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Contaminant Testing Guides

Guides and resources in this category.

Heavy Metals in Well Water: What to Test For and When

Testing water from a private well, with dramatic lighting and fog.

Well water testing for heavy metals separates dangerous contamination from aesthetic annoyances. Six heavy metals lurk in private wells across America, and only three require emergency action, but you won’t know which ones without the right tests. Key Takeaways: Lead requires first-draw sampling within 6 hours of last water use, standard flushed samples miss the … Read more

Iron Testing for Well Water: When It’s Cosmetic vs a Problem

Scientist analyzing iron test results in a lab with water samples.

Well water testing for iron reveals more than a single number on your lab report. Your water test shows 2.8 mg/L iron, but the lab report doesn’t tell you whether this will stain your laundry, clog your pipes, or require a $3,000 treatment system. Key Takeaways: • Iron above 0.3 mg/L causes aesthetic problems but … Read more

Nitrate in Well Water: Why It’s the One Test You Can’t Skip

Rural landscape with well and fertilizer runoff, dramatic lighting.

Well water testing for nitrates isn’t optional when you have infants in the house. Nitrate is the silent well water contaminant that turns drinking water into a potential death sentence for babies, and 43% of private wells tested in agricultural areas exceed safe levels. Key Takeaways: Nitrate above 10 mg/L causes blue baby syndrome in … Read more

PFAS Testing for Private Wells: What You Need to Know

Technicians testing a well for PFAS amid dramatic lighting and fog.

Well water testing for PFAS is becoming critical as these forever chemicals spread through groundwater nationwide. Unlike iron or bacteria, you can’t taste, smell, or see PFAS contamination until it’s already in your family’s system. Key Takeaways: • PFAS testing costs $300-600 per sample, 10x more than basic well water testing, because it requires specialized … Read more

Arsenic in Well Water: Testing, Safe Levels, and What to Do

A rural well with water flowing into a bucket, surrounded by fog.

Well water testing for arsenic matters because this invisible carcinogen has no taste, smell, or color, yet causes cancer at levels the EPA considers unsafe for 2.1 million Americans. Your regional geology determines whether arsenic lurks in your water supply. Key Takeaways: EPA’s Maximum Contaminant Level for arsenic is 10 parts per billion, any detection … Read more

Coliform Bacteria in Well Water: Testing, Results, and What to Do

A water well showing potential contamination in a dramatic, detailed setting.

Well water testing for coliform bacteria reveals whether harmful microorganisms have invaded your water supply. A positive coliform test means bacteria that shouldn’t be in your well water are there, but whether you stop drinking it today depends on which type tested positive. Key Takeaways: Total coliform bacteria indicate potential contamination pathways but aren’t necessarily … Read more

Well Water Contaminants: What to Test For and Why It Matters

Technician testing water sample in a high-tech lab with dramatic lighting.

Well water quality testing faces a brutal reality: your well could contain over 150 potential contaminants, but testing for everything would cost thousands. Here’s how to prioritize what matters for your family’s safety and your wallet. Key Takeaways: • Health-risk contaminants (bacteria, arsenic, nitrate, lead) require immediate testing and treatment, aesthetic issues can wait• Regional … Read more