When parents at Crocker/Riverside Elementary have raised concerns about the proposed artificial turf installation, the district has consistently pointed to one example: John F. Kennedy High School. JFK has olive pit infill turf. According to Assistant Superintendent Chris Ralston, “the feedback from staff and students there has been positive, particularly regarding safety and heat performance.”
There’s a problem with that comparison. JFK High School is not Crocker/Riverside Elementary. The students aren’t the same age. The bodies aren’t the same size. The exposures aren’t the same. And the medical and developmental literature is unambiguous that what is acceptable for adolescents is not automatically acceptable for young children.
This article walks through what the district is glossing over when it equates an elementary school decision with a high school precedent.
They are not the same children
JFK High School serves students aged 14 to 18. Crocker/Riverside Elementary serves students aged 5 to 11.
These are not minor differences. They are different developmental categories with different physiological exposures, different behaviors on a playing surface, and different vulnerability profiles. The district’s facilities administrator has acknowledged this in writing himself. On March 25, 2026, in response to a parent question about the OEHHA artificial turf safety study, Ralston wrote that the study population “is not the same to compare” with elementary-age children — because elementary children “are closer to the ground.”
He was right. He just hasn’t applied that same reasoning to his own JFK comparison.
Why “closer to the ground” matters
Younger children sit on playing surfaces, lie on them, roll on them, and put their hands directly on them throughout the day. They then put those hands in their mouths. This is not an occasional behavior — it is the developmental norm for elementary-age children.
Adolescents at a high school field, by contrast, are typically standing, running, or seated on benches. Hand-to-mouth contact with the playing surface is rare. The same field produces dramatically different exposures depending on the age of the child using it.
This is why public health research consistently treats children under 12 as a distinct population requiring separate study. The exposure pathways are different. The dose-per-body-weight is different. The behavior is different.
Why body size matters
A 6-year-old weighs about 45 pounds. An 18-year-old weighs about 150 pounds. Any chemical exposure measured in dose-per-kilogram delivers a substantially higher per-body-weight dose to the smaller child for the same level of contact.
This is a basic principle of pediatric toxicology, and it is why the EPA, FDA, and CDC routinely require separate analysis for children under 12. A finding of “no observed adverse effect” in adolescents and adults does not transfer to elementary-age children. It has to be studied separately.
That separate study has not been done for olive pit infill at any age group, let alone elementary-age children.
Why developing systems matter
Children’s respiratory systems, immune systems, and endocrine systems are still developing through childhood. Elementary-age children are in critical windows for lung development. They breathe more air per pound of body weight than adults. They are more vulnerable to environmental toxins, allergens, and irritants because their systems are still being calibrated.
Adolescents, while not fully developed, are past most of the critical windows for organ-system development. The exposures that an adolescent body can buffer can produce different effects in a child whose lungs are still growing.
Why heat hits children harder
Children are more vulnerable to heat illness than adolescents and adults. The American Academy of Pediatrics has been explicit on this point: “Because of their unique physiology, children are more susceptible to temperature extremes and their health effects. Children are less able to regulate their body temperature compared with adults. As a result, children are more likely to develop significant health effects when they are exposed to environmental temperature extremes.” Santa Monica Daily Press
That isn’t a soft policy preference. It’s pediatric physiology. Children produce more metabolic heat per body mass, sweat less efficiently, and have a higher surface-area-to-volume ratio that causes them to absorb heat from their environment more rapidly than adults do.
The numbers on artificial turf surface temperatures are not in dispute. Penn State University’s Center for Sports Surface Research found that maximum surface temperatures during hot, sunny conditions averaged from 140°F to 170°F. CalMatters A separate study at Brigham Young University recorded a high of 200°F on a 98°F day, with the synthetic surface running 86.5°F hotter than adjacent natural turf. OB Rag
The clinical thresholds for what those temperatures mean are also not in dispute. According to Shriners Children’s Boston, a deep burn injury occurs in just one second of contact at 155°F. At 120°F, contact for five minutes will produce a burn. EdSource
Sacramento regularly exceeds 100°F in late summer and early fall. In those ambient conditions, artificial turf surface temperatures of 150°F and higher are routine, not exceptional. The district’s two-year-old written notice of heat illness on the existing grass field at this school becomes much more serious when the proposed remedy is a surface that runs 60 to 70 degrees hotter.
JFK High School has older students, who self-regulate, who can verbalize when they’re overheating, who don’t sit on the field, and who don’t have recess in the same way an elementary school does. The “positive feedback” from JFK doesn’t translate.
Why the JFK comparison fails on its own terms
Even setting aside age and developmental differences, the JFK comparison has a problem the district hasn’t addressed: the JFK installation is too new to evaluate.
Ralston has stated in writing that JFK’s olive pit infill turf was installed “this past summer” — meaning summer 2025. By the time construction is scheduled to begin at Crocker/Riverside in May 2026, the JFK field will have existed for less than a year. There has been no full Sacramento summer of full school use. There has been no documented reporting on heat illness, allergic reactions, respiratory effects, or maintenance failures at JFK over multiple seasons.
A nine-month-old high school installation is not evidence that an elementary school installation will be safe over a decade.
What other districts have done with the same question
When other school districts have weighed the elementary-versus-high-school distinction, they have reached a different conclusion than SCUSD.
On November 18, 2025, the Los Angeles Unified Board of Education unanimously voted to prohibit new artificial turf installations at early education, elementary, and middle schools in the district. The same resolution commissioned a comprehensive study on artificial turf versus natural grass for high school athletic fields specifically — explicitly recognizing that the calculus is different at different ages.
LAUSD is California’s largest school district, serving more than 418,000 students across over 780 schools. It is the second-largest school district in the United States. It evaluated the same evidence SCUSD is now evaluating. It came to the opposite conclusion for elementary schools. It did so unanimously. And it did so less than four months before SCUSD signed its construction contract for Crocker/Riverside on March 5, 2026.
Why this matters
The district has built its public defense of this project on a single comparison: JFK High School. That comparison fails on developmental grounds, on body-size grounds, on behavioral grounds, on heat-physiology grounds, and on basic timing. It is not a precedent. It is a deflection.
The Sacramento City Unified School District Board of Education can still recognize what LAUSD’s Board recognized: that elementary-age children require separate evaluation, separate evidence, and separate protections. The Board has the authority to direct staff to revise the project scope. The funding is allocated. Construction has not yet begun.
Your email is what makes the Board look closely at the comparison the district has been making.