4.2 Environmental Exposure, Violence & Disaster Preparedness

Not every injury is a fall from a changing table. Domain I.C also tests environmental exposure, violence, and disaster preparedness — the air the child breathes, the dust on the windowsill, the adult who may not be safe, the unlocked gun, and the week the power goes out. The CPNP-PC's job in primary care is to screen, counsel, and plan, then send biomedical testing and mandated reporting to the chapters that own those algorithms.

Clinic opening. A 2-year-old with recurrent wheeze lives with a grandmother who "only smokes on the porch," in a 1968 rental that is being sanded for "a little refresh," on a street that had a shooting last month. If you prescribe albuterol and never ask about smoke, renovation dust, or whether anyone at home is afraid of a partner, you treated a symptom and missed the domain.

Tobacco, vaping, and the air in the house

There is no safe level of secondhand tobacco smoke for children. Secondhand smoke is the sidestream and exhaled plume. Thirdhand smoke is the nicotine and toxicant residue that stays on clothes, hair, upholstery, car seats, and carpet long after the cigarette is out. "We only smoke outside" still brings thirdhand residue back into the crib. Counsel smoke-free homes and cars, including the cars of other caregivers. Offer cessation referral for the adult; the child's visit is a legitimate teachable moment, not a scolding session.

Vaping is not water vapor. Aerosol can carry nicotine, flavoring chemicals, and metals. Adolescents vape in bedrooms and cars where toddlers ride. Thirdhand nicotine lands on surfaces. Ask specifically — "Does anyone vape or smoke in the home or car?" — because families who quit cigarettes may not volunteer a pod device. Household cannabis smoke is an exposure too; do not pretend a pediatric lung is exempt because the product is legal for the adult in that state.

Carbon monoxide and radon (conceptual)

Carbon monoxide is colorless and odorless. Counseling that belongs at well visits and at winter visits: working CO detectors on each level, especially near sleeping areas; never run generators, charcoal grills, or cars in a garage or basement; beware malfunctioning furnaces and unvented space heaters. A family that lost power after a storm and is running a generator in the attached garage is a CO case waiting to happen — that vignette is disaster preparedness and toxicology together.

Radon is a naturally occurring soil gas. In adults it is a leading cause of lung cancer after smoking; the pediatric primary-care point is conceptual, not a demand that you recite an action-level number from memory. Ask whether the home has been tested, especially basement and lower-level bedrooms. If it has not, recommend testing and mitigation if high. You are not the radon contractor. You are the clinician who knows indoor air includes more than smoke.

Lead: prevention counseling here, screening elsewhere

Residential lead-based paint was banned for household use in 1978. Children in housing built before that year — especially peeling windowsills, chewable surfaces, and renovation — are the classic primary-care prevention story. Other sources: contaminated soil, some drinking-water service lines, take-home dust from renovation or firing ranges, and imported spices, cosmetics, pottery, candy, and toys.

Prevention actions you can teach in the exam room:

• Wet-clean dust; do not dry-sweep or dry-sand paint
• Run cold water; do not mix infant formula with hot tap water
• Shoes off at the door
• Use certified renovation (lead-safe work practices), not a weekend scraper in a pre-1978 unit
• Keep children out of the work area until cleanup is complete

Blood-lead screening ages, capillary versus venous confirmation, reference values, and public-health reporting belong in the screening chapter (Domain II.D / SDOH and disease-specific screening). Do not dump that algorithm into an injury-prevention visit note, and do not treat a prevention talk as a substitute for indicated testing. If the family lives in a pre-1978 rental with chalking windowsills, you counsel exposure reduction and you make sure screening happens. Those are two skills. This section tests the first.

Clinic vignette. A 12-month-old in a 1972 duplex. The landlord is "just scraping the trim." Correct move: stop the child's exposure (stay elsewhere or contain the work), teach wet-clean and shoes-off, and complete indicated lead screening per the screening pathway — not chelation from the well-child room and not "paint was banned so it cannot be lead."

Intimate partner violence, community violence, bullying

Screen caregivers for intimate partner violence (IPV). Do it in private — adult to the lab, child briefly with staff, or a form the partner does not watch being completed. "Do you feel safe in your relationship?" plus the brief tool your clinic uses is enough structure for the exam. Children are harmed by witnessing IPV even when they are not the person being hit. Safety planning is concrete: a packed bag, documents, extra medications, a code word with school, where to go. Do not counsel "just leave tonight" in the room with the abusive partner present.

When counseling crosses into suspected child maltreatment or a child who is not safe to go home, you have left this chapter's job. Mandated reporting, reasonable suspicion, and documentation live in the maltreatment chapter. Do not invent a CPS flowchart, a 24-hour versus 48-hour reporting calendar, or a jurisdiction-specific hotline script here. Flag it, protect the child in the moment per your setting, and use that chapter's algorithm.

Community violence is a health history: shootings on the block, unsafe walking routes, after-school gaps, a sibling already injured. Counseling is practical — safe routes, locked doors, what to do if they hear shots, connection to school and community supports — not "have you considered moving?" as the only plan. Bullying, including online and sports, is asked directly at school-age and adolescent visits. Document, involve the school, and screen for depression and suicidality (Domains I.E and the mental-health chapters). "Kids will be kids" is not an assessment.

Firearms as safety, not politics

The same storage counseling from 4.1 applies in the violence history: ask, then locked, unloaded, ammunition separate. Ask about guns in friends' homes for adolescents. An item that invites you to lecture on the Second Amendment is a distractor. An item that invites you to skip the question because it feels political is also a distractor. Unlocked firearms are how pediatric unintentional shootings and adolescent suicide attempts become deaths. That is injury prevention.

Disaster preparedness without inventing a mandate

You will not be asked to recite a federal statute that does not exist. You will be asked whether a family of a child with special health care needs can get through 72 hours if the pharmacy is closed and the power is out. That 72-hour kit concept is standard emergency-management teaching used in Bright Futures-style counseling:

Heat: never leave a child in a car — not for "just a minute," not with the window cracked. Cars kill quickly. Extra hydration, limited midday outdoor sports, cooling centers for families without air conditioning.

Cold: layered clothing, the CO risk of space heaters and indoor generators, frozen-pipe improvisations that include ovens left open.

Regional, matched to the stem. Hurricane: extra medications before the storm, evacuation route, special-needs shelter plan. Wildfire: stay indoors during poor air quality, know when practice is canceled, higher-risk children with asthma may need a well-fitted mask when they must go out. Tornado: drill and a basement or interior-room plan. Do not recite a coastal hurricane script for a Denver well visit unless the family travels. Do not claim a single federal rule requires every household to own a specific branded kit.

Exam traps. Treating outdoor-only smoking as a complete environmental fix. Skipping lead counseling because "screening is at 12 months" (prevention is still indicated, and screening is the other chapter). Asking about IPV with the partner in the room. Turning firearm storage into a political speech — or not asking at all. Inventing a legal mandate for a 72-hour kit. Building a CPS algorithm in this section instead of pointing to maltreatment when the child is unsafe.

Clinic close. For the 2-year-old in the 1968 rental: smoke-free home and car, stop the dry-sanding exposure, indicated lead screening via the screening pathway, a private IPV question, firearm storage if a gun is present, and a go-bag of albuterol, epinephrine if prescribed, and two extra days of medicines before wildfire or storm season. That is Domain I.C environmental counseling in one visit.