Orange County is facing intense scrutiny over its annual application of glyphosate-based herbicides across 147 different waterways to manage flood risks. Local environmental advocates and some county officials are now demanding an immediate end to the practice following reports of regulatory failures and ecological damage .
The 50,000-gallon footprint on the Santa Ana River
The scale of chemical application in Orange County is staggering, with activists reporting that between 30,000 and 50,000 gallons of RoundUp are sprayed on the Santa Ana River alone every year. According to the report, this treatment extends to 147 waterways annually, a volume of chemical use that has remained largely unchanged for at least a decade.
The OC Creek Team, led by founder Brent Linas, has documented the fallout through videos showing machinery pouring chemicals into ditches and channels. The group argues that these actions have decimated aquatic habitats, transforming once-vibrant streams filled with fish into sterile, "plastic-looking" corridors. Bethany Nelms, the chief operating officer of the OC Creek Team, has characterized the water-spraying as a deliberate act of environmental sabotage that puts residents and children at risk of daily exposure.
Invalid samples and the CalEPA audit
The controversy is compounded by evidence of administrative negligence within the Orange County government. An audit conducted by the California Environmental Protection Agency (CalEPA) and the Santa Ana Water Board revealed that the county's Public Works division failed to adhere to required monitoring standards.
As the report notes, these regulatory lapses included laboratory testing failures that resulted in invalid samples being erroneously reported as safe. while a spokesperson for Orange County leadership stated that the administration is currently reviewing two notices from the Santa Ana Regional Water Quality Control Board, critics maintain that the county continues to operate without sufficient oversight.
Supervisor Katrina Foley's push for a phased exit
Internal political pressure is mounting as some county leaders begin to question the necessity of chemical herbicides. Supervisor Katrina Foley has emerged as a key critic, inroducing a motion at a board meeting to begin a phased exit from herbicide use in favor of safer, evidence-based vegetation control methods.
The push for change is bolstered by the success of neighboring regions . Both Los Angeles and San Diego counties have reportedly stopped relying on glyphosate for waterway management and have successfully implemented revegetation strategies without increasing the risk of flooding. The OC Creek Team argues that Orange County should adopt these non-chemical strategies to prove that its infrastructure can handle natural vegetation flow.
The $18 billion shadow of Bayer and Monsanto
The local conflict in Orange County mirrors a global legal and scientific battle over the safety of glyphosate. The stakes are highlighted by the fact that Bayer and Monsanto have paid over $18 billion to settle claims from individuals who allege the chemical caused their cancer.
There remains a sharp divide in official classifications of the chemical. While the World Health Organization's research arm and California's 2017 legislation categorize glyphosate as a probable carcinogen, the United States Environmental Protection Agency (EPA) continues to certify it as safe when used according to directions. This discrepancy allows Orange County to maintain its EPA-authorized permits even as local residents voice health concerns.
What the county's transparency review has yet to reveal
Despite the county's commitment to transparency, several critical questions remain unanswered. It is still unclear why Orange County contractors have allegedly failed to adhere to state-approved vegetation management protocols, as claimed by Brent Linas of the OC Creek Team.
Furthermore , the county has not yet provided a detailed timeline for the "phased out" approach suggested by Supervisor Katrina Foley, nor has it clarified how it will rectify the laboratory testing failures flagged by CalEPA. Until the county addresses whether its infrastructure can truly support natural vegetation without compromising flood safety, the reliance on glyphosate is likely to remain a point of contention.
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