The environmental fight that played out inside the Supreme Court on Wednesday was unusual in many ways: It featured poop, a whopping $10 billion fine and one of the nation’s greenest cities — San Francisco — battling the Environmental Protection Agency over water pollution rules in a case that could reverberate beyond the Bay Area.

The court’s conservative justices grilled EPA over requirements included in a permit for the city’s wastewater treatment plant.

One of the nation’s most liberal enclaves ran into pushback from the liberal wing of the Supreme Court on Wednesday as San Francisco battled the EPA over how the city’s wastewater spills into the Pacific Ocean.