Sustancia química designada

Structure of naphthalene, a PAH
CAS Number
various

PAHs are formed when materials like gasoline, diesel, tobacco, and wood are burned. They also form when foods are grilled, barbecued, smoked, fried, or roasted.

Hydroxy-polycyclic aromatic hydrocarbons (hydroxy-PAHs) are measured as indicators of exposure to the various PAHs.

Fact Sheet

PAHs are found in

  • Tobacco and marijuana smoke, including from cigarettes, cigars, and pipes; and chewing tobacco.
  • Exhaust from cars, trucks, and buses, as well as road dust.
  • Wood smoke, such as from fireplaces, wood stoves, campfires, and wildfires.
  • Exhaust from gas burners, unvented gas fireplaces, and kerosene heaters.
  • Smoke from grilling or burning cooking oil or food.
  • Food that has been grilled, barbecued, smoked, fried, or roasted, and some teas.
  • Liquid smoke seasonings and flavorings.

Possible health concerns of some PAHs

  • May contribute to asthma, bronchitis, and other respiratory problems.
  • May affect the developing fetus, including effects on growth.
  • May reduce fertility and interfere with the body’s natural hormones.
  • Can increase cancer risk.

Possible ways to reduce exposure to PAHs

  • Take steps to improve indoor air quality:
    • Do not smoke or allow others to smoke in your home or car, or around your child.
    • Always use an exhaust fan or open windows when cooking indoors, especially when cooking with oils heated at high temperatures, or whenever using a gas stove.
    • Do not use a gas oven or gas burners to heat your home.
    • If you cook with barbecues and grills, use them outdoors only.
    • Do not idle cars inside garages, especially garages attached to your home.
    • Avoid burning wood, especially for home heating.
  • Limit how much you eat grilled, barbecued, smoked, fried, or roasted food. Try steaming, boiling, stewing, or poaching your food more often. Avoid burned food.
  • Because PAHs can collect in dust:
    • Wash your and your child’s hands often, especially before preparing or eating food.
    • Clean your floors regularly, using a wet mop or HEPA vacuum if possible, and use a damp cloth to dust.

For More Information

Fact sheet on PAHs: http://www.atsdr.cdc.gov/toxfaqs/tfacts69.pdf
Structure of DDT, an organochlorine pesticide
CAS Number
various

Organochlorine pesticides were once widely used in agriculture and for home pest control.  Most organochlorine pesticides, including all those measured by Biomonitoring California, are no longer used in the U.S.  These pesticides have spread through the environment and take a long time to break down. 

Fact Sheet

Organochlorine pesticides are found in

  • Some high‐fat dairy products, such as butter and high‐fat cheeses like cream cheese and American cheese.
  • Some high‐fat meats, such as some ground beef.
  • Some fatty fish, such as salmon and canned sardines. Fish are still good for you to eat. Fatty fish are an excellent source of healthy fats (like “omega‐3” fatty acids) and protein.

Possible health concerns

  • May affect the developing fetus, possibly leading to later changes in learning and behavior.
  • May interfere with the body’s natural hormones.
  • May have effects on reproduction, such as decreased fertility.
  • May increase cancer risk.

Possible ways to reduce exposure

Organochlorine pesticides have been decreasing in the environment and food because they are no longer used in the U.S. You might further reduce your exposure by:

  • Including plenty of variety in your diet.
  • Trimming off skin from fish and fat from meat and cooking on a rack to let fat drain off.
  • Washing your hands often, especially before eating or preparing food, cleaning your floors regularly, and dusting with a damp cloth. This is because organochlorine pesticides may be in dust and soil from past use.

For More Information

If you catch fish to eat, check fish advisories for specific water bodies (open link and scroll down): http://www.oehha.ca.gov/fish/so_cal/index.html

Biomonitoring California Information

Documents, Presentations, and Publications

Black and white chemical structure of perchlorate
CAS Number
14797-73-0

Perchlorate is an ingredient in rocket fuel and explosives. It also occurs naturally in dry regions, such as in the Southwestern U.S. Industrial uses of perchlorate have led to contamination of soil, groundwater, and drinking water in some areas of California. Perchlorate lasts a long time in the environment and can accumulate in various crops.

Fact Sheet

Perchlorate is found in

 

  • Solid fuel for rockets and missiles.
  • Road flares, fireworks, explosives, and matches.
  • Some drinking water sources, near areas where perchlorate contamination has occurred.
  • Some fruits and vegetables, such as lettuce, spinach, tomatoes, and cantaloupe.
  • Some milk and some powdered infant formula.

 

Possible health concerns

Perchlorate can interfere with the thyroid gland’s ability to use iodide. This can decrease production of thyroid hormone, which:

  • May affect brain development in the fetus and infant. • May affect a child’s ability to learn.
  • May increase risk factors for heart disease.

 

Possible ways to reduce exposure

 

  • If you live in an area where perchlorate contamination is a concern and your water comes from a private well, consider having it tested for perchlorate. (If your water comes from a public water supplier, it is already tested regularly for perchlorate.)
  • Include plenty of variety in your and your children’s diets.

 

Importance of healthy levels of iodide

Maintaining a healthy level of iodide in the body is important. A good way to get the right amount of iodide is through your diet, by eating foods like seafood, dairy products, and eggs.

Periodic table entry for uranium that includes the atomic number, abbreviation and mass
CAS Number
various

Natural uranium is a weakly radioactive metal that is found in many types of rock, and low levels of it can end up in some drinking water sources and foods. Enriched uranium is derived from natural uranium, but is much more radioactive. Enriched uranium is used as fuel in nuclear power plants and in nuclear weapons. Depleted uranium, a byproduct of uranium processing, is used in military and medical applications. Depleted uranium can have toxic effects similar to natural uranium, but is less radioactive.

Fact Sheet

Uranium is found in

  • Drinking water sources in some places, such as parts of the Central Valley and some areas of Southern California.
  • Some foods, such as root vegetables and leafy greens, grown in areas containing uranium in soil or water.
  • Radiation-shielding equipment containing depleted uranium, used in medical and other applications.
  • Specialized ammunition and other military equipment made with depleted uranium.

Possible health concerns of uranium

  • Can cause kidney damage.
  • Can increase cancer risk.

Possible ways to reduce exposure to uranium

  • If your water comes from a private well, have it tested for metals, including uranium. (If your water comes from a public water supplier, it is already tested regularly for uranium.)
  • If you work with uranium, follow all occupational safety guidelines for your industry.

Biomonitoring California Information

Documents, Presentations, and Publications

Periodic table entry for thallium that includes the atomic number, abbreviation and mass
CAS Number
various

Thallium is a metal that is found in nature.  It is used in various specialized applications in electronics, medicine, and research.  Historically, it was used as a rat poison, but this use was banned in 1972 because thallium is very toxic to humans.  Thallium is released into the environment at very low levels from raw materials used by some industries, such as oil and gas operations, cement plants, and steel manufacturers.

Fact Sheet

Thallium is found in

  • Components used in electronics, such as semiconductors.
  • Some drinking water sources, such as well water that has been affected by industrial or wastewater discharges. This could include discharges from some oil and gas operations.
  • Air and dust near certain industrial facilities that can release thallium, such as cement plants and steel manufacturers.
  • Cigarette and other tobacco smoke.

Possible health concerns of thallium

Thallium is highly toxic and can harm many important processes in the body. Thallium:

  • Can harm the nervous system.
  • Can damage vision.
  • Can cause hair loss.

Possible ways to reduce exposure to thallium

  • If your water comes from a private well, have it tested for metals, including thallium.  (If your water comes from a public water supplier, it is already tested regularly for thallium.)
  • If you work with materials that contain thallium or at facilities where thallium may be released into the air, follow all occupational safety guidelines for your industry. 

Biomonitoring California Information

Documents, Presentations, and Publications

Periodic table entry for molybdenum that includes the atomic number, abbreviation and mass
CAS Number
various

Molybdenum is an essential nutrient that we get mainly from food. It is normal and healthy to have some molybdenum in your body. Molybdenum is also a metal used in various industries and products. For example, a compound called molybdenum trioxide is used to make metal alloys like steel more durable. Molybdenum trioxide is also used as a flame retardant in some plastics, such as polyvinyl chloride (PVC). You might be exposed to higher levels of molybdenum or molybdenum compounds through certain jobs, like working with steel.

Fact Sheet

Molybdenum is found in

  • Certain foods, including legumes (beans, lentils, and peanuts), nuts, rice, and liver.
  • Some dietary supplements.
  • Metal alloys used in a variety of applications, including:
    • Some artificial joints for the hip and knee.
    • Welding supplies and equipment.
  • Flame retardants in some plastics, such as polyvinyl chloride (PVC) plastic.

Molybdenum is an essential nutrient

  • A small amount of molybdenum is needed to support many important processes in the body, such as metabolism and protecting cells from damage.

Possible health concerns of too much molybdenum, or of molybdenum trioxide

  • Too much molybdenum:
    • May cause gout-like symptoms, such as joint pain.
    • Might contribute to reproductive problems.
  • Molybdenum trioxide may increase cancer risk.

Possible ways to avoid exposure to too much molybdenum, or to molybdenum trioxide

  • If you work with molybdenum or molybdenum trioxide, or do any welding or metalworking:
    • Be sure that your work area is well ventilated, and use proper protective equipment.
    • Follow other safe work practices, including washing hands frequently, keeping work dust out of your home, and washing work clothes separately.
    • Keep children away from welding fumes and other metal vapors and dusts.
  • If you have a metal hip or knee replacement, follow your doctor’s advice for monitoring metals, including molybdenum, in your blood.

Biomonitoring California Information

Documents, Presentations, and Publications

Periodic table entry for mercury that include the atomic number, abbreviation and mass
CAS Number
7439-97-6

Mercury is a metal that is found in nature. It is released into the environment when coal is burned, by some industries, and from past use in gold mines. Mercury builds up in certain types of fish.

Fact Sheet

Mercury is found in

  • Certain types of fish and seafood. This is the most common source of exposure to mercury.
  • Some imported face creams used for skin lightening, anti-aging, or acne.
  • Some herbal medicines and other traditional remedies, especially from China and India.
  • Silver-colored dental fillings.
  • Glass thermometers, older barometers, and blood pressure gauges.
  • Fluorescent lights, including compact fluorescent light (CFL) bulbs.

Possible health concerns

  • Can affect brain development and cause learning and behavior problems in infants and children who were exposed in the womb.
  • Can harm the nervous system and kidneys.
  • May affect the heart.
  • May increase cancer risk.

Possible ways to reduce exposure

  • Choose fish that are lower in mercury, such as salmon, tilapia, trout, canned light tuna, sardines, anchovies, and oysters.
  • Avoid fish that are high in mercury, such as shark, swordfish, orange roughy, bluefin and bigeye tuna, tilefish, king mackerel, and marlin.
  • Do not use imported face creams for skin lightening, anti-aging, or acne unless you are certain that they do not contain mercury.
  • Properly recycle CFL bulbs (see below).
  • Properly clean up broken thermometers, CFL bulbs, and other items containing mercury (see below). Do not let children play with silver liquid from items like mercury thermometers.

For More Information

Information on mercury for people who catch and eat fish, call OEHHA at (916) 327-7319 or visit: http://oehha.ca.gov/fish/mercury-fish-information-people-who-eat-fish Guide for choosing fish that are lower in mercury: http://oehha.ca.gov/media/downloads/fish/fact-sheet/2011commfishguidecolor.pdf Concerns about mercury exposure - contact the California Poison Control System hotline 1-800-222-1222 or https://calpoison.org/ Fact sheet on mercury in your environment, with information on cleaning up mercury spills: http://www.epa.gov/mercury/spills/ For CFL recycling locations, call 1-800-RECYCLING (1-800-732-9254), or visit: http://recyclenation.com/
Periodic table entry for Cadmium that include the atomic number, abbreviation and mass
CAS Number
7440-43-9

Cadmium is a metal that is found in nature and is used in many industries and products.

Fact Sheet

Cadmium is found in

  • Cigarette and other tobacco smoke.
  • Some cheap metal jewelry, including some charms.
  • Rechargeable batteries labeled NiCd or NiCad.
  • Metal plating and solder.
  • Some red, yellow, and orange decorative paints, which may be used on glassware and pottery.

Possible health concerns

  • May harm the developing infant and child.
  • May harm the reproductive system in men.
  • Can damage the lungs and kidneys.
  • Can increase cancer risk.
  • Can weaken bones.

Possible ways to reduce exposure

  • Do not smoke or allow others to smoke in your home or car, or around your child.
  • Do not let children wear or play with cheap metal jewelry or charms.
  • Do not let children handle rechargeable batteries labeled NiCd or NiCad.
  • Properly recycle batteries (see below).
  • If you do any welding or metalworking, or work with cadmium in other ways:
    • Be sure that your work area is well ventilated, and use proper protective equipment.
    • Follow other safe work practices, including washing hands frequently, keeping work dust out of your home, and washing work clothes separately.
    • Keep children away from welding fumes and other metal vapors and dusts.
  • Because cadmium can collect in dust:
    • Wash your and your child’s hands often, especially before preparing or eating food.
    • Clean your floors regularly, using a wet mop or HEPA vacuum if possible, and use a damp cloth to dust.
  • Include plenty of variety in your and your child’s diet. Eat a well-balanced diet with enough iron, which can help reduce the amount of cadmium that your body absorbs. 

For More Information

Cadmium fact sheet: http://www.atsdr.cdc.gov/toxfaqs/tfacts5.pdf Battery recycling location: http://recyclenation.com/

Biomonitoring California Information

Documents, Presentations, and Publications

Structure of triclocarban
CAS Number
101-20-2

Triclocarban is used to kill bacteria. It was previously a common ingredient in bar soaps labeled as "antibacterial" or "antimicrobial," but this use was banned by the US Food and Drug Administration (FDA) as of September 2017. This is because there are no extra health benefits of using soap with triclocarban compared to ordinary soap, and the wide use of antibacterials poses health concerns. Some other personal care products, like cosmetics, as well as some clothing and pet grooming sprays, may still contain triclocarban.

Fact Sheet

Triclocarban is found in

  • Some deodorant bar soap made prior to the FDA ban.
  • Some personal care products, like cosmetics.
  • Some clothing, such as pantyhose.
  • One type of pet grooming spray used to reduce scratching and biting of irritated skin.

Possible health concerns of triclocarban

  • May interfere with the body’s natural hormones.
  • May make it harder for antibiotics to fight infections. This is because overuse of triclocarban and other antibacterials may cause changes in bacteria that make them harder to kill.

Possible ways to reduce exposure to triclocarban

  • Avoid consumer products and personal care products labeled “antibacterial” or “antimicrobial.”
  • Check labels on personal care products and pet sprays, and avoid those that list triclocarban as an ingredient.
  • If you can’t tell from the label whether a product contains triclocarban, contact the manufacturer.

For More Information

FDA consumer information: https://www.fda.gov/ForConsumers/ConsumerUpdates/ucm378393.htm

Biomonitoring California Information

Documents, Presentations, and Publications