How Iron Enters Groundwater in Washington County’s Aquifer 112SDGVD
Iron is naturally present in local soils and rocks
Iron commonly dissolves from minerals in the soil and bedrock into groundwater sources like aquifers. In Washington County, the 112SDGVD aquifer shows widespread iron presence due to geological makeup. This iron can become part of household water drawn from wells tapping into this aquifer.
Depth of wells sampled relates to iron presence
The groundwater wells sampled in the area ranged from 25 to 249 feet deep, indicating that iron detection occurs across a wide depth range within the aquifer.
What Separates Iron and Hardness Issues from Other Water Concerns
Iron is a common mineral, distinct from contaminants
Unlike contaminants that pose health risks, iron is a naturally occurring mineral whose presence affects water aesthetics and appliances but is not a safety violation. It is important to distinguish this from substances regulated for health safety.
Hardness relates primarily to calcium and magnesium, not iron
Hard water is caused by calcium and magnesium ions dissolved in water, which differ chemically and in effect from iron. Both iron and hardness can coexist but require distinct considerations.
Interpreting Certified Laboratory Tests for Iron in Washington County Water
Laboratory reports indicate iron concentration in micrograms per liter (ug/L)
Tests measure iron levels to help understand concentrations in well water. Government sampling from 22 wells over many years showed iron detected in most samples, ranging from as low as 3.3 ug/L to as high as 11,800 ug/L.
Detection does not imply a violation or unsafe condition
None of the samples in this dataset exceeded federal thresholds. Detection simply confirms iron presence — it does not indicate health risk or mandatory treatment.
Observing Seasonal and Multi-Year Changes in Iron Levels
Data covers 2010 through 2026, allowing trend observation
USGS sampling conducted intermittently from August 2010 to April 2026 recorded iron results that vary widely across time and wells, reflecting natural fluctuations rather than uniform levels.
Median iron concentration is approximately 1,185 ug/L
This median value summarizes the middle of measured iron concentrations in the area’s sampled wells over the full period, providing a useful benchmark but not a household-specific value.
Reading the Washington County Iron Record as a Homeowner
Expect variability between wells and seasons
Iron levels in your household water may differ from area medians since local conditions vary even within the same aquifer. Testing your own water is essential for accurate assessment.
Range of detected iron indicates potential for low to moderate concentrations
The wide range from 3.3 ug/L to 11,800 ug/L suggests some wells have much higher iron than others. Homeowners should consider this when assessing equipment needs based on their own water test results.
How Treated Water Differs at the Tap with the Pentair Iron + Hard Water (Well) System
The system is designed to reduce iron and hardness minerals effectively
The Pentair Iron + Hard Water (Well) System, with a capacity of 32,000 grains, addresses iron and hardness by conditioning the water to reduce scaling, staining, and metallic taste common with these minerals.
Treated water quality aligns with homeowner comfort and appliance longevity
Using this system typically results in water that looks clearer, tastes better, and reduces buildup on fixtures and appliances that iron and hardness could cause.
This summary reflects USGS groundwater sampling data from 22 wells in Washington County’s 112SDGVD aquifer. For full details, see the USGS monitoring location at waterdata.usgs.gov/monitoring-location/412637095565901/.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-04-15. 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 Iron in the 112SDGVD aquifer (Washington County): 85 results from 22 wells, median 1185.0 ug/L, range 3.3-11800.0 ug/L; none above any federal threshold