A federal lawsuit accusing the Lake Tahoe Visitors Authority of polluting the lake with debris from Fourth of July and Labor Day fireworks says the authority and its contractor should be subject to up to $75 million in fines for thousands of violations of the Clean Water Act over five years.

Joseph and Joan Truxler of Zephyr Cove insist their suit is not intended to halt the spectacular, boat-launched displays that have wowed large crowds for three decades.

But they're frustrated by what they say is LTVA's indifference, and state and U.S. regulators' failure to protect the lake from debris and chemical pollutants.

The LTVA has until Feb. 10, to respond to the suit.