Alcohol Detection in Urine Using ETG
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
Use the calculator below to estimate ETG concentration at a given time since your last drink:
Understanding ETG Levels in Urine Tests
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 (Urine Levels)
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.
Factors Affecting ETG Levels?
- Amount and type of alcohol consumed
- Individual metabolism and liver health
- Hydration and urine dilution
- Testing method sensitivity
Trusted External References on ETG Testing
- 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
ETG Levels & Detection FAQs
How Long Is ETG Detectable in Urine?
ETG can remain detectable for up to 80 hours depending on drinking patterns and cutoff sensitivity.
What Are ETG Cutoff Levels?
The cutoff level (100ng or 500ng) defines the threshold below which a test is considered negative.
Do ETG Levels Vary Between Individuals?
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.