Sonoma County restricts use of Roundup, other synthetic pesticides
Sonoma County this week became the fourth local government agency in the country to restrict use of synthetic pesticides on public land, joining a wave of cities and counties across the nation that are banning a chemical deemed by some to cause cancer.
Santa Rosa, Windsor and Sonoma have previously precluded application of synthetic weedkillers on public property, with Sonoma specifically targeting glyphosate, the main ingredient in Roundup, the widely used herbicide manufactured by Monsanto.
At least 38 California cities and counties in California have now adopted bans on synthetic pesticides, along with jurisdictions in 22 other states from coast to coast, according to Baum, Hedlund, Aristei & Goldman, a Los Angeles-based law firm that has won three cases against Monsanto with $2.4 billion in damages.
The pesticide rebellion gained momentum in 2017, when glyphosate was added to California’s Proposition 65 list of cancer-causing chemicals.
Megan Kaun, a Sebastopol resident who developed the county measure in collaboration with Supervisor Lynda Hopkins, began her campaign in 2015 when she found out glyphosate was being sprayed on a playground near her former home in Santa Rosa. Last August, the city prohibited use of synthetic weedkillers at dozens of parks, buildings and medians.
Windsor banned synthetic pesticides from public property last year, and the town of Sonoma barred use of glyphosate in April.
The newest regulation applies to lands maintained by county agencies, including water, parks, roads and the open space district, requiring them to eliminate use of synthetic herbicides, insecticides and fungicides to the “maximum extent practicable.”
Those lands include about 12,000 acres in 57 parks, trails and marinas managed by Sonoma County Regional Parks and 1,386 miles of rural roads maintained by the Transportation and Public Works Department.
It is not an absolute ban, allowing pesticides for use on “targeted, specific weed infestations,” and the two agencies say they cannot immediately quit using synthetic pesticides. The transportation agency is about to launch a test of an organic herbicide called Weed Zap, said by its manufacturer to be 100 percent biodegradable with a “pleasant clove scent.”
The county policy bans use of synthetic pesticides on county agency campuses, sidewalks, plazas, playing fields, playgrounds and county-maintained libraries, as well as “no synthetic spray zones” to be determined this year.
It also requires annual reports on the amount and locations where pesticides are applied by county agencies, a step that Hopkins said assures transparency.
Private land is exempt from the rules. The county is prohibited from regulating pesticide use on private property, a county staff report said.
Johannes Hoevertsz, the county Transportation and Public Works director, said his agency is the major user of herbicides, spraying mainly on roadsides where it is difficult or impossible to mow.
No chemicals are sprayed near a water source or a public area such as a park, he said.
Hopkins’ west county supervisorial district, with 540 miles of roads, has been a virtual no-spray zone for years, Hoevertsz said.
“We are looking for ways to reduce costs and be safe at the same time,” he said, noting that mowing costs 10 times more than spraying.
At the county airport, spraying is needed to keep vegetation 5 feet from runways so pilots can see the lights, he said.