Based on EPA UCMR5 monitoring data, EPA SDWIS federal violations records, and EWG Tap Water Database published findings.
This water system benefits from a protected source watershed with limited industrial or agricultural pressure, per available EPA data. Contaminant detections are minimal and fall below both EPA legal limits and EWG health guidelines. Basic filtration for taste and aesthetic improvement is the primary recommendation here.
Water source: Surface water (Little River)
Water utility: City of Maryville Utilities
Not detected in available EPA monitoring data. This is a positive indicator, though PFAS testing coverage is not universal.
The EPA's new maximum contaminant level (MCL) for PFAS is 4 ppt, effective 2026. PFAS compounds have been linked to cancer, thyroid disease, immune disruption, and developmental issues at chronic exposure levels per peer-reviewed research.
The following contaminants have been detected or are associated with elevated risk in this water system, per available EPA and EWG published data:
These detections are drawn from EPA SDWIS federal violations database and EWG Tap Water Database records. EWG health guidelines are stricter than EPA legal limits and reflect long-term exposure risk.
No health-based EPA violations recorded in the past 5 years at this utility. Note: EPA violations reflect legal compliance thresholds, which are less protective than the EWG health guidelines used in HAVEN's scoring model.
A certified pitcher filter (ZeroWater, Clearly Filtered) or under-sink carbon block filter is sufficient for most concerns at this score level. RO filtration provides added peace of mind if PFAS is detected.
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