Drinking Water - Regulation - Control and Prevention of Waterborne Disease
HB204 establishes a new framework in Maryland law for preventing and controlling waterborne disease, with a particular focus on Legionella bacteria and Legionnaires’ disease. The bill creates a new Part III in the Environment Article requiring public water systems to maintain minimum detectable disinfectant residual levels, conduct regular disinfectant testing, and comply with new monitoring and reporting rules. It also directs the Department of the Environment and the Maryland Department of Health to adopt regulations for nitrification plans, construction-related monitoring, and additional disinfectant or testing requirements aimed at reducing Legionella growth and transmission.
The bill also adds notification and investigation requirements when disruptions occur in a water distribution system or when a case of Legionnaires’ disease is reported. Water suppliers would have to notify affected customers about disruptions that could elevate Legionella risk and file records with the Department, which would maintain a public database of those disruptions. The Maryland Department of Health would be required to investigate reported cases, test identified exposure points, maintain a de-identified public registry, and coordinate with the Department on follow-up testing of public water systems where cases are linked.
HB204 extends beyond public water systems to certain buildings. Owners or operators of covered buildings, as defined by ASHRAE Standard 188-2018, would have to implement water management programs by October 1, 2027 to minimize Legionella growth and make those programs available to inspectors. The bill also requires a public awareness campaign and targeted consumer education program focused on vulnerable populations, water temperature, household water systems, and ways to reduce exposure to Legionella.
In terms of enforcement, the bill expands existing penalty provisions so that failure to comply with the new Part III requirements becomes a violation subject to civil penalties, with penalty amounts scaled by the size of the water supplier. Most penalties would continue to go to the Maryland Clean Water Fund, but penalties collected for violations of the new Part III would instead be directed to a special fund in the Maryland Department of Health for the purposes set out in the bill. The act would take effect October 1, 2026, with several regulatory and program deadlines extending into 2027.
Because there are no committee transcripts or recorded votes provided, the overall sentiment and contention cannot be measured from legislative debate in the available materials. Based on the bill text alone, the measure appears to be a public health and infrastructure safety proposal, but it also imposes new operational, reporting, testing, and compliance obligations on water suppliers and building owners, which are the most likely sources of concern.
HB204 would amend the Environment Article by adding a new Part III governing control and prevention of waterborne disease, while also expanding enforcement and penalty provisions for public water systems that fail to comply. It would impose new duties on the Department of the Environment and the Maryland Department of Health to regulate disinfectant residuals, investigate water disruptions and Legionnaires’ disease cases, publish public information, and oversee compliance. The bill would also create new obligations for covered building owners and operators to adopt Legionella-focused water management programs, and it would redirect certain penalty revenues to a special Maryland Department of Health fund rather than the Clean Water Fund.
No committee discussion or vote history was provided, so there is no recorded legislative sentiment to summarize from the available materials. On its face, the bill is framed as a public health protection measure intended to reduce Legionella exposure and improve transparency, suggesting a policy goal that is likely to be viewed favorably by health and consumer advocates. At the same time, the bill’s detailed compliance, testing, reporting, and building-management requirements suggest that water utilities and affected property owners may view it as a significant regulatory expansion.
The main points of potential contention are the scope and cost of compliance for public water suppliers and covered buildings, especially the new minimum disinfectant residual requirements, testing mandates, notice obligations, and water management program requirements. Water systems may also object to the bill’s investigation and reporting framework, including public databases and the possibility of third-party investigations. Building owners and operators could raise concerns about the ASHRAE-based water management program mandate and inspection access. Another possible point of debate is the bill’s penalty structure and the redirection of certain penalties to a special fund in the Department of Health, which changes how enforcement revenues are used.