Ask a Scientist: How Can We Make Sure Environmental Rules Work in the Real World?

Homeowners often deal with more than one source of pollution at a time — traffic exhaust, contaminated tap water, industrial emissions nearby — but environmental rules usually judge each pollutant separately instead of looking at the combined effect on health. This approach, called cumulative impacts analysis, tries to fix that by pulling in health data, pollution maps, and information about a community's living conditions before permits or regulations get decided.

In late 2024, the EPA released a framework meant to build this approach into its work and asked for public comment. Under the Trump administration, that process stalled: the agency eliminated the offices that developed the framework, disbanded its advisory councils, and never responded to the comments it collected. The Union of Concerned Scientists reviewed those public comments and released its own report, arguing that cumulative impacts analysis works when it comes with real enforcement, includes input from health workers and people affected in their own workplaces and neighborhoods, and treats community experience as seriously as lab data.

With federal action stalled, the report points to states and localities as the places where this can still move forward. At least seven states already have cumulative impacts laws or regulations, mostly used in air pollution permitting, and some cities have their own rules too. If your state or city is one of them, it could mean more scrutiny of new industrial or pollution sources near where you live. Where it isn't, this is the kind of policy that community groups and local governments may push for next, using this report as a resource.