EtG cutoff levels explained – EtG levels chart
Learn how EtG cutoff levels such as 100, 300, and 500 ng/mL are commonly discussed, what an EtG levels chart means, and why results can vary.
EtG levels chart and cutoff comparison
| Cutoff level | Sensitivity | What it usually means | Important limitation |
|---|---|---|---|
| 100 ng/mL | More sensitive | May identify lower EtG levels and extend estimated detection window. | May be more sensitive to low-level or incidental exposure contexts. |
| 300 ng/mL | Middle cutoff | Often discussed as a middle-ground between lower and higher thresholds. | Interpretation depends on the lab, test type, and program. |
| 500 ng/mL | Higher cutoff | Commonly discussed in screening or confirmation contexts. | A higher cutoff does not make results universally predictable. |
This chart is educational only. Cutoff levels and interpretation can vary by laboratory, test provider, test type, and program requirements.
This page is for educational information only. It does not interpret your personal lab result or predict test outcomes.
What do EtG cutoff levels mean?
An EtG cutoff level is the concentration threshold a test uses when evaluating whether EtG is detected at or above a specified level. Commonly discussed cutoff levels include 100, 300, and 500 ng/mL.
What is an EtG cutoff?
A threshold used by a testing method or program. If a result is at or above the cutoff, the test may be interpreted differently than a result below it.
Why lower cutoffs are more sensitive
Lower cutoffs can identify smaller amounts of EtG, which can increase the estimated detection window but also increase sensitivity to context.
Why cutoff levels vary by test provider
Different labs, test panels, programs, and methods may use different cutoffs. Always rely on the official lab report or program documentation.
100, 300, and 500 ng/mL EtG cutoff levels
100 ng/mL cutoff
More sensitive cutoff
A 100 ng/mL cutoff is more sensitive and may extend the estimated detection window compared with higher cutoffs.
300 ng/mL cutoff
Middle cutoff
A 300 ng/mL cutoff is often discussed as a middle cutoff. Interpretation depends on the test provider and program.
500 ng/mL cutoff
Higher cutoff
A 500 ng/mL cutoff is commonly discussed in screening and confirmation contexts. It still cannot predict a personal result.
Urine alcohol level vs EtG level
A urine alcohol level and an EtG level are not the same thing. Alcohol itself is usually detectable for a shorter period, while EtG is a metabolite that can remain detectable longer.
Need a broad educational estimate?
Compare a detection-window estimate across 100, 300, and 500 ng/mL cutoff levels.
EtG and EtS levels explained
EtG stands for ethyl glucuronide, and EtS stands for ethyl sulfate. Both are minor metabolites of ethanol that may be used as alcohol exposure markers.
EtG cutoff levels for probation contexts
Programs may use different testing methods and cutoff levels. This page cannot tell you what cutoff applies to your situation.
This page is educational only and is not legal advice. For official information, rely on the testing provider, lab report, attorney, or program documentation.
Why EtG levels can vary
Cutoff level
Lower cutoffs are more sensitive than higher cutoffs.
Testing method
Different labs and test panels may use different methods.
Timing
Time since exposure can affect detection.
Sample conditions
Sample concentration can affect interpretation.
EtG and EtS
Some tests consider both markers together.
Individual variation
People do not produce or eliminate biomarkers identically.
Frequently asked questions
What are EtG cutoff levels?
EtG cutoff levels are thresholds used by a test or program when evaluating EtG detection. Commonly discussed cutoffs include 100, 300, and 500 ng/mL.
What is an EtG levels chart?
An EtG levels chart is an educational comparison of cutoff levels and how more sensitive or less sensitive thresholds may affect detection-window discussions.
What does a 100 ng/mL EtG cutoff mean?
A 100 ng/mL cutoff is more sensitive than higher cutoffs. It may detect lower EtG levels, but interpretation depends on the lab and test context.
What does a 300 ng/mL EtG cutoff mean?
A 300 ng/mL cutoff is often discussed as a middle threshold between 100 and 500 ng/mL. It is shown here for educational comparison only.
What does a 500 ng/mL cutoff mean?
A 500 ng/mL cutoff is a higher threshold commonly discussed in EtG testing contexts. Actual interpretation depends on the test provider, lab method, and program requirements.
Are EtG and EtS levels the same?
No. EtG and EtS are different ethanol metabolites. Some testing contexts may discuss them together, but their cutoff levels and interpretation can differ.
What cutoff is used for probation?
There is no universal cutoff for every probation or monitoring program. The correct source is the official lab report, testing provider, attorney, probation officer, or program documentation.
Can this page tell me if I will pass?
No. This page cannot predict a test result or tell you whether you will pass or fail. It is only an educational guide to cutoff levels and terminology.
Related EtG guides
Estimate a broad educational detection window.
Realistic EtG test detection times.
EtG test facts and limitations.
Difference between EtG and EtS markers.