Heavy metals show up in a surprisingly wide range of everyday items, from the rice in your pantry to the paint on your walls. The most common ones people encounter are lead, arsenic, mercury, and cadmium, and they enter your life through food, water, consumer products, and your home environment. Here’s where they actually are and what matters most.
Rice and Grains
Rice is one of the most well-documented food sources of heavy metals, particularly arsenic. A report by Healthy Babies, Bright Futures found arsenic in 100% of rice samples tested across 145 popular brands, with average heavy metal levels ranging from 63 to 188 parts per billion and some samples reaching 240 ppb. One in four samples exceeded the FDA’s arsenic limit for infant rice cereal. Arsenic appeared at the highest levels, followed by cadmium, with lead and mercury present in smaller amounts.
Not all rice is equal, though. Brown rice, white rice grown in the southeastern United States, and arborio rice from Italy tend to have higher contamination levels. If you want to reduce your exposure, white rice from California, sushi rice, Thai jasmine, and Indian basmati are lower-risk options. Grains like quinoa, barley, and couscous have lower heavy metal levels overall and make good alternatives to rotate into your diet.
Fish and Seafood
Mercury is the primary concern with seafood. It accumulates in fish through a process where small organisms absorb mercury from water, then larger fish eat those organisms, concentrating mercury at higher levels up the food chain. The FDA divides fish into three categories based on mercury content.
The lowest-mercury options, safe for two to three servings per week, include salmon, shrimp, cod, tilapia, catfish, sardines, anchovies, pollock, crab, and canned light tuna. Moderate-mercury fish like halibut, grouper, snapper, mahi mahi, albacore tuna, and yellowfin tuna are fine for about one serving per week. Seven types of fish have mercury levels high enough that the FDA recommends avoiding them entirely: king mackerel, marlin, orange roughy, shark, swordfish, Gulf of Mexico tilefish, and bigeye tuna.
Baby Food
Heavy metals in baby food have drawn significant attention in recent years. Because arsenic, lead, and other toxic elements exist naturally in soil and water, they end up in the fruits, vegetables, and grains used to make baby food, whether store-bought or homemade. Infant rice cereal has been a particular concern, though the FDA notes that manufacturers have made significant progress in reducing arsenic levels through selective sourcing and testing since 2011. The FDA recommends that rice cereal not be a baby’s only grain source. Root vegetables and fruit juices can also carry trace amounts of these metals.
Protein Powders and Supplements
Dietary supplements are not held to the same testing standards as conventional food, and the results show it. Consumer Reports tested popular protein powders for arsenic, cadmium, and lead, and found that more than two-thirds contained more lead per serving than their safety experts consider acceptable for an entire day. The worst offenders contained 1,200 to 1,600 percent of their daily level of concern for lead in a single scoop.
Plant-based protein powders were the biggest problem, containing on average nine times more lead than dairy-based (whey) products and twice as much as beef-based options. Plants tend to absorb more metals from soil than animal sources, which explains the difference. If you use protein powder regularly, choosing a whey-based product or looking for brands that publish third-party testing results can meaningfully lower your exposure.
Drinking Water
Arsenic and lead are the two heavy metals most commonly found in tap water. The EPA set the standard for arsenic in drinking water at 10 parts per billion in 2001, replacing the previous limit of 50 ppb. Lead typically enters water not at the treatment plant but through old lead service lines, solder, and plumbing fixtures in buildings, especially those built before 1986. This is why two homes on the same block can have very different lead levels. Running your tap for 30 seconds to two minutes before drinking or cooking, especially first thing in the morning, helps flush out water that has been sitting in contact with pipes.
Paint and Household Dust
If your home was built before 1978, it likely contains lead-based paint. The federal government banned it that year, though some states acted earlier. The paint itself isn’t dangerous when it’s intact, but peeling, chipping, cracking, or chalking paint releases lead dust and chips that settle on surfaces throughout your home.
Lead dust is especially persistent. It forms when painted surfaces rub together, like window frames sliding open and shut, or when old paint is scraped, sanded, or heated during renovations. That dust lands on windowsills, floors, and objects that people (and especially children) touch. Sweeping or vacuuming can send settled lead dust back into the air. Even homes where the paint appears to be in good condition can have lead dust from normal wear on doors, railings, and window components. If you’re planning renovations in a pre-1978 home, using a contractor certified in lead-safe work practices is important, because disturbing lead paint improperly can dramatically increase contamination.
Cookware and Ceramics
Certain types of pottery and ceramicware can leach lead into food and drinks. Traditional or folk pottery uses earthenware clay that requires a glaze to hold liquids, and that glaze often contains lead. When the pottery is fired at the correct temperature, the lead bonds tightly into the glaze and very little migrates to food. But if it’s improperly fired, lead can leach out in meaningful amounts. No amount of washing or boiling removes lead from pottery once it’s there.
The FDA flags several types as higher risk: handmade pottery with a crude or irregular appearance, antique ceramics, items purchased from flea markets or street vendors, and pieces decorated in bright orange, red, or yellow (lead is used with these pigments to intensify their color). Even potters who have switched to lead-free glazes may unknowingly contaminate their work if they use old kilns that still contain lead residue from previous firings.
Cosmetics
The FDA has tested cosmetics for seven heavy metals: arsenic, cadmium, chromium, cobalt, lead, mercury, and nickel. These metals appear because the mineral pigments, clays, and talcs used in makeup naturally contain trace amounts. The FDA found levels that were generally very small, with recommended limits of 10 ppm for lead in lipsticks and other cosmetics, 3 ppm for arsenic in color additives, and strict restrictions on mercury (allowed only as a preservative in eye-area products at no more than 65 ppm, and essentially banned in everything else). Brightly colored or heavily pigmented products like eye shadows and blushes are more likely to contain trace metals from their pigment sources.
Soil and Industrial Contamination
Heavy metals in soil come from both natural geology and decades of human activity. Mining, metal smelting, coal burning, pesticide and fertilizer application, and vehicle emissions have all deposited metals into the ground. Even industries with relatively low emissions, like glass production and aluminum smelting, can contaminate surrounding soil over years of operation through gradual dust accumulation. Cadmium, for example, spreads through airborne dust from factory operations and settles into agricultural land at distances from the source.
This matters for home gardeners and anyone living near current or former industrial sites. Metals in contaminated soil can be tracked indoors on shoes, absorbed by homegrown vegetables, or stirred into the air as dust. If you garden in an urban area or near industrial land, getting your soil tested is a practical first step. Raised beds filled with clean soil are a straightforward workaround for contaminated ground.