ETG Levels Chart – Alcohol Detection in Urine
The ETG Levels Chart shows how Ethyl Glucuronide (ETG) concentrations in urine decline over time after drinking alcohol. This chart helps you estimate when ETG levels might drop below 100ng/mL or 500ng/mL cutoffs — the two most common testing thresholds used in labs and probation programs.
ETG Level Estimator Tool
Use the calculator below to estimate ETG concentration at a given time since your last drink:
Understanding ETG Levels
ETG is a metabolite of alcohol formed in the liver when ethanol combines with glucuronic acid. Unlike breath or blood alcohol concentration (BAC), ETG remains detectable in urine for much longer — even after alcohol is no longer measurable in your bloodstream.
Typical ETG Detection Table
Below are typical ETG detection estimates for two standard cutoff levels:
| Hours After Drinking | Approx. ETG Level (100ng/mL cutoff) | Approx. ETG Level (500ng/mL cutoff) |
|---|---|---|
| 6 | 5000 ng/mL | 4800 ng/mL |
| 12 | 1500 ng/mL | 1200 ng/mL |
| 24 | 300 ng/mL | 200 ng/mL |
| 36 | 90 ng/mL | Below cutoff |
| 48 | Below cutoff | Below cutoff |
These values are average estimates. Real ETG concentrations depend on metabolism, fluid intake, and alcohol quantity.
What Affects ETG Levels?
- Amount and type of alcohol consumed
- Individual metabolism and liver health
- Hydration and urine dilution
- Testing method sensitivity
External References
- NIH: Ethyl Glucuronide as a Marker of Recent Alcohol Use
- US National Library of Medicine – ETG detection times in urine
- ETG Elimination Time Calculator
- ETG Half-Life Calculator
FAQ: ETG Levels & Detection
How long can ETG be detected in urine?
ETG can remain detectable for up to 80 hours depending on drinking patterns and cutoff sensitivity.
What are cutoff levels in ETG testing?
The cutoff level (100ng or 500ng) defines the threshold below which a test is considered negative.
Can ETG levels vary by person?
Yes. Factors like body weight, hydration, and liver function cause ETG variability between individuals.
Disclaimer: The ETG Levels Chart is for informational and educational purposes only. It should not be used to attempt to alter test outcomes.
Last updated: October 2025 | Author: Saira Pansota