Seasonal and Multi-Year Variation in Arsenic Levels

Sampling Dates Cover Nearly Six Years

The recorded data spans from July 26, 2010, to June 16, 2016, showing arsenic measurements across multiple seasons and years.

Concentration Ranges Reflect Natural Fluctuations

Arsenic levels in the sampled wells ranged from 0.24 to 10.2 micrograms per liter (µg/L), with a median value of 0.97 µg/L. These values indicate variability over time and location within the aquifer.

All Measurements Are Below Federal Arsenic Thresholds

None of the 73 results from 34 wells exceeded federal limits for arsenic in drinking water, as established by the U.S. Environmental Protection Agency.

Differentiating Arsenic from Other Common Water Concerns

Arsenic Detection Is Not the Same as a Health Violation

Detection means arsenic was measured in all samples, but none surpassed regulatory safety levels. This differs from aesthetic issues like staining or taste changes, which involve other substances.

Arsenic Does Not Cause Visible Water Cloudiness

Unlike some minerals, arsenic presence is not indicated by discolored or cloudy water; visual signs should not be used to infer arsenic levels.

Well or Tap Water Must Be Tested Separately for Personal Assessment

The area data reflects several wells but does not indicate the arsenic level of any individual household water supply.

Comparing Miami-Dade County’s Arsenic Data to Neighboring Areas

Local Geology Influences Arsenic Concentrations

The aquifer designated 112BSCNN underlies Miami-Dade County specifically; neighboring counties may have different geological characteristics affecting arsenic levels.

Use Caution Not to Assume Similar Levels Across Boundaries

Regional arsenic data should not be generalized beyond its defined area without corresponding local test results.

Differences in Sampling Depth Affect Comparability

Wells sampled ranged from 14 to 132 feet deep; variations in depth in nearby counties’ wells could lead to different arsenic readings.

Sample Size and Well Distribution Behind the Arsenic Records

Data Based on 73 Measurements from 34 Different Wells

The sample size provides a reasonable regional picture but does not capture every well or water source in Miami-Dade County.

A Small Number of Wells Limits Fine-Scale Conclusions

While covering a range of depths, the wells do not represent every neighborhood or household source within the county.

Sampling Period Spans Nearly Six Years, Supporting Robust Trend Analysis

Repeated measurements over time show consistency of arsenic detection, rather than isolated instances.

Matching Treatment Capacity to Household Water Use

Estimate Daily Water Demand Before Choosing Treatment

A household should consider its water usage to ensure any arsenic treatment system meets daily volume requirements effectively.

Consider Peak and Average Usage for Accurate Capacity Planning

Accounting for visitors or daily fluctuations helps select an appropriate filtration size that maintains performance.

Fleck Arsenic Filter Ships Ready to Configure for Home Use

This system is designed to handle residential water flow rates and can be set up to address arsenic detected presence efficiently once your water testing confirms need.

Adjusting for Different Residential Situations

Large Households May Require Higher Treatment Flow Capacity

More occupants or heavier water consumption increase the demand on filtration equipment.

Second Homes or Seasonal Properties Need Consideration for Intermittent Use

Systems may require flushing or maintenance to remain effective if usage is sporadic.

Use Local Testing to Confirm Specific Needs for Each Property Type

Because arsenic concentrations vary, even within the same county and aquifer, individual analysis is important.

What This Area's Data Does Not Tell You

It Does Not Prove the Arsenic Level in Your Well or Tap Water

Only testing your own water supply provides firm results for your situation.

Detection Does Not Mean Unsafe Water by Federal Standards

All samples were below regulatory thresholds, so detection alone is not a cause for alarm.

Area Data Should Not Replace Professional Water Testing

Using specific local numbers as a guide rather than a definitive assessment ensures appropriate treatment decisions.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2016-06-16. 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 112BSCNN aquifer (Miami-Dade County): 73 results from 34 wells, median 0.97 ug/L, range 0.24-10.2 ug/L; none above any federal threshold