Local Aquifer and Water Delivery Overview
Water in Washington County, Rhode Island, often comes from aquifer 112SRFD, a groundwater source tapped by wells typically between 72 and 95 feet deep. This aquifer supplies residential households with water that can contain varying levels of heavy metals such as copper. Understanding what government data shows about copper presence here helps residents assess their water quality realistically.
Reading a Certified Laboratory Test for Copper
What the test measures
Copper levels in water samples are reported in micrograms per liter (ug/L). A certified lab test will list detected copper concentrations, often alongside reporting limits indicating the minimum amount the test can reliably measure.
Interpreting detected versus non-detected results
Detected values mean copper was measured, not that concentrations pose a violation or health risk. In Washington County’s aquifer 112SRFD, copper was detected in all sampled wells at concentrations ranging from 6.0 to 26.8 ug/L, with a median of 11.95 ug/L. None of these results exceeded any federal thresholds.
Distinguishing Heavy Metals Issues from Other Water Concerns
Difference from hardness or iron problems
Hardness and iron can cause scale buildup or reddish staining but are chemically distinct from copper, a heavy metal with different sources and effects.
Difference from microbial contamination
Heavy metals like copper are chemical constituents, not biological contaminants like bacteria or viruses. Treatment approaches and testing differ accordingly.
Sample Size and Its Impact on Data Interpretation
Number of samples and wells
The government data for aquifer 112SRFD comes from four copper measurements taken in two separate wells over several years (2011 to 2019). While this provides a snapshot, it reflects a limited sample size for the broader area.
What a small sample means
Fewer data points mean uncertainty remains about the full range of copper levels across all wells and seasons. Individual household wells may vary from these area measurements.
Considerations for Different Household Water Needs
Large households
Higher water use in large homes can challenge existing equipment that treats heavy metals, requiring evaluation of capacity and flow rates.
Second or seasonal homes
Intermittent water use can affect the accumulation and performance of treatment elements for copper removal.
Information to Gather Before Seeking Treatment Advice
Obtain a recent certified laboratory test of your household water
Only a test specific to your well or water source accurately determines copper concentration for your water.
Document your water use patterns
Note household size, daily water use, and any changes in water quality or equipment performance.
Record current water treatment setup details
Know what devices or filters you use and their specifications to match new solutions appropriately.
Additional Questions for Commercial or Industrial Water Users
Compliance and regulatory requirements
Businesses may face different standards and permitting processes regarding copper and other heavy metals.
Higher water volume and pressure demands
Commercial systems often require equipment scaled to greater flow and use than household setups.
Summary
Government sampling in Washington County’s aquifer 112SRFD shows copper consistently detected below federal thresholds, based on limited wells and samples. Household water users should obtain their own water testing and usage data to decide if enhanced treatment, such as the C-Series Heavy Metals Filter, suits their needs.
This checklist guides understanding copper data, distinguishing heavy metals issues, and preparing detailed information before choosing treatment options.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-09-17. 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 Copper in the 112SRFD aquifer (Washington County): 4 results from 2 wells, median 11.95 ug/L, range 6.0-26.8 ug/L; none above any federal threshold