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Variation in Rust and Hardness Levels Over Time in Rockingham County

Sampling Dates and Range of Iron Concentration

Between March 27, 2014, and August 22, 2019, groundwater sampling in Rockingham County’s aquifer 112ICCC recorded iron concentrations ranging from 0.016 to 327.0 micrograms per liter. These samples were taken from wells 83 feet deep, providing a multi-year perspective on rust-related minerals in this area.

Consistency of Iron Detections Throughout Sampling

Every sample in this dataset detected iron, with none falling below the laboratory’s reporting limit across 53 measurements, showing that iron presence is consistent but varies in concentration over time.

Household Signs Linked to Rust and Hardness

Visible Discoloration and Staining

Rust in water can cause reddish or brown staining on plumbing fixtures and laundry. This staining often signals the presence of iron compounds that oxidize when exposed to air.

Effect on Water Hardness and Soap Performance

Hardness, generally caused by minerals like calcium and magnesium, can reduce soap lather and leave scale buildup. While iron does not cause hardness, rust and hardness often coexist, contributing to these effects.

What Does Not Indicate Rust or Hardness

Cloudiness or sediment might stem from other sources and does not specifically confirm rust or hardness problems. Testing is necessary to establish the cause.

Interpreting Measured Ranges Against Federal Water Standards

Iron Concentrations Below Federal Health-Based Limits

All recorded iron levels in this dataset remain below federal health-based thresholds, indicating no regulatory health concern from these measurements alone.

Iron Levels and Aesthetic Secondary Standards

While iron is detected consistently, exceeding secondary standards mainly affects taste, staining, or plumbing corrosion rather than safety. These are aesthetic considerations that may prompt treatment.

Distinguishing Rust and Hardness from Other Common Water Issues

Difference from Sediment or Particulate Matter

Rust-caused discoloration relates to dissolved iron oxidizing and precipitating, unlike sediment which is suspended solid particles. The look and feel of water help differentiate these.

Distinction from Microbial or Chemical Contaminants

Rust and hardness do not indicate bacterial or chemical contamination. Presence of iron is a natural mineral occurrence, not a sign of pathogens or harmful chemicals.

Comparing Rockingham County’s Record with Neighboring Areas

Avoiding Overinterpretation When Comparing Regional Data

Iron levels and hardness characteristics vary by aquifer and local geology. Comparing Rockingham County’s aquifer 112ICCC to neighboring counties should consider differences in sampling methods and aquifer depth to avoid inaccurate conclusions.

Recognizing Local Geological Influences on Water Quality

Differences in mineral content across regions reflect natural variability rather than water quality problems. Focus on local well testing for personal water condition confirmation.

Summary and Further Information

The iron concentration data described here come from government sampling of wells 83 feet deep in Rockingham County's aquifer 112ICCC collected between 2014 and 2019. For water treatment addressing rust and hardness, the Autotrol Well Rust + Hardness System provides a documented solution designed to handle such regional water characteristics. Official water quality data are available at the U.S. Geological Survey groundwater monitoring site for further review.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2019-08-22. 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 112ICCC aquifer (Rockingham County): 53 results from 1 wells, median 235.0 ug/L, range 0.016-327.0 ug/L; none above any federal threshold