Minnesota Misses 2025 State Mercury Reduction Goal
The state falls short of its water safety target as regulators approve continued operations at two major taconite facilities.
Updated on Oct. 30, 2026 in Environmental
Live Poll
Should states mandate stricter pollution controls on local industrial plants even if companies claim it is infeasible?
Minnesota missed its 2025 goal to reduce mercury levels across 75% of state waters, a target set nearly two decades ago. The Minnesota Pollution Control Agency recently renewed air permits for two major taconite facilities without mandating additional pollution controls.
Why it matters
The failure highlights ongoing friction between industrial output and environmental benchmarks in Minnesota, particularly as regulators weigh the economic feasibility of emission controls against state health goals.
Taconite processing plants, which contribute more than half of the mercury emitted within Minnesota, currently lack the advanced capture equipment required to reach the state's 2007-era reduction benchmarks.
The players
Minnesota Pollution Control Agency
A state regulatory body responsible for managing air, water, and waste permits throughout Minnesota.
U.S. Steel
A major steel producer that owns the Minntac plant in Mountain Iron and the Keetac plant in Keewatin.
The details
The Minnesota Pollution Control Agency manages state air quality through site-specific permitting processes. During recent reviews for the Minntac and Keetac plants, owned by U.S. Steel, regulators declined to mandate new emission-control technology. U.S. Steel maintains that such equipment is currently infeasible and argues that mercury deposition from external, out-of-state sources constitutes a larger share of the total environmental load.
Timeline
2007: Minnesota establishes its mercury reduction benchmark for state waters.
2025: Minnesota fails to meet its established mercury reduction goal.
Recent months: MPCA reviews and renews air permits for local taconite facilities.
The Tech Race
This outcome represents a departure from the 2007 Minnesota mercury reduction benchmark, which sought to secure safer fish consumption across state waters. The decision to forgo new pollution controls sets the state further back from the technology deployment path needed to mitigate industrial mercury output.
Residents across the Iron Range and the wider state will not see immediate changes in industrial emissions following these permit renewals. The decision effectively maintains current air quality conditions near the Minntac and Keetac sites for the duration of the new permit cycles.
The takeaway
The state's failure to hit its 2025 mercury reduction target signals a persistent impasse regarding industrial emission controls in the taconite sector. Watch for future air permit renewal hearings as regulators and industry stakeholders adjust to the missed benchmarks.
Further reading
For broader context on state ecological standards, visit Minnesota Environmental.
Source note: This article includes information reported by Star Tribune.
Live Poll
Should states mandate stricter pollution controls on local industrial plants even if companies claim it is infeasible?
