The Elem Pomo are one of several bands of Pomo people indigenous to the Clear Lake basin, the largest natural freshwater lake entirely within California. For at least 6,000 years -- and possibly as long as 14,000, based on artifacts found on nearby Rattlesnake Island -- the Elem lived along these shores, fishing for the lake's abundant species, gathering tule reeds and acorns, and holding ceremonies on the islands that dotted the northern reaches of the water. Rattlesnake Island, roughly 500 feet offshore from what is now the reservation, served as a burial ground, a ceremonial center, and a political gathering place. Five documented village sites once occupied the island, along with dance houses and cremation pits. The Elem consider it their place of origin. Today, the tribe is fighting to regain ownership of the island, where they held ceremonies for centuries before colonization severed that connection.

The Sulphur Bank Mine began as a sulfur operation in the 1860s before transitioning to mercury extraction. For nine decades, it produced mercury from cinnabar ore, leaving behind open pits, waste rock piles, and contaminated tailings that leached heavy metals into the surrounding soil and groundwater. When the mine shut down in 1957, the EPA did not yet exist. The waste sat untouched for decades, slowly migrating into Clear Lake. Elemental mercury transformed into methylmercury through bacterial processes in the lake sediment -- a potent neurotoxin that accumulated up the food chain into the flesh of fish the Elem had always relied on for sustenance. The EPA designated Sulphur Bank a superfund site in 1990. Early cleanup efforts removed up to 18 inches of contaminated soil from 17 residential yards on the reservation and replaced it with clean fill. But the deeper problem -- the millions of cubic yards of mine waste along the shoreline -- persisted for decades longer.

The contamination reshaped daily life on the reservation in ways that outsiders rarely see. Fish advisories, first issued in 1987 and updated repeatedly, warned against eating species that the Elem had consumed for generations. Tribal members who continued traditional fishing practices showed blood mercury levels far above the national average. According to Elem Colony Chairman Augustine Garcia, several tribal members died of kidney and liver failure -- people who never drank but consumed large quantities of fish from the lake. The contamination did not just threaten physical health. It severed cultural practices. Fishing, gathering shellfish and aquatic plants, conducting ceremonies near the water -- these were not recreational activities but expressions of identity stretching back thousands of years. When the water and the food it provides become dangerous, an entire way of life is undermined. In 2023, the EPA finally issued its plan to clean up the mine and residential soils, more than three decades after the superfund designation.

The Elem Indian Colony was formally organized as a tribe in 1936 and received its reservation -- originally called the Sulfur Bank Rancheria -- in 1949. Today, tribal headquarters are in Lower Lake, California. The colony sits between the small towns of Clearlake Oaks to the north and Clearlake to the south, served by the Konocti Unified School District. These are modest facts for a community that has endured colonization, enslavement, massacre, forced labor, disease, land theft, and environmental poisoning across two centuries. The Elem lost approximately 80,000 acres of traditional territory around Clear Lake. What they received in return was 50 acres adjacent to a toxic mine. That they remain here -- organized, federally recognized, still pressing their claim to Rattlesnake Island, still advocating for cleanup of the land that was supposed to be their refuge -- is not a feel-good story. It is a testament to a persistence that should not have been necessary.