1. Seasonal and Multi-Year Variation in Regional Water Quality Data
The sampling period was from August to October 2011
The U.S. Geological Survey collected iron data from six separate wells in the York County bedrock aquifer over a two-month window in late summer and early fall. This short timeframe means seasonal changes outside these months are not reflected in this record and could influence water taste at other times.
Range of iron concentrations shows natural variability
Measurements ranged widely from 3.9 to 2180.0 micrograms per liter, demonstrating variability in well conditions and groundwater chemistry in the region.
2. Ruling Out Causes: From Cheap Checks to Laboratory Testing
Start with equipment functionality
Since existing equipment has failed, confirm whether the issue persists without treatment or after basic maintenance like filter cartridge replacement.
Conduct a sensory check
Confirm that the metallic taste is constant and not due to rinsing, plumbing changes, or seasonal water variations.
Obtain a certified laboratory water test
Local natural groundwater conditions vary; only individual water analysis can pinpoint your home's specific iron levels contributing to metallic taste.
3. Influence of Sample Depth, Well Depth, and Source Type
Sampled wells were deep
The six wells sampled in the area ranged from 104 to 365 feet deep, accessing deep bedrock groundwater. Shallow wells or surface water sources may have different iron characteristics affecting taste.
Source type affects iron presence
Aquifer bedrock sources often contain iron naturally, which may dissolve into the water under certain chemical conditions, impacting taste.
4. Understanding the Scope of Regional Data and Sample Size
Limited number of wells sampled
Only six wells were tested, providing initial insight but not comprehensive coverage. Variations in other local wells may exist.
Median value represents a midpoint
The median iron concentration was 26.7 micrograms per liter, meaning half the samples had less and half had more, illustrating central tendency but not extremes.
5. How Iron Enters Groundwater and Affects Distribution
Natural iron presence in bedrock aquifers
Iron is a common element in bedrock and can dissolve into groundwater through natural geochemical processes.
Iron impact on water taste
Even iron levels below regulatory thresholds can impart a metallic taste for some users, distinct from safety concerns.
6. A Homeowner’s Approach to Reading Regional Data
Interpreting the range
The range from 3.9 to 2180.0 micrograms per liter reflects geological differences and well construction variations, not a uniform condition across York County.
Use median as a guide, not certainty
The 26.7 micrograms per liter median suggests moderate presence regionally but does not predict your household water’s exact iron level.
In summary, metallic taste can arise from natural iron in York County's bedrock wells, with seasonal and geological factors influencing intensity. Testing your household water ensures an accurate understanding before choosing treatment.
The C-Series Metallic-Tasting Water Filter ships ready to configure and is designed to address metallic taste once actual water quality is established by testing.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2011-10-25. 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 Iron in the BEDROCK aquifer (York County): 6 results from 6 wells, median 26.7 ug/L, range 3.9-2180.0 ug/L; none above any federal threshold