The public water system record for Middlesex Water Company, serving Woodbridge Township in Middlesex County, NJ, shows a 90th percentile lead measurement of 0.00084 mg/L as of mid-2026. This figure represents lead detected within the home plumbing distribution system, not the original source water.
Impact of Source Type and Sampling Depth on Lead Expectations
Surface Water as Primary Source
Middlesex Water Company draws supply from surface water sources, which generally have different lead profiles than groundwater wells. Lead in this system is likely influenced by home plumbing materials rather than the source itself.
Distribution System Sampling
The reported 90th percentile lead level derives from samples taken at customer taps, reflecting potential leaching from pipes and fixtures rather than contamination in the source water.
Evaluating Treatment Capacity for Household Water Use
Matching Treatment to Existing Water Use
Households with established water treatment equipment that struggle to keep up may need to consider equipment rated for higher flow or longer effective capacity to maintain low lead levels during peak use.
System Readiness to Configure
The Autotrol Lead in Water Filter ships ready to configure, supporting adjustments to flow rates suitable for typical residential daily demand without professional services.
Differences Between Public System Records and Private Well Testing
Public System Sampling Reflects Distribution Plumbing
The system record reflects lead levels in water after it leaves the treatment plant and flows through public and private plumbing, which may introduce lead.
Private Well Testing Is Site-Specific
Water testing in an individual household well is necessary to determine local water quality, as it does not reflect conditions in public water systems or neighboring homes.
Interpreting Certified Laboratory Lead Test Results
Understanding 90th Percentile Reporting
The 90th percentile value indicates that 90% of sampled faucets showed lead at or below this concentration; it is not an average or a maximum lead content.
What a Lab Test Reveals for Your Home
A certified lead test from a laboratory provides a clear measurement of lead concentration from specific sampling locations and times, crucial for personalized treatment decisions.
Pathways of Lead into Woodbridge Township Water
Lead Originates in Plumbing Materials
Lead presence commonly results from corrosion of pipes, solder, and fixtures containing lead within the distribution system and household plumbing rather than the surface water source.
Influence of Water Chemistry
The chemical characteristics of water such as pH and mineral content affect how much lead leaches into water from plumbing materials.
In summary, the Middlesex Water Company public system record provides distribution system lead data for Woodbridge Township but does not detail individual home water quality. For personalized assessment, certified laboratory testing of household water is essential. The government source for this information is the EPA SDWIS public water system record NJ1225001.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2026-06-30. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for MIDDLESEX WATER COMPANY (NJ1225001), surface water supply, serving 233376 people: 1 health-based violations of 11 total; lead 90th percentile 0.00084 mg/L
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