Middlesex Water Invests $96.4M in Infrastructure

The New Jersey utility upgraded aging water mains and plans roughly $506 million in further investment through 2028.

Updated on Nov. 10, 2026 in Utilities

Photograph of an open trench on a residential road exposing new gray water pipe beside a corroded old main, with a yellow excavator at the edge of the frame. — Middlesex Water invested $96.4 million in water and wastewater infrastructure in 2025, replacing about 28,000 feet of aging main, and plans roughly $506 million more through 2028. AI Illustration. Upload story photo >

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Middlesex Water invested $96.4 million in water and wastewater infrastructure during 2025, replacing approximately 28,000 feet of aging water main. The utility's RENEW program systematically replaces aging mains across its system.

Why it matters

Aging water mains and service lines are a long-running infrastructure challenge for New Jersey utilities, and replacing them directly affects water reliability for customers. Middlesex's planned spending reflects continued investment in system upgrades and emerging contaminant treatment.

Middlesex Water invested $96.4 million in water and wastewater infrastructure in 2025 and plans about $506 million more between 2026 and 2028. The utility did not address whether the forecast total will be revised, and the source does not give a comparison to prior-year spending.

The players

Middlesex Water Company

A New Jersey water utility serving customers across the state, which operates the RENEW main replacement program and the Carl J. Olsen water treatment plant in Edison.

The details

Middlesex Water coordinates main replacement work with its lead service line initiative, replacing qualifying customer-owned lead or galvanized steel lines at no direct cost to property owners during broader projects. Estimated homeowner costs for private service line replacement, when not covered, run roughly $3,000 to $5,000.

2025: Middlesex invested $96.4 million in infrastructure and replaced 28,000 feet of aging main.
2026 to 2028: Middlesex plans roughly $506 million in infrastructure investment, including PFAS treatment.

Industry Context

Middlesex's combined main and lead service line work mirrors the lead-line replacement obligations New Jersey has imposed on water utilities under state rules. Its PFAS treatment plan at the Carl J. Olsen plant addresses the emerging contaminant standards now shaping utility capital budgets statewide.

Customers served by Middlesex Water should see ongoing main and service line replacement in their areas over the coming years. Homeowners with qualifying lead or galvanized steel service lines may have them replaced at no direct cost during these projects.

The takeaway

Replacing aging water infrastructure reduces the risk of service disruption and lead exposure over time. Residents can check whether their service line is lead or galvanized steel by contacting their water provider.