Acadia Parish Aquifer 112CHCTU and Household Water Sources
Water supplied to homes in Acadia Parish that draw from the 112CHCTU aquifer generally originates from wells ranging between 145 and 280 feet deep. Groundwater moves through this aquifer before reaching residential taps, carrying with it naturally occurring minerals and elements, including arsenic. Understanding what government sampling has found helps clarify expectations for water quality but does not replace testing of individual household wells.
Why Aesthetic Secondary Standards Differ from Health-Based Limits for Arsenic
Arsenic Detection vs. Regulatory Thresholds
The U.S. Geological Survey (USGS) samples from this aquifer have detected arsenic in every recorded instance but at levels below federal health-based maximum contaminant levels. Detection means arsenic was measured; it does not imply a violation or unsafe water.
Effect of Aesthetic Criteria
Arsenic is not typically evaluated for aesthetic effects such as taste or staining but is regulated primarily for health reasons. Thus, aesthetic secondary standards usually do not apply to arsenic.
How Seasonal or Multi-Year Variation Shows in the Record
Sampling Period
USGS data covers five samples taken from four separate wells between September 21, 2011, and August 19, 2020. This nearly decade-long span provides insight into the stability of arsenic presence in this aquifer over time.
Observed Concentration Range
Arsenic concentrations ranged from 0.07 to 1.3 micrograms per liter, with a median value of 0.49 micrograms per liter. These measurements indicate low-level fluctuation consistent with natural geological variation rather than sharp changes.
How Sample Depth, Well Depth, or Source Type Influences Expectations
Depth of Sampled Wells
The wells sampled spanned depths of 145 to 280 feet, representing typical residential well depths in the area. Deeper wells may experience different arsenic levels depending on geological strata.
Variation by Well Location
Since samples came from multiple wells, arsenic concentrations may vary locally within Acadia Parish due to differences in subterranean rock composition and groundwater movement paths.
Maintenance Rhythm of the Documented Technology
Using the Autotrol Arsenic Filter
The Autotrol Arsenic Filter ships ready to configure for household water treatment. It is designed to reduce arsenic effectively, operating through a filtration process that captures arsenic particles before they reach taps.
Regular Service and Monitoring
To maintain effectiveness, the filter requires routine service such as media replacement or regeneration according to manufacturer guidelines. Users should monitor water quality periodically with testing to confirm continued arsenic reduction.
What Distinguishes Arsenic from the Two Problems Most Often Confused With It
Arsenic vs Iron and Manganese
While iron and manganese can cause visible water discoloration and taste issues, arsenic is usually colorless and tasteless, making it harder to detect without testing.
Arsenic vs Bacterial Contamination
Bacterial contamination impacts water safety through biological means and often produces noticeable smells or turbidity. Arsenic presence is chemical and requires laboratory measurement to detect.
Summary of Arsenic Findings and Next Steps
The USGS groundwater sampling for Acadia Parish’s 112CHCTU aquifer shows low-level arsenic detections in wells ranging from 145 to 280 feet deep, with concentrations well below federal health thresholds. This record reflects area-wide conditions and not any single household’s water. To understand individual household arsenic levels, testing your own water supply is necessary. Using a treatment solution like the Autotrol Arsenic Filter, which ships ready to configure, can help manage arsenic if found at concerning levels.
For further details and official data, you can review the USGS groundwater sampling information at their monitoring location site.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2020-08-19. 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 Arsenic in the 112CHCTU aquifer (Acadia Parish): 5 results from 4 wells, median 0.49 ug/L, range 0.07-1.3 ug/L; none above any federal threshold
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