Smoking cannabis around a child in California is not banned outright, but it is illegal in several specific situations and can lead to child endangerment charges, a CPS investigation, or loss of custody depending on where you do it and how the child is affected. Proposition 64 legalized adult recreational use, and it also expressly preserved every existing law that protects children. So the question of whether it is illegal to smoke weed around a child in California has two answers: the cannabis code itself only restricts certain locations, but a stack of other laws — criminal, dependency, and family — can still apply when a child is exposed.
Where Cannabis Use Near Kids Is Specifically Restricted
Health and Safety Code 11362.3 prohibits smoking or ingesting cannabis in any public place, smoking it anywhere tobacco smoking is banned, and smoking it within 1,000 feet of a school, daycare center, or youth center while children are present. The buffer rule does not apply if you are inside a private residence and the smoke is not detectable on those grounds.1California Legislative Information. California Health and Safety Code HSC 11362.3 The buffer applies even if you are on a public sidewalk or sitting in a parked car within that distance.
Home-based daycare providers face a stricter rule. Under Health and Safety Code 1596.795, smoking of any kind is prohibited on the premises during operating hours, and because cannabis follows tobacco’s location rules, that prohibition reaches cannabis too.2California Legislative Information. California Health and Safety Code 1596.795 California’s clean-air rules extend to cannabis in other enclosed spaces the state treats as smoke-free, including government buildings, public transit, foster care facilities, and licensed daycares.3County of Los Angeles Public Health. California’s Clean Air Laws 2024
What the cannabis code does not do is broadly ban consumption “in the presence of a minor.” That is a common misconception. Health and Safety Code 11362.45 makes clear, though, that adult legalization does not override any other law protecting a child’s health or welfare.4California Legislative Information. California Health and Safety Code HSC 11362.45 Child endangerment, dependency, and custody laws all remain fully in force, and their consequences are much heavier than anything in the cannabis code.
Smoking in a Car With a Minor
Health and Safety Code 118948 makes it illegal to smoke tobacco in any motor vehicle, moving or parked, when a minor under 18 is present. The violation is an infraction with a fine of up to $100.5California Legislative Information. California Health and Safety Code 118948 Because 11362.3 bans cannabis smoking wherever tobacco smoking is banned, that vehicle rule reaches cannabis as well.1California Legislative Information. California Health and Safety Code HSC 11362.3
The $100 fine is the smallest part of the exposure. A parent caught smoking cannabis in the car with a child in the back could also face open-container issues under the cannabis code and, if a prosecutor decides the enclosed space put the child at genuine risk, a child endangerment charge on top. The infraction itself is minor. The paper trail it creates can matter enormously later, in a custody fight or CPS case.
Child Endangerment Under Penal Code 273a
The statute with real teeth here is Penal Code 273a. It criminalizes willfully placing a child in a situation where the child’s health or safety is endangered, or causing or permitting a child to suffer unjustifiable physical pain or mental suffering.6California Legislative Information. California Penal Code 273a A prosecutor does not have to prove actual harm. Proving the child was put in a dangerous situation is enough.
The offense has two tiers:
- Felony under 273a(a). When the circumstances are likely to produce great bodily harm or death, the penalty is two, four, or six years in state prison. Repeated exposure in a sealed room, or smoking while so impaired you cannot respond to the child’s needs, can support this level.
- Misdemeanor under 273a(b). When circumstances are not likely to produce great bodily harm or death, the maximum is one year in county jail.
Even a misdemeanor conviction carries a mandatory minimum probation of 48 months and at least one year in a court-approved child abuser’s treatment program, plus a protective order restricting contact with the child.6California Legislative Information. California Penal Code 273a These consequences last well beyond any jail time.
Prosecutors weigh several factors before charging: how enclosed the space was, how often it happened, the child’s age, whether the child showed symptoms of secondhand exposure, and whether the adult was too impaired to supervise. A single outdoor incident is unlikely to produce charges. Hotboxing a car with a toddler in a car seat is a different case entirely.
Edibles, Access, and Penal Code 272
Smoking is only part of the picture. Edible cannabis products account for a growing share of pediatric emergency visits because they often look like ordinary candy, cereal, or baked goods. A child who eats a full package of THC gummies can become unresponsive and may need hospital care. California’s Department of Cannabis Control requires legally sold cannabis products to come in child-resistant packaging that meets Poison Prevention Packaging Act standards.7Department of Cannabis Control. Child-Resistant Packaging (CRP) Once the package is opened at home, that seal is often defeated and the products look identical to regular snacks.
Penal Code 272 reaches adults whose actions cause or tend to cause a child to fall under the juvenile court’s jurisdiction. It applies when an adult’s negligence gives a child access to cannabis, even if the child never actually consumes any. Conviction is a misdemeanor punishable by up to one year in county jail, a fine of up to $2,500, or both.8California Legislative Information. California Penal Code 272 If the child ingests cannabis and is harmed, the case can escalate into 273a territory fast.
Keeping cannabis products in a locked container or on a high shelf out of reach is the practical difference between no legal exposure and a charge that carries jail time.
CPS Investigations
CPS involvement does not require a criminal charge. Under Welfare and Institutions Code 300(b)(1), a child can be declared a dependent of the juvenile court if a parent has failed to adequately supervise or protect the child, including through substance abuse.9California Legislative Information. California Welfare and Institutions Code 300 Cannabis use alone does not automatically trigger intervention. What draws CPS attention is a pattern: frequent smoking in an enclosed space with the child present, impairment while responsible for a young child, or a child showing signs of secondhand exposure.
Investigations usually start with a report from a mandated reporter such as a teacher, doctor, or school counselor. Caseworkers visit the home, interview household members, and look at living conditions, ventilation, whether cannabis is stored where a child can reach it, and whether the parent appears impaired during the visit. A positive THC test in the child or respiratory symptoms raise the urgency sharply. Early cooperation with a voluntary safety plan often ends things there; refusal or repeated violations can push the case into juvenile dependency court, and in extreme cases the court can remove the child.
Custody and Visitation
In custody disputes, cannabis use around a child is one of the most effective arguments a co-parent can raise. Family Code 3011 requires judges to consider the habitual or continual illegal use of controlled substances, habitual alcohol abuse, and habitual abuse of prescription drugs when determining custody.10California Courts. Family Code Section 3011 Occasional adult use of a legal substance may not meet the “habitual illegal use” standard on its own, but the statute also lets the court weigh “any other factors it finds relevant,” giving judges wide latitude to consider how cannabis use affects parenting.
A parent who smokes around a child in an enclosed space, leaves edibles accessible, or appears impaired during parenting time hands the other parent exactly the evidence a family court needs. Judges rely on witness testimony, medical records, and sometimes an evaluation from a child psychologist. A court that concludes cannabis use is interfering with a child’s wellbeing can order supervised visitation, mandatory drug testing, or a ban on consumption during parenting time. In serious cases, it can reduce parenting time or shift primary custody to the other parent.
Federally Assisted Housing Adds Another Layer
If your family lives in public housing or uses a Section 8 voucher, cannabis use carries a risk most California households do not face. Cannabis remains a Schedule I controlled substance under federal law, and the Quality Housing and Work Responsibility Act requires housing authorities and property owners to include lease provisions permitting eviction of any household with a member who uses marijuana, regardless of state legalization.11U.S. Department of Housing and Urban Development. Use of Marijuana in Multifamily Assisted Properties Owners have some case-by-case discretion, but complaints from neighbors about drifting smoke frequently prompt action.
For a parent smoking around a child in this kind of housing, the problems can stack: a neighbor’s complaint triggers a CPS visit, which can produce a child endangerment referral, while eviction proceedings run in parallel. Losing subsidized housing makes every other legal problem harder to resolve, because both the family court and CPS look at whether the child has a stable home.
What Smoking at Home Actually Means
The situation most parents ask about is the simplest one: smoking at home, in private, with their own child present. The cannabis code does not specifically prohibit this. There is no equivalent inside a private residence to the school buffer or the vehicle ban. But not specifically prohibited by the cannabis code is a long way from safe from legal consequences. Section 11362.45 preserves every other child-protection law, which means Penal Code 273a, Penal Code 272, WIC 300, and the family court’s custody authority all still apply.4California Legislative Information. California Health and Safety Code HSC 11362.45
The safest habits are simple. Consume outdoors or in a separate, ventilated room. Never be the sole supervising adult for a young child while impaired. Store cannabis, and especially edibles, where a child cannot reach them. These practical steps protect both your child and your legal standing more effectively than knowing every statute number. If you are already facing charges or a CPS investigation tied to cannabis use around a minor, a criminal defense or family law attorney familiar with California’s cannabis framework can help before the case escalates.