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The National Association of Clean Air Agencies' Clean Air and Climate Protection Software (CACPS), is a Windows-based, user-friendly software tool that will significantly expand the capabilities of states and localities to analyze the benefits of various air pollution control scenarios and select and implement those that not only address traditional air pollutants, such as ozone precursors like nitrogen oxides and volatile organic compounds, carbon monoxide, sulfur oxides and particulate matter, but also greenhouse gases (GHGs), which cause global warming.

NTE Model Rule

NACAA's Multi-State Clean Diesel Initiative facilitates the states' efforts to exercise their authority under Section 177 of the Clean Air Act to opt in to California's not-to-exceed requirements for new onroad heavy-duty diesel engines. NACAA (formerly STAPPA and ALAPCO) developed a model rule as well as some guidance for states in adopting such a rule. Under this very successful Initiative, 13 states across the nation opted in to California’s requirements, resulting in a de facto national standard.

NSR Menu

NACAA (formerly STAPPA and ALAPCO) developed an NSR Menu of Options they can consult during rule development in response to EPA's recent revisions. For each of the main elements of the federal rule, NACAA provides, in regulatory language, a menu of alternative approaches. The NSR Menu includes multiple options for many of the revised program elements, presenting a range of solutions from which permitting agencies may design the most effective program for their particular concerns.

HDDE Model Rule

In early 2004, amidst growing concerns over potential efforts to weaken or delay EPA’s Federal 2007 Rule to reduce emissions from heavy-duty diesel trucks, NACAA (formerly STAPPA and ALAPCO) launched a cooperative multi-state initiative to facilitate states' use of their authority under the Clean Air Act to pursue adoption of California’s 2007 highway diesel standards, which are identical to the federal standards. Although some states had already adopted California’s 2007 engine standards as part of a previous NACAA multi-state clean diesel effort, to assist those that had not, NACAA developed a model rule for adopting the California standards.

Mercury Model Rule

NACAA (formerly STAPPA and ALAPCO) developed a model rule entitled, Mercury from Power Plants: A Model Rule for States and Localities in response to concern that EPA's Clean Air Mercury Rule was inconsistent with the requirements of the Clean Air Act and would not result in adequate reductions in emissions of mercury from coal-fired power plants to protect public health. The NACAA model rule provides state and local governments with the tools needed to obtain reductions in mercury emissions necessary to meet the requirements of the Clean Air Act.

Boiler Model Permit Guidance

This Permit Guidance is intended to provide state and local air pollution control agencies with important tools for regulating hazardous air pollution from the approximately 3,000 industrial, commercial and institutional boilers and process heaters (ICI Boilers), located at refineries, paper mills, manufacturing plants and other facilities in every state in the country. EPA’s Maximum Achievable Control Technology (MACT) rule for ICI Boilers was struck down by the court in June 2007. Pursuant to Section 112(j) of the Clean Air Act (the “MACT hammer”), because there is not a federal rule in place regulating the source category, state and local agencies are required to set the limits for the affected facilities on a case-by-case basis. These limits must be equivalent to those that would have applied to the source had EPA promulgated a MACT standard consistent with the Act. Because of the potentially significant workload associated with developing MACT limits on a case-by-case basis for the large number of affected sources, and the short deadlines imposed by the CAA for state and local actions, NACAA decided to develop this Permit Guidance. The association collected and analyzed extensive emissions data relating to ICI Boilers and developed a set of recommendations for MACT. Additionally, NACAA reviewed the technologies and included information about technologies and costs in the document.

STAPPA