Long Island’s Water Infrastructure Cybersecurity: Protecting Smart Water Systems from Digital Threats and Ensuring Safe Municipal Connections

Long Island’s Digital Defense: How Smart Water Systems Are Fighting Back Against Cyber Threats While Keeping Your Taps Flowing Safely

In an era where your refrigerator can send text messages and your doorbell streams video to your phone, it should come as no surprise that Long Island’s water infrastructure has gone digital too. But with this technological evolution comes a new challenge that keeps municipal engineers awake at night: cybersecurity threats targeting the very systems that deliver clean water to millions of residents across Nassau and Suffolk Counties.

The Digital Transformation of Water Infrastructure

Long Island’s water systems have embraced smart technology to improve efficiency, monitor quality, and respond faster to problems. These digital systems use internet-connected sensors, automated controls, and cloud-based monitoring to manage everything from water pressure to chemical treatment levels. While this technology has revolutionized water management, it has also created new vulnerabilities that cybercriminals are eager to exploit.

Water infrastructure is essential to public health, safety, economic stability and national security, making it an attractive target for cyber attacks. As systems increasingly rely on digital and internet-connected technologies, the need for cybersecurity safeguards continues to grow.

New York State’s Groundbreaking Response

Recognizing the critical nature of this threat, New York State has developed nation-leading cybersecurity regulations for water and wastewater systems alongside a new cyber grant program and technical assistance to bolster the security and resilience of water and wastewater systems. These regulations, which took effect in March 2026, represent the first comprehensive cybersecurity standards for water systems in the United States.

The new regulations include several key requirements:

  • Mandatory cybersecurity training for certified operators
  • Cybersecurity incident reporting requirements to ensure timely disclosure of breaches
  • All SPDES permittees must report cybersecurity incidents to their Regional Water Engineer as soon as possible, but no later than 24 hours from the time the permittee becomes aware of the cybersecurity incident. In addition, SPDES permittees must submit a second report within 30 days
  • Annual cybersecurity vulnerability assessments, updated within 30 days of any major infrastructure change

The Growing Threat Landscape

The timing of these regulations couldn’t be more critical. A group of 10 information sharing groups, including the Water Information Sharing and Analysis Center, issued a joint advisory warning of a “highly volatile” threat environment that includes the possibility of “increased cyberattacks from Iranian state-sponsored actors, hacktivists, and cybercriminal groups aligned with Iran”.

Water treatment facilities have become prime targets for cyber-attacks due to their critical role in public health and infrastructure. Bad actors, including foreign adversaries, understand the impact of disrupting these systems, which provide essential services to millions of people and industries.

The potential consequences of a successful cyberattack are severe. A successful attack could lead to contaminated water, system shutdowns, and widespread panic.

Long Island’s Unique Vulnerabilities

Long Island faces particular challenges when it comes to water infrastructure security. Long Island gets its drinking water from a single source underground aquifer. Groundwater filtrates into the aquifer, often carrying pollutants that exceed EPA standards. This sole-source dependence makes the region’s water systems especially critical infrastructure that cannot afford disruption.

Additionally, it’s estimated 360,000 homes and 11,800 commercial properties in Suffolk County rely on conventional cesspools and septic systems, creating a complex network of water and wastewater infrastructure that requires comprehensive protection.

Financial Support and Implementation

To help water utilities comply with these new cybersecurity requirements, New York State is launching the new $2.5 million Strengthening Essential Cybersecurity for Utilities and Resiliency Enhancements (SECURE) grant program. Utilities can apply for up to USD 50,000 to conduct cybersecurity assessments and up to USD 100,000 to fund subsequent upgrades.

EFC provides grant funding and no-cost technical assistance to help local governments and eligible entities strengthen the cybersecurity of their drinking water and wastewater systems. EFC’s Community Assistance Teams are available to provide no-cost guidance and tools to help water and wastewater systems implement cybersecurity best practices.

What This Means for Consumers

For Long Island residents and businesses, these cybersecurity improvements translate to more reliable and secure water services. The enhanced monitoring and protection systems help ensure that water quality remains consistent and that service interruptions due to cyber incidents are minimized.

However, consumers also play a role in supporting infrastructure security. When property owners need sewer and water main services, choosing experienced, licensed contractors who understand modern security requirements is essential. Long Island Sewer & Water Main has been serving Nassau and Suffolk County residents for nearly 40 years, providing comprehensive sewer and water main services with the expertise needed to work safely around critical infrastructure systems.

The Road Ahead

The implementation of these cybersecurity measures represents just the beginning of Long Island’s digital defense strategy. Utilities will have a transition period to comply with the new rules, with full implementation required by 2027, while certain reporting and training obligations take effect immediately.

By pairing nation-leading standards with the SECURE grant program, New York is providing the water sectors with the intelligence-driven framework and the muscle they need to preemptively harden their most vital systems against sophisticated global adversaries. Following the successful implementation of new standards for financial and healthcare sectors, this represents continuing the steady, sector-by-sector plan to fortify New York’s most critical infrastructure.

As Long Island continues to modernize its water infrastructure while defending against digital threats, residents can have confidence that their water systems are becoming more secure, more resilient, and better prepared to serve the community for generations to come. The combination of advanced technology, comprehensive regulations, and experienced local service providers creates a robust defense network that protects one of our most essential resources: clean, safe water.