EPA Approves Delaware's Plan to Keep Air Quality Good in the Philadelphia Area
Official: Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment Area
Reading: EPA approval of Delaware's limited maintenance plan extends existing PM2.5 air-quality protections without strengthening or weakening them.
The plan also allows transportation and development projects in the region to proceed without additional air-quality restrictions.
In clear language
The EPA has approved Delaware's plan to maintain clean air quality standards for fine particulate matter (PM2.5) in the New Castle County portion of the Philadelphia-Wilmington area through 2036. This approval means Delaware can continue current air quality protections without needing stricter measures for the next 10 years. The plan also allows transportation and development projects in the region to proceed without additional air-quality restrictions.
How does this affect you?
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Who does this affect?
- Residents of New Castle County, Delaware and nearby parts of Pennsylvania and New Jersey who breathe the air in the Philadelphia-Wilmington region
- State and local governments in Delaware planning transportation projects and development that need EPA air-quality approval
- Businesses and industries operating in the nonattainment area that must comply with existing air-quality rules
What can you do?
- Stay informed about local air quality through DELaware's air-quality monitoring reports and the EPA's AirNow website
- Support transportation choices that reduce vehicle emissions, such as public transit or carpooling
Timeline
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- Effective: 2026-08-03
- 2026-07-02: EPA published the approval
- 2026-08-03: Approval becomes effective
- 2036: End of the second 10-year maintenance period
No New Jersey official has a verified action on this policy yet.
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