United States air monitoring declines amid legislative efforts to restrict community data

Public air monitoring capabilities in the United States are declining due to reduced federal funding, a decrease in the number of monitors, and aging equipment. This decline occurs as environmental risks such as wildfire smoke, data center pollution, and heat-driven ozone levels increase.

As official monitoring weakens, many communities have adopted low-cost sensors to track air quality. However, industry-backed legislative efforts in states including Louisiana, Ohio, and Kentucky are seeking to restrict the use of this community-collected data. These bills aim to prevent regulators from using any data for enforcement actions unless it meets specific EPA-approved standards.

While proponents argue that community sensors lack the reliability required for regulatory enforcement, internal communications suggest industry resistance to even more stringent accuracy requirements. For example, an official at Chemours expressed concern that a West Virginia bill designed to ensure sensor accuracy would “essentially codify what we are trying to prevent.”