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Table 7 Contamination summary revealing regional differences

From: Environmental surveillance of commonly-grown vegetables for investigating potential lead and chromium contamination intensification in Bangladesh

  Key features
North-West region
17 Districts
Bogra, Chapai Nawabganj, Dinajpur, Gaibandha, Jamalpur, Joypurhat, Kurigram, Lalmonirhat*, Naogaon, Natore, Nilphamari, Panchagarh, Rajshahi, Rangpur, Sherpur, Sirajganj, Thakurgaon
(i) Pb contamination:
-found in 18 samples
-distributed over 12 Districts (averaged 1.5 samples per district)
-includes 4 potato, 4 cabbage, 2 spinach, 6 radish, and 2 bean samples
(ii) Cr contamination:
-No samples contaminated
(iii) Cd contamination:
-found in 19 samples
-distributed over 13 Districts (averaged 1.46 samples per district)
-includes 8 potato, 1 cabbage, 2 spinach, 3 radish, and 5 bean samples
North-East region
6 Districts
Habiganj, Moulvibazar, Mymensingh, Netrokona, Sunamganj, Sylhet
(i) Pb contamination:
-found in 8 samples
-distributed over 5 Districts (averaged 1.6 samples per district)
-includes 3 potato, 2 cabbage, no spinach, 2 radish, and 1 bean samples
(ii) Cr contamination:
-No samples contaminated
(iii) Cd contamination:
-found in 7 samples
- distributed over 3 Districts (averaged 2.3 samples per district)
-includes 2 potato, 2 cabbage, no spinach, no radish, and 3 bean samples
Central region
22 Districts
Brahmanbaria, Chuadanga, Dhaka, Faridpur, Gazipur, Gopalganj, Jessore, Jhenaidah, Kishoreganj, Kushtia, Madaripur*, Magura, Manikganj, Meherpur, Munshiganj, Narail, Narayanganj*, Narshingdi, Pabna, Rajbari, Shariatpur, Tangail
(i) Pb contamination:
-found in 37 samples
-distributed over 20 Districts (averaged 1.85 samples per district)
-includes 5 potato, 2 cabbage, 12 spinach, 7 radish, and 11 bean samples
(ii) Cr contamination:
-found in 2 samples
-distributed over 2 Districts (averaged 1 sample per district)
- these are potato samples
(iii) Cd contamination:
-found in 13 samples
- distributed over 10 Districts (averaged 1.3 samples per district)
-includes 2 potato, no cabbage, 2 spinach, 1 radish, and 8 bean samples
South-West region
9 Districts
Bagerhat*, Barguna, Barisal, Bhola, Jhalokathi, Khulna, Patuakhali, Perojpur, Satkhira
(i) Pb contamination:
-found in 8 samples
-distributed over 5 Districts (averaged 1.6 samples per district)
-includes 1 potato, no cabbage, 4 spinach, 1 radish, and 2 bean samples
(ii) Cr contamination:
-No samples contaminated
(iii) Cd contamination:
-found in 6 samples
-distributed over 4 Districts (averaged 1.5 samples per district)
-includes 1 potato, no cabbage, 1 spinach, 1 radish, and 3 bean samples
South-East region
10 Districts
Bandarban*, Chandpur, Chittagong, Comilla, Cox’s Bazar, Feni, Khagrachari*, Laxmipur, Noakhali*, Rangamati
(i) Pb contamination:
-found in 13 samples
-distributed over 7 Districts (averaged 1.86 samples per district)
-includes 3 potato, no cabbage, 4 spinach, 2 radish, and 4 bean samples
(ii) Cr contamination:
-No samples contaminated
(iii) Cd contamination:
-found in 6 samples
-distributed over 5 Districts (averaged 1.2 samples per district)
-includes 2 potato, 1 cabbage, no spinach, no radish, and 3 bean samples
  1. * Districts that did not contain any sample with contamination for at least one of the heavy metals