The U.S. Geological Survey collected groundwater samples from the FIPS 160 area aquifer 112DFSF in Connecticut between 2011 and 2017. Sulfide was detected in all four samples taken from three wells at depths between 13 and 273 feet, with a median value of 0.0165 mg/L and a range from 0.0 to 0.1 mg/L. None of these levels exceeded any federal thresholds.
How Is a Sulfur Smell Different From Other Water Odors?
A sulfur smell, often described as 'rotten egg,' typically originates from dissolved sulfide compounds in water, which differ from odors caused by iron or organic material decomposition. Unlike iron, sulfides do not cause reddish staining and may not affect taste similarly. Clarity about the source is key because treatment depends on addressing sulfides specifically.
How Does the Autotrol System Address Sulfur Smell?
The Autotrol Rotten-Egg Sulfur Smell Filter works by oxidizing and removing dissolved sulfide compounds that cause the characteristic odor. The system uses a filtration media designed to neutralize sulfides, preventing the development of the unpleasant smell in household water. This direct approach targets the constituent responsible rather than masking odors.
How Do Sulfides Enter Groundwater in FIPS 160, CT?
Sulfides in this aquifer commonly arise from natural geochemical processes where organic matter decays without oxygen, releasing sulfide ions. The local geology and anaerobic conditions in groundwater contribute to these concentrations. Understanding this helps explain why sulfur smell may occur even in deep wells within the 13 to 273 feet range sampled.
What Do Terms Like 'Detected,' 'Median,' and 'Range' Mean in These Samples?
- Detected: The instruments identified sulfide presence in all samples, meaning values were measured above the method detection limit.
- Median: The middle value of all reported concentrations was 0.0165 mg/L, indicating typical sulfide levels in the area.
- Range: Values varied from 0.0 to 0.1 mg/L across wells and dates, showing some fluctuation but no federal limit exceeded.
It’s important to note that these figures reflect results from area sampling, not your individual household water—which requires its own testing to confirm actual sulfide levels.
How Does Household Size or Seasonal Use Affect Treatment Choice?
Larger households or seasonal properties might experience varied water usage patterns, which influence how effectively treatment systems handle sulfur compounds. For higher volume use, systems like the Autotrol filter must be sized appropriately to maintain odor control without frequent maintenance. Seasonal homes with intermittent use may require additional attention to prevent sulfide accumulation during periods of inactivity.
To summarize, the USGS data for Connecticut’s FIPS 160 aquifer provides a reliable regional indication of sulfide presence and concentration ranges. Deciding between treatment options involves recognizing sulfide’s specific odor characteristics, how the Autotrol system neutralizes it, understanding the geologic sources, and considering household water use demands. Testing your own water remains essential to tailor the solution effectively.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2017-09-08. 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 Sulfide in the 112DFSF aquifer (FIPS 160): 4 results from 3 wells, median 0.0165 mg/L, range 0.0-0.1 mg/L; none above any federal threshold
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