U.S. Geological Survey sampling in Kitsap County’s aquifer S100PGTSND found fluoride in groundwater wells with a median concentration of 0.06 mg/L and a range from 0.04 to 0.07 mg/L, all well below federal thresholds. These measurements reflect area aquifer conditions from three separate wells sampled between November 14 and 28, 2016, at depths between 85 and 300 feet.
How Treated Water Differs at the Tap with Fluoride Filtration
Reduction of Fluoride Concentration
With a C-Series Fluoride Filter in place, fluoride levels in your tap water can be lowered from the naturally occurring background concentrations typically found in Kitsap County aquifers.
Maintaining Overall Water Quality
The filtration system targets fluoride specifically without adversely affecting other common water qualities such as mineral balance or pH.
Consistent Fluoride Removal Across Usage
The system is designed to manage typical household water demands, ensuring treated water remains within a targeted fluoride level as measured at the tap.
A Worked Example: Reading Kitsap County’s Fluoride Data as a Homeowner
Median Value Indicates Central Tendency
The median fluoride concentration of 0.06 mg/L means half of the sampled wells had fluoride levels above this value and half below, reflecting typical local groundwater conditions.
Range Shows Natural Variation in Aquifer Samples
The observed range from 0.04 to 0.07 mg/L demonstrates local variability but remains well beneath any federal fluoride limit.
Sample Depths Suggest Consistency Across Well Types
Measured fluoride levels appeared consistent across wells ranging from 85 to 300 feet deep, indicating similar fluoride distribution in the aquifer zone sampled.
Why Aesthetic Secondary Standards Differ from Health-Based Limits for Fluoride
Secondary Standards Address Taste and Appearance
Secondary standards for fluoride focus on aesthetic effects such as taste alterations or discoloration rather than health risk.
Health-Based Limits Set Higher Thresholds
Federal health-based fluoride standards establish maximum allowable concentrations to protect against potential health issues, and area data are well below these limits.
Detection Does Not Equal Safety Concern
Detecting fluoride in water, especially below health-based limits, does not indicate any health violation or unsafe condition.
Which Fixtures, Appliances, or Processes Are Affected First and Why
Drinking and Cooking Faucets
Fixtures used for drinking and cooking experience the most direct impact from fluoride levels since they deliver water for ingestion.
Humidifiers and Aquariums
Water-using appliances sensitive to mineral content, such as humidifiers and aquariums, can show effects from fluoride concentration changes first.
Ice Makers and Coffee Machines
Ice makers and coffee machines may accumulate mineral deposits over time if fluoride concentrations are elevated, potentially affecting operation.
What Happens When Fluoride Is Left Untreated for Years
Minimal Impact at Low Concentrations
Given the low fluoride levels typical of the Kitsap County aquifer, long-term untreated water generally shows negligible issues related to fluoride.
Potential for Slight Taste or Odor Changes
At higher fluoride concentrations (above the area range but still within limits), some individuals might notice subtle changes in taste.
Possible Mineral Deposits in Plumbing Over Time
Extended exposure to elevated fluoride, although uncommon here, could contribute to mineral scale buildup on fixtures and appliances.
To determine the specific fluoride concentration of your household water, a certified laboratory test on your own well or water source is necessary. Based on the measurement you obtain, the C-Series Fluoride Filter ships ready to configure and can effectively reduce fluoride to improve water quality according to your needs.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-11-28. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.
On record: U.S. Geological Survey sampling of Fluoride in the S100PGTSND aquifer (Kitsap County): 3 results from 3 wells, median 0.06 mg/L, range 0.04-0.07 mg/L; none above any federal threshold