The U.S. Geological Survey has sampled groundwater in New London County's aquifer 112DFSF, finding pH levels ranging from 5.6 to 6.3 standard units across 11 results since 2010. These values fall below the EPA secondary aesthetic range of 6.5 to 8.5, indicating naturally acidic water is common in the area. This record reflects typical conditions in wells of about 23 feet depth but does not define any individual household's water.
How Certified Lab Tests Report pH and Hardness
A certified laboratory test measures pH as a numeric value indicating how acidic or basic water is, with lower values denoting acidity. The test will also report hardness, usually in grains per gallon or milligrams per liter as calcium carbonate. Reading these results requires noting the exact numbers and comparing them to recognized ranges to assess water quality for household use. While pH and hardness are commonly included in residential water test panels, each home's water requires its own test to confirm conditions.
Interpreting pH Ranges and Federal Standards
The EPA secondary standard for pH focuses on aesthetic and corrosivity factors, ranging from 6.5 to 8.5. In New London County, all sampled groundwater pH results are below this range, reflecting mildly acidic conditions, but this is not a health violation. Lower pH water can contribute to pipe corrosion and etching, affecting fixtures and water taste. Hardness measurements show how much calcium and magnesium are present, which combined with acidity may require specific treatment approaches to prevent staining or scaling.
Evaluating Treatment Capacity for Household Demand
When selecting treatment equipment, it is important to match the system’s capacity to the household’s daily water use. For example, a system with a 32,000-grain capacity can remove a substantial amount of hardness before regeneration is needed. Estimating your average daily water usage helps determine the appropriate size, ensuring effective conditioning without excessive maintenance or salt use.
Considerations for Large, Second, or Seasonal Homes
Larger households or homes occupied seasonally may have different water usage patterns affecting treatment needs. Extended periods of vacancy can lead to sediment buildup or bacterial growth unrelated to acidity or hardness. Systems sized for typical daily use might require adjustments to handle peaks or inactivity periods. It is important to factor in occupancy cycles when choosing a treatment solution.
Comparing New London County to Neighboring Regions
Water quality records vary across counties and aquifers. Neighboring areas might exhibit different pH ranges or hardness levels depending on geology and water sources. Comparing these records helps highlight regional trends but should not substitute for individual water testing. Variations in depth, well construction, and local conditions affect each property's water uniquely.
Differences Between Public System Records and Private Well Testing
Public water system reports document treated water quality reaching consumers and must meet health-based standards, typically showing no violations for pH or hardness. In contrast, private wells reflect untreated groundwater, often with local acidic or hard water conditions sampled by the USGS. Testing of private wells provides specific data critical for choosing appropriate water treatment equipment tailored to onsite conditions.
The Fleck Acidic Water + Hard Water (Well) System ships ready to configure and offers a documented 32,000-grain capacity ideal for residential demand in New London County households experiencing acidic and hard water. Matching system capacity to your measured daily usage ensures effective treatment for your home’s water quality challenges.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-11-21. 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 pH in the 112DFSF aquifer (New London County): 11 results from 1 wells, median 6.1 standard units, range 5.6-6.3 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 11 of 11 sampled results fell below 6.5
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