ND vs Below LOQ: How to Read Coffee Lab Reports

ND vs below LOQ is one of the most important distinctions to understand when reading coffee lab reports. Both terms can appear beside a mold-related compound or another tested substance, and neither term alone tells you that one coffee is cleaner than another.

For shoppers who read labels carefully, the useful question is simple: What did the lab test, what limit did it use, and which coffee sample does the report represent? A complete certificate of analysis, often called a COA, gives you the context needed to compare claims fairly.

At Café Nairobi, we believe clean-coffee conversations deserve clear language. Our Kenyan Arabica begins in the Mount Kenya highlands, where high elevation, mineral-rich volcanic soil, shade-grown cultivation, and careful processing shape a smooth, full-bodied cup with bright floral character. Lab-report terminology helps you evaluate testing claims with the same care you bring to choosing a roast or brewing your morning cup.

ND vs Below LOQ: the short answer

ND means not detected under the rules and limits of a specific test. It does not automatically mean a substance is universally absent or present at absolute zero.

Below LOQ means the result is below the laboratory's limit of quantification. The lab may have detected a signal, yet the amount is too low for the method to measure reliably with acceptable performance.

Neither label is automatically better. A below-LOQ result is not a stronger version of ND. The full report, including the test method, limits, units, sample details, and qualifiers, provides the meaningful comparison.

“ND means no reportable detection under that test’s rules. Below LOQ means below its reliable quantification level; a trace may still be detected. Neither means universal zero.”

What “not detected” means on a coffee report

Laboratories use validated methods that can detect substances only above certain analytical thresholds. The limit of detection, or LOD, is the lowest level at which a method can identify that a substance may be present. Results below that threshold may be reported as ND, depending on the laboratory’s reporting rules.

That is why ND needs context. Look for the report legend and the method’s detection limit or reporting limit. A report that says “ND” and lists a numeric limit gives you more useful information than a standalone marketing claim.

For example, imagine two hypothetical roasted-coffee reports for the same chemical:

• Report A: ND, reporting limit 1 μg/kg
• Report B: ND, reporting limit 10 μg/kg

These invented examples do not establish a safety limit or represent Café Nairobi results. They show why the number matters: both samples could contain the same amount below 1 μg/kg. A lower threshold gives the lab a different reporting capability; it does not, by itself, prove the coffee contains less.

What below LOQ means

The limit of quantification, or LOQ, is the lowest level at which a laboratory can measure an amount with acceptable reliability. It sits at a different point from the LOD.

A result between the LOD and LOQ can be detected as a trace but may be too low to quantify precisely. Food-testing guidance describes these results as trace rather than ND. This distinction matters because detection and reliable measurement are related, yet they answer different questions.

When you see “below LOQ,” read it as a request for more context. Check whether the report gives the LOQ, whether it also gives an LOD, and how the laboratory defines its result qualifiers. The report legend is part of the result.

Why “below LOQ” is not automatically preferable

It can be tempting to rank the phrases: below LOQ first, ND second. That shortcut misses the analytical details. An ND result may reflect one detection threshold, while a below-LOQ result may reflect another method and another threshold. Comparing labels alone can lead to the wrong conclusion.

A fair comparison matches the analyte, method, units, sample type, and numeric limits. Ask for the complete COA when a claim feels too broad or vague.

Match the test, units, and coffee sample

Coffee testing covers several different categories. The category matters as much as the abbreviation beside the result.

• CFU/g means colony-forming units per gram. This unit is used for microbiological counts, such as yeast and mold testing.
• μg/kg means micrograms per kilogram. This unit may appear for chemical analytes, including mycotoxins.
• Mold counts and mycotoxin measurements are different tests. A mold result does not answer the same question as a mycotoxin result.

Sample type also changes what a report can tell you. Whole or roasted beans, ground coffee, and diluted brewed coffee are different materials. A result for one material should not be treated as a direct result for another. Review the sample description before drawing conclusions.

For home brewers, this is a practical reminder: choose coffee for its flavor and brewing fit, then assess testing claims based on the exact product sample and report. A bright, floral light roast Kenyan coffee can shine in a pour-over, while the lab documentation still needs to identify the sample tested.

How to compare coffee lab reports fairly

Use this five-step checklist when evaluating a coffee brand’s lab claim.

1. Identify the analyte. Read the exact substance or category tested. “Clean” is a broad marketing word; a COA should name the test panel.
2. Read the result qualifier. Is it ND, detected, trace, below LOQ, or a numeric result? Use the report’s own legend to interpret the term.
3. Find the numeric limit. Look for the LOD, LOQ, or reporting limit. Two ND results can carry different thresholds.
4. Match units and material. Compare CFU/g with CFU/g and μg/kg with μg/kg. Confirm that both reports tested comparable coffee samples.
5. Match the COA to the coffee you are buying. Check the sample ID, lot or batch reference, sampling date, analysis date, and listed test panel.

One tested sample does not establish the status of every bag of coffee. A “pass” also needs a stated specification to have a clear meaning. It is valuable evidence about the sample and test conditions listed on that report; it does not prove universal zero or establish a health benefit.

Check the laboratory’s accreditation scope

Accreditation can help you assess a laboratory’s competence, yet the logo itself is only a starting point. Confirm the laboratory’s accreditation status and the scope of tests covered through the relevant accreditation body. If a label or qualifier is unclear, asking the laboratory for clarification is the responsible next step.

Café Nairobi works with Cambium Analytica, an ISO/IEC 17025 accredited laboratory. When reviewing any current COA, confirm that the specific analysis you are relying on is clearly listed and that the report matches the coffee lot in question.

From Mount Kenya to your brewing routine

Careful sourcing and clear information belong together. Founder Martin Kabaki grew up on Kenya’s coffee farms and brings 15 years of U.S. sourcing and roasting experience to Café Nairobi. He partners directly with smallholder farmers and pays them fairly, honoring the skill behind every harvest.

Our single-origin Kenyan Arabica is fully washed and sun-dried before roasting in Jacksonville, Florida. The result is a coffee with smooth texture, low perceived acidity, bright floral notes, and satisfying body. Those qualities give you dependable options across popular brew methods.

• Choose Kenyan espresso roast for a concentrated, full-bodied shot or milk drink.
• Choose Kenyan cold brew roast for a refreshing, smooth cold-brew routine.
• Choose a lighter roast for floral aromatics and lively clarity in pour-over brewing.

Roast selection and lab-report reading serve different purposes. One helps you build the flavor experience you want; the other helps you assess a specific testing claim accurately.

FAQ: coffee lab reports and result limits

Does ND mean zero contaminants?

No. ND means the substance was not reportably detected according to that laboratory’s method and reporting rules. Read the report’s detection or reporting limit to understand what ND means in context.

Is below LOQ better than ND?

Neither term automatically ranks above the other. Below LOQ means a result falls below the method’s reliable quantification level and may represent a trace detection. Compare the full test details and numeric thresholds before deciding what the results mean.

Are mold counts the same as mycotoxin tests?

No. Mold counts are microbiological results commonly reported in CFU/g. Mycotoxin analyses measure specific chemical compounds and may be reported in μg/kg. Each test answers a different question.

What should I ask for before relying on a coffee lab claim?

Ask for the complete COA and confirm the sample ID, coffee lot, sampling and analysis dates, test panel, units, result qualifiers, numeric limits, and laboratory scope. This is the clearest way to connect a claim to the coffee you plan to purchase.

Read the report before making the comparison

Smart coffee buying starts with the details: the substance tested, the analytical limit, the sample, and the method. ND and below LOQ are useful laboratory terms when they are read in full context. They are not shortcuts to a universal cleanliness ranking.

For current documentation and help matching a report to the relevant coffee lot, view Café Nairobi’s lab report information. Then enjoy your chosen Kenyan roast with a clearer understanding of what the report says.