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Table 1. Fish and Shellfish With Highest Levels of Mercury
SPECIES MERCURY CONCENTRATION (PPM) NO. OF SAMPLES
MEAN MEDIAN MIN MAX
MACKEREL KING 0.73 NA 0.23 1.67 213
SHARK 0.99 0.83 ND 4.54 351
SWORDFISH 0.97 0.86 0.10 3.22 605
TILEFISH (Gulf of Mexico) 1.45 NA 0.65 3.73 60


Table 2. Fish and Shellfish With Lower Levels of Mercury
SPECIES MERCURY CONCENTRATION (PPM) NO. OF SAMPLES
MEAN MEDIAN MIN MAX
ANCHOVIES 0.04 NA ND 0.34 40
BUTTERFISH 0.06 NA ND 0.36 89
CATFISH 0.05 ND ND 0.31 22
CLAMS ND ND ND ND 6
COD 0.11 0.10 ND 0.42 20
CRAB 3 0.06 ND ND 0.61 59
CRAWFISH 0.03 0.03 ND 0.05 21
CROAKER (Atlantic) 0.05 0.05 0.01 0.10 21
FLATFISH 2 0.05 0.04 ND 0.18 22
HADDOCK 0.03 0.04 ND 0.04 4
HAKE 0.01 ND ND 0.05 9
HERRING 0.04 NA ND 0.14 38
JACKSMELT 0.11 0.06 0.04 0.50 16
LOBSTER (Spiny) 0.09 0.14 ND 0.27 9
MACKEREL ATLANTIC
(N. Atlantic)		 0.05 NA 0.02 0.16 80
MACKEREL CHUB (Pacific) 0.09 NA 0.03 0.19 30
MULLET 0.05 NA ND 0.13 191
OYSTERS ND ND ND 0.25 34
PERCH OCEAN ND ND ND 0.03 6
PICKEREL ND ND ND 0.06 4
POLLOCK 0.06 ND ND 0.78 37
SALMON (Canned) ND ND ND ND 23
SALMON (Fresh/Frozen) 0.01 ND ND 0.19 34
SARDINE 0.02 0.01 ND 0.04 22
SCALLOPS 0.05 NA ND 0.22 66
SHAD (American) 0.07 NA ND 0.22 59
SHRIMP ND ND ND 0.05 24
SQUID 0.07 NA ND 0.40 200
TILAPIA 0.01 ND ND 0.07 9
TROUT (Freshwater) 0.03 0.02 ND 0.13 17
TUNA (Canned, Light) 0.12 0.08 ND 0.85 131
WHITEFISH 0.07 0.05 ND 0.31 25
WHITING ND ND ND ND 2
Table 3. Mercury Levels of Other Fish and Shellfish
SPECIES MERCURY CONCENTRATION (PPM) NO. OF SAMPLES
MEAN MEDIAN MIN MAX
BASS (Saltwater)1 0.27 0.15 0.06 0.96 35
BLUEFISH 0.31 0.30 0.14 0.63 22
BUFFALOFISH 0.19 0.14 0.05 0.43 4
CARP 0.14 0.14 0.01 0.27 2
CROAKER WHITE (Pacific) 0.29 0.28 0.18 0.41 15
GROUPER 0.55 0.44 0.07 1.21 22
HALIBUT 0.26 0.20 ND 1.52 32
LOBSTER (Northern/American) 0.31 NA 0.05 1.31 88
MACKEREL SPANISH
(Gulf of Mexico)		 0.45 NA 0.07 1.56 66
MACKEREL SPANISH
(S. Atlantic)		 0.18 NA 0.05 0.73 43
MARLIN 0.49 0.39 0.10 0.92 16
MONKFISH 0.18 NA 0.02 1.02 81
ORANGE ROUGHY 0.54 0.56 0.30 0.80 26
PERCH (Freshwater) 0.14 0.15 ND 0.31 5
SABLEFISH 0.22 NA ND 0.70 102
SCORPIONFISH 0.29 NA 0.02 1.35 78
SHEEPSHEAD 0.13 NA 0.02 0.63 59
SKATE 0.14 NA 0.04 0.36 56
SNAPPER 0.19 0.12 ND 1.37 25
TILEFISH (Atlantic) 0.15 0.10 0.06 0.53 17
TUNA (Canned, Albacore) 0.35 0.34 ND 0.85 179
TUNA (Fresh/Frozen) 0.38 0.30 ND 1.30 131
WEAKFISH (Sea Trout) 0.25 0.16 ND 0.74 27