Interpreting 'Detected,' 'Median,' and 'Range' in Area Water Sampling
Detected means presence in all sampled wells
The U.S. Geological Survey groundwater sampling in Androscoggin County’s bedrock aquifer found hardness was detected in all three wells sampled between August and October 2011. Detection here indicates instruments measured hardness constituents—not individual water conditions.
Median shows the middle value in the sample set
A median hardness of 64.7 mg/L marks the midpoint among the three measurements, with two wells below and one above this number, helping to summarize typical conditions in the local bedrock aquifer.
Range displays minimum and maximum readings
Hardness varied from 54.5 to 89.3 mg/L across the sampled wells. This spread helps understand variability but does not define any individual well’s exact hardness.
Understanding the Measured Hardness Against Federal Standards
No federal safety threshold was exceeded in these bedrock aquifer samples
None of the sampled wells in the area showed hardness levels above any federal limit. Such thresholds focus on health-based concerns and hardness is primarily aesthetic, influencing taste, scaling, and appliance wear rather than safety.
Presence of hardness is common and not a violation
Hardness detection is typical in bedrock aquifers of this region. Its measurement signals calcium and magnesium presence, not a breach of water quality rules.
Preparing for Treatment Advice: What to Know About Your Own Water
Test your own water to confirm personal hardness levels
Area-wide sampling cannot substitute for a test of your home’s water supply. Well depth, geological variation, and plumbing design all influence hardness locally.
Record your household water usage and peak demand
Large homes have higher daily water needs. Documenting this helps in selecting the right treatment system capacity.
Note any observed effects like scaling or reduced appliance efficiency
These signs may indicate hardness impact and guide treatment decisions.
Distinguishing Secondary Aesthetic Standards from Health Limits
Aesthetic standards guide taste and scale control, not health safety
Hardness relates to total calcium and magnesium levels that affect water feel and appliance life. Regulatory limits here manage appearance, staining, and corrosion potential but do not indicate health risk.
Hardness exceeding secondary standards is not a violation
Hardness above aesthetic thresholds may warrant treatment but does not mean the water is unsafe to drink.
First Fixtures and Appliances Affected by Hard Water
Water heaters and boilers often show early scaling
Heat-related appliances concentrate hardness minerals, leading to deposits that reduce energy efficiency.
Faucets and showerheads may develop mineral buildup
Visible scaling can reduce flow and cause clogs in fixtures frequently exposed to hard water.
Dishwashers and washing machines may experience wear and spotting
Hard water affects cleaning efficiency and can shorten appliance lifespan.
What You Should Not Conclude from Area Sampling Data
Area sample results do not pinpoint the exact hardness in your well or tap water. They do not imply water safety issues or dictate specific treatment needs for your household. Confirming your water quality with a lab test and matching treatment capacity to your home’s demand are essential next steps. The Fleck Hard Water — Large Home System ships ready to configure for handling hardness from bedrock aquifers and is designed to accommodate the needs of larger households like yours.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2011-10-13. 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 Hardness, Ca, Mg in the BEDROCK aquifer (Androscoggin County): 3 results from 3 wells, median 64.7 mg/L, range 54.5-89.3 mg/L; none above any federal threshold