Prevention of Significant Deterioration (PSD)

Definition

Prevention of Significant Deterioration (PSD) is a regulatory program established under the Clean Air Act aimed at protecting air quality in regions that are considered to be in attainment of national air quality standards. The PSD program focuses on preventing any significant decline in air quality as new sources of pollution are developed, ensuring that air quality remains healthy for both the environment and public health. This program is critical in balancing economic growth with environmental protection by imposing stringent permit requirements for new industrial facilities and major modifications to existing plants.

5 Must Know Facts For Your Next Test

1. The PSD program was created as part of the Clean Air Act Amendments of 1977 to preserve clean air in areas that are not experiencing pollution problems.
2. New sources of air pollution must obtain a PSD permit before construction, which requires them to demonstrate they will not significantly deteriorate air quality.
3. The PSD program applies not only to new power plants but also to major modifications of existing facilities that could increase emissions.
4. States have the authority to implement their own PSD programs, but they must be at least as stringent as federal regulations set by the EPA.
5. The PSD program promotes the use of Best Available Control Technology (BACT) to minimize emissions and encourages environmentally friendly practices in industry.

Review Questions

• How does the Prevention of Significant Deterioration (PSD) program balance economic growth with environmental protection?
  • The Prevention of Significant Deterioration (PSD) program balances economic growth and environmental protection by requiring new industrial developments to obtain permits that ensure they will not degrade existing air quality. By imposing strict regulations, such as demonstrating the use of Best Available Control Technology (BACT), the program allows for continued industrial growth while safeguarding air quality standards. This framework helps maintain public health and environmental integrity even as new sources of pollution emerge.
• What role do states play in the implementation of the PSD program, and how does this impact local air quality management?
  • States play a significant role in implementing the Prevention of Significant Deterioration (PSD) program by establishing their own regulations and permitting processes that comply with federal guidelines. This state-level authority allows for tailored approaches to local air quality management, enabling states to address specific regional concerns while still adhering to national standards. However, if a state’s PSD program is less stringent than federal requirements, it can lead to increased pollution and negative impacts on local air quality.
• Evaluate the effectiveness of the PSD program in protecting air quality in attainment areas, considering its strengths and potential weaknesses.
  • The effectiveness of the Prevention of Significant Deterioration (PSD) program in protecting air quality in attainment areas can be evaluated by examining both its strengths and potential weaknesses. One strength is its proactive approach to preventing significant declines in air quality by regulating new sources of pollution through strict permitting requirements. Additionally, promoting Best Available Control Technology (BACT) encourages innovation in emissions reduction. However, potential weaknesses include challenges in enforcement, variability in state implementation, and the reliance on technological solutions that may not address all pollutants effectively. Ultimately, ongoing assessment and adaptation of the PSD program are crucial to ensure its long-term success in safeguarding air quality.

Related terms

National Ambient Air Quality Standards (NAAQS): Standards established by the EPA to protect public health and the environment from harmful air pollutants.

Attainment Area: A geographical area that meets or exceeds the National Ambient Air Quality Standards, allowing for economic development while maintaining air quality.

Best Available Control Technology (BACT): The most effective technology and methods that can be employed to reduce emissions from a facility to meet PSD requirements.