Foodborne illness affects roughly 9.9 million Americans every year from just seven major pathogens alone, leading to an estimated 53,300 hospitalizations and 931 deaths. The good news: most of these cases are preventable with a handful of consistent kitchen habits. Prevention comes down to four principles: keeping things clean, separating raw proteins from ready-to-eat foods, cooking to safe temperatures, and controlling the clock on how long food sits out.
Keep Your Hands and Surfaces Clean
Handwashing is the single easiest intervention, and most people don’t do it thoroughly enough. Scrub your hands with soap for at least 20 seconds, making sure to lather the backs of your hands, between your fingers, and under your nails. Wash before and after handling raw meat, after cracking eggs, and after touching your face, phone, or trash can during cooking.
Countertops, cutting boards, and utensils that have contacted raw meat or poultry need to be washed with hot soapy water before anything else touches them. Sponges and dish towels harbor bacteria quickly, so replace sponges often and launder towels between cooking sessions.
Wash Produce the Right Way
All fruits and vegetables should be rinsed under running water before you eat or prep them, even if you plan to peel them. For firm produce like melons and cucumbers, use a clean produce brush. Skip the soap, detergent, or commercial produce washes. The FDA advises against all of them because produce is porous and can absorb soap residues that make you sick. Plain running water is the safest and most effective option.
Separate Raw Proteins From Everything Else
Cross-contamination is one of the most common causes of foodborne illness at home. Raw chicken juice on a cutting board that later holds salad greens can transfer bacteria directly to food you won’t be cooking. The simplest solution is to use separate cutting boards for raw meat and for produce. Professional kitchens use a color-coded system (red for raw meat, blue for fish, green for fruits and vegetables), and while you don’t need that level of detail at home, having at least two dedicated boards makes a real difference.
Replace cutting boards once they develop deep grooves or heavy staining. Those grooves trap bacteria even after thorough washing. Nonporous boards (plastic, glass, composite) are easier to sanitize than wood, though both work if kept in good condition. In your refrigerator, store raw meat on the lowest shelf so its juices can’t drip onto other foods.
Cook to Safe Internal Temperatures
Color and texture are unreliable ways to judge whether meat is done. A food thermometer is the only accurate tool, and it costs a few dollars. Here are the temperatures that kill harmful bacteria:
- Poultry (chicken, turkey, duck): 165°F (74°C) for all cuts, including ground poultry
- Ground meat and sausage (beef, pork, lamb): 160°F (71°C)
- Steaks, roasts, and chops (beef, pork, lamb, veal): 145°F (63°C), then let the meat rest for 3 minutes before cutting
- Fish: 145°F (63°C), or until the flesh is opaque and flakes easily with a fork
- Shrimp, lobster, crab, scallops: cook until the flesh turns pearly white and opaque
- Clams, oysters, mussels: cook until the shells open on their own
Insert the thermometer into the thickest part of the meat, away from bone. For burgers, check from the side into the center. The 3-minute rest time for steaks and roasts isn’t optional: the internal temperature continues to rise during that window, finishing off bacteria near the surface.
Respect the Danger Zone
Bacteria multiply fastest between 40°F and 140°F, a range food safety experts call the “danger zone.” In that window, bacterial populations can double every 20 minutes. The practical rule: never leave perishable food at room temperature for more than 2 hours. If the ambient temperature is above 90°F (think summer barbecues or a hot kitchen), that window shrinks to 1 hour.
This applies in both directions. Hot food sitting on the counter cooling down is in the danger zone, and cold food warming up on a buffet table is too. When serving food outdoors, use ice baths for cold dishes and warming trays for hot ones.
Set Your Fridge and Freezer Correctly
Your refrigerator should stay between 35°F and 38°F, and it must never exceed 40°F. The optimal setting is 37°F. Your freezer should be set to 0°F. An inexpensive appliance thermometer lets you verify these numbers, since the dial settings on many refrigerators aren’t precise. Check it periodically, especially in summer when the compressor works harder.
Thaw Frozen Food Safely
Leaving frozen meat on the counter to thaw is one of the most common food safety mistakes. The outer layers reach danger zone temperatures long before the center thaws, giving bacteria hours to multiply. There are three safe methods:
Refrigerator thawing is the safest but slowest option. Plan on a full 24 hours for every 5 pounds. Even a pound of ground meat or boneless chicken breasts needs a full day. The advantage is that thawed food stays at a safe temperature, so you don’t have to cook it immediately.
Cold water thawing works faster. Seal the food in a leak-proof bag and submerge it in cold tap water, changing the water every 30 minutes. A pound of meat thaws in about an hour. A 3- to 4-pound package takes 2 to 3 hours. Cook the food immediately once it’s thawed.
Microwave thawing is the fastest but requires the most attention. Some parts of the food will start to cook during the process, entering the danger zone. Cook the food right away after microwave thawing, with no holding time in between.
Store and Cool Leftovers Properly
Leftovers need to be refrigerated within 2 hours of cooking or within 2 hours of being removed from a warming appliance. Don’t wait for food to cool to room temperature on the counter first. To speed up cooling, divide large batches into shallow containers rather than placing one deep pot in the fridge. A thick container of soup or stew can stay warm in the center for hours, even inside a cold refrigerator, giving bacteria a foothold.
Take Extra Care for High-Risk Groups
Certain people face much higher odds of severe illness, hospitalization, or death from the same bacteria that might cause only mild discomfort in a healthy adult. The groups at greatest risk are pregnant women and their unborn babies, children under 5, adults over 65, and anyone with a weakened immune system (including people with cancer, diabetes, HIV/AIDS, organ transplants, or autoimmune diseases).
If you or someone you cook for falls into one of these groups, several common foods carry disproportionate risk:
- Raw or undercooked meat, poultry, and eggs: this includes homemade Caesar dressing, runny eggs, cookie dough, and cake batter
- Raw or undercooked seafood: raw oysters, sushi, smoked fish served cold, and partially cooked shrimp or crab
- Unpasteurized dairy: raw milk, raw milk cheeses, and soft cheeses like queso fresco or queso blanco (even pasteurized versions)
- Deli meats and hot dogs: safe only if reheated until steaming hot
- Raw sprouts: alfalfa, bean, and all other sprouts can harbor bacteria that washing won’t remove
- Unpasteurized juices: look for the required warning label on the packaging
- Raw flour: in any form, including homemade play dough
For these groups, the consequences of foodborne illness aren’t just a bad day. Listeria, for example, causes only about 1,250 infections per year in the U.S. but leads to roughly 1,070 hospitalizations and 172 deaths, making it one of the deadliest foodborne pathogens per case. Pregnant women are especially vulnerable to listeria, which can cause miscarriage and stillbirth even when the mother’s symptoms are mild.