Monmouth County, New Jersey: drinking water report. Monmouth County sits along the New Jersey Shore, home to about 640,000 residents.
Monmouth County sits along the New Jersey Shore, home to about 640,000 residents. Water comes from a mix of groundwater and surface water, with New Jersey American Water serving the largest share of customers. The county's aquifers – primarily the Kirkwood-Cohansey and deeper formations – are the backbone of the supply, supplemented by the Swimming River Reservoir and Manasquan Reservoir for surface water.
New Jersey has adopted some of the strictest PFAS standards in the nation: 14 ppt for PFOA, 13 ppt for PFOS, and 13 ppt for PFNA. These limits have forced aggressive testing and treatment across Monmouth County's water systems. UCMR5 data shows PFAS detections in over a dozen county systems, with some exceeding state MCLs.
According to the New Jersey Department of Environmental Protection's 2024 compliance data, five Monmouth County water systems installed or upgraded PFAS treatment facilities to meet state standards. The former Fort Monmouth military installation, which closed in 2011, is a documented PFAS source with ongoing remediation.
New Jersey's strict standards mean your utility is likely already treating for PFAS if detections are significant. But household-level filtration adds another layer of protection.
Check your water to see data for your specific provider. Our water filter guide covers which filters complement utility-level treatment. Pull your detailed report, and visit our New Jersey page for statewide data.