California Sues Chiquita Canyon Landfill Over Toxic Contamination

California Attorney General Rob Bonta and the California Department of Toxic Substances Control filed a lawsuit on October 27, 2026, against Waste Connections and other owners and operators of the Chiquita Canyon Landfill. The legal action targets ongoing environmental contamination and repeated releases of hazardous liquids from the 639-acre landfill located in the Santa Clarita Valley of Los Angeles County.

According to state officials, a subsurface elevated temperature event that began around May 2022 has triggered the rapid breakdown of waste inside the landfill. Temperatures beneath the site have reached up to 260 degrees Fahrenheit, generating toxic fumes, odors, and millions of gallons of liquid waste known as leachate. State authorities state that the operators failed to manage these hazardous materials properly, leading to dangerous spills and leaks.

Details of the Landfill Violations

The state’s lawsuit details multiple violations of state hazardous waste laws. Officials note that an 8,000-gallon spill of hazardous leachate occurred on November 14, 2025, flowing into an unpermitted stormwater sedimentation basin. Subsequent heavy rainfall caused this basin to overflow in late December 2025, sending stormwater mixed with leachate into Castaic Creek and the Santa Clara River.

The landfill stopped accepting waste on January 1, 2025, after failing to obtain a required permit from the Los Angeles Regional Water Quality Control Board. The affected subsurface area has since expanded from an initial 20 acres to at least 90 acres, releasing dangerous chemicals including benzene and methyl ethyl ketone.

Impact on Local Communities

Several residential neighborhoods sit near the facility, including Val Verde, Halsey Canyon, Halsey Hills, North Bluffs, Live Oak, and Williams Ranch. The Val Verde community is located approximately 1,000 feet northwest of the landfill’s developed area. Thousands of residents, along with multiple local preschools, elementary schools, middle schools, and high schools, are located in the surrounding region.

State and federal agencies formed a Multi-Agency Critical Action Team in November 2023 to address the crisis. While various administrative actions, local lawsuits, and individual or class-action lawsuits have already been launched by residents and public bodies, the new state lawsuit introduces additional claims for civil penalties, disgorgement, and an abatement fund.

What This Means for Affected Residents

For individuals living near the landfill, the new lawsuit represents an escalation in government enforcement aimed at compelling cleanup and accountability. Families affected by dangerous conditions, toxic gases, and health impacts have previously pursued their own individual and class-action litigation. Residents monitoring the situation can watch for updates regarding proposed abatement funds or court-ordered remediation steps.

When dealing with complex environmental contamination, property damage, or health impacts from industrial sites, talking to a qualified lawyer may help affected community members understand their legal options for seeking relief.

This article is general information based on California Attorney General and court or agency records available at publication time. It is not legal advice; laws and deadlines differ by state and by case. Published October 28, 2026.