Contaminant · PFAS
ADONA in drinking water
4,8-dioxa-3H-perfluorononanoic acid, an ether PFAS used as a PFOA replacement.
What the rules say
ADONA has no federal limit or EPA health reference value.
Read the EPA source for ADONA.
Across the country
EPA tested 10,307 water systems for ADONA and found it in 3. Half of the systems that found it measured less than 3.3 ppt, and one in ten measured more than 6.7 ppt.
EPA's final UCMR 5 occurrence file contains 66,361 ADONA results from 10,307 systems. 4 results were at or above the minimum reporting level, across 3 systems. Among detections, the median was 3.3 ppt and the 90th percentile was 6.7 ppt.
Systems with the highest recorded ADONA results
| System | State | Population served | Recorded value | Records / periods |
|---|---|---|---|---|
| Aquarion-Simsbury Regional CT1280021 | Connecticut | 14,691 | 8.1 ppt | 1 |
| City of Sugar Land TX0790005 | Texas | 90,909 | 3.4 ppt | 2 |
| City of Gonzales TX0890001 | Texas | 9,172 | 3.2 ppt | 1 |
Filters and testing
NSF/ANSI 58 (reverse osmosis)
A standard number by itself is not a contaminant claim. Check the product's current certification listing and performance data sheet for ADONA or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.