The Clean Air Act Amendments of 1990 Section 112(r) required the Environmental Protection Agency (EPA) to develop regulations that would prevent the accidental release of hazardous chemicals to the air and mitigate potential impacts to the public and the environment. The rule was finalized in June of 1996 by EPA and can be found in 40 CFR Part 68--Accidental Release Prevention Requirements: Risk Management Programs. This rule has created significant interest within the engineering and industrial communities. Thousands of facilities throughout the country that store hazardous chemicals above designated threshold quantities will be affected. Of particular interest are water and wastewater facilities that store hazardous chlorine gas in quantities greater than 2,500 lbs. Facilities are mandated to assess potential risks to the off-site public and the environment through a hazard assessment, create a multi-step prevention program, and implement a management system to oversee continued program implementation. Additionally, facilities must coordinate an emergency response plan to safely and efficiently mitigate any subsequent accidental release of a hazardous chemical. All subjected facilities must be in full compliance by June 21, 1999. The purpose of this paper is to provide a practical guideline to the large number of water and wastewater utilities seeking to obtain regulatory compliance and evaluate their disinfection alternatives for the next century. This paper will outline the rule requirements and utilize case study results from the City of Coral Springs, Florida Risk Management Program. Includes table, figures.