Nassau Faces Public Health Crisis: 13,000 Water Lines Contaminated with Lead

A recent report by the Rockefeller Institute of Government has revealed that nearly 13,000 water lines in Nassau County require replacement due to actual or potential lead contamination. This finding is part of a broader federal mandate to inventory and replace water service lines—the connections between street mains and individual properties—that pose health risks. Water suppliers across New York are obligated by federal Environmental Protection Agency (EPA) regulations to complete their inventories and submit replacement plans by November 2027, with the majority having until 2037 to finalize the replacements.

The Rockefeller Institute's research, which aligns with a 2025 Newsday analysis of state data, indicates that as of July, a total of 286,544 water lines statewide are in need of replacement. This includes 12,904 lines specifically in Nassau County and 16 in Suffolk County. The problematic lines encompass not only those made directly of lead but also galvanized pipes—steel pipes coated with zinc—which must also be replaced because they are "downstream" and can re-contaminate water that has passed through lead pipes. On Long Island alone, state records suggest there are between 800,000 and 900,000 total service lines.

Laura Rabinow, director of research at the Rockefeller Institute and a co-author of the report, emphasized the critical importance of a complete statewide accounting. She stated that accurately identifying lead and lead-contaminated pipes is "essential" for effective remediation. Rabinow noted that this initiative marks "the first time we have broadly tried to make sure that we have identified all of these and centralized the identification process," which will provide a crucial baseline for planning necessary investments and statewide strategies for replacement.

The health risks associated with lead exposure are well-documented. Rabinow highlighted that preventing these exposures can avert "potentially lifelong impacts for folks," given that there is no safe level of exposure for young children, who are particularly vulnerable. The World Health Organization (WHO) warns that lead exposure can lead to serious health issues such as kidney disease, damage to the immune system and reproductive organs, anemia, and high blood pressure.

Communities across New York face varying degrees of remediation work. For instance, the Village of Hempstead has 733 lines identified for replacement, while the Jericho Water District has a comparatively smaller task with only six lines needing attention, according to the Rockefeller report. Residents like Jenn Grillo of Jericho expressed concerns about water safety, especially with young children, and desire documentation to ensure drinking water is safe.

Despite the challenges, significant progress has been made in inventory submission. The Rockefeller report noted that 98% of water systems in the state had submitted their inventories by July, a substantial improvement compared to 2025 when 243 systems were missing. Historical use of lead piping, prevalent in American homes since the 19th century before federal and New York state outlawed its use for new installations, contributes to the varying local data, as different water systems were established at different times and records may be incomplete.

Replacing these pipes presents a substantial financial and logistical challenge. James Neri, a spokesperson for the Long Island Water Conference, acknowledged the high costs involved. While the state and federal governments have allocated approximately $975 million for remediation efforts, the Rockefeller Institute estimates that an additional $2.725 billion will be required to replace all lead service lines in New York by the 2037 deadline. Neri also pointed out that while some communities have secured grants, property owners might bear some of the cost, which could range from $4,000 to $5,000 on the lower end. The tight 10-year window for replacement poses further challenges related to the pure volume of work, availability of materials, and securing sufficient funding.