Polluters in California now face a hard number for selenium discharge
What happened
US environmental regulators just set a new, specific limit for selenium pollution in California's freshwater. This means industries and municipalities discharging into these waters must now meet a stricter, measurable standard to protect fish and wildlife.
Why it matters
This rule replaces a more general guideline with a hard number for selenium. Companies that discharge into California's freshwater now have a clear, enforceable target to meet. This makes it easier for regulators to enforce clean water laws and harder for polluters to argue about compliance.
The signal
Watch for the first enforcement actions or permit renewals under this new standard, and how quickly industries adapt their discharge practices.