(Beyond Pesticides, August 20, 2020) Persistent organic pollutants (POPs), including banned and current-use pesticides are present in snow and ice on top of Arctic glaciers, according to the study, “Atmospheric Deposition of Organochlorine Pesticides and Industrial Compounds to Seasonal Surface Snow at Four Glacier Sites on Svalbard, 2013–2014,” published in Environmental Science & Technology. Past research finds that air contaminated with these environmentally bioaccumulative, toxic chemicals drift toward the poles, becoming entrapped in ice under the accumulating snowfall. As the global climate continues to rise and the climate crisis worsens, studies like this become significant, as glaciers encapsulating these toxic chemicals are melting. Upon melting, some chemicals can volatize back into the atmosphere releasing toxicants into air and aquatic systems, with the ensuing consequences. Although this research demonstrates that specific computer programs can track the trajectory of chemically contaminated air parcels with practical precision, it falls to global leaders to curtail the continued manufacturing of these chemical pollutants. [For related pieces, see Silent Snow: The unimaginable impact of toxic chemical use and DDT in Glacial Melt Puts Alaskan Communities at Risk.] Countless scientists consider Arctic environments to be “pristine,” void of direct chemical inputs from pesticides and other POPs. However, the Arctic has become a sink for […]

(Beyond Pesticides, June 17, 2020) The June 3 decision in a high-profile “dicamba case” — against the U.S. Environmental Protection Agency (EPA) and for the plaintiffs, a coalition of conservation groups — was huge news in environmental advocacy, agriculture, and agrochemical circles. The federal Ninth Circuit Court of Appeals vacated EPA’s 2018 conditional registration of three dicamba weed killer products for use on an estimated 60 million acres of DT (dicamba-tolerant through genetic modification/engineering) soybeans and cotton. There is, however, a related issue that accompanies this and many other pesticide cases. When EPA decides to cancel or otherwise proscribe use of a pesticide (usually as a result of its demonstrated toxicity and/or damage during litigation), the agency will often allow pesticide manufacturers to continue to sell off “existing stocks” of a pesticide, or growers and applicators to continue to use whatever stock they have or can procure. Beyond Pesticides has opposed, covered, and litigated against this practice. To greenlight predictable harm is a violation of any recognized moral code, never mind of the agency’s mission — “to protect human health and the environment.” According to Beyond Pesticides, EPA should never permit continued use of a dangerous pesticide once that compound’s […]

(Beyond Pesticides, May 21, 2020) Use of the herbicide dicamba increases humans’ risk of various acute and chronic cancers, according to research published in the International Journal of Epidemiology by the National Institutes of Health (NIH). Many pesticides are “known or probable” carcinogens (cancer-causing agents), and their widespread use only amplifies chemical hazards, adversely affecting human health. However, past research lacks comprehensive information regarding human health effects associated with long-term pesticide use. This study highlights the significant role that long-term research plays in identifying potential health concerns surrounding registered pesticides, especially as the Environmental Protection Agency (EPA) plans to reaffirm its decision to allow dicamba use on genetically engineered (GE) crops. Nathan Donley, Ph.D., a scientist with the environmental health program at the Center for Biological Diversity, comments: “This sweeping study exposes the terrible human cost of the EPA’s reckless decision to expand the use of dicamba. […]For the EPA to approve widespread use of this poison across much of the country without assuring its safety to people and the environment is an absolute indictment of the agency’s persistent practice of rubber-stamping dangerous pesticides.” Dicamba—a benzoic acid chemical that controls broadleaf weeds—is one of the most widely applied herbicides in corn production. As a result of weed resistant to […]

(Beyond Pesticides, April 23, 2020) Pesticide spray drift from adjacent farmlands expose butterfly larvae to lethal pesticide concentrations, according to research published in Environmental Toxicology and Chemistry by Iowa State University (ISU). Lack of previous experimental pesticide toxicity data makes it unclear as to what degree insecticides impact monarch butterfly (Danaus plexippus) productivity in milkweed (Asclepias spp.) habitats near pesticide-treated pasture. This study adds weight to the idea that pesticides are playing a role in the ongoing decline of this iconic butterfly, as researchers find insecticide drift from adjacent fields to be strongly associated with larval mortality. Future monarch butterfly conservation efforts should consider risks stemming from pesticide exposure when developing butterfly rehabilitation efforts, according to advocates. As co-author Niranjana Krishnan (ISU graduate student) states, “In order to make the best decisions about how and where to plant milkweed, we first need to find basic toxicity and exposure data.”  ISU researchers established monarch butterfly colonies by collecting larvae from roadside milkweeds, which they then reared in the laboratory for incubation. To analyze the relative toxicity of various insecticides on monarch butterflies, researchers applied normal field-application rates of each pesticide at different larval development stages. Scientists used a bioassay to measure the […]

(Beyond Pesticides, April 7, 2020) Last week, the U.S. Environmental Protection Agency (EPA) registered a carcinogenic herbicide for new uses without following  the required public notification and comment process, the Midwest Center for Investigative Reporting (MCIR) reports. The chemical in question, isoxaflutole, is a broadleaf weedkiller that can now be applied to genetically engineered (GE) soybeans in half of U.S. states. Health and environmental groups are outraged by EPA’s furtive move, accusing the agency of colluding with the pesticide industry. “Clearly no one from the public health community knew about this because no one commented,” said Nathan Donley, PhD, of the Center for Biological Diversity to MCIR. “Yet there was all these industry comments, all these positive comments. Someone was tipped off that this docket had been opened. One side was able to comment, the other wasn’t.” Without public notification, only 54 comments were received. In its decision document, the agency touted how most of the input “were generally in favor of the decision to register the new use.” When questioned about its move, EPA simply told MCIR that it “requested public comment on the proposed registration decision.” The Federal Register provides the public notice of a proposed rulemaking by […]

(Beyond Pesticides, February 28, 2020) State legislators in Boise, Idaho have advanced House Bill 487, An Act Relating to Pesticides and Chemigation, out of the House Agricultural Affairs Committee. If passed, the statutory alterations in this bill would, according to the Idaho Statesman, loosen some rules on aerial application by crop-dusting airplanes, and reduce state agricultural investigators’ ability to regulate the spraying of pesticides. The legislation replaces sections of current rules and deletes language regarding drift, including “Chemicals shall not be applied when wind speed favors drift beyond the area intended for treatment or when chemical distribution is adversely affected.” Such changes will exacerbate the already-significant issue of pesticide drift. In an overview of the pesticide dicamba, Beyond Pesticides recently reported on this legislative development, as well as on a precipitating exposure event in an Idaho hops field. Banning of aerial spraying, as has been attempted by some localities, would go a long way toward eliminating the harms of pesticide drift. The only conclusion that can be drawn from this is the following: As the problem of drift grows and farmers’ crops and people are put at risk, this legislation attempts to define away serious problems and eliminate protections. The Idaho […]

(Beyond Pesticides, February 6, 2020) Bill Bader, a Missouri peach farmer, is taking on agrichemical giants for damages to his crops, allegedly caused by the volatile herbicide dicamba drifting from neighboring properties. Mr. Bader says that not only did he lose over 30,000 trees, his remaining peaches are now smaller and his trees are less productive. According to Bader, the damage has cost him $20.9 million for which he seeks restitution. The case is claiming that Monsanto, now owned by Bayer, and German partner company BASF knew that the sale of their products would result in crop damage due to drift, but sold dicamba-resistant cotton and soybean seeds anyway. The companies deny the claims. Dicamba is a benzoic acid herbicide that exerts an auxin-like growth regulatory effect when absorbed by plant tissue, ultimately causing the plant to outgrow its nutrient supply and die. Originally developed in the 1950’s, dicamba has become more popular as crops become resistant to glyphosate. It is extremely volatile and prone to drift. Soybeans are particularly sensitive to dicamba, and drift damage can pit neighbor against neighbor in rural communities. Risk of crop damage alone can drive farmers to buy dicamba-resistant soybean seeds. In addition to […]

(Beyond Pesticides, September 13, 2019) A study on the use of the herbicide dicamba’s off-target effects finds broad impacts, in both geographic spread and the variety of affected species, with use of the weed killer on Arkansas cropland putting birds at risk in agricultural landscapes. Audubon of Arkansas is reporting results of its community science dicamba monitoring project, conducted under the direction of Bird Conservation Director Dan Scheiman, PhD, and launched in late spring 2019. The project monitored dicamba symptomology in species on municipal, state, and federal lands, where dicamba was not applied, but where its impacts were nonetheless detected. Arkansas Audubon “predicts that in a landscape full of GMO crops [genetically modified organisms] (on which dicamba is typically used), the atmospheric loading of volatile dicamba could be enough to cause landscape scale damage to our state natural areas, wildlife management areas, national wildlife refuges, family farms, and the wildlife they harbor.” Dicamba herbicides are volatile compounds used to control broadleaf weeds — especially on fields of GMO soybean and cotton crops that have been genetically engineered for resistance to dicamba. These herbicides damage non-GMO crops and native plants well beyond intended application areas. (In 2017, more than 3 million acres of […]

(Beyond Pesticides, May 16, 2019)  Use of the tree-killing herbicide aminocyclopyrachlor (ACP) is now restricted in Oregon, according to rulemaking finalized last week by the state’s department of agriculture (ODA). While an important step in the right direction, many environmentalists are perplexed by the state’s decision not to proceed with a ban on all uses of the inherently toxic chemical, which has killed thousands of old-growth pine trees along state scenic highways. Over five thousand comments from Oregonians and concerned individuals across the country urged ODA to scrap its convoluted proposed rule and simply eliminate the chemical from state commerce. While advocates will continue to urge ODA to completely eliminate ACP use, the current restrictions did not come without a fight. Public meetings were attended by representatives from the chemical’s manufacturer, Bayer. The company strongly opposed any restrictions on its product, and acted to delay the original implementation date for ODA’s rule. Oregon had intended to finalize the rule in late March. “We were pretty much set to file the final paperwork,” said Oregon pesticide program manager Rose Kachadoorian to The Bulletin. But through the work of its corporate lawyers, Bayer was able to track down an arcane Oregon law that […]

(Beyond Pesticides, February 11, 2019) Aminocyclopyrachlor (ACP) is a tree-killing pesticide masquerading as a broadleaf herbicide. The Oregon Department of Agriculture (ODA) has the opportunity to lead the country in banning this inherently dangerous chemical. According to ODA, nearly 1,500 dead or dying trees have been reported along Oregon’s iconic Interstate 20, home to old growth ponderosa pines. Many of these 150- to 300-year old trees are now dead from ACP exposure. ODA indicated that “because [ACP] is a relatively new herbicide it is unknown how many trees stressed from past applications of [ACP] will die in the future.” Even at tiny levels, ACP run-off and drift kills trees. Tell Oregon’s Department of Agriculture to lead the country in completely banning its use. In 2014, DuPont chemical company settled a nearly $2 million lawsuit with the U.S. Environmental Protection Agency (EPA) after the herbicide (under the brand name Imprelis®) was found to kill trees at golf courses, homeowners associations, businesses, and private residences. Despite this history, regulators left ACP on the market. Its use was banned on lawns and turfgrass, but allowed for roadside rights-of-way. A couple years ago, Bayer purchased the rights to ACP from DuPont and continues to market […]

(Beyond Pesticides, December 21, 2019) A study at the University of Maine (UMaine) finds that adding blackberry leaf litter in stormwater catch basins creates an “ecological trap,” enticing mosquito females to lay eggs in sites unsuitable for larvae survival. Employing this new and incredibly viable “attract-and-kill’ tool for mosquito control shows potential for preventing the breeding of mosquitoes that may carry insect-borne diseases, especially in urban environments. Stormwater catch basins regularly accumulate leaf litter, which serve as habitat for the mosquito species Culex pipiens (Cx. Pipiens) that may carry West Nile virus. Previous University of Maine research discovered decomposing leaf litter from Amur honeysuckle (Lonicera maackii) and common blackberry (Rubus allegheniensis) produces chemical compounds that attracts and stimulates Cx. Pipiens female to oviposit, or lay eggs. Investigating the attractiveness and lethality of varying catch basin conditions to mosquitoes, researchers hypothesized that blackberry leaf litter could be shown to be lethal to developing mosquito larvae, and, therefore, act as a natural ecological trap for Cx. Pipiens. Five varying treatments were applied to a total 50 catch basins. Treatments included (1) all debris dredged weekly throughout the duration of the study, (2) no change to debris naturally occurring in catch basins, (3) […]

(Beyond Pesticides, December 12, 2018)  Costa Rica is currently experiencing exponential growth in its banana and pineapple farming industries and with it an increase in intensive pesticide applications. Recent studies in Costa Rica identified evidence of increasing fur discoloration in black mantled howler monkeys ((Alouatta palliata) as a result of their exposure to sulfur-based pesticides. Coloration in Howler monkeys are limited to black, gray, and dark brown, but researchers found several monkeys with yellow patches on their tails and legs. The change in pigmentation is directly correlated to the consumption of plants inadvertently exposed to sulfur-based pesticides sprayed at (and drifting from) nearby farms. The use of pesticides is not only hazardous to nearby wildlife, but communities as well. It is an issue that seems to play out repeatedly both in Costa Rica and in the U.S. The use of pesticides, and more importantly pesticide drift, continues to be a pervasive issue with severe human and environmental health consequences. Pesticide drift occurs in the form of mist, particles, or vapor (gas) and are usually carried by air (and oftentimes water) currents. Typically, fumigants (gaseous pesticides) are most likely to drift.  When used, pesticides regularly spread further than the established application […]

(Beyond Pesticides, November 27, 2018) The U.S. Environmental Protection Agency (EPA) ignored the input of an expert weed scientist on the controversial herbicide dicamba, bending to Bayer’s Monsanto and the pesticide industry, according to emails obtained by the Arkansas Democrat and Chronicle (ADC) through a Freedom of Information Act request. The scandal centers on the recent re-approval of the pesticide, a highly volatile and drift-prone herbicide that has become a serious problem for many farmers and state regulators. As top-level EPA officials continue to work with industry to subvert their own agency’s scientific findings, more and more consumers are moving to organic products in order avoid the pesticide risks government regulators ask consumers to accept. Emails ADC received indicate that Jason Norsworthy, PhD, a weed scientist with the University of Arkansas, worked closely with Bayer’s Monsanto in conducting field trials this past summer, but found high volatility and drift of the company’s new dicamba-based herbicide XtendiMax. The product was developed in the face of widespread resistance to glyphosate-based herbicides in genetically engineered (GE) farm fields. However, recent accounts from farmers in the south and midwest indicate that, not only is the switch to dicamba unhelpful  in eliminating drift and reversing escalating weed resistance, its […]

(Beyond Pesticides, November 21, 2018) A study published last month in the Journal of Apicultural Research finds significant numbers of U.S. honey bees at risk after exposure to hazardous synthetic pesticides intended to control mosquitoes. With many beekeepers rarely given warning of insecticide spraying, researchers say the risk of losing colonies could increase. Advocates say fear of Zika and other mosquito-borne illnesses could result in counterproductive and reactionary insecticide spraying that will add further stress to managed and native pollinators already undergoing significant declines. Researchers aimed to determine whether neighboring honey bee colonies could be similarly affected by aerial insecticide spraying. To calculate the percentage of colonies that could be affected, density of honey bee colonies by county was compared with projections of conditions thought to be prone to regional Zika virus outbreaks. Researchers found 13 percent of U.S. beekeepers at risk of losing colonies from Zika spraying. In addition, it was determined that many regions of the U.S. best suited for beekeeping are also those with favorable conditions for Zika-prone mosquitoes to proliferate. These regions include the southeast, the Gulf Coast, and California’s Central Valley. “[Considering] all the threats facing bees,” says study lead author Lewis Bartlett of the […]

(Beyond Pesticides, November 8, 2018) Two months after publishing its first series of tests, part two of an Environmental Working Group (EWG) study finds residues of Roundup’s active ingredient, glyphosate, in all General Mills’ Cheerios and PepsiCo’s Quaker Oats products sampled. Health advocates are expressing concern about the consequences of chronic glyphosate exposure, and say U.S. federal agencies must limit the herbicide’s use on oat-based breakfast foods regularly marketed to children. In addition, organic itself is under threat, as chemical-intensive management practices undermine the future of the growing organic movement. In this second round of testing, EWG scientists purchased products around San Francisco and Washington DC. 28 samples of conventional and 16 samples of organic oat products were collected. Approximately 300 grams of each General Mills and PepsiCo product were packaged and shipped to Anresco Laboratories, in San Francisco. Detected glyphosate residues were compared to EWG’s own health benchmark of 160 parts per billion (ppb). This benchmark is based on risks of lifetime exposure and what EWG scientists consider allowable and protective of children’s health with an adequate margin of safety.  EWG’s results detected glyphosate residues in all 28 samples of conventionally grown oat products. The vast majority (all but two) […]

(Beyond Pesticides, July 26, 2018) A legal complaint filed by a Kansas farmer claims industry giant, Monsanto, knew its new dicamba-formulated product would harm other crops, but marketed and sold it anyway, damaging thousands of acres of crops. The lawsuit, filed by 4-R Farms based in Corning Kansas, lost over 200 acres of soybeans. This is the latest in a string of lawsuits Monsanto is facing. Farmers in Arkansas, Missouri, and elsewhere have been hit with crop losses as a result of the dicamba damage. Advocates  and victims of damage argue that Monsanto places profits ahead of possible damage to crops when it markets seeds resistant to a powerful weedkiller before making a less volatile herbicide available. This, according to the lawsuit filed in court. The petition, filed last week, could be the catalyst for a class action lawsuit of Kansas farmers against Monsanto, which faces a growing docket of legal challenges. The lawsuit also names chemical company BASF as a co-defendant. BASF is facing its own mounting pile of lawsuits over dicamba. The lawsuit requests unspecified damages and a trial by a federal jury in Topeka. Monsanto marketed its new line of dicamba products, Xtend, to go hand in hand with […]

(Beyond Pesticides, April 4, 2018) In late March, the Missouri Department of Agriculture hosted a public hearing to discuss a proposed emergency rule restricting the sale and use of the herbicides dicamba and 2,4-D – which are known for their ability to drift off-site and damage sensitive crops. The emergency rule was introduced to prevent off-label use of specific dicamba or 2,4-D products. Thus far, dicamba is responsible for damaging approximately 325,000 acres of soybeans in the state last year. The proposed rule will stop sales of the herbicides dicamba and 2,4-D between April 15 and October 1 in Missouri. The department’s goal is to prevent off-label pesticides from drifting onto neighboring property and damaging other crops. According to the department, if it chooses to pursue an emergency rule, it could become effective as soon as April 1, 2018, and expire 180 days later. The rule also requires registrants to provide a sales record by April 30 for each pesticide sold between October 1 and April 15. A proposed rule will be filed at the same time as an emergency rule to initiate the formal rulemaking process. The draft rule language reads as follows: Pesticides that meet the conditions of this section are […]

(Beyond Pesticides, February 23, 2018) Agrichemical corporation Monsanto has lost its bid to halt a statewide ban on the use of its specialty dicamba herbicide in Arkansas. Despite a lengthy process of evaluation and public comment that led to a prohibition on the use of drift-prone dicamba herbicides during the growing season on Arkansas farms, Monsanto made one last-ditch attempt to stop the law from going into effect by suing the entire state. With the industry’s loss, Arkansas is on track to implement the toughest restrictions against dicamba in the U.S. State Circuit Court Judge Chris Piazza dismissed the lawsuit last week based on a recent Arkansas Supreme Court ruling, which held that the state cannot be made a defendant in court. Monsanto’s lawsuit argued against the makeup of the state’s Plant Board, which voted to prohibit the company’s product last November. Monsanto also made claims that the state did not consider the economic damage a ban on the herbicide would cause, despite not seeking monetary restitution in court. Beyond Pesticides led a nationwide campaign to urge action by the Arkansas Plant Board to ban dicamba. Dicamba is an herbicide originally registered for use in 1967 to control broadleaf weeds. […]

(Beyond Pesticides, January 17, 2018) The organophosphate insecticides chlorpyrifos, malathion, and diazinon are likely to jeopardize the continued existence of endangered species and adversely modify their critical habitats, according to the newly released report from the National Marine Fisheries Service (NMFS). The insecticide cholorpyrifos, whose ban was rescinded by the Trump Administration last year, despite overwhelming evidence of neurological and brain damage to children, is once again being shown to be too toxic for continued use. Under Section 7 of the Endangered Species Act (ESA), any agency action requires a finding that it “is not likely to jeopardize the continued existence of any endangered species or threatened species or result in the destruction or adverse modification of habitat.” The December 31, 2017 Biological Opinion from NMFS followed an ecological assessment that relied upon multiple lines of evidence to determine effects to species and their designated habitats. These include “the direct and indirect toxicity of each chemical to aquatic taxa groups (e.g. fish, mammals, invertebrates); specific chemical characteristics of each pesticide (e.g. degradation rates, bioaccumulation rates, sorption affinities, etc.); expected environmental concentrations calculated for generic aquatic habitats; authorized pesticide product labels; maps showing the spatial overlap of listed species’ habitats with pesticide use areas; […]

(Beyond Pesticides, January 8, 2018)  With a long-documented history of children’s exposure to pesticides that drift from agricultural fields to school yards, California’s new regulations establishing no-spray buffers took effort January 1, as labor and public health groups acknowledged the progress and inadequacy of the measure. The new rule, DPR 16-004 Pesticide Use Near Schoolsites, adopted by the California Department of Pesticide Regulation (DPR), prohibits many pesticide applications within a quarter mile of public K-12 schools and licensed child day-care facilities during school hours, Monday through Friday between 6 a.m. and 6 p.m. This includes all applications by aircraft, sprinklers, air-blast sprayers, and all fumigant applications. In addition, most dust and powder pesticide applications, such as sulfur, will also be prohibited during this time. The new rule was announced in November, 2017. Advocates say the new rules fail to address persistent low-level exposures associated with the use of the pesticides near schools, which are in agricultural areas that are disproportionately Latino and from farmworker families. There is continuing concern about children’s exposure to hazardous pesticides because children use school grounds after school hours and on weekends and residues from drift may remain on school grounds. Many pesticides used are persistent and systemic, lingering […]

(Beyond Pesticides, December 4, 2017) You told the Arkansas Plant Board to exercise its authority to protect farmers, consumers, and the environment from use of the herbicide dicamba on genetically engineered (GE) soybeans, and the board listened. Now, we need to ask the board to stop the use of 2,4-D on GE cotton. The action of states is critical as the federal government ignores basic safety concerns. Action in Arkansas will influence other states. Tell the Arkansas Plant Board to adopt the proposed rule and to prohibit use of 2,4-D on cotton! The decision concerning 2,4-D use on herbicide-tolerant cotton goes to the Arkansas Plant Board on December 12. The choice has many similarities to the decision to allow — and then prohibit — the use of dicamba on herbicide-tolerant soybean varieties. Both 2,4-D and dicamba are phenoxy herbicides — 2,4-D being the infamous ingredient (along with 2,4,5-T) of Agent Orange. Our voices were heard when the Arkansas Plant Board considered dicamba, so please weigh in on 2,4-D. At this December 12 meeting, the Arkansas Plant Board is holding a hearing on a proposed regulation that would allow the Board to request more information from pesticide registrants, which could support restrictions based on conditions within Arkansas. The […]

(Beyond Pesticides, October 20, 2017) Last week, the U.S. Environmental Protection Agency (EPA) announced that label changes to the herbicide dicamba would be made to try to minimize drift that has left thousands of acres of crops already damaged this season. The label changes include making dicamba “restricted use,” which allows only certified applicators to apply the chemical. Dicamba drift has been damaging farmers’ crops for at least two years due to the approval of new dicamba-tolerant genetically engineered (GE) crops. Advocates says that the new changes do not ensure that drift will be eliminated. According to EPA, the agency reached an agreement with the makers of dicamba, (Monsanto, BASF and DuPont) to restrict its application. This comes after hundreds of official complaints of crop damage related to dicamba across 17 states this year alone, leading to questions about the new formulation of the chemical used in genetically engineered (GE) crop productioon. New GE crops developed by Monsanto must be paired with specific formulations of dicamba, and thus led to a vast increase in dicamba use over the past couple growing seasons. Dicamba-based herbicide use has climbed dramatically as farmers have adopted, especially, Monsanto’s GE soybean seeds; in the 2017 season, 20 […]

(Beyond Pesticides, August 29, 2017) Air monitoring in Kern County, California, finds levels of the highly neurotoxic pesticide, chlorpyrifos, in excess of the levels of concern established by the U.S. Environmental Protection Agency (EPA) for pregnant women. Chlorpyrifos is linked to low IQs, autism and other developmental neurological effects. Earlier this year, EPA Administrator Scott Pruitt refused to ban chlorpyrifos to the dismay of many scientists, medical professionals, and farmworker organizations. The California Department of Pesticide Regulation (CDPR) released its 2016 air monitoring data where it was revealed that chlorpyrifos air concentrations for a one-month period at the air monitoring site on the campus of Shafter High School in Kern County was 39.4 nanograms per cubic meter (ng/m3) – more than 18 times higher than EPA’s level of concern for pregnant women (2.1 ng/m3).  Shafter High School is some distance from fields in an area where chlorpyrifos use is not as high as in other parts of Kern County or elsewhere in California. More than 1.1 million pounds of chlorpyrifos was used in California in 2015, and more than a quarter of that is used in Kern County. High chlorpyrifos levels at a school means that children and unsuspecting teachers and […]