The EPA’s public water system record for Boston’s water supply, serving Suffolk County, shows a 90th percentile lead level of 0.0252 mg/L based on sampling completed on June 30, 2026. This measurement reflects the distribution system and plumbing materials, not the raw source water. With one health-based violation recorded in this system’s history, Boston’s municipal water record provides context but cannot specify any individual household’s exposure.
How Water Changes at the Tap When Using a Lead-Specific Filtration System
The C-Series Lead in Water Filter is designed to reduce lead concentrations from the tap by targeting lead ions after municipal treatment and distribution. Unlike the untreated water supplied by the system, water that flows through this filter experiences a significant reduction in lead content as it passes through. This change means that household water filtered by the C-Series System is less likely to contain lead originating from plumbing or pipe corrosion, improving water suitability for drinking and cooking. The system ships ready to configure and can be integrated by the resident into their home water line without delay.
Sample Depth, Source Type, and What to Expect in Your Household Water
Boston’s water comes from surface water sources and travels through aged urban infrastructure to reach homes. Because sample testing reflects the distribution system as a whole, variations occur based on plumbing age, pipe material, and internal corrosion control. The sample’s 90th percentile is a statistical measure representing levels found in a majority of tested homes but does not define individual results. A household using deeper wells or alternative water sources would have a different profile. Therefore, a lab test of your home’s tap water is necessary to establish your water’s lead level personally.
Why Secondary Aesthetic Standards for Lead Differ From Federal Health-Based Limits in Suffolk County
Aesthetic secondary standards focus on taste, appearance, and staining, which differ from health-based limits set by the EPA. Lead does not have a secondary standard because its effects relate to health rather than aesthetics. The EPA’s health-based limit guides municipal treatment and monitoring for lead in Boston’s system. Exceeding an aesthetic threshold elsewhere would not indicate a direct health risk, whereas Boston’s recorded health-based violation for lead highlights a regulatory finding at some point in the system, not a permanent condition or individual household experience.
The Order of Actions to Clarify Lead Concerns: From Simple Checks to Detailed Testing
- Begin by checking the age and material of your home’s plumbing, as lead often originates from pipes, solder, or fixtures.
- Collect a first-draw sample of tap water and have it analyzed by a certified laboratory to determine your household’s lead level precisely.
- Compare your results with local system data to understand how your water aligns with the 90th percentile measure in Boston’s public water system.
- If lead is present at concerning levels, use the C-Series Lead in Water Filter to reduce potential exposure effectively.
Comparing Suffolk County’s Lead Data With Neighboring Counties Without Overinterpretation
Lead levels and water source types vary across counties. While Suffolk County’s 90th percentile lead value is 0.0252 mg/L, neighboring counties may report different figures due to distinct infrastructure and sources. Comparing these data sets offers context but does not define your home’s water condition. Each county’s water system faces unique challenges, and local sampling represents those specific scenarios rather than suggesting universal conditions.
In summary, Boston’s public water system record serves as a guide but not a definitive account of any home’s lead exposure. Confirming your household’s water quality through testing and considering filtration options like the C-Series Lead in Water Filter are important steps to ensuring safe drinking water.
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 BOSTON WATER AND SEWER COMMISSION (MWRA) (MA3035000), surface water supply, serving 675647 people: 1 health-based violations of 1 total; lead 90th percentile 0.0252 mg/L