42 USC § 7430 - Emission factors

---
identifier: "/us/usc/t42/s7430"
source: "usc"
legal_status: "official_prima_facie"
title: "42 USC § 7430 - Emission factors"
title_number: 42
title_name: "THE PUBLIC HEALTH AND WELFARE"
section_number: "7430"
section_name: "Emission factors"
chapter_number: 85
chapter_name: "AIR POLLUTION PREVENTION AND CONTROL"
subchapter_number: "I"
subchapter_name: "PROGRAMS AND ACTIVITIES"
part_number: "A"
part_name: "Air Quality and Emission Limitations"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(July 14, 1955, ch. 360, title I, § 130, as added Pub. L. 101–549, title VIII, § 804, Nov. 15, 1990, 104 Stat. 2689.)"
---


# § 7430. Emission factors

November 15, 1990November 15, 1990

Within 6 months after , and at least every 3 years thereafter, the Administrator shall review and, if necessary, revise, the methods (“emission factors”) used for purposes of this chapter to estimate the quantity of emissions of carbon monoxide, volatile organic compounds, and oxides of nitrogen from sources of such air pollutants (including area sources and mobile sources). In addition, the Administrator shall establish emission factors for sources for which no such methods have previously been established by the Administrator. The Administrator shall permit any person to demonstrate improved emissions estimating techniques, and following approval of such techniques, the Administrator shall authorize the use of such techniques. Any such technique may be approved only after appropriate public participation. Until the Administrator has completed the revision required by this section, nothing in this section shall be construed to affect the validity of emission factors established by the Administrator before .

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**Source Credit**: (July 14, 1955, ch. 360, title I, § 130, as added Pub. L. 101–549, title VIII, § 804, Nov. 15, 1990, 104 Stat. 2689.)