Local Water Supply and Source of PFAS in NN Area
Public water in NN is supplied by the Fort Defiance-Window Rock-St Michaels NTUA system
This system draws water that meets federal health standards without recorded violations for PFAS under EPA rules as of the 2023-2025 monitoring period.
PFAS compounds originate mainly from industrial and consumer products
In groundwater and surface water, PFAS can enter through release from manufacturing sites, firefighting foams, and persistent residues in the environment affecting many regions including NN.
Interpreting Regional PFAS Data in Context
Sample results show no PFAS above detection thresholds in NN system
Fourteen samples were taken from the public system between July 2024 and August 2025 with no PFAS compounds detected above the reporting levels established by EPA.
Comparing NN data with neighboring counties requires understanding scope
Each public water system record reflects specific monitored supplies, so differences in reported detections may reflect different source waters or sampling efforts rather than a direct comparison of safety or quality.
Steps for Homeowners After Treatment Equipment Failure
Start by checking your household water demand and recent water testing results
Knowing your daily water use helps select appropriate treatment capacity; testing water directly from your tap or well identifies actual PFAS concentrations affecting your household.
Consider laboratory analysis for PFAS to confirm presence and levels
Since regional system data do not provide specific household results, professional lab testing of your water is key to determine whether PFAS removal measures are necessary.
Special Considerations for Different Household Types
Larger households may require treatment solutions capable of higher flow rates
Water demand scales with occupancy, so systems configured for single users may not fully treat water for more residents or heavier use.
Seasonal or second homes might need tailored maintenance or activation plans
Intermittent use can affect treatment system performance; ensuring the system is ready when the home is occupied prevents gaps in water quality protection.
Understanding Public Water System Records vs Private Well Testing
System records reflect average water quality at the distribution entry point
Data are from official monitoring and represent conditions within the public supply network, not the individual household plumbing or private wells.
Private well testing is necessary to identify local groundwater conditions
Well water can vary significantly from system averages; independent testing provides the information needed to address specific household water quality issues.
After measuring your household demand and obtaining test results, consider the Fleck PFAS Forever Chemicals Filter which ships ready to configure for residential PFAS treatment tailored to your water use.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-08-18. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for Fort Defiance-Window Rock-St Michaels NTUA (NN0403000), NN: 140 results across 10 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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