One 6-oz can of salmon averages about 2–3 µg of mercury, based on FDA’s 0.014 ppm data for canned salmon.
Worried about mercury in canned salmon? You’re not alone. The good news: salmon sits near the low end of the mercury scale. Most products test well below the levels seen in larger predatory fish. If you want real numbers you can use at the grocery shelf, the quick reference below breaks it down by common can sizes, then the rest of the guide explains the math, what affects the numbers, and who should pay closer attention.
Mercury Per Can Of Salmon — By Size
The figures below use the FDA’s published mean for canned salmon: 0.014 micrograms per gram (0.014 ppm). Actual brands vary a bit, yet the math gives a dependable ballpark for planning meals.
| Can Size | Edible Weight (g) | Estimated Mercury (µg) |
|---|---|---|
| 3 oz (85 g) | 85 | ~1.2 |
| 5 oz (142 g) | 142 | ~2.0 |
| 6 oz (170 g) | 170 | ~2.4 |
| 7.5 oz (213 g) | 213 | ~3.0 |
Where The Number Comes From
Regulators track mercury in commercial seafood and publish species-level means in parts per million (ppm), which equals micrograms per gram. For canned salmon, the current mean sits at 0.014 ppm, with tested samples spanning non-detect to 0.086 ppm. Multiply the ppm figure by the weight you eat to estimate the micrograms in a serving. That’s how the table above was built: weight in grams × 0.014 µg/g.
What Counts As A Serving
Most nutrition labels use 3–4 oz (85–113 g) as a reference serving for fish. Using the same 0.014 ppm mean, a 3-oz portion carries about 1.2 µg of mercury; 4 oz lands near 1.6 µg. A full 6-oz can comes out near 2.4 µg.
Why Salmon Tends To Be Low
Mercury builds up across the food chain. Long-lived predators concentrate more of it. Salmon sit lower on that chain than species like swordfish and some tunas. Many canned products also use smaller fish (pink, chum), which grow fast and don’t reach the ages that drive heavy accumulation. Result: a reliably low reading across test programs.
Pink Vs. Sockeye Vs. “Red”
Brands often pack pink salmon for everyday cans and sockeye for premium cans. Both land in the low range. Sockeye can be a touch higher than pink in some test sets due to diet and age differences, yet the mean across canned lots stays far below mid- and high-mercury fish. If you switch between the two, your intake still sits in the low bracket.
Wild, Farmed, And Region
Diet, size, and water conditions nudge results. Farmed salmon often shows similar or even lower readings than wild fish thanks to controlled feed. Wild Pacific species vary by river and ocean zone, yet still trend low. That’s why salmon appears in the “eat more often” bucket on national advice charts.
How To Read PPM And Turn It Into Micrograms
PPM looks abstract on a label, so here’s the plain math you can use any time. One ppm equals one microgram per gram. If a canned species averages 0.014 ppm, each gram contains 0.014 µg. Eat 170 g (6 oz), and the estimate is 170 × 0.014 = 2.38 µg. If your can lists drained weight, use that number. If it doesn’t, a typical 6-oz net weight can yields about 150–170 g of edible fish once drained, depending on pack style and added liquids.
Skin And Bones: Do They Change The Reading?
Most of the mercury sits in muscle. Skin and edible bones don’t swing the number much. Choose skinless/boneless for texture, not for mercury reduction. The bigger mover is serving size.
Safe Weekly Intake And Who Should Be Careful
National guidance groups salmon with “low mercury” choices and recommend two to three seafood meals each week for many people. That approach balances brain-healthy omega-3s with low contaminant exposure. If you are pregnant, may become pregnant, or feeding young kids, stick to fish from the best-choice lists and match the portion sizes on those charts. Salmon fits that lane, which is why it’s a handy pantry protein for these groups.
Portion Tips For All Ages
- Adults: aim for 8–12 oz of lower-mercury seafood across the week. Two meals often covers it.
- Kids 1–3: 1 oz portions.
- Kids 4–7: 2 oz portions.
- Kids 8–10: 3 oz portions.
- Older kids and teens: 4 oz portions.
When You Eat Salmon Alongside Tuna
Mixing species across the week keeps exposure predictable. Light tuna runs higher than salmon. Albacore runs higher still. Build your menu around lower-mercury fish like salmon, then treat the higher-mercury cans as an occasional swap. The comparison table below shows the spread.
Mercury In Popular Canned Fish (Mean PPM And Per-Serving)
Here’s a side-by-side view using the same sources and a 4-oz (113 g) serving for easy math. It shows why salmon lands in the “safe pick” column for frequent meals.
| Canned Fish | Mean Mercury (ppm) | µg Per 4-oz (113 g) |
|---|---|---|
| Salmon | 0.014 | ~1.6 |
| Light Tuna | 0.126 | ~14.2 |
| Albacore Tuna | 0.350 | ~39.6 |
| Sardines | 0.013 | ~1.5 |
| Mackerel (Chub) | 0.088 | ~9.9 |
How Brand, Species, And Processing Affect The Number
Two cans labeled “salmon” can still differ a bit. Here’s why:
Species And Size Class
Pink and chum are smaller, which keeps bioaccumulation down. Sockeye tends to be older and fattier, though still low compared with tuna.
Harvest Area
Local conditions and prey species push small swings. Reputable brands validate sources and stay within regulatory tolerance.
Draining Method
Mercury binds to muscle. Draining liquid changes weight, not the concentration in the meat. Your per-can estimate shifts only because the edible weight shifts.
Smart Shopping And Label Clues
- Check the species name. Pink for budget staples, sockeye for richer texture. Both stay low on mercury.
- Look for “no salt added” if sodium matters to you. It doesn’t change mercury; it helps with overall nutrition goals.
- Pick BPA-free lining if your store offers it. Again, unrelated to mercury, yet useful for peace of mind.
- Note net weight vs. drained weight. Use drained weight for the per-can estimate if the label lists it.
Meal Ideas That Keep You In The Low Range
Build two seafood meals this week around salmon, then add variety next week. Think salmon salad on whole-grain toast, salmon cakes with yogurt-dill sauce, or a rice bowl with crunchy veg. If you like tuna, use a light-tuna pouch once in a while and lean on salmon for the rest of your seafood plan.
Common Questions
Does Cooking Change Mercury?
Heating doesn’t move the needle. Mercury is bound in the muscle. Baking, pan-searing, or simmering won’t lower it.
Is Wild Always Lower Than Farmed?
Not a rule. Farmed fish often show low readings due to controlled feed. Wild fish stay low as well, since salmon aren’t top predators and grow fast.
Do Bones In “Traditional Pack” Matter?
The bones add calcium. They don’t add mercury in a way that changes the total meaningfully.
How To Use Official Advice
Use national fish-advice charts to pick lower-mercury species and set portions for each age group. Those charts group dozens of fish into “best choices,” “good choices,” and “choices to avoid.” Salmon sits in the top tier, which lines up with the low ppm number used in this guide. You can scan the charts online and plan a week’s menu in minutes.
Takeaways You Can Act On Today
- A standard 6-oz can delivers about 2–3 µg of mercury based on the published mean for canned salmon.
- That’s far below common tuna cans, which can run 5–20× higher depending on species.
- Two seafood meals per week built around lower-mercury fish meet nutrition goals while keeping exposure predictable.
- Pregnant people and kids can reach for salmon first, matching the serving sizes given on national charts.
Method Notes And Limits
The estimates here rely on public test means. Individual cans can land above or below the mean. Mercury readings are given for edible meat, expressed as total mercury in ppm. When a label doesn’t list drained weight, use 150–170 g as a common edible range for a 6-oz can to keep your estimate realistic. If you catch and can your own fish, follow your region’s advisories for local waters before canning day.
Want a deeper look at the reference tables and the weekly serving chart? Review the FDA mercury dataset and the EPA–FDA advice page; both are linked in the sections above and open in a new tab for quick checking.
See the FDA mercury levels table and the current EPA–FDA fish advice for full species lists and serving guidance.