Glyphosate Is in Orange County's Creeks. Here's What Actually Keeps It Out of Your Glass.

It started with a video. Orange County Public Works has sprayed San Juan and Trabuco Creeks with glyphosate-based herbicides 10 to 20 times a year since at least 2013, under a permit that expired in 2018 and has been running in "administrative effect" ever since. When footage of the spraying started circulating this year, residents who'd never been told it was happening packed a town hall hosted by County Supervisor Katrina Foley: more than 200 people, organized in part by the local Creek Team coalition and Surfrider Foundation's South Orange County chapter. Foley agreed on the spot to halt spraying in both creeks and add third-party oversight to the county's pest management plan.

That's a real win, but creeks don't stay in their creeks. San Juan Creek runs straight to the ocean at Doheny State Beach, and along the way it's part of the same groundwater and surface-water system that feeds municipal wells and backyard water tables across the county. Zoom out and the picture gets bigger: glyphosate now turns up in 94% of streams and rivers tested nationwide, carried by ordinary agricultural and residential runoff. It's one of the most-used herbicides in the country, and that isn't about to change. A February 2026 federal executive order directed agencies to ramp up domestic glyphosate production specifically to protect the supply chain that keeps it in fields, parks, and county-maintained creeks for years to come.

By the numbers. 10 to 20 herbicide applications a year on San Juan and Trabuco Creeks since 2013. 94% of U.S. streams and rivers tested carry detectable glyphosate. 99%+ of glyphosate removed by a properly sized reverse osmosis system.

The EPA's limit is 700 parts per billion, but that's a legal ceiling, not a health target. It hasn't moved in years even as the research has. Some states, including Minnesota, have proposed cutting the acceptable level nearly in half, and long-term glyphosate exposure has been linked in various studies to neurological and hormonal effects, several cancers, and reproductive and metabolic concerns. None of that means Orange County tap water is unsafe by the letter of the law. It means the letter of the law is a floor, not a guarantee, and the practical fix isn't waiting on a future rulemaking, it's controlling what actually reaches your glass today.

Why reverse osmosis is the gold standard. Not every filter does the same job. A whole-home carbon and sediment system is built to handle everything that touches your house: the chlorine and chloramine smell, sediment, and the scale-forming hardness minerals that dry out skin and fog glassware. It's the right tool for volume, and it does real work against dissolved organics along the way. But glyphosate is a small, water-soluble molecule, and getting it out completely takes a finer filter than carbon media alone can guarantee. Carbon can pull out a meaningful share, but its performance against glyphosate specifically varies from system to system.

Reverse osmosis closes that gap. An RO membrane is built with pores measured in fractions of a nanometer, small enough to physically block dissolved pesticide molecules rather than just adsorb what happens to stick to carbon. Testing on RO systems has shown glyphosate removal rates above 99%, and coverage of the 2026 order points to the same pairing we install as standard: reverse osmosis at the point of use, backed by whole-home carbon filtration for everything upstream of it.

The whole-home stage protects the house. The reverse osmosis stage, right at your kitchen tap, is what protects what you actually drink and cook with. Which is why every whole-home system we install includes an RO unit, not as an upsell, but as the piece that finishes the job.

That's the same logic behind the systems and free reverse osmosis unit that come standard with our installs: size the whole-home system to your actual water test, then let RO handle the fine work carbon can't guarantee on its own. It's the difference between water that smells and feels better and water that's actually been tested against what's now showing up 20 minutes upstream.

Know what's actually in your water. We test at your tap, not off a zip-code average, and size the system to what we find. Book a water test or email conner@originwaterco.com.

Sources and further reading. Surfrider Foundation, South Orange County Chapter: "What the Creek? Herbicides and Community Outcry Upstream of Doheny Beach" (southoc.surfrider.org). LivingWhole: "Does Reverse Osmosis Remove Glyphosate?" (livingwhole.com.au). SpringWell Water: "What the 2026 Glyphosate Order Could Mean for Your Water & Health" (springwellwater.com).