Risk Assessment
Related Topics
Environmental Health Division
Chemicals Under Review
The Health Risk Assessment unit conducts reviews for contaminants through the Health Risk Limits program and Contaminants of Emerging Concern program. Contaminants are selected for review in partnership with state agencies or may be submitted for review from the public.
Completed contaminant reviews and their year of completion are available on the Drinking Water Contaminants of Emerging Concern (CEC) program. Chemicals will be added to this list as new reviews are initiated. MDH invites interested parties to submit toxicity studies that relate to these chemicals and that are relevant to human health.
Upon completion of review or re-evaluation, chemicals are removed from the table below and added to the Human Health-based Water Guidance Values Table. For more information, contact the Health Risk Assessment Unit.
Water evaluations
Chemicals in italics are being reviewed under the Drinking Water Contaminants of Emerging Concern (CEC) program.
| CAS Number* | Chemical Name | Date Posted |
|---|---|---|
| 7440-38-2 | Arsenic | 5/29/2025 |
| 95-53-4 | o-Toluidine | 4/3/2025 |
| 14477-72-6 | Trifluoroacetate (TFA) | 4/9/2025 |
*CAS Number = Chemical Abstracts Service Registry Number