Following SB 19-181, the Colorado Oil & Gas Conservation Commission (now ECMC) overhauled many rules. One rule now requires operators to disclose all chemicals used in fracking and in spills, including trade secret ingredients, but there's a catch: They still don’t have to reveal the exact chemical identity to the public — only to regulators and, in limited cases, medical professionals.
Additionally:
The rule rollout has been slow, and compliance remains spotty.
There's no standardized enforcement mechanism to verify what’s actually used on-site.
If a spill happens, the data available to the public is still often vague or incomplete — and trade secret protections can render the chemical list nearly meaningless if you're trying to assess toxicity. (As we've tried, ourselves)