Achieving and maintaining air quality in New Hampshire that is protective of public health and our natural environment.
Congress designed the Clean Air Act (CAA) to protect public health and welfare from different types of air pollution caused by a diverse array of pollution sources. The CAA assigns the primary responsibility for air pollution control to state and local governments.
Many of the day-to-day regulatory functions and contact with sources of air pollution in NH occurs at the state level under provisions of the New Hampshire state implementation plan (SIP) and state statutory authority. Initially, state implementation plans were the mechanism by which states set emission limits and allocated pollution control responsibility among sources to meet the limits on ambient concentrations of criteria pollutants.
This was accomplished through a process that involved collecting emission inventory, monitoring ambient pollutant concentrations, modeling emissions to determine reductions needed to attain the national ambient air quality standards (NAAQS) and imposing appropriate emission limits on new and existing industrial sources.
These functions continue today but after the CAA Amendments of 1977 and 1990, the responsibilities broadened to also include implementation of many specific technology-based emission standards, permitting of sources, collection of emission report and fees, coordination of air quality planning with highway and mass transit planning, and prevention of significant deterioration of air quality.
Env-A 1400, Regulated Toxic Air Pollutants Informational Webinar and Draft Rule
On September 8, 2020, the Air Resources Division (ARD) conducted an informational webinar to present the proposed changes to Env-A 1400 Regulated Toxic Air Pollutants. Please refer to both a recording of the webinar and the presentation for more information on the proposed changes to the rule. The formaldehyde ambient air limits have been revised as a result of stakeholder comments. ARD is also proposing to retain the AALs for hydrogen sulfide from the existing Env-A 1400.
ARD presented the revised draft rule to the Air Resources Council in January 2021. In response to comments received during that meeting, the compliance boundary rule, Env-A 1404.07, has been revised and is explained in more detail by the compliance boundary examples. Interested stakeholders and the public will be able to provide comments during the public comment period and at the public hearing (tentatively scheduled for May) once the formal rulemaking begins. All questions or comments about the proposed rule should be directed to Karla McManus at [email protected] or (603) 271- 6854.
Working to Achieve and Maintain Clean Air
Since the first monitoring of air quality in New Hampshire in 1962 to the passage of the New Hampshire Air Quality Act of 1967 and adoption of the first New Hampshire SIP in 1972 to establish ambient air quality standards and a permit system, New Hampshire has been diligently working to achieve and maintain clean air for the public health, welfare and safety of the citizens and environment of the state for future generations. Therefore, some of the regulations that apply to New Hampshire entities existed prior to the CAAA of 1990 or were adopted specifically as a result of state legislative action.
In addition to criteria pollutants, the Clean Air Act Amendments of 1990 completely overhauled the nation’s hazardous air emission program by listing 187 specific substances as hazardous air pollutants and developing Maximum Achievable Control Technology standards. In 1987, the NH Legislature established NH’s own Air Toxic Control Act, which is designed to promote the public health of the state by reducing human exposure to toxic chemicals by regulating releases of regulated toxic air pollutants into the ambient air. While not part of the New Hampshire SIP, the Air Toxic Control Act and related regulation are an integral part of the department’s goal of achieving and maintaining air quality in New Hampshire that is protective of public health.
Congress also drafted the CAA with general authorities that can be used to address pollution problems that emerge over time, such as greenhouse gases that cause climate change. NHDES protects NH’s air quality by regulating industrial sources, implementing a statewide permitting and compliance program, addressing transportation issues through emission reduction strategies, and addressing climate change.